TACO ZONE CONTROLS WIRING GUIDE Pages Switching Relays – Single Zone Wiring Switching Relays – Oil Boiler Wiring Safety Notice Switching Relays – NON EXP Connected Together with Priority 2– 2 23 – 4 5 – 11 Switching Relays – EXP Connected Together with Priority 12 – 14 Switching Relays – Multiple Indirect Hot Water Heaters 15 – 16 Switching Relays – EXP Connected To Reset Controls (PC700, 702 & 705) 17 – 28 Zone Valve Controls – NON EXP Connected Together with Priority 29 – 34 Zone Valve Controls – EXP Connected Together with Priority 35 – 38 Zone Valve Controls – Connected To Reset Controls (PC700, 702 & 705) 39 – 46 Hydro Air Fan Controls (HAFC 101 & 201) 47 – 51 Specialty Thermostat and Zone Valve Wiring 52 – 56 Radiant Mixing Block 57 – 58 X-Pump Block 59 – 61 iSeries Mixing Valves 62 – 63 Low Water Cutoffs and Electric Water Feeders 64 – 79 Aquastat Wiring 80 – 86 Instruction Sheets 87 – 97 Standard Terms and Definitions Cross Reference – 98 99 – 100 Do it once. Do it right. © Taco Catalog No. 100-9.0 Effective Date: July 1, 2010 Supersedes Date: July 1, 2007 TACO Zone Control Product Information Switching Relays Product No. SR501 SR501-845RP SR502 SR503 SR504 SR506 Description 1 Zone Switching Relay 1 Zone Switching Relay Replacement PC Board for Honeywell R845, RA89A, RA832 or Comparable Relay 2 Zone Switching Relay with Priority 3 Zone Switching Relay with Priority 4 Zone Switching Relay with Priority 6 Zone Switching Relay with Priority Switching Relays with PowerPort Options and Expandable to 20 Zones Product No. Description SR501-EXP 1 Zone Switching Relay SR503-EXP 3 Zone Switching Relay with Priority and 3 PowerPorts SR504-EXP 4 Zone Switching Relay with Priority and 3 PowerPorts SR506-EXP 6 Zone Switching Relay with Priority and 3 PowerPorts Zone Valve Controls Product No. ZVC403 ZVC404 ZVC405 ZVC406 Description 3 Zone Valve 4 Zone Valve 5 Zone Valve 6 Zone Valve Control Control with Priority Control Control with Priority Zone Valve Controls with PowerPort Options and Expandable to 20 Zones Product No. Description ZVC404-EXP 4 Zone Valve Control with Priority and 2 PowerPorts ZVC406-EXP 6 Zone Valve Control with Priority and 2 PowerPorts Plug-In PowerPort Cards (For use with all -EXP controls) Product No. Description PC600 Post Purge Timer Plug-In Card PC605 Priority Protection Plug-In Card PC610 Universal Timer/Pump Exercise Plug-In Card Add-On Power Controls (For use with all -EXP controls) Product No. Description PC700 Boiler Reset Control PC702 2-Stage Boiler Reset Control PC705 Variable Speed Pump Injection Mixing Control Fan Controls Product No. HAFC101 HAFC201 Description Hydro Air Fan Control Hydro Air Fan Control with Optional Time Delays Do it once. Do it right. TO: 120 VAC POWER JUMPER CIRCULATOR TO: TT ON BOILER TO: ZC CIRCULATOR Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. TO: 120 VAC POWER TO: ZR 4 4 6 6 5 N H 3 N/O N/C N/C N/O 4 4 6 6 5 N H 3 N/O N/C N/C N/O T STAT 120 VAC INPUT POWER T STAT 24 R W VAC T T COM POWER SR501 1 ZONE SWITCHING RELAY T T 24 R W VAC T T COM THERMOSTAT THERMOSTAT ALTERNATIVE WIRING (TANKLESS COIL) SR501 Switching Relay Wiring 120 VAC INPUT SR501 1 ZONE SWITCHING RELAY TYPICAL WIRING (COLD START) 2 TO: 120 VAC POWER REMOVE JUMPER. DO NOT CONNECT POWER TO N AND H TERMINALS. N H 24 R W VAC T T COM T STAT * POWER * 24 VAC SIGNAL * T STAT LIGHT WILL GO ON AND OFF WITH 24 VAC SIGNAL. POWER LIGHT WILL ALWAYS BE OFF. CIRCULATOR TO: TT ON BOILER 4 4 6 6 5 N H 3 N/O N/C N/C N/O SR501 1 ZONE SWITCHING RELAY ALTERNATIVE WIRING (24 VAC POWERED INPUT SIGNAL) NOTE: No tankless coil priority. 3 (cont.) L1 (HOT) L2 THERMOSTATS (NEUTRAL) CIRCUIT BREAKER THERMOSTAT ZONE 4 PRIORITY ON OFF SR 504 ZONE 1 ZONE 2 ZONE 3 ZONE 4 CUSTOMER EMERGENCY SWITCH FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY L1 POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 THERMAL FUSE (FIROMATIC) 120V RELAY 24 VAC POWER X X ZC ZR END SWITCH SERVICE SWITCH ZONE1 ZONE2 ZONE3 T L2 T HONEYWELL L8124 OR EQUAL C1 B2 ZC C2 ZR B1 ZONE4 POWER 120 VOLT CIRCULATORS CIRCULATOR ON BOILER (IF ATTACHED) INPUT FUSE 1 AMP LINE VOLTAGE OIL BURNER RELAY LOW WATER CUTOFF 120 VAC INPUT NOTE: Tankless coil has priority. L1 (HOT) L2 THERMOSTAT (NEUTRAL) CIRCUIT BREAKER THERMOSTAT 24 VAC POWER SR 503 ZONE 1 ZONE 2 CUSTOMER EMERGENCY SWITCH ZONE 3 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP L1 THERMAL FUSE (FIROMATIC) L2 C1 B2 N SERVICE SWITCH P ZC H X2 X1 ZR ZONE1 ZONE2 C2 ZONE3 120 VOLT CIRCULATORS CIRCULATOR ON BOILER (IF ATTACHED) LINE VOLTAGE OIL BURNER RELAY LOW WATER CUTOFF 120 VAC INPUT NOTE: The boiler operating control’s ZC terminal will see the load of the circulator(s). 4 T T HONEYWELL L8124 OR EQUAL POWER ZONE 1 ZONE 2 ZONE 3 ZC ZR B1 SR502/503 Switching Relay Controlling Another SR502/503 Switching Relay AQUASTAT ON DHW HEATER A T T ZONE1 ZONE2 ZONE3 MASTER 24 VAC POWER PRIORITY ON VIA JUMPER PLACEMENT SR 503 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP POWER ZONE 1 ZONE 2 ZONE 3 N P ZC H X2 X1 ZR ZONE1 ZONE2 ZONE3 JUMPER 120 VOLT CIRCULATORS N 120 VAC POWER H DHW HEATER CIRCULATOR T T T ZONE1 ZONE2 ZONE3 PRIORITY OFF VIA JUMPER PLACEMENT SLAVE 24 VAC POWER SR 503 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP N P ZC H POWER ZONE 1 ZONE 2 ZONE 3 X2 X1 ZR ZONE1 ZONE2 ZONE3 JUMPER BOILER 120 VOLT CIRCULATORS TO: "TT" ON AQUASTAT CONTROL 5 SR502/503 Switching Relay Controlling Another SR504/506 Switching Relay AQUASTAT ON DHW HEATER T A T MASTER PRIORITY ON VIA JUMPER PLACEMENT 24 VAC POWER SR 503 ZONE1 ZONE2 ZONE3 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP POWER ZONE 1 ZONE 2 ZONE 3 N P ZC H X2 X1 ZR ZONE1 ZONE2 ZONE3 JUMPERS 120 VOLT CIRCULATORS THERMOSTATS T SLAVE SR 506 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 ZONE 6 PRIORITY ON SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY 24 VAC POWER X X END SWITCH PRIORITY OFF OFF POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP REMOVE JUMPER TO: "TT" ON BOILER BOILER 6 120 VAC INPUT H N Two SR504/506 Switching Relays Connected Together AQUASTAT ON DHW HEATER A T T T ZONE 4 PRIORITY ON OFF SR 504 PRIORITY ON ZONE 1 ZONE 2 ZONE 3 ZONE 4 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY 24 VAC POWER X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER INPUT 120 VOLT CIRCULATORS FUSE 1 AMP 120 VAC INPUT JUMPER DHW HEATER CIRCULATOR T BOILER SR 504 T T ZONE 4 PRIORITY ON OFF PRIORITY ON ZONE 1 ZONE 2 ZONE 3 ZONE 4 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY 24 VAC POWER X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP H 120 VAC INPUT JUMPER N TO: "TT" ON BOILER OUTPUT NOT USED 7 Priority Zoning Circulator Controlling SR504/506 Switching Relay MASTER PRIORITY ON PRIORITY ZONING CIRCULATOR PRIORITY OFF THERMOSTAT 2 1 BOILER 4 3 ON PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT 120 VAC INPUT A AQUASTAT ON DHW HEATER THERMOSTATS T PRIORITY OFF SLAVE SR 506 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 ZONE 6 PRIORITY ON SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY 24 VAC POWER X X END SWITCH OFF POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP REMOVE JUMPER TO: "TT" ON BOILER BOILER 8 120 VAC INPUT H N 9 BOILER FUSE 1 AMP SLAVE 24 VAC POWER X A T T ZONE 4 PRIORITY ON OFF INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE3 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T ZONE1 ZONE2 TO: "TT" ON BOILER REMOVE JUMPER ZC ZR END SWITCH X 120V RELAY SR 504 T AQUASTAT ON DHW HEATER POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY OFF THERMOSTAT 2 1 BOILER 4 3 FUSE 1 AMP SLAVE PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT OFF ON X X T T T ZONE3 ZONE 4 PRIORITY ON OFF INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T PRIORITY ON REMOVE JUMPER ZC ZR END SWITCH 120V RELAY SR 504 120 VAC INPUT PRIORITY PRIORITY ZONING CIRCULATOR MASTER Priority Zoning Circulator Controlling 2 SR504/506 Switching Relays 24 VAC POWER 120 VAC INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY OFF N H BOILER FUSE 1 AMP SLAVE 24 VAC POWER X REMOVE JUMPER ZC ZR T T ZONE 4 PRIORITY ON OFF INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE3 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T ZONE1 ZONE2 TO: "TT" ON BOILER END SWITCH X 120V RELAY SR 504 T 24 VAC POWER POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 JUMPER A ZONE2 T ZONE3 T ZONE3 FUSE 1 AMP SLAVE X2 X1 ZR ZONE1 ZONE2 TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE1 N P ZC H FUSE 1 AMP SR 503 PRIORITY OFF MASTER AQUASTAT ON DHW HEATER X X END SWITCH 120V RELAY REMOVE JUMPER ZC ZR SR 504 POWER ZONE 1 ZONE 2 ZONE 3 PRIORITY ON T T T ZONE3 ZONE 4 PRIORITY ON OFF 120 VAC INPUT INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T SR502/503 Switching Relay Controlling 2 SR504/506 Switching Relays 24 VAC POWER 10 N H POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY OFF 11 BOILER 24 VAC POWER FUSE 1 AMP SLAVE X TO: "TT" ON BOILER REMOVE JUMPER ZC ZR END SWITCH X 120V RELAY SR 504 T T T ZONE3 JUMPER 4 4 6 6 5 N H 3 N/O N/C N/C N/O ZONE 4 PRIORITY ON OFF INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY OFF DHW CIRCULATOR ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T FUSE 1 AMP SLAVE 120 VAC INPUT T STAT POWER 24 VAC POWER DHW HEATER AQUASTAT ON 24 R W VAC T T COM 1 ZONE SWITCHING RELAY SR501 MASTER A X X REMOVE JUMPER ZC ZR END SWITCH 120V RELAY SR 504 T T T ZONE3 120 VAC INPUT INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY OFF ZONE 4 PRIORITY ON OFF ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T SR501 Switching Relay Controlling 2 SR504/506 Switching Relays H N SR501-EXP Switching Relay Controlling Another SR504/506 Switching Relay AQUASTAT ON DHW HEATER TO: "TT" ON BOILER A TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE MASTER MODE POWER CONTROLS RESET END SWITCH NORMAL EXPANSION X X 1 2 3 4 SLAVE FUSE 1 AMP THERMOSTAT ZONE VALVE T/R T/W COM 1 2 SR 501-EXP MASTER POWER T STAT FUSE 5 AMP N H ZC ZR H POWER INPUT H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT DHW CIRCULATOR JUMPER T THERMOSTATS SLAVE SR 506 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 ZONE 6 PRIORITY ON SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY 24 VAC X POWER X END SWITCH PRIORITY OFF OFF POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP REMOVE JUMPER TO: "TT" ON BOILER BOILER 12 120 VAC INPUT H N MODE H N MASTER SLAVE NORMAL RESET BOILER 120 VAC INPUT FUSE 1 AMP POWER CONTROLS TO BOILER AQUASTAT RELAY EXPANSION 1 2 ZONE VALVE H 24 VAC SLAVE SYSTEM PUMP TURNS ON WHEN ANY ZONE VALVE OPENS EXCEPT WHEN THE DHW HEATER (SR501-EXP) CALLS. SYSTEM PUMP 24 VAC TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK WHITE DHW HEATER CIRCULATOR T STAT POWER TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. JUMPER 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT H ZC ZR H FUSE 5 AMP POWER INPUT N T/R T/W COM THERMOSTAT SR 501-EXP X X 1 2 3 4 END SWITCH A FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER AQUASTAT ON DHW HEATER EXTRA MAIN END END SWITCH SWITCH POWER IN MASTER MODE NORMAL RESET JUMPER 3&4 ZONE 1 1 2 3 4 2 WIRE ZONE VALVE (NO END SWITCH) N/O COM N/C ZONE 6 RELAY T T ZONE 1 T T ZONE 4 ZVC 406 T T ZONE 3 T T ZONE 5 T 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 PRIORITY ZONE SEE NOTE VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. JUMPER 3&4 ZONE 6 1 2 3 4 ON OFF ZONE 6 PRIORITY T T ZONE 6 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 T T 24 VAC THERMOSTAT THERMOSTAT THERMOSTAT SR501-EXP Switching Relay Controlling a ZVC404/406 Zone Valve Control FUSE (7 AMP MAX) 13 2 Expandable Switching Relays Connected Together SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off THERMOSTATS T SLAVE SLAVE PLUG-IN CARDS MASTER EXPANSION POWER CONTROL INTERFACE ZONE 4 PRIORITY ON OFF 1 2 3 4 ZONE 1 ZONE 2 ZONE 3 ZONE 4 SR504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC 120V RELAY SR 504-EXP POWER X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP 120 VAC INPUT JUMPER SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On THERMOSTATS T MASTER PLUG-IN CARDS SLAVE POWER CONTROL INTERFACE A MASTER 1 2 3 4 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 EXPANSION RESET 24 VAC NORMAL X X END SWITCH ZC ZR ZONE 6 PRIORITY ON OFF SR 506-EXP SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 120V RELAY POWER AQUASTAT ON DHW HEATER ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP H JUMPER N TO: "TT" ON BOILER BOILER 14 120 VAC INPUT DHW CIRCULATOR 15 FUSE 1 AMP BOILER 24 VAC POWER SLAVE X TO: "TT" ON BOILER JUMPER ZC ZR END SWITCH X 120V RELAY SR 504 T T ZONE3 ZONE NOT USED 24 VAC POWER ZONE 4 PRIORITY ON OFF INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T MASTER POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY ON JUMPERS A ZONE2 A ZONE3 POWER 24 V AC ZONE3 FUSE 1 AMP SLAVE X2 X1 ZR ZONE1 ZONE2 TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE1 N P ZC H FUSE 1 AMP SR 502 AQUASTATS ON DHW HEATERS X X JUMPER ZC ZR END SWITCH 120V RELAY SR 504 POWER ZONE 1 ZONE 2 PRIORITY OFF T T ZONE3 ZONE 4 PRIORITY ON OFF ZONE NOT USED 120 VAC INPUT INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 ZONE 4 T 2 Indirect Water Heaters with Priority Connected to Standard Switching Relays N H POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 PRIORITY ON 16 SWITCH SETTINGS BOILER 24 VAC POWER POWER CONTROL INTERFACE SLAVE 1 2 3 4 X TO: "TT" ON BOILER JUMPER ZC ZR END SWITCH X 120V RELAY SR 504-EXP ZONE 4 PRIORITY ON OFF MASTER ZONE NOT USED INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE3 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY SR504-EXP ZONE 1 ZONE 2 ZONE 3 ZONE 4 T ZONE1 ZONE2 PLUG-IN CARDS RESET NORMAL EXPANSION FUSE 1 AMP MASTER Master/Slave: Master Reset/Normal: Normal Priority Zone: On 24 VAC POWER POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 JUMPERS ZONE2 A ZONE3 AQUASTATS ON DHW HEATERS 24 VAC POWER POWER CONTROL INTERFACE SLAVE FUSE 1 AMP X END SWITCH X 120V RELAY JUMPER ZC ZR RESET NORMAL EXPANSION SWITCH SETTINGS SR504-EXP SR 504-EXP 120 VAC INPUT INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE3 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE 4 PRIORITY ON OFF SLAVE N H POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off ZONE 1 ZONE 2 ZONE 3 ZONE 4 T ZONE1 ZONE2 PLUG-IN CARDS POWER ZONE 1 ZONE 2 PRIORITY OFF 1 2 3 4 DHW CIRCULATORS ZONE3 MASTER X2 X1 ZR ZONE1 ZONE2 TWO ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE1 N P ZC H FUSE 1 AMP SR 502 A 2 Indirect Water Heaters with Priority Connected to EXP Switching Relays PC700 Boiler Reset Control Connected to SR501-EXP Switching Relay OUTDOOR SENSOR SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset PC700 THERMOSTAT TO: "TT" ON BOILER BOIL OUT SEN SEN T ZONE CONTROL TO: OPTIONAL ZONE VALVE OR iSeries MIXING VALVE BOILER SENSOR POWER CONTROLS MODE RESET NORMAL SLAVE END SWITCH EXPANSION X X 1 2 3 4 FUSE 1 AMP THERMOSTAT ZONE VALVE T/R T/W COM 1 2 SR 501-EXP MASTER POWER T STAT FUSE 5 AMP N H ZC ZR H POWER INPUT H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT BOILER JUMPER H 120 VAC INPUT SYSTEM CIRCULATOR N 17 SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Switching Relay OUTDOOR SENSOR AQUASTAT ON DHW HEATER A Note: If Zone Control comes on without a call for heat, reverse Reset Override input (1 & 2) wires on SR501-EXP. TO: "TT" ON BOILER PC700 BOIL OUT SEN SEN EXISTING ZONE CONTROL POWER CONTROLS ZONE CONTROL END SWITCH EXPANSION X X 1 2 3 4 K1-A BOILER SENSOR FUSE 1 AMP THERMOSTAT RESET OVERRIDE T/R T/W COM 1 2 THERMOSTATS T MODE RESET ZONE 4 PRIORITY ON OFF SR 504 ZONE1 ZONE2 ZONE3 ZONE4 MASTER SR 501-EXP SLAVE K1 NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER T STAT K2 FUSE 5 AMP K2-A H ZC ZR H POWER INPUT 24 VAC POWER 120V RELAY K1-B N POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 K2-A H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP JUMPER MASTER JUMPER PRIMARY SYSTEM CIRCULATOR (Optional) BOILER DHW HEATER CIRCULATOR 120 VAC INPUT H N Connecting a DHW Heater to an Existing Heating Only Switching Relay Using an SR501-EXP and PC700 Boiler Reset Control OUTDOOR SENSOR A AQUASTAT ON DHW HEATER TO: "TT" ON BOILER T PC700 BOIL OUT SEN SEN MASTER EXISTING ZONE CONTROL POWER CONTROLS ZONE CONTROL END SWITCH EXPANSION X X 1 2 3 4 BOILER SENSOR K1-A FUSE 1 AMP THERMOSTAT RESET OVERRIDE T/R T/W COM 1 2 SLAVE MODE RESET SR 504 ZONE1 ZONE2 ZONE3 ZONE4 MASTER SR 501-EXP SLAVE K1 NORMAL K2-A K2-A H 24 VAC POWER 120V RELAY H ZC ZR H POWER INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 POWER T STAT K2 K1-B N ZONE 4 PRIORITY ON OFF FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 5 AMP 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP JUMPER BOILER THERMOSTATS DHW HEATER CIRCULATOR REMOVE JUMPER 120 VAC INPUT H N 18 SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control OUTDOOR SENSOR AQUASTAT ON DHW HEATER A Note: If Zone Control comes on without a call for heat, reverse Reset Override input (1 & 2) wires on SR501-EXP. TO: "TT" ON BOILER PC700 BOIL OUT SEN SEN 120 VAC INPUT POWER CONTROLS ZONE CONTROL BLACK END SWITCH EXPANSION X X 1 2 3 4 K1-A BOILER SENSOR MASTER RESET OVERRIDE T/R T/W COM 1 2 SR 501-EXP SLAVE K1 T EXISTING ZONE CONTROL 24 VAC T T 24 VAC ZONE 4 PRIORITY MODE MODE NORMAL RESET RESET OFF T T ZONE 1 POWER IN T T ZONE 2 T T ZONE 3 ON T T ZONE 4 T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER NORMAL FUSE (3 AMP MAX) FUSE 1 AMP THERMOSTAT FACTORY INSTALLED TRANSFORMER THERMOSTATS WHITE POWER T STAT K2 ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH K1-B N K2-A H ZC ZR H POWER INPUT ZONE 1 1 2 3 4 N/O COM N/C ZONE 4 RELAY ZONE 2 1 2 3 4 ZONE 4 1 2 3 4 ZONE 3 1 2 3 4 K2-A H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) JUMPER TACO 3 WIRE ZONE VALVE END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE VALVE SYSTEM CIRCULATOR PRIMARY SYSTEM CIRCULATOR (Optional) BOILER MOTOR Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. DHW HEATER CIRCULATOR H N 120 VAC INPUT Connecting a DHW Heater to an Existing Heating Only Zone Valve Control Using an SR501-EXP and PC700 Boiler Reset Control OUTDOOR SENSOR A AQUASTAT ON DHW HEATER TO: "TT" ON BOILER PC700 BOIL OUT SEN SEN WHITE MASTER 120 VAC INPUT POWER CONTROLS ZONE CONTROL BLACK END SWITCH RESET THERMOSTAT OVERRIDE EXPANSION X X 1 2 3 4 K1-A BOILER SENSOR MASTER T/R T/W COM SLAVE K1 T EXISTING ZONE CONTROL T T SLAVE 24 VAC ZONE 4 PRIORITY MODE MODE NORMAL RESET RESET OFF 1 2 SR 501-EXP 24 VAC T T ZONE 1 POWER IN T T ZONE 2 T T ZONE 3 T T ZONE 4 NORMAL FUSE (3 AMP MAX) FUSE 1 AMP FACTORY INSTALLED TRANSFORMER THERMOSTATS POWER T STAT K2 ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH K1-B N K2-A H ZC ZR H POWER INPUT N/O COM N/C ZONE 4 RELAY ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ON T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER K2-A H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) JUMPER DHW HEATER CIRCULATOR BOILER TACO 3 WIRE ZONE VALVE MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ZONE VALVE SYSTEM CIRCULATOR H N 120 VAC INPUT 19 SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Tankless Coil Boiler – Zoning with Circulators OUTDOOR SENSOR THERMOSTATS T EXISTING ZONE CONTROL POWER CONTROLS END SWITCH PC700 EXPANSION X X 1 2 3 4 RESET OVERRIDE T/R T/W COM 1 2 MODE RESET ZONE 4 PRIORITY ON OFF SR 504 ZONE1 ZONE2 ZONE3 ZONE4 K1-A MASTER FUSE 1 AMP ZONE CONTROL SR 501-EXP SLAVE BOILER SENSOR K1 NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY K1-B N K2-A H ZC ZR H POWER INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 POWER T STAT K2 FUSE 5 AMP 24 VAC POWER BOIL OUT SEN SEN THERMOSTAT K2-A H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP JUMPER PRIMARY SYSTEM CIRCULATOR (Optional) REMOVE JUMPER TO: "ZR" ON BOILER CONTROL 120 VAC INPUT TO: "ZC" ON BOILER CONTROL H BOILER N Boiler and Zone Control(s) need to be on same power supply (same circuit breaker). SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Tankless Coil Boiler – Zoning with Zone Valves OUTDOOR SENSOR MASTER BLACK POWER CONTROLS PC700 END SWITCH BOIL OUT SEN SEN EXPANSION X X 1 2 3 4 ZONE CONTROL K1-A BOILER SENSOR T/R T/W COM SLAVE K1 T EXISTING ZONE CONTROL T T SLAVE 24 VAC ZONE 4 PRIORITY MODE MODE NORMAL RESET RESET OFF 1 2 SR 501-EXP 24 VAC T T ZONE 1 POWER IN T T ZONE 2 T T ZONE 3 T T ZONE 4 NORMAL FUSE (3 AMP MAX) FUSE 1 AMP MASTER RESET THERMOSTAT OVERRIDE FACTORY INSTALLED TRANSFORMER THERMOSTATS WHITE 120 VAC INPUT POWER T STAT K2 ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 5 AMP EXTRA MAIN END END SWITCH SWITCH K1-B N K2-A H ZC ZR H N/O COM N/C ZONE 4 RELAY ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ON T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 POWER K2-A H POWER 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT INPUT JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE 1 2 3 TACO 2 WIRE ZONE VALVE (NO END SWITCH) 3 WIRE ZONE VALVE JUMPER PRIMARY SYSTEM CIRCULATOR (Optional) TO: "ZR" ON BOILER CONTROL ZONE VALVE SYSTEM CIRCULATOR MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. TO: "ZC" ON BOILER CONTROL BOILER H N 120 VAC INPUT Boiler and Zone Control(s) need to be on same power supply (same circuit breaker). 20 21 OUTDOOR SENSOR ZONE CONTROL BOILER BOILER SENSOR BOIL OUT SEN SEN PC700 24 VAC POWER POWER CONTROL INTERFACE FUSE 1 AMP MASTER 1234 X JUMPER ZC ZR END SWITCH X 120V RELAY RESET NORMAL PLUG-IN CARDS TO: "TT" ON BOILER SLAVE Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off SWITCH SETTINGS ZONE3 INPUT N H POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120 VAC INPUT ZONE 4 PRIORITY ON OFF ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY SR 504-EXP ZONE 1 ZONE 2 ZONE 3 ZONE 4 T THERMOSTATS PC700 Boiler Reset Control Connected to EXP Switching Relay 22 BOILER #2 BOILER #1 BOILER SENSOR STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL PC702 DHW DEMAND OUTDOOR SENSOR 1234 FUSE 1 AMP MASTER WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW POWER 24 VAC POWER CONTROL INTERFACE SLAVE X JUMPER ZC ZR END SWITCH X 120V RELAY RESET NORMAL PLUG-IN CARDS SYSTEM CIRCULATOR (OPTIONAL) Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off SWITCH SETTINGS ZONE3 INPUT N H POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120 VAC INPUT ZONE 4 PRIORITY ON OFF ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY SR 504-EXP ZONE 1 ZONE 2 ZONE 3 ZONE 4 T THERMOSTATS PC702 2–Stage Boiler Reset Control Connected to EXP Switching Relay 23 OUTDOOR SENSOR ZONE CONTROL BOILER BOILER SENSOR SUPPLY SENSOR BOIL SUP OUT SEN SEN SEN PC705-2 BLACK BLUE RED FUSE 1 AMP MASTER 1234 X SYSTEM CIRCULATOR AND/OR BOILER (SEE NOTE A) END SWITCH X 120V RELAY JUMPER ZC ZR RESET NORMAL PLUG-IN CARDS TO: "TT" ON BOILER SLAVE 24 VAC POWER INJECTION CIRCULATOR SYSTEM CIRCULATOR AND/OR BOILER (SEE NOTE B) Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off ZONE3 INPUT NOTE B: WHEN SYSTEM CIRCULATOR IS CONNECTED TO RED WIRE ON PC705-2, THE CIRCULATOR WILL OPERATE ONLY WHEN THERMOSTAT CALLS FOR HEAT AND THE OUTDOOR TEMPERATURE IS BELOW THE WARM WEATHER SHUT DOWN (WWSD) TEMPERATURE. THE WWSD CAN BE ADJUSTED OR TURNED OFF SO THAT THE CIRCULATOR IS NOT AFFECTED BY OUTDOOR TEMPERATURE. H N POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120 VAC INPUT ZONE 4 PRIORITY ON OFF ZONE4 POWER 120 VOLT CIRCULATORS ZONE1 ZONE2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY SR 504-EXP ZONE 1 ZONE 2 ZONE 3 ZONE 4 T THERMOSTATS NOTE A: WHEN SYSTEM CIRCULATOR IS CONNECTED TO ZR TERMINAL ON SWITCHING RELAY, THE MODE SWITCH MUST BE SET TO NORMAL. THE PC705-2 WILL NOT RESET THE BOILER WHEN IN THE NORMAL MODE. GREEN/GROUND SWITCH SETTINGS PC705 Variable Speed Pump Injection Control Connected to EXP Switching Relay PC700 Boiler Reset Control Connected to 2 EXP Switching Relays OUTDOOR SENSOR SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off PC700 T SLAVE MASTER PLUG-IN CARDS ZONE 4 PRIORITY ON OFF 1 2 3 4 MASTER ZONE CONTROL BOIL OUT SEN SEN THERMOSTATS EXPANSION POWER CONTROL INTERFACE ZONE 1 ZONE 2 ZONE 3 ZONE 4 SR 504-EXP BOILER SENSOR FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC 120V RELAY POWER X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP TO: "TT" ON BOILER JUMPER 120 VAC INPUT BOILER SWITCH SETTINGS THERMOSTATS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority T SLAVE MASTER POWER CONTROL INTERFACE SLAVE PLUG-IN CARDS 1 2 3 4 EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP RESET NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY 24 VAC POWER X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP H JUMPER N 120 VAC INPUT SYSTEM CIRCULATOR (OPTIONAL) 24 PC702 2–Stage Boiler Reset Control Connected to 2 EXP Switching Relays OUTDOOR SENSOR SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off DHW DEMAND THERMOSTATS T MASTER PC702 SLAVE STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL PLUG-IN CARDS ZONE 4 PRIORITY ON OFF 1 2 3 4 MASTER EXPANSION POWER CONTROL INTERFACE ZONE 1 ZONE 2 ZONE 3 ZONE 4 SR 504-EXP BOILER SENSOR FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC 120V RELAY POWER X BOILER #1 X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP 120 VAC INPUT JUMPER BOILER #2 WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority THERMOSTATS T SLAVE PLUG-IN CARDS MASTER POWER CONTROL INTERFACE SLAVE 1 2 3 4 EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP RESET NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER 120V RELAY X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP H JUMPER N 120 VAC INPUT SYSTEM CIRCULATOR (OPTIONAL) 25 PC705 Variable Speed Pump Injection Control Connected to 2 EXP Switching Relays SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off OUTDOOR SENSOR THERMOSTATS T MASTER GREEN/GROUND (SEE NOTE B ON PAGE 23) SLAVE PLUG-IN CARDS 1 2 3 4 MASTER RED EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 SYSTEM CIRCULATOR BLUE SR 504-EXP PC705-2 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL BOIL SUP OUT SEN SEN SEN ZONE CONTROL BLACK ZONE 4 PRIORITY ON OFF INJECTION CIRCULATOR POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 SUPPLY SENSOR 24 VAC POWER BOILER SENSOR 120V RELAY X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 POWER INPUT 120 VOLT CIRCULATORS FUSE 1 AMP JUMPER TO: "TT" ON BOILER 120 VAC INPUT BOILER SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority THERMOSTATS T SLAVE SLAVE PLUG-IN CARDS MASTER POWER CONTROL INTERFACE 1 2 3 4 EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP RESET NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER 120V RELAY X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP H JUMPER N 120 VAC INPUT SYSTEM CIRCULATOR (OPTIONAL) (SEE NOTE A ON PAGE 23) 26 PC700 and PC705 Controls Connected to 2 EXP Switching Relays OUTDOOR SENSOR SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off T SLAVE PC700 MASTER PLUG-IN CARDS 1 2 3 4 MASTER ZONE CONTROL BOIL OUT SEN SEN THERMOSTATS EXPANSION POWER CONTROL INTERFACE ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP BOILER SENSOR FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER 120V RELAY X X END SWITCH ZONE1 ZONE2 ZC ZR ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP 120 V AC INPUT JUMPER TO: "TT" ON BOILER BOILER SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR THERMOSTATS GREEN/GROUND T (SEE NOTE B ON PAGE 23) SLAVE RED BLUE SYSTEM CIRCULATOR PC705-2 BOIL SUP OUT SEN SEN SEN ZONE CONTROL BLACK SLAVE PLUG-IN CARDS MASTER 1 2 3 4 EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP INJECTION CIRCULATOR RESET NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 SUPPLY SENSOR BOILER SENSOR 24 VAC POWER 120V RELAY X X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP JUMPER SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 23) H N 120 VAC INPUT 27 PC702 and PC705 Controls Connected to 2 EXP Switching Relays SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off OUTDOOR SENSOR THERMOSTATS T MASTER DHW DEMAND SLAVE PC702 PLUG-IN CARDS 1 2 3 4 MASTER EXPANSION POWER CONTROL INTERFACE STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 4 PRIORITY ON OFF SR 504-EXP FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY RESET NORMAL BOILER SENSOR POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER 120V RELAY X X ZONE1 ZONE2 ZC ZR END SWITCH ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT BOILER #1 FUSE 1 AMP 120 VAC INPUT JUMPER BOILER #2 WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: No Priority OUTDOOR SENSOR THERMOSTATS T GREEN/GROUND (SEE NOTE B ON PAGE 23) SLAVE SLAVE PLUG-IN CARDS RED BLUE SYSTEM CIRCULATOR MASTER 1 2 3 4 EXPANSION ZONE 1 ZONE 2 ZONE 3 ZONE 4 PC705-2 BOIL SUP OUT SEN SEN SEN ZONE CONTROL BLACK ZONE 4 PRIORITY ON OFF SR 504-EXP INJECTION CIRCULATOR RESET NORMAL FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 SUPPLY SENSOR BOILER SENSOR 24 VAC POWER 120V RELAY X X ZC ZR END SWITCH ZONE1 ZONE2 ZONE3 ZONE4 POWER 120 VOLT CIRCULATORS INPUT FUSE 1 AMP JUMPER SYSTEM CIRCULATOR (OPTIONAL LOCATION) (SEE NOTE A ON PAGE 23) H N 120 VAC INPUT 28 BOILER H N 24 VAC 24 VAC FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER END SWITCH SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. SYSTEM PUMP TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK WHITE N/O COM N/C POWER IN T T ZONE 2 T T ZONE 4 ZVC 405 T T ZONE 3 T T ZONE 5 T THERMOSTAT 2 WIRE ZONE VALVE (NO END SWITCH) 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 FIVE ZONE ZONE VALVE CONTROL JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 T T 24 VAC THERMOSTAT THERMOSTAT ZVC403/405 with System Pump FUSE (5 AMP MAX) 29 VALVE 4 T STAT 5 VALVE 5 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 BOILER H N WHITE 24 VAC 24 VAC SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. SYSTEM PUMP TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER EXTRA MAIN END END SWITCH SWITCH DRY CONTACTS JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 2 WIRE ZONE VALVE (NO END SWITCH) N/O COM N/C ZONE 6 RELAY MODE NORMAL RESET ZVC 406 T T ZONE 4 T T ZONE 5 T THERMOSTAT 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 OFF VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 T STAT 2 VALVE 1 T STAT 1 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ON SEE NOTE AQUASTAT ON DHW HEATER ZONE 6 PRIORITY T T ZONE 6 A 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 T T ZONE 3 T T 24 VAC THERMOSTAT THERMOSTAT ZVC404/406 with System Pump POWER IN 30 FUSE (7 AMP MAX) BOILER H N WHITE 24 VAC 24 VAC FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER DHW PUMP EXTRA MAIN END END SWITCH SWITCH JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 T T ZONE 4 ZVC 406 T T ZONE 3 T T ZONE 5 T THERMOSTAT 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 AQUASTAT ON DHW HEATER PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 SEE NOTE VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ON OFF ZONE 6 PRIORITY T T ZONE 6 A 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 2 WIRE ZONE VALVE (NO END SWITCH) N/O COM N/C ZONE 6 RELAY MODE T T 24 VAC THERMOSTAT THERMOSTAT NORMAL RESET DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK POWER IN ZVC404/406 with Domestic Hot Water (DHW) Pump FUSE (7 AMP MAX) 31 BOILER H N WHITE 24 VAC 24 VAC EXTRA MAIN END END SWITCH SWITCH DHW PUMP DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 T T ZONE 4 ZVC 406 T T ZONE 3 T T ZONE 5 T THERMOSTAT 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 AQUASTAT ON DHW HEATER PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 SEE NOTE VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ON OFF ZONE 6 PRIORITY T T ZONE 6 A 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 2 WIRE ZONE VALVE (NO END SWITCH) N/O COM N/C ZONE 6 RELAY MODE NORMAL RESET T T 24 VAC THERMOSTAT THERMOSTAT SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. SYSTEM PUMP TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER ZVC404/406 with System and DHW Pumps POWER IN 32 FUSE (7 AMP MAX) BOILER H N WHITE 24 VAC 24 VAC FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER DHW PUMP EXTRA MAIN END END SWITCH SWITCH SECONDARY PUMP COMES ON WHEN ANY ZONE CALLS EXCEPT PRIORITY ZONE. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. T T ZONE 4 ZVC 406 T T ZONE 3 T T ZONE 5 T THERMOSTAT 1 2 3 ZONE 3 1 2 3 4 TACO 3 WIRE ZONE VALVE ZONE 2 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 AQUASTAT ON DHW HEATER PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 SEE NOTE VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ON OFF ZONE 6 PRIORITY T T ZONE 6 A 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 2 WIRE ZONE VALVE (NO END SWITCH) JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 SECONDARY PUMP N/O COM N/C ZONE 6 RELAY MODE NORMAL RESET T T 24 VAC THERMOSTAT THERMOSTAT SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. SYSTEM PUMP TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK POWER IN ZVC404/406 with System, DHW and Secondary Pumps FUSE (7 AMP MAX) 33 2 ZVC404/406 Connected Together with Priority THERMOSTAT THERMOSTAT THERMOSTAT T T T Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. N H FACTORY INSTALLED TRANSFORMER 24 VAC WHITE 120 VAC INPUT BLACK ZONE 4 PRIORITY MODE NORMAL RESET 24 VAC OFF PRIORITY ON ON T T ZONE 1 POWER IN T T ZONE 2 FUSE (3 AMP MAX) EXTRA MAIN END END SWITCH SWITCH T T ZONE 3 T T ZONE 4 T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 ZVC 404 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4 N/O COM N/C ZONE 4 RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4 TO BOILER AQUASTAT RELAY JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE 1 2 3 DRY CONTACTS MOTOR TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) THERMOSTAT THERMOSTAT THERMOSTAT T T T AQUASTAT ON DHW HEATER A WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER 24 VAC ZONE 4 PRIORITY MODE NORMAL RESET 24 VAC OFF ON T T ZONE 1 POWER IN FUSE (3 AMP MAX) EXTRA MAIN END END SWITCH SWITCH N/O COM N/C ZONE 4 RELAY T T ZONE 2 T T ZONE 3 ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 VALVE 3 T STAT 4 VALVE 4 POWER ZONE 4 1 2 3 4 JUMPER 3&4 PRIORITY ZONE 1 2 3 DRY CONTACTS 2 WIRE ZONE VALVE (NO END SWITCH) TACO 3 WIRE ZONE VALVE MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 ZVC 404 TO BOILER AQUASTAT RELAY 34 T T ZONE 4 FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY JUMPER 3&4 BOILER PRIORITY ON SEE NOTE 2 EXP Zone Valve Controls Connected Together with System Pump Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On T T 24 VAC SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE FACTORY INSTALLED TRANSFORMER MASTER 120 VAC INPUT BLACK AQUASTAT ON DHW HEATER A T T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 VALVE 6 POWER ON JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE TO BOILER AQUASTAT RELAY MOTOR 1 2 3 BOILER TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM PUMP END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) N H 120 VAC INPUT SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) TACO 3 WIRE ZONE VALVE MOTOR END SWITCH VALVE 6 POWER ON SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) 35 2 EXP Zone Valve Controls Connected Together with DHW Pump Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On T T 24 VAC SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE FACTORY INSTALLED TRANSFORMER MASTER 120 VAC INPUT BLACK AQUASTAT ON DHW HEATER A T T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 VALVE 6 POWER ON JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE MOTOR 1 2 3 BOILER TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) DHW PUMP END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) N H 120 VAC INPUT BOILER TURNS ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) 36 T T ZONE 4 ZVC 406-EXP FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE TACO 3 WIRE ZONE VALVE MOTOR END SWITCH PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) VALVE 6 POWER ON SEE NOTE 2 EXP Zone Valve Controls Connected Together with System and DHW Pumps Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On T T 24 VAC SLAVE 1 2 3 4 POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE FACTORY INSTALLED TRANSFORMER MASTER 120 VAC INPUT BLACK AQUASTAT ON DHW HEATER A T T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 VALVE 6 POWER ON JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE BOILER MOTOR 1 2 3 SYSTEM PUMP DHW PUMP TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) N H 120 VAC INPUT SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) TACO 3 WIRE ZONE VALVE MOTOR END SWITCH VALVE 6 POWER ON SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) 37 2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On T T 24 VAC SLAVE POWER CONTROLS TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK 24 VAC RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE FACTORY INSTALLED TRANSFORMER MASTER 120 VAC INPUT BLACK AQUASTAT ON DHW HEATER A T T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 VALVE 6 POWER ON JUMPER 3&4 JUMPER 3&4 SEE NOTE PRIORITY ZONE BOILER DHW PUMP MOTOR 1 2 3 SYSTEM PUMP SECONDARY PUMP TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) N H 120 VAC INPUT SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SECONDARY PUMP TURNS ON WHEN ANY ZONE CALLS, EXCEPT PRIORITY ZONE. SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) 38 T T ZONE 4 ZVC 406-EXP FUSE 7 AMP MAX 24 VAC MODE WHITE ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE TACO 3 WIRE ZONE VALVE MOTOR END SWITCH PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) VALVE 6 POWER ON SEE NOTE 39 BOILER OUTDOOR SENSOR ZONE CONTROL TACO, INC ZVC406-EXP END SWITCH B PUMP RESET NORMAL END SWITCH A BOILER SYSTEM CIRCULATOR DRY CONTACTS 1 2 3 4 JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 4 ZVC 406-EXP T T ZONE 3 T T ZONE 5 T THERMOSTAT TACO 3 WIRE ZONE VALVE 1 2 3 ZONE 3 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 OFF PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 T T ZONE 6 ZONE 6 PRIORITY ON 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 ZONE 2 1 2 3 4 T T ZONE 1 2 WIRE ZONE VALVE (NO END SWITCH) EXPANSION MASTER N/O COM N/C ZONE 6 RELAY MODE SLAVE POWER CONTROLS PLUG-IN CARDS T T 24 VAC THERMOSTAT THERMOSTAT SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. 24 VAC TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK 24 VAC BOILER SENSOR WHITE BOIL OUT SEN SEN Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off POWER IN PC700 FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER PC700 Boiler Reset Control Connected To EXP Zone Valve Control FUSE 7 AMP MAX N H SEE NOTE POWER ON VALVE 6 T STAT 6 VALVE 5 T STAT 5 VALVE 4 T STAT 4 VALVE 3 T STAT 3 VALVE 2 T STAT 2 VALVE 1 T STAT 1 INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT BOILER #2 BOILER #1 BOILER SENSOR STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL BLACK 120 VAC INPUT WHITE BLACK 120 VAC INPUT WHITE 24 VAC WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW N/O COM N/C ZONE 6 RELAY END SWITCH A BOILER DHW CIRCULATOR NORMAL SYSTEM CIRCULATOR 1 2 3 4 JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 4 ZVC 406-EXP T T ZONE 3 T T ZONE 5 T THERMOSTAT TACO 3 WIRE ZONE VALVE 1 2 3 ZONE 3 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 OFF PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 T T ZONE 6 ZONE 6 PRIORITY ON 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 ZONE 2 1 2 3 4 T T ZONE 1 2 WIRE ZONE VALVE (NO END SWITCH) EXPANSION MASTER PLUG-IN CARDS T T 24 VAC THERMOSTAT THERMOSTAT SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. END SWITCH B PUMP RESET MODE SLAVE POWER CONTROLS Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. TACO, INC ZVC406-EXP PC702 SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off 24 VAC DHW DEMAND FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER POWER IN OUTDOOR SENSOR PC702 2–Stage Boiler Reset Control Connected To EXP Zone Valve Control FUSE 7 AMP MAX 40 N H SEE NOTE POWER ON VALVE 6 T STAT 6 VALVE 5 T STAT 5 VALVE 4 T STAT 4 VALVE 3 T STAT 3 VALVE 2 T STAT 2 VALVE 1 T STAT 1 INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT 41 BOILER ZONE CONTROL WHITE BLACK 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK BOILER SENSOR SUPPLY SENSOR BOIL SUP OUT SEN SEN SEN PC705-2 BLUE RED TO BOILER AQUASTAT RELAY 24 VAC END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY NORMAL DRY CONTACTS 1 2 3 4 END SWITCH A BOILER JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 4 ZVC 406-EXP T T ZONE 3 T T ZONE 5 T THERMOSTAT TACO 3 WIRE ZONE VALVE 1 2 3 ZONE 3 1 2 3 4 MOTOR END SWITCH ZONE 5 1 2 3 4 OFF PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 T T ZONE 6 ZONE 6 PRIORITY ON 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) ZONE 4 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 ZONE 2 1 2 3 4 T T ZONE 1 2 WIRE ZONE VALVE (NO END SWITCH) EXPANSION MASTER SYSTEM CIRCULATOR (OPTIONAL LOCATION) RESET MODE SLAVE POWER CONTROLS T T 24 VAC THERMOSTAT Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. THERMOSTAT PLUG-IN CARDS SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. 24 VAC INJECTION CIRCULATOR (SEE NOTE B ON PAGE 23) SYSTEM CIRCULATOR TACO, INC ZVC406-EXP GREEN/GROUND FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER POWER IN OUTDOOR SENSOR PC705 Variable Speed Pump Injection Control Connected To EXP Zone Valve Control FUSE 7 AMP MAX N H SEE NOTE POWER ON VALVE 6 T STAT 6 VALVE 5 T STAT 5 VALVE 4 T STAT 4 VALVE 3 T STAT 3 VALVE 2 T STAT 2 VALVE 1 T STAT 1 INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT PC700 Boiler Reset Control Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT PC700 ZONE CONTROL T BOILER SENSOR T 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK ZONE 6 PRIORITY ON PLUG-IN CARDS 24 VAC SLAVE POWER CONTROLS RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER MODE WHITE T 24 VAC NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 T STAT 1 OFF VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER MASTER POWER IN BOIL OUT SEN SEN T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP ZONE 1 1 2 3 4 END SWITCH A BOILER N/O COM N/C ZONE 6 RELAY TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 MOTOR 1 2 3 BOILER DHW CIRCULATOR POWER ON JUMPER 3&4 JUMPER 3&4 SYSTEM CIRCULATOR VALVE 6 TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) SEE NOTE PRIORITY ZONE END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) H N SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T 120 VAC INPUT BLACK SLAVE POWER CONTROLS MODE 24 VAC RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 2 WIRE ZONE VALVE (NO END SWITCH) ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 42 T ZONE 6 PRIORITY ON FUSE 7 AMP MAX WHITE FACTORY INSTALLED TRANSFORMER BLACK POWER IN 120 VAC INPUT T 24 VAC PLUG-IN CARDS 24 VAC TACO, INC ZVC406-EXP WHITE FACTORY INSTALLED TRANSFORMER SLAVE TACO 3 WIRE ZONE VALVE MOTOR END SWITCH PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) VALVE 6 POWER ON SEE NOTE PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off DHW DEMAND PC702 WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL T BOILER SENSOR T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 ZONE 6 PRIORITY ON T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE T 24 VAC PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER MASTER T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 POWER ON JUMPER 3&4 JUMPER 3&4 BOILER #1 VALVE 6 SEE NOTE PRIORITY ZONE MOTOR 1 2 3 SYSTEM CIRCULATOR DHW CIRCULATOR TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) H N SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. BOILER #2 SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T SLAVE POWER CONTROLS 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 ZONE 6 PRIORITY ON T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE T 24 VAC PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 VALVE 6 POWER ON SEE NOTE PRIORITY ZONE 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) TACO 3 WIRE ZONE VALVE MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) 43 PC705 Variable Speed Pump Injection Control Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off GREEN/GROUND (SEE NOTE B ON PAGE 23) RED SYSTEM CIRCULATOR Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. BLUE PC705-2 INJECTION CIRCULATOR BLACK BOIL SUP OUT SEN SEN SEN INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT ZONE CONTROL T SUPPLY SENSOR T 24 VAC SLAVE POWER CONTROLS BLACK 24 VAC TACO, INC ZVC406-EXP WHITE FACTORY INSTALLED TRANSFORMER MODE RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX BLACK ZONE 6 PRIORITY ON PLUG-IN CARDS POWER IN FACTORY INSTALLED TRANSFORMER WHITE 120 VAC INPUT T 24 VAC MASTER BOILER SENSOR T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY ZONE 1 1 2 3 4 END SWITCH A BOILER ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 MOTOR 1 2 3 BOILER TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR (OPTIONAL LOCATION) VALVE 6 POWER ON JUMPER 3&4 JUMPER 3&4 DRY CONTACTS TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 END SWITCH SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) H N SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off T T 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER BLACK ZONE 6 PRIORITY ON PLUG-IN CARDS 24 VAC SLAVE POWER CONTROLS MODE WHITE RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 2 WIRE ZONE VALVE (NO END SWITCH) ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 44 T 24 VAC FUSE 7 AMP MAX 120 VAC INPUT BLACK POWER IN WHITE FACTORY INSTALLED TRANSFORMER SLAVE TACO 3 WIRE ZONE VALVE MOTOR END SWITCH PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) VALVE 6 POWER ON SEE NOTE PC700 and PC705 Connected To 2 EXP Zone Valve Controls OUTDOOR SENSOR Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. SWITCH SETTINGS Master/Slave: Master Reset/Normal: Reset Priority Zone: On or Off INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT PC700 ZONE CONTROL T BOILER SENSOR T 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK ZONE 6 PRIORITY ON PLUG-IN CARDS 24 VAC SLAVE POWER CONTROLS MODE WHITE T 24 VAC RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 T STAT 1 OFF VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER MASTER POWER IN BOIL OUT SEN SEN T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP ZONE 1 1 2 3 4 END SWITCH A BOILER N/O COM N/C ZONE 6 RELAY TO BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 POWER ON JUMPER 3&4 JUMPER 3&4 MOTOR 1 2 3 BOILER TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR VALVE 6 SEE NOTE PRIORITY ZONE END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) DHW CIRCULATOR H N OUTDOOR SENSOR SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. GREEN/GROUND (SEE NOTE B ON PAGE 23) SYSTEM CIRCULATOR RED BLUE PC705-2 BOIL SUP OUT SEN SEN SEN INJECTION CIRCULATOR ZONE CONTROL BLACK SUPPLY SENSOR BOILER SENSOR T T 120 VAC INPUT BLACK SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off ZONE 6 PRIORITY ON 24 VAC SLAVE POWER CONTROLS MODE 24 VAC RESET 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX WHITE FACTORY INSTALLED TRANSFORMER BLACK POWER IN 120 VAC INPUT T 24 VAC PLUG-IN CARDS TACO, INC ZVC406-EXP WHITE FACTORY INSTALLED TRANSFORMER SLAVE T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 JUMPER 3&4 JUMPER 3&4 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) ZONE 6 1 2 3 4 TACO 3 WIRE ZONE VALVE MOTOR END SWITCH VALVE 6 POWER ON SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) 45 PC702 and PC705 Connected To 2 EXP Zone Valve Controls SWITCH SETTINGS Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off OUTDOOR SENSOR DHW DEMAND PC702 Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. WIRING NEEDED ONLY IF PRIORITY ZONE IS DHW INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT STAGE STAGE BOIL OUT ZONE 1 2 SEN SEN CONTROL T BOILER SENSOR T SLAVE POWER CONTROLS 24 VAC FACTORY INSTALLED TRANSFORMER RESET TACO, INC ZVC406-EXP BOILER #1 120 VAC INPUT BLACK ZONE 6 PRIORITY ON 1 2 3 4 T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 T STAT 1 OFF VALVE 1 T STAT 2 ZVC 406-EXP VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY FUSE 7 AMP MAX 24 VAC MODE WHITE T 24 VAC PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER MASTER T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP ZONE 1 1 2 3 4 END SWITCH A BOILER N/O COM N/C ZONE 6 RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 MOTOR 1 2 3 SYSTEM CIRCULATOR DHW CIRCULATOR POWER ON JUMPER 3&4 JUMPER 3&4 BOILER #2 VALVE 6 TACO 3 WIRE ZONE VALVE 2 WIRE ZONE VALVE (NO END SWITCH) END SWITCH SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) H N OUTDOOR SENSOR SYSTEM CIRCULATOR AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. DHW CIRCULATOR TURNS ON ONLY WHEN PRIORITY ZONE CALLS. GREEN/GROUND (SEE NOTE B ON PAGE 23) RED SYSTEM CIRCULATOR BLUE PC705-2 INJECTION CIRCULATOR BLACK BOIL SUP OUT SEN SEN SEN ZONE CONTROL SUPPLY SENSOR BOILER SENSOR T T SLAVE POWER CONTROLS SWITCH SETTINGS Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off 24 VAC TACO, INC ZVC406-EXP FACTORY INSTALLED TRANSFORMER 120 VAC INPUT BLACK RESET 1 2 3 4 ZONE 6 PRIORITY ON T T ZONE 1 EXPANSION MASTER NORMAL T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 VALVE 2 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP N/O COM N/C ZONE 6 RELAY DRY CONTACTS END SWITCH A BOILER ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 PRIORITY ZONE 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) 46 T T ZONE 2 ZVC 406-EXP FUSE 7 AMP MAX 24 VAC MODE WHITE T 24 VAC PLUG-IN CARDS POWER IN WHITE 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER SLAVE TACO 3 WIRE ZONE VALVE MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) VALVE 6 POWER ON SEE NOTE HAFC101 with 1 Speed Air Handler THERMOSTAT T Optional Power Wire to Thermostat that Requires 24VAC To: Aquastat on Return Line of Hydro Coil C R W Y G T T THERMOSTAT AQUASTAT Power On Call for Heat Fan, Cooling Fan, Heating HAFC101 HYDRO AIR FAN CONTROL BOILER AIR HANDLER X X C R Y G G LOW HIGH Dry Contacts To: “T T” on Boiler or Switching Relay 24 VAC Jumper Line Fan Relay Outdoor Condenser Unit M HAFC 101 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.) 47 HAFC101 with 2 Speed Air Handler THERMOSTAT T To: Aquastat on Return Line of Hydro Coil Optional Power Wire to Thermostat that Requires 24VAC C R W Y G T T THERMOSTAT AQUASTAT Power On Call for Heat Fan, Cooling Fan, Heating HAFC101 HYDRO AIR FAN CONTROL BOILER AIR HANDLER X X C R Y G G Line Fan Relays High Low Dry Contacts To: “T T” on Boiler or Switching Relay 24 VAC LOW HIGH Outdoor Condenser Unit M HAFC 101 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.) 48 HAFC201 with 1 Speed Air Handler To: Optional Aquastat on Return Line of Hydro Coil THERMOSTAT T Optional Power Wire to Thermostat that Requires 24VAC To: Optional Aquastat or Thermostat to sense low ambient temperature C R W Y G T T T T THERMOSTAT WATER COIL FREEZE PR AQUASTATS Power On Call for Heat Fan, Cooling Fan, Heating HAFC201 HYDRO AIR FAN CONTROL OFF DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP ON NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position. 5 AMP 1/6 HP RATED PUMP BOILER AIR HANDLER XX X X C R Y G G LOW HIGH Jumper Hot Neutral 24 VAC (or to “T T” on switching relay) Fan Relay Dry Contacts To: “T T” on Boiler or Switching Relay Line Circulator Outdoor Condenser Unit M HAFC 201 WITH 1 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.) 49 HAFC201 with 2 Speed Air Handler To: Optional Aquastat on Return Line of Hydro Coil THERMOSTAT T Optional Power Wire to Thermostat that Requires 24VAC To: Optional Aquastat or Thermostat to sense low ambient temperature C R W Y G T T T T THERMOSTAT WATER COIL FREEZE PR AQUASTATS Power On Call for Heat Fan, Cooling Fan, Heating HAFC201 HYDRO AIR FAN CONTROL OFF DRY CONTACTS 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP ON NOTE: For 4 minute on delay of Heating Fan, switch 1 and 3 MIN ON DELAY to ON position. 5 AMP 1/6 HP RATED PUMP BOILER AIR HANDLER XX X X C R Y G G LOW HIGH Hot Line “T T” on Boiler or Switching Relay Low Circulator High 24 VAC (or to “T T” on switching relay) Fan Relays Neutral Outdoor Condenser Unit M HAFC 201 WITH 2 SPEED AIR HANDLER (Both HFC 101 and HAFC 201 are capable of 1 and 2 speed applications.) 50 51 OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC AQUASTAT AIR HANDLER LOW HIGH M BOILER TO: "TT" ON BOILER FUSE 1 AMP OUTDOOR CONDENSER UNIT POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING 24 VAC POWER 2 SPEED AIR HANDLER Low X X C R Y G G BOILER HAFC101 HYDRO AIR FAN CONTROL THERMOSTAT High X END SWITCH X 120V RELAY JUMPER ZC ZR SR 504 AQUASTAT BOILER HIGH M INPUT ZONE4 POWER 120 VOLT CIRCULATORS ZONE3 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 N H OUTDOOR CONDENSER UNIT 120 VAC INPUT ZONE 4 PRIORITY ON OFF 2 SPEED AIR HANDLER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE1 ZONE2 LOW AIR HANDLER X X C R Y G G POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING TO: AQUASTAT ON RETURN LINE OF HYDRO COIL HAFC101 HYDRO AIR FAN CONTROL THERMOSTAT C R W Y G T T T Low C R W Y G T T OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC High TO: AQUASTAT ON RETURN LINE OF HYDRO COIL Fan Relays T Fan Relays THERMOSTAT OPTIONAL POWER WIRE TO THERMOSTAT THAT REQUIRES 24VAC AQUASTAT BOILER LOW AIR HANDLER HIGH X X C R Y G G DHW HEATER AQUASTAT 2 SPEED AIR HANDLER M OUTDOOR CONDENSER UNIT POWER PM CALL FOR HEAT FAN, COOLING FAN, HEATING TO: AQUASTAT ON RETURN LINE OF HYDRO COIL HAFC101 HYDRO AIR FAN CONTROL THERMOSTAT C R W Y G T T T THERMOSTAT Low THERMOSTAT 24 VAC Line 24 VAC Line 24 VAC Line High Multiple HAFC’s and Switching Relay Fan Relays 3 Wire Thermostat Connected to TACO Switching Relay 3 WIRE THERMOSTAT T COM T W T T R ZONE 4 PRIORITY ON OFF SR 504 ZONE 1 ZONE 2 ZONE 3 ZONE 4 FOUR ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER 120V RELAY X X ZONE1 ZONE2 ZC ZR END SWITCH ZONE3 ZONE4 POWER INPUT 120 VOLT CIRCULATORS FUSE 1 AMP H 120 VAC INPUT JUMPER N TO: "TT" ON BOILER BOILER 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER WHITE THERMOSTAT THERMOSTAT T T T R RED W WH 24 VAC POWER IN 120 VAC INPUT BLACK THERMOSTAT C COMMON WHITE FACTORY INSTALLED TRANSFORMER 3 Wire Thermostat Connected to TACO Zone Valve Control T T ZONE 1 T T ZONE 2 T T ZONE 3 T T ZONE 4 T T ZONE 5 VALVE 1 T STAT 2 24 VAC ZVC 405 FIVE ZONE ZONE VALVE CONTROL ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 JUMPER 3&4 RED RED T T ZONE 1 1 2 3 4 BLACK BLACK END SWITCH TO T&T ON BOILER OR PUMP RELAY 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) 52 T STAT 1 3 WIRE ZONE VALVE (TACO TYPE) MOTOR END SWITCH 4 WIRE ZONE VALVE (HONEYWELL TYPE) VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 POWER 53 WHITE 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK END SWITCH TO T&T ON BOILER OR PUMP RELAY 24 VAC FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER T T 24 VAC POWER IN NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #2 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW T T ZONE 2 T T ZONE 4 ZVC 405 T T ZONE 3 T T ZONE 5 T THERMOSTAT 1 2 3 ZONE 3 1 2 3 4 3 WIRE ZONE VALVE (TACO TYPE) ZONE 2 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 FIVE ZONE ZONE VALVE CONTROL WHITE-ROGERS 1361 HYDRONIC ZONE VALVE 2 1 4 3 ZONE 1 1 2 3 4 T T ZONE 1 T T RIGHT TT SCREW (SEE NOTE) THERMOSTAT THERMOSTAT END SWITCH 4 WIRE ZONE VALVE (HONEYWELL TYPE) MOTOR BLACK BLACK VALVE 4 T STAT 5 VALVE 5 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 TERMINAL ASSIGNMENT ZONE VALVE CONTROL 1 1 2 TT (Rt) 3 3 4 2 White-Rogers 1361 Hydronic Zone Valve with TACO Zone Valve Control RED RED 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK WHITE END SWITCH TO T&T ON BOILER OR PUMP RELAY 24 VAC FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER T T 24 VAC POWER IN NOTE: WHEN USING ZVC 404 OR ZVC 406, CONNECT WIRE #3 OF ZONE VALVE TO PRIORITY ZONE RIGHT TT SCREW T T ZONE 4 ZVC 405 T T ZONE 3 T T ZONE 5 T THERMOSTAT 6 4 1 1 2 3 ZONE 3 1 2 3 4 3 WIRE ZONE VALVE (TACO TYPE) ZONE 2 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 FIVE ZONE ZONE VALVE CONTROL T T ZONE 2 HONEYWELL VC (SPST) HYDRONIC ZONE VALVE SERIES 40 & 80 3 2 ZONE 1 1 2 3 4 T T ZONE 1 T T RIGHT TT SCREW (SEE NOTE) THERMOSTAT THERMOSTAT END SWITCH 4 WIRE ZONE VALVE (HONEYWELL TYPE) MOTOR BLACK BLACK VALVE 4 T STAT 5 VALVE 5 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 TERMINAL ASSIGNMENT ZONE VALVE CONTROL ORANGE 1 3 BLUE 2 1 BROWN 3 TT (Rt) GRAY 4 4 BLACK 6 2 Honeywell VC 40 & 80 (spdt) Hydronic Zone Valve with TACO Zone Valve Control RED RED 54 570 Zone Valve to Switching Relay T THERMOSTAT 24 VAC TRANSFORMER 1 2 3 24 VAC POWER SR 503 ZONE1 ZONE2 ZONE3 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP N P ZC H POWER ZONE 1 ZONE 2 ZONE 3 X2 X1 ZR ZONE1 ZONE2 ZONE3 JUMPERS 120 VOLT CIRCULATORS TO: 120 VAC POWER (NEUTRAL) TO: 120 VAC POWER (HOT) TO: "TT" ON AQUASTAT CONTROL TO: "TT" ON AQUASTAT CONTROL 55 WHITE 24 VAC 24 VAC SYSTEM PUMP TO BOILER AQUASTAT RELAY 120 VAC INPUT BLACK WHITE 120 VAC INPUT BLACK SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS. BOILER H N FACTORY INSTALLED TRANSFORMER FACTORY INSTALLED TRANSFORMER EXTRA MAIN END END SWITCH SWITCH DRY CONTACTS N/O COM N/C ZONE 6 RELAY MODE NORMAL RESET END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) MOTOR JUMPER 3&4 ZONE 1 1 2 3 4 T T ZONE 1 ZVC 406 T T ZONE 4 T T ZONE 5 T THERMOSTAT ZONE 2 1 2 3 4 ZONE 4 1 2 3 4 END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) MOTOR ZONE 5 1 2 3 4 PRIORITY ZONE JUMPER 3&4 ZONE 6 1 2 3 4 OFF THERMOSTAT 2 1 BOILER 4 3 120 VAC INPUT PRIORITY POWER IN PR-IN PR-OUT LIVE NEUT OFF VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER VALVE 2 T STAT 3 VALVE 3 T STAT 4 VALVE 1 T STAT 2 T STAT 1 PRIORITY ON PRIORITY ON Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. ON SEE NOTE AQUASTAT ON DHW HEATER ZONE 6 PRIORITY T T ZONE 6 A PRIORITY ZONING CIRCULATOR TACO 3 WIRE ZONE VALVE 1 2 3 ZONE 3 1 2 3 4 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY T T ZONE 2 T T ZONE 3 T T 24 VAC THERMOSTAT THERMOSTAT Zone Valve Control with 1 Low Temperature Zone Using Priority Zoning Circulator POWER IN 56 FUSE (7 AMP MAX) Radiant Mixing Block (RMB) Back of Control Boiler Operation Off-Enable On-Control Front of Control R C US 158033 Meets Class B: Canadian ICES FCC Part 15 Boiler Power: 120 V + 10% 50/60 Hz, 750 VA Var. Speed: 120 V (ac) 1 A Pmp Relay: 120 V (ac) 5 A, 1/6 hp Use copper conductors only Sys Fuse Com Sup Sys Com Boil Out Com Heat Ret Dem Boiler MENU ITEM Y R B Pump H Man N Var RADIANT MIXING BLOCK PATENT PENDING UL Line Cord RMB-1 Supply Sensor Injection Circulator Boiler Sensor To Zone Control End Switch or Thermostat Outdoor Sensor Radiant Circulator Radiant Mixing Block, Single Zone Boiler RMB Boiler Operation Off-Enable On-Control Back of Control T Thermostat (Dry Contact) Pump ComSup Sys Com Boil Out Com Heat Dem Ret H H N N Power Input Outdoor Sensor N Boiler Sensor Supply Sensor High Mass Boiler FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 57 Radiant Mixing Block Connected to Zone Valve Control with System Pump Wired off the RMB N POWER IN Input Outdoor Sensor Boiler Boiler Operation Off-Enable On-Control RMB T T T ZONE 1 T T ZONE 2 E ND SWITCH THREE ZONE ZONE VALVE CONTROL ZONE 1 1 2 3 4 N/O COM N/C Pump Com Sup Sys Com Boil Out Com Heat Dem Ret T T ZONE 3 ZVC 403 FUSE (5 AMP MAX) Back of Control Thermostats T Factory Installed Transformer Power H ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 H M N End Switch Motor Motor End Switch N M Boiler Sensor Supply Sensor Radiant Mixing Block Connected to 2 EXP Switching Relays with DHW Pump T Thermostats A T Power Cord DHW Aquastat Outdoor Sensor T SLAVE MASTER 1 2 3 4 ZONE1 EXPANSION RESET NORMAL ZONE2 ZONE3 OFF Boiler POWER CONTROL INTERFACE SLAVE PLUG-IN CARDS MASTER THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY EXPANSION RMB X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 120 VOLT CIRCULATORS ZONE3 OFF THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY SR503-EXP On-Control Pump ComSup Sys Com Boil Out ComHeat Dem Ret X ZONE2 Back of Control SR503-EXP 24 VAC POWER ZONE1 RESET NORMAL Boiler Operation Off-Enable ZONE 3 PRIORITY ON 1 2 3 4 POWER CONTROL INTERFACE ZONE 3 PRIORITY ON PLUG-IN CARDS Thermostats T POWER INPUT X 24 VAC POWER H X END SWITCH ZC ZR ZONE1 ZONE2 ZONE3 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP N FUSE 1 AMP H N DHW Circ. N Boiler Sensor Supply Sensor FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 58 Power Input X - Pump Block (XPB) Back of Control Boiler Operation Off-Enable On-Control Front of Control R C US 158033 Meets Class B: Canadian ICES FCC Part 15 Boiler Power: 120 V + 10% 50/60 Hz, 750 VA Var. Speed: 120 V (ac) 1 A Pmp Relay: 120 V (ac) 5 A, 1/6 hp Use copper conductors only Fuse Manual Operation Switch Sys MENU ITEM Com Sup Sys Com Boil Out Com Heat Dem Ret Heat Source Y R B H X – PUMP BLOCK UL PATENT PENDING Pump Var XPB-1 Man N Line Cord System Supply Sensor Variable Speed Circulator Heat Source Sensor To Zone Control End Switch or Thermostat (Relay or Mechanical Type) Outdoor Sensor Heating: Heat Source Circulator Snowmelt: System Circulator Constant Speed Circulator Heating: System Circulator Snowmelt: Heat Source Circulator X - Pump Block, Single Zone Outdoor Sensor Power Cord Boiler XPB Boiler Operation Off-Enable On-Control Back of Control Thermostat (Relay or Mechanical Type) Pump ComSup Sys Com Boil Out Com Heat Dem Ret H T N Pressure Relief Exp Tank HEAT SOURCE Input from Heat Source Output to System Supply Sensor FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 59 X - Pump Block Connected to Zone Valve Control Power H N Input Outdoor Sensor T Power Cord Boiler Operation Off-Enable On-Control Boiler XPB T Factory Installed Transformer ZONE 4 PRIORITY MODE NORMAL RESET T T ZONE 1 POWER IN Back of Control MAIN END SWITCH H EXTRA END SWITCH T T ZONE 2 T T ZONE 3 T T ZONE 4 OFF ON ZVC 404 FUSE (3 AMP MAX) Pump ComSup Sys Com Boil Out Com Heat Dem Ret T FOUR ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 ZONE 2 ZONE 3 1 2 3 4 1 2 3 4 1 2 3 4 N/O COM N/C ZONE 4 RELAY ZONE 4 1 2 3 4 N Pressure Relief Radiant Manifold - Return HEAT SOURCE Exp Tank Output to System Input from Heat Source Supply Sensor Radiant Manifold - Supply X - Pump Block Connected to 2 SR502/503 Switching Relays T T T 24 VAC POWER ZONE1 SR 502 Power Cord ZONE2 T Outdoor Sensor TWO ZONE SWITCHING RELAY FUSE 1 AMP 24 VAC POWER ZONE1 SR 502 ZONE2 TWO ZONE SWITCHING RELAY N P ZC H X1 X2 ZR ZONE1 ZONE2 Boiler Power Input XPB Boiler Operation Off-Enable On-Control FUSE 1 AMP Back of Control N H N P ZC H X1 X2 ZR Pump ComSup Sys Com Boil Out Com Heat Dem Ret H Power Input N H N Pressure Relief Return Sensor Exp Tank Input from Heat Source Output to System Supply Sensor FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 60 ZONE1 ZONE2 Typical Radiant Floor to Water Heater Installation Domestic Hot Supply Cold Supply X-PUMP BLOCK Relief Valve Air Separator C MIX H Return ASSE 1017 Tempering Valve Exp. Tank RADIANT SYSTEM (Secondary Side of the System) Supply Check Valve Hot Cold WATER HEATER WARNING! A pressure relief valve and expansion tank must be installed on the secondary side in addition to any pressure relief valve and expansion tank which is installed on primary side of system. Use dedicated supply and return piping to the X-Pump Block from the water heater so as not to add heated water into the house’s cold water piping. Typical Snow Melt Installation Separator SYSTEM RETURN SENSOR Exp. Tank Relief Valve X-PUMP BLOCK { Note 3 { Return Exp. Tank { } { Note 1 Note 2 Note 2 Note 1 { Note 3 (Tb) Air Separator (Ts) (ΔTs) SYSTEM SUPPLY SENSOR Supply HEAT SOURCE HEAT SOURCE RETURN SENSOR (OPTIONAL) Tb = Boiler Supply Temperature Ts = System Supply Temperature ΔTs = System Temperature Drop (typically 20°F for convectors and 10°F for radiant floor heating) FIXED SPEED CIRCULATOR (4 PIN PLUG) SNOW MELT SYSTEM VARIABLE SPEED CIRCULATOR (3 PIN PLUG) Note 1: There must be no more than 4 pipe diameters between the tees in the boiler and system loops in order to prevent ghost flow when the variable speed injection pump is off and either the boiler pump or system pump is on. Note 2: There must be at least 6 pipe diameters of straight pipe on either side of the tees in order to prevent the momentum of water in the boiler and system loops from pushing flow through the injection loop. Note 3: There should be a minimum 1 foot drop to create a thermal trap in order to prevent convective heat transfer through the injection loop. 61 iSeries Mixing Valve System Supply Sensor Boiler Return Sensor Back of Control Boiler Return Sensor (optional) BOILER SUPPLY SETBACK C POWER GREEN R BOILER SUPPLY OUTDOOR 24 VAC POWER INPUT SENSOR ERROR RED SENSOR COMMON Setback Input Back of Control System Supply Sensor C POWER GREEN R 24 VAC POWER INPUT SENSOR ERROR RED SENSOR COMMON Outdoor Sensor 24 V (ac) Transformer or End Switch 24 V (ac) Transformer iValve-S End Switch or iValve-R iValve, 2-Way Injection, Single Zone Outdoor Sensor Thermostat T BACK OF iVALVE-R MIXING VALVE ACTUATOR SENSOR COMMON BOILER POWER SUPPLY GREEN OUTDOOR 24 VAC POWER INPUT SR501 1 Z ONE SWIT CHING RELAY R W T T 24 VAC COM C R 24 Volt Transformer 120 VAC INPUT SENSOR ERROR RED N H 3 4 N/O 4 N/C 6 N/C 6 N/O 5 H N Power Input iSeries-R A B Supply Sensor Boiler Sensor FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 62 iValve, 3-Way Mixing Working with SR502/503 Switching Relay with DHW Priority T DHW Aquastat Power Input H Outdoor Sensor T A 24 VAC POWER Z ONE1 SR 503 N Z ONE2 Z ONE3 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP BACK OF iVALVE-R MIXING VALVE ACTUATOR 24 Volt Transformer BOILER POWER SUPPLY GREEN OUTDOOR Thermostats N 24 VAC SENSOR COMMON POWER INPUT P ZC H X1 X2 ZR Z ONE1 Z ONE2 Z ONE3 C R SENSOR ERROR RED DHW Circ. Supply Sensor iSeries-R C C B B A A Boiler Sensor iValve, 4-Way Mixing Working with Zone Valve Control BACK OF iVALVE-R MIXING VALVE ACTUATOR M 24 Volt Motor End Switch SENSOR ERROR RED M T T ZONE 1 FUSE (5 AMP MAX) Transformer C R POWER IN Power H Input N 24 VAC SENSOR COMMON POWER INPUT E ND SWITCH N/O COM N/C T Thermostats T T ZONE 2 T T ZONE 3 ZVC 403 THREE ZONE ZONE VALVE CONTROL ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 End Switch BOILER POWER SUPPLY GREEN OUTDOOR Factory Installed Transformer T Motor Outdoor Sensor Supply Sensor iSeries-R Boiler Sensor FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard 63 Wiring for Boilers with Honeywell Control Center Model R8285 or Equivalent TACO LTR0243T-1 WH RED YEL GRN YEL FACTORY WIRING FEMALE CONNECTOR MALE CONNECTOR GROUND CONNECTION Alternate Wiring TACO LTR0243T-1 WH RED YEL GRN YEL 24 VAC CLASS 2 TRANSFORMER LIMIT CONTROLS HOT 120 VAC 24 VAC COMMON 64 GAS VALVE Wiring Boilers with a United Technologies Integrated Control Module and a Taco LTR0243U-1 INTEGRATED BOILER CONTROL MALE CONNECTOR FEMALE CONNECTOR FACTORY WIRING BOILER MODULE WIRING HARNESS Wiring Boilers with a United Technologies Ucontrol or other Integrated Control Modules which accept a 4-pin harness and a Taco LTR0243L-1 4-PIN CONNECTOR (#1) 4-PIN CONNECTOR (#2) INTEGRATED CONTROL MODULE WIRING HARNESS Wiring Instructions 1. Plug the 4-pin connector on the wiring harness (#1 as shown) into the integrated control module. 2. Plug the 4-pin connector on the wiring harness (#2 as shown) into the LTR. 65 Wiring Taco LN and LTA-2 Series Low Water Cutoffs Using Burner Circuit Power Source * *Factory Installed NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VAC is supplied by an external circuit to terminals H and N. Wiring Taco LN and LTA-2 Series Low Water Cutoffs Using Power Source Other Than Burner Circuit NOTE: For 24 VAC models, LNA024xx and LTA0243S-2, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LNA120xx and LTA1203S-2, 120 VAC is supplied by an external circuit to terminals H and N. 66 Wiring Taco LT Series (1st generation, -1) Low Water Cutoffs Using Burner Circuit Power Source * *Factory Installed NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LTx120xx-1, 120 VAC is supplied by an external circuit to terminals H and N. Wiring Taco LT Series (1st generation, -1) Low Water Cutoffs Using Power Source Other Than Burner Circuit NOTE: For 24 VAC models, LTx024xx-1, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LTx120xx-1, 120 VAC is supplied by an external circuit to terminals H and N. 67 Wiring Taco LF Series Low Water Cutoffs Using Burner Circuit Power Source NOTE: Remote probe available on remote probe models only. NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N. Wiring Taco LF Series Low Water Cutoffs Using Power Source Other Than Burner Circuit NOTE: For 24 VAC models, LFx024xx, 24 VAC to be supplied by an EXTERNAL Class 2 power source to terminals H and N. For 120 VAC models, LFx120xx, 120 VAC is supplied by an external circuit to terminals H and N. 68 Taco Low Water Cutoff Replacement Guide Taco LFA1203S-1 LTA1203N-1 LTA1203S-1 LFM1203S-1 LTM1203N-1 LTM1203S-1 LFA0243S-1 LTA0243N-1 LTA0243S-1 LFM0243S-1 LTM0243N-1 LTM0243S-1 LFA1203R-1 LTA1203R-1 LFM1203R-1 LTM1203R-1 LFA1202R-1 LTA1202R-1 LFM1202R-1 LTM1202R-1 LFA0242R-1 LTA0242R-1 LTA0243S-2 LNA0243S-1 LTA1203S-2 LNA1203S-1 LTR0243T-1 P3R-1 EWF120 EWF024 McDonnell & Miller PS-801-120 PSE-801-120 PS-800-120 PS-850-120 900 900C PS-801-M-120 PS-851-M-120 PS-851-SP-M-120 PS-850-M-120 900M 901M 902M PS-802-24 PSE-802-24 PS-800-24 PS-850-24 PS-802-M-24 PS-852-M-24 PS-852-SP-M-24 PS-850-M-24 750-T-120 750-120 750-MT-120 750-M-120 Hydrolevel Honeywell 450 CG450 CGT450 OEM170TD RW700A1031 RW700A1056 RW700A1080 550 550SV 750 OEM170MC OEM170M RW700B1054 RW700B1039 RW700B1021 400 CG400 OEM24TD RW700A1098 500 500SV 700 OEM24MC 650R 550R PS-851-RX2-120 650R PS-851-M-RX2-120 550R PS-802-RX2-24 400R PS-852-24 PS-852-SP-24 750-MT-SP-24 750P-MT-24 750P-MT-U-24 RB-120 RB-122E PS-851-120 PS-851-SP-120 750P-MT-120 750P-MT-SP-120 750P-MT-U-120 901 RB-120II RB-122 RB-24E RB-24 24 24SV 600 600SV OEM24C RS-1-BR-1 RS-1-LP RS-1-LP-S WFE-120 WF2-U-120V WF-2-120 WF-4-120 WFE-24 WF2-U-24V WF-2-24 WF-4-24 Bold / Italics Indicates Discontinued Part Number 170 170SV 1150 650 650SV OEM170C OEM170 RW700A1007 RW700A1006 1100 EL1214-R VRTX-120 V-120-1&2 VW400A1004 VRTX-24 V-24-1&2 VW800A1004 69 Taco LF Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits McDONNELL & MILLER PS-801/851-120 w/Red & Amber LEDs Series 750 TACO LFx120x NC NO COM H N GND P 1 2 3 4 5 HOT HOT BURNER CIRCUIT 120 VAC CIRCUIT FACTORY INSTALLED JUMPER BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL NEUTRAL McDONNELL & MILLER PS-801/851-120 w/Red & Green LEDs HYDROLEVEL 450, 550, 650 & 750 2 1 P1 P2 N A HOT H C W B HOT BURNER CIRCUIT 120 VAC CIRCUIT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL NEUTRAL 120 VAC Models with 24 VAC Burner Circuits McDONNELL & MILLER PS-801/851-120 w/Red & Amber LEDs Series 750 TACO LFx120x NC NO COM H N GND 1 P HOT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL HOT 120 VAC CIRCUIT NEUTRAL 70 P2 A BURNER CIRCUIT 24 VAC TRANSFORMER 5 BURNER CIRCUIT 24 VAC TRANSFORMER McDONNELL & MILLER PS-801/851-120 w/Red & Green LEDs HYDROLEVEL 450, 550, 650 & 750 P1 4 HOT 24 VAC TRANSFORMER 1 3 120 VAC CIRCUIT NEUTRAL 2 2 N H C W HOT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL B 24 VAC TRANSFORMER Taco LF Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits TACO LFx024x NC NO COM H N GND P HOT BURNER CIRCUIT 24 VAC CIRCUIT FACTORY INSTALLED JUMPER NEUTRAL McDONNELL & MILLER PS-802/852-24 HYDROLEVEL 400, 500, 600 & 700 2 1 P1 P2 N A HOT H C W B HOT BURNER CIRCUIT 24 VAC CIRCUIT BURNER CIRCUIT 24 VAC CIRCUIT NEUTRAL NEUTRAL 24 VAC Models with 120 VAC Burner Circuits TACO LFx024x NC NO COM H N GND P HOT BURNER CIRCUIT 120 VAC CIRCUIT 24 VAC TRANSFORMER NEUTRAL McDONNELL & MILLER PS-802/852-24 HYDROLEVEL 400, 500, 600 & 700 2 1 P1 P2 HOT N A C W B HOT BURNER CIRCUIT 120 VAC CIRCUIT BURNER CIRCUIT 120 VAC CIRCUIT 24 VAC TRANSFORMER NEUTRAL H 24 VAC TRANSFORMER NEUTRAL 71 Taco LTA-2 Series 120 Volt LWCO Competitive Wiring Cross Reference 120 VAC Models with 120 VAC Burner Circuits McDONNELL & MILLER RB-120 TACO LTA1203S-2 N H COM NC NO 1 HOT 2 3 4 5 HOT 120 VAC CIRCUIT FACTORY INSTALLED JUMPER BURNER CIRCUIT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL NEUTRAL McDONNELL & MILLER RB-122E N H B HYDROLEVEL 1150 H C HOT N HYDROLEVEL 170 CUT-OFF GN HOT BURNER CIRCUIT 120 VAC CIRCUIT P1 P2 A HOT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL H BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL NEUTRAL 120 VAC Models with 24 VAC Burner Circuits McDONNELL & MILLER RB-120 TACO LTA1203S-2 N H COM NC HOT 1 NEUTRAL 24 VAC TRANSFORMER H B HOT 120 VAC CIRCUIT NEUTRAL 72 H 24 VAC TRANSFORMER HOT 120 VAC CIRCUIT NEUTRAL N 24 VAC TRANSFORMER 5 24 VAC TRANSFORMER HYDROLEVEL 170SV CUT-OFF BURNER CIRCUIT 4 BURNER CIRCUIT HYDROLEVEL 1150 C BURNER CIRCUIT 3 120 VAC CIRCUIT McDONNELL & MILLER RB-122E N 2 HOT BURNER CIRCUIT 120 VAC CIRCUIT NEUTRAL NO GN HOT 120 VAC CIRCUIT NEUTRAL H P1 P2 A BURNER CIRCUIT 24 VAC TRANSFORMER Taco LTR and LTA-2 Series 24 Volt LWCO Competitive Wiring Cross Reference 24 VAC Models with 24 VAC Burner Circuits McDONNELL & MILLER RB-24E TACO LTA0243S-2 N COM NC H Red White Yellow Yellow Wire Wire Wire Wire NO HOT HOT 24 VAC CIRCUIT BURNER CIRCUIT FACTORY INSTALLED JUMPER NEUTRAL NEUTRAL TACO LTR0243T-1 HYDROLEVEL 1100 Red White Yellow Yellow Wire Wire Wire Wire Red White Yellow Yellow Wire Wire Wire Wire HOT 24 VAC CIRCUIT BURNER CIRCUIT 24 VAC CIRCUIT 24 VAC CIRCUIT NEUTRAL 2 P1 1 P2 A HOT HOT BURNER CIRCUIT HYDROLEVEL 24 BURNER CIRCUIT 24 VAC CIRCUIT BURNER CIRCUIT JUMPER NEUTRAL NEUTRAL 24 VAC Models with 120 VAC Burner Circuits HYDROLEVEL 24 TACO LTA0243S-2 N H COM NC 2 NO HOT HOT 120 VAC CIRCUIT 120 VAC CIRCUIT BURNER CIRCUIT NEUTRAL 24 VAC TRANSFORMER 1 P1 P2 A BURNER CIRCUIT NEUTRAL 24 VAC TRANSFORMER 73 Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder with the Same Voltages EWF Standard Wiring Taco LFx120x / L F x024x NC NO COM H N GND P HOT BURN ER C IR C U IT FACTORY INSTALLED JUMPER 120 V AC / 24 V A C C I R C U IT NEUTRAL LW N H Taco E W F 120 /E W F 024 Wiring Taco LF Series Low Water Cutoffs to Taco Electric Water Feeder with Different Burner Voltages EWF Alternate Wiring T a c o L F x 02 4 x T a co L F x1 2 0 x NC NO COM H * B UR NE R CI RC UI T N GND P NC NO COM * HO T 12 0 V A C C IR C U IT B UR NE R CI RC UI T LW T a co E W F 0 2 4 24 V AC C IR C U IT NE U TR AL P HO T HO T H N LW T a co E W F 1 2 0 * N O T E : R e m o v e f a c to r y i n s t a ll e d ju m p e r b etw e e n H a n d C O M t e r m in a ls 74 GND NE U TR AL HO T N N 24 V AC C IR C U IT NE U TR AL H H 12 0 V A C C IR C U IT NE U TR AL Wiring Taco 24VAC Electric Water Feeder to Taco LF Series 24VAC Low Water Cutoff or 24VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs M c D o n n e l l & M il l e r P S -8 0 2 /8 5 2 -2 4 B W C H N H yd ro le v e l 400, 50 0, 600, & 700 P2 A P1 1 2 Taco LFx024x NC NO COM H N GND P HOT B UR N E R C IR C U IT ** Ma y be fa ctory installed on som e L W C O s 24 V A C C IR C U IT INSTALLED JUMPER ** N O T E : Wiring s hown only for control an d burner circuits of the sam e volta ge. S om e term ina l designations ar e n ot in their actual order on the LW C O s. NEUTRAL LW N H Taco EW F 024 Wiring Taco 120VAC Electric Water Feeder to Taco LF Series 120VAC Low Water Cutoff or 120VAC McDonnell & Miller or Hydrolevel Low Water Cutoffs M c D o n n e ll & M ill e r P S -8 0 1 /8 5 1 -1 2 0 w /R e d & A m b e r L E D s , S e rie s 7 5 0 5 4 3 1 2 M c D o n n e ll & M ill e r P S -8 0 1 /8 5 1 -1 2 0 w /R e d & G r e e n L E D s B W C H N H yd ro le v e l 450, 55 0, 650, & 750 P2 A P1 1 2 Taco LFx120x NC NO COM H N GND P HOT B UR N E R C IR C U IT INSTALLED JUMPER ** 120 V A C C IR C U IT NEUTRAL LW N ** Ma y be fa ctory installed on som e L W C O s N O T E : W iring s hown only for control an d burner circuits of the sam e volta ge. S om e term ina l designations are n ot in their actual order on the LW C O s. H Taco EW F 120 75 Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1 UNI-MATCH WATER FEEDER MODEL WF2-U-24 24VAC SUPPLY 50/60 Hz 2 3 0R W N M&M 2 3 H N Note on switch position: H BURNER N H If using the LTA-2 series, choose whichever position best matches the application: NC NO COM Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle. AC POWER OUTPUT CONTACTS 24 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed Do not connect feeder to a manual reset LWCO. Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff to McDonnell & Miller Series WF2 Uni-Match Electric Water Feeder SWITCH POSITION #2 1 UNI-MATCH WATER FEEDER MODEL WF2-U-120 120VAC SUPPLY 50/60 Hz 2 3 0R W N M&M 2 3 H N Note on switch position: H BURNER Switch setting 1 (M&M), the feed cycle repeats indefinitely. Position 2 and 3 gives one feed cycle. If using the LTA-2 series, choose whichever position best matches the application: N H COM NC NO AC POWER OUTPUT CONTACTS 120 VAC LWCO Using Burner Circuit Power Source Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. Do not connect feeder to a manual reset LWCO. 76 WF-2 switch to position 1 - 60 sec. delay, 90 sec. feed, repeats WF-2 switch to position 2 - 90 sec. delay, 90 sec. feed WF-2 switch to position 3 - 100 sec. delay, 90 sec. feed Wiring TACO LF Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Water Feeder (Non-Display Model) Set Safgard as desired. SAFGARD VXT-24 WATER FEEDER WHITE BLACK N 24VAC SUPPLY 50/60 Hz H Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. BURNER N H COM NC NO AC POWER OUTPUT CONTACTS Do not connect feeder to a manual reset LWCO. 24 VAC LWCO Using Burner Circuit Power Source Wiring TACO LF Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Water Feeder (Non-Display Model) Set Safgard as desired. SAFGARD VXT-120 WATER FEEDER WHITE 120VAC SUPPLY 50/60 Hz BLACK N H Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. BURNER N H COM NC NO AC POWER OUTPUT CONTACTS Do not connect feeder to a manual reset LWCO. 120 VAC LWCO Using Burner Circuit Power Source 77 Wiring TACO LTA-2 or LF Series 24VAC Low Water Cutoff to Hydrolevel VXT-24 Programmable Water Feeder (Model with Display) Set Safgard as desired. SAFGARD VRTX-24 WATER FEEDER WHITE 24VAC SUPPLY 50/60 Hz BLACK RED N H Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. BURNER N H COM NC NO AC POWER OUTPUT CONTACTS Do not connect feeder to a manual reset LWCO. 24 VAC LWCO Using Burner Circuit Power Source Wiring TACO LTA-2 or LF Series 120VAC Low Water Cutoff to Hydrolevel VXT-120 Programmable Water Feeder (Model with Display) Set Safgard as desired. SAFGARD VRTX-120 WATER FEEDER WHITE 120VAC SUPPLY 50/60 Hz BLACK RED N H Remove jumper between H and COM if using power source other than burner circuit or when using mixed voltages. BURNER N H COM NC NO AC POWER OUTPUT CONTACTS Do not connect feeder to a manual reset LWCO. 120 VAC LWCO Using Burner Circuit Power Source 78 RB-120 RB-24 24 170 1100 1150 McDonnell & Miller McDonnell & Miller Hydrolevel Hydrolevel Hydrolevel Hydrolevel Hydrolevel Hydrolevel RW700A1098 400, 500, 600, 700, 450, 550, 650, 750 RW700 Series (Except RW700A1098) RB-122 McDonnell & Miller Hydrolevel Series 750 McDonnell & Miller McDonnell & Miller McDonnell & Miller McDonnell & Miller PS-801/851 (Older Models w/Red & Amber LEDs) PS-801/851 (New Models w/Red & Green LEDs) PS-802/852 (Older Models w/Red & Amber LEDs) PS-802/852 (Older Models w/Red & Green LEDs) LTR Series Taco McDonnell & Miller LTA-2 & LN Series Taco Device or Series LF & LT-1 Series Manufacturer T1 L1 T2 L2 2 N (White Wire) H (Black Wire) 1 White Wire GN 2 White Wire Red Wire H 1 Red Wire 2 N (White Wire) H (Black Wire) 1 2 N N N 2 White Wire N N Neutral 1 H H H 1 Red Wire H H Hot Power Connections — — P1 CUT-OFF (Yellow Wire) Yellow Wire P1 P1 Yellow Wire 3 C (Yellow Wire) 3 C C C 3 Yellow Wire COM COM Common B B P2 CUT-OFF (Yellow Wire) Yellow Wire P2 P2 Yellow Wire 4 B (Yellow Wire) 5 B B B 5 Yellow Wire NC NC To Burner Circuit A A A — — A A — 5 — 4 W W W 4 — NO NO To EWF’s LW Terminal/Alarm Output Contacts 2 Red Wires, White Wire 2 Red Wires, White Wire H3 — — — — — — — P J3 J7 J2 P or J2 — — P Probe Green Wire Green Wire Chassis GND — — — — — — — Chassis GND Chassis GND Chassis GND Chassis GND Chassis GND — — GND Probe Preference Remote Probes Taco LTR, LN, LT-1, LTA-2 & LF Series Low Water Cutoff and Taco Electric Water Feeder Wiring Cross Reference Taco 79 Aquastat Wiring L1 (HOT) L2 (NEUTRAL) 120 VAC INPUT L1 T L2 TACO ZONE CONTROL T END SWITCH C1 B2 ZC C2 ZR B1 CIRCULATOR ON BOILER (IF ATTACHED) HONEYWELL L8124A & C OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE MILLI-VOLTAGE GAS VALVE B1 T B2 TACO ZONE CONTROL T END SWITCH C L1 L1 (HOT) TV L2 CIRCULATOR ON BOILER (IF ATTACHED) C2 L2 (NEUTRAL) 120 VAC INPUT HONEYWELL L8124B OR EQUAL TACO ZONE CONTROL Z T END SWITCH CIRCULATOR ON BOILER (IF ATTACHED) B1 C2 L1 L2 B2 LOW VOLTAGE GAS VALVE 80 C1 L1 (HOT) 120 VAC INPUT L2 (NEUTRAL) HONEYWELL L8124E OR EQUAL Aquastat Wiring TV TACO ZONE CONTROL Z T END SWITCH L1 ZC ZR B1 L2 B2 C2 C1 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE 120 VAC INPUT L1 (HOT) CIRCULATOR ON BOILER (IF ATTACHED) L2 (NEUTRAL) L1 (HOT) HONEYWELL L8124G & L OR EQUAL L2 (NEUTRAL) 120 VAC INPUT L1 T L2 TACO ZONE CONTROL T END SWITCH B2 C1 ZC C2 ZR B1 CIRCULATOR ON BOILER (IF ATTACHED) L1 (HOT) HONEYWELL L8124M OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE L2 (NEUTRAL) 120 VAC INPUT L1 T L2 TACO ZONE CONTROL T END SWITCH 3 C1 C2 B1 CIRCULATOR ON BOILER (IF ATTACHED) B2 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE HONEYWELL L8148A OR EQUAL 81 Aquastat Wiring TV TACO ZONE CONTROL T W END SWITCH CIRCULATOR ON BOILER (IF ATTACHED) Z B1 C1 C2 L1 L2 B2 TV W TP Z 120 VAC INPUT L1 (HOT) LOW VOLTAGE GAS VALVE L2 (NEUTRAL) HONEYWELL L8148E OR EQUAL TACO ZONE CONTROL T END SWITCH MILLIVOLTAGE GAS VALVE B1 B2 CIRCULATOR ON BOILER (IF ATTACHED) C2 L1 L2 B3 LOW VOLTAGE GAS VALVE OR C1 L1 (HOT) L1 (HOT) 120 VAC INPUT L2 (NEUTRAL) HONEYWELL L8148J OR EQUAL L2 (NEUTRAL) 120 VAC INPUT L1 B1 L2 B2 C2 TACO ZONE CONTROL OIL BURNER AND IGNITION END SWITCH C1 ZC CIRCULATOR ON BOILER (IF ATTACHED) ZR T T F F CAD CELL 82 HONEYWELL L8182D OR EQUAL Aquastat Wiring L1 (HOT) L2 (NEUTRAL) 120 VAC INPUT L1 T L2 TACO SWITCHING RELAY T END SWITCH X X T ZC ZR N H THERMOSTAT (IF INDEPENDENT ZONE) C1 B2 ZC C2 ZR B1 CIRCULATOR ON BOILER (IF ATTACHED) THERMOSTAT (IF INDEPENDENT ZONE) T TV HONEYWELL L8124A & C OR EQUAL LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE END SWITCH X X Z T L1 ZC ZR B1 L2 B2 C2 C1 120 VAC INPUT CIRCULATOR ON BOILER (IF ATTACHED) L2 (NEUTRAL) L1 (HOT) TACO SWITCHING RELAY ZC ZR N H LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE HONEYWELL L8124G & L OR EQUAL L1 (HOT) 120 VAC INPUT L1 L2 (NEUTRAL) T L2 TACO SWITCHING RELAY T T END SWITCH X X ZC ZR N H THERMOSTAT (IF INDEPENDENT ZONE) C1 B2 C2 ZC ZR CIRCULATOR ON BOILER (IF ATTACHED) B1 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE HONEYWELL L8124M OR EQUAL 83 Aquastat Wiring L1 (HOT) 120 VAC L2 (NEUTRAL) INPUT L1 T L2 R B2 3 W B B L6006 LOW LIMIT CONTROLER TACO SWITCHING RELAY T T END SWITCH X X ZC ZR N H THERMOSTAT (IF INDEPENDENT ZONE) R C2 C1 B2 B1 LINE VOLTAGE OIL BURNER RELAY OR GAS VALVE CIRCULATOR ON BOILER (IF ATTACHED) L1 (HOT) L2 (NEUTRAL) 120 VAC INPUT L1 HONEYWELL L8148A OR EQUAL B1 L2 B2 C2 C1 ZC OIL BURNER AND IGNITION CIRCULATOR ON BOILER (IF ATTACHED) END SWITCH X X TACO SWITCHING RELAY ZC ZR N H ZR T T T 84 F THERMOSTAT (IF INDEPENDENT ZONE) F CAD CELL HONEYWELL L8182D OR EQUAL Wiring for Boilers with Honeywell Aquastat Model L8124E or Equivalent FACTORY WIRING (unplug from B1 terminal) TACO LTR0243T-1 WH RED YEL GRN YEL TV Z T CIRCULATOR ON BOILER (IF ATTACHED) HONEYWELL L8124E B1 C1 C2 L1 L2 MALE CONNECTOR B2 G L1 (HOT) FEMALE CONNECTOR L2 (NEUTRAL) 120 VAC INPUT NOTE: The green wire must be connected to a ground source electrically common to the boiler ground. Wiring for Boilers with Honeywell Aquastat Model L8148E or Equivalent TACO LTR0243T-1 FACTORY WIRING (unplug from B1 terminal) WH RED YEL GRN YEL TV T W Z CIRCULATOR ON BOILER (IF ATTACHED) HONEYWELL L8148E B1 C1 C2 L1 L2 B2 G L1 (HOT) FEMALE CONNECTOR MALE CONNECTOR L2 (NEUTRAL) 120 VAC INPUT NOTE: The green wire must be connected to a ground source electrically common to the boiler ground. 85 Aquastat Wiring to 24VAC Low Water Cutoff TO THERMOSTAT TACO LNA024 or LTA024-2 N TV COM NC NO HONEYWELL L8148E T W H Z B CIRCULATOR ON BOILER (IF ATTACHED) R B1 C1 C2 L1 L2 B2 SPILL SWITCH L1 (HOT) G L2 (NEUTRAL) 120 VAC INPUT LOW VOLTAGE GAS VALVE Aquastat Wiring to 120VAC Low Water Cutoff TO THERMOSTAT TACO LNA120 OR LTA120-2 N TV HONEYWELL L8148E T W Z CIRCULATOR ON BOILER (IF ATTACHED) B R B1 C1 C2 L1 L2 B2 G SPILL SWITCH LOW VOLTAGE GAS VALVE 86 L1 (HOT) L2 (NEUTRAL) 120 VAC INPUT H COM NC NO Instruction Sheet SR501 Switching Relay Typical Wiring Features: External Indicator Lights Universal Replaceability Snap-in PC Board Simplified Wiring Fully Enclosed Snap-Out Relays 100% Factory Tested Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA Alternative Wiring THERMOSTAT SR501 1 ZONE SWITCHING RELAY SR501 1 ZONE SWITCHING RELAY 24 R W VAC COM T T 24 R W VAC COM T T POWER POWER T STAT T STAT 120 VAC INPUT Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator. THERMOSTAT 120 VAC INPUT 4 4 6 6 5 N H 3 N/O N/C N/C N/O 4 4 6 6 5 N H 3 N/O N/C N/C N/O JUMPER TO: ZC TO: TT ON BOILER Power Input: Connect 120 volt ac power to terminals N and H. TO: 120 VAC POWER TO: 120 VAC POWER CIRCULATOR Jumper Placement: The jumper is factory installed between terminals H and 3 to switch power on terminals 4 n/o and 4 n/c. TO: ZR CIRCULATOR Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. External Diagnostics: The External lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Terminal Description: T&T Thermostat Connection COM Common side of transformer, to power some setback thermostats N Neutral wire of power input H Hot wire of power input 3 Common terminal for 4 n/o and 4 n/c 4 n/o Normally open terminal 4 n/c Normally closed terminal 6 n/c Normally closed terminal 6 n/o Normally open terminal 5 Common terminal for 6 n/o and 6 n/c The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. TACO SR501 REPLACEMNENT CROSS-REFERENCE Specifications: PRODUCT NUMBER SR501 NUMBER TRANSFORMER OF ZONES VOLTAGE 1 Zone 120 VAC Input MAXIMUM COMBINED LOAD 7.2 amps DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4" 5 1/4" 2 3/4" All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC. Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. MANUFACTURER MODEL Taco SR501 CONNECTIONS H N 3 4 NO 4 NC 5 6 NO Argo AR821 1 2 3 4 6 5 6 NC R/T W/T C T AR822 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C Colombus MR10 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C Erie SR100 L1 L2 3 4 NO 4 NC 5 6 NO 6 NC R/T G/T C Honeywell RA89A 1 2 3 4 T T RA832A 1 2 3 4 X X T T R845A 1 2 3 4 5 6 T T 889-189 1 2 3 4 T T 829-845 1 2 3 4 T T White-Rogers 5 Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. 6 Printed in USA Copyright 2005 TACO, Inc. Visit our web site at: http://www.taco-hvac.com 87 Instruction Sheet SR501-845RP Universal Replacement Relay Alternative Wiring THERMOSTAT REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY THERMOSTAT REPLACES HONEYWELL R845, RA89A & RA832 OR COMPARABLE RELAY Features: Universal Replaceability Indicator Lights Snap-in PC Board to Existing Enclosure Simplified Wiring Fully Enclosed Snap-Out Relay 100% Factory Tested Universal Thermostat Compatibility UL Approved Extended 3 Year Warranty Made in the USA Typical Wiring R W T T R W T T POWER POWER UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP UNIVERSAL REPLACEMENT RELAY MODEL: SR501-845RP T STAT 120 VAC INPUT 120 VAC INPUT L2 L1 3 4 5 6 L2 L1 3 4 5 6 Operation: Connect a thermostat to the “T T” terminals on the switching relay. When the thermostat calls for heat, the relay is energized and power is given to the circulator. T STAT TO: TT ON BOILER TO: ZC CIRCULATOR TO: ZR CIRCULATOR JUMPER Power Input: Connect 120 volt ac power to terminals L1 and L2. Jumper Placement: The jumper is factory installed between terminals L1 and 3 to switch power on terminal 4. Diagnostics: The Indicator lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Terminal Description: T&T L2 L1 3 4 6 5 Thermostat Connection Neutral wire of power input Hot wire of power input Common terminal for 4 Normally open terminal Normally open terminal Common terminal for 6 TO: 120 VAC POWER TO: 120 VAC POWER Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Specifications: PRODUCT NUMBER NUMBER OF ZONES SR501-845RP 1 Zone TRANSFORMER MAXIMUM VOLTAGE COMBINED LOAD DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 120 VAC Input 4 1/4" 7.2 amps TACO SR501-845RP REPLACEMENT CROSS-REFERENCE MANUFACTURER MODEL CONNECTIONS Taco SR501-845RP L1 L2 3 4 5 6 R/T Argo AR821 1 2 3 4 5 6 T W/T AR822 L1 L2 3 4 NO 5 6 NO R/T G/T Colombus MR10 L1 L2 3 4 NO 5 6 NO R/T G/T Erie SR100 L1 L2 3 4 NO 5 6 NO R/T G/T Honeywell RA89A 1 2 3 4 RA832A 1 2 3 4 X R845A 1 2 3 4 5 889-189 1 2 3 4 829-845 1 2 3 4 White-Rogers 5 T T X T T 6 T T 6 T T T T Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. 88 2 3/4" All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC. Do it Once. Do it Right.® Visit our web site at: http://www.taco-hvac.com 5 1/4" Printed in USA Copyright 2005 TACO, Inc. Instruction Sheet SR502 & SR503 Switching Relay Cold Start Boiler Application Tankless Coil Boiler Application THERMOSTATS THERMOSTATS 24 VAC POWER 24 VAC POWER SR 503 ZONE1 ZONE2 SR 503 ZONE3 ZONE1 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY FUSE 1 AMP N P ZC H ZONE3 FUSE 1 AMP POWER ZONE 1 ZONE 2 ZONE 3 X2 X1 ZR ZONE1 ZONE2 ZONE2 THREE ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY N P ZC H ZONE3 POWER ZONE 1 ZONE 2 ZONE 3 X2 X1 ZR ZONE1 ZONE2 ZONE3 JUMPERS JUMPERS TO: 120 VAC POWER (NEUTRAL) TO: 120 VAC POWER (NEUTRAL) TO: 120 VAC POWER (HOT) TO: 120 VAC POWER (HOT) 120 VOLT CIRCULATORS TO: "TT" ON AQUASTAT CONTROL TO: "ZC" ON AQUASTAT CONTROL 120 VOLT CIRCULATORS TO: "ZR" ON AQUASTAT CONTROL TO: "TT" ON AQUASTAT CONTROL Note: When using Alternative Wiring diagram, the boiler operating control’s ZC terminal will see the load of the circulator(s). Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When the thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X1 and X2) will start the boiler. Jumper Placement: The jumper should be placed between terminals ZC and H. Connect the isolated end switch, X1 and X2 to the boiler aquastat control. For zone 1 priority, remove jumper between terminals P and ZC. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Specifications: PRODUCT NUMBER NUMBER OF ZONES TRANSFORMER VOLTAGE MAXIMUM COMBINED LOAD DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH SR502 SR503 2 with Priority 3 with Priority 120 VAC Input 120 VAC Input 15 amps 15 amps 10 1/4" 10 1/4" 6 3/4" 6 3/4" 2 3/4" 2 3/4" All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC. Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit. Jumper Placement: A jumper should be placed between terminals ZC and X1. Connect terminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. For zone 1 priority, remove jumper between terminals P and ZC. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Features: External Indicator Lights Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2005 TACO, Inc. Visit our web site at: http://www.taco-hvac.com 89 Instruction Sheet SR504 & SR506 Switching Relay THERMOSTATS THERMOSTATS Tankless Coil Boiler Application Cold Start Boiler Application SR 506 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 ZONE 6 PRIORITY ON X X END SWITCH ZC ZR 120 VOLT CIRCULATORS POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 24 VAC POWER POWER INPUT OFF 120V RELAY ZONE 5 ZONE 6 ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 ZONE 6 PRIORITY ON SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 120V RELAY 24 VAC POWER SR 506 OFF SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 X X END SWITCH ZONE 5 ZONE 6 ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP FUSE 1 AMP TO: "ZR" ON AQUASTAT JUMPER JUMPER TO: "TT" ON BOILER TO: "ZC" ON AQUASTAT 120 VAC INPUT 120 VAC INPUT Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Specifications: PRODUCT NUMBER NUMBER OF ZONES TRANSFORMER VOLTAGE MAXIMUM COMBINED LOAD DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH SR504 SR506 4 with Priority 6 with Priority 120 VAC Input 120 VAC Input 20 amps 20 amps 10 1/4" 11 3/4" 6 3/4" 7 1/2" 2 3/4" 3" All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC. Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Jumper Placement: MOVE the jumper between terminals ZC and ZR to end switch X and ZC. Connect terminal ZC to ZC terminal on the aquastat control. Connect the other end switch X to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Features: External Indicator Lights Switchable Priority Simplified Wiring Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com 90 Printed in USA Copyright 2005 TACO, Inc. Instruction Sheet SR501-EXP Switching Relay Cold Start Boiler Application Tankless Coil Boiler Application THERMOSTAT T THERMOSTAT T TO: DHW Aquastat if PC700 Boiler Reset is installed. TO: "TT" on Boiler Aquastat TO: DHW Aquastat if PC700 Boiler Reset is installed. POWER CONTROLS POWER CONTROLS MODE MODE END SWITCH EXPANSION X X 1 2 3 4 FUSE 1 AMP K1-A THERMOSTAT RESET OVERRIDE T/R T/W COM 1 2 MASTER K2 K1-B K2-A THERMOSTAT RESET OVERRIDE T/R T/W COM 1 2 RESET NORMAL MASTER K1 SLAVE T STAT H ZC ZR H POWER INPUT K1-A POWER FUSE 5 AMP N EXPANSION X X 1 2 3 4 FUSE 1 AMP NORMAL K1 SLAVE END SWITCH RESET K2 POWER T STAT FUSE 5 AMP K2-A K1-B H N 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT POWER INPUT SR 501-EXP K2-A H ZC ZR H K2-A H 120VAC 120VAC CIRC PRIORITY INPUT OUTPUT OUTPUT OUTPUT SR 501-EXP TO: ZC on Boiler Control JUMPER CIRCULATOR TO: ZR on Boiler Control CIRCULATOR TO: 120 VAC POWER TO: 120 VAC POWER Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When the thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler. Priority Output has power all the time, except when the thermostat is calling. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized through the operation of a plug-in reset control or closure of Priority Input. Jumper Placement: The jumper should be placed between terminals ZC and H. Connect the isolated end switch to the aquastat control on the boiler. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls. Features: External Indicator Lights Ideal for Retrofitting Priority Output Simplified Wiring Add-On Power Controls Sealed Relays Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Expandable to 20 Zones Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA Operation: When the thermostat calls for heat, the appropriate circulator is energized when the boiler’s aquastat is above the set low limit. The ZR (120VAC) output will signal the boiler to start. Priority Output has power all the time, except when the thermostat is calling. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized through the operation of a plug-in reset control or closure of Priority Input. Jumper Placement: REMOVE the jumper between terminals ZC and H. Connect terminal ZC to ZC terminal on the aquastat control. Connect terminal ZR to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls. External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light are energized. Specifications: PRODUCT NUMBER NUMBER OF ZONES SR501-EXP 1 POWER CONTROLS 1 TRANSFORMER VOLTAGE 120 VAC Input MAXIMUM COMBINED LOAD 5.0 amps DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4" 5 1/4" 2 3/4" All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (5.0A) @ 120 VAC. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only with a minimum temperature rating of 60/75°C. Failure to follow this instruction can result in personal injury or death and/or property damage. 12-18 gauge wire recommended for 120 VAC connections, 14-22 gauge wire for thermostat connections, and 14-22 gauge wire for 24 VAC source connections. Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2005 TACO, Inc. Visit our web site at: http://www.taco-hvac.com 91 Instruction Sheet SR503-EXP, SR504-EXP & SR506-EXP Switching Relay Cold Start Boiler Application Tankless Coil Boiler Application THERMOSTATS EXPANSION CONNECTIONS 1234 SLAVE POWER CONTROL INTERFACE EXPANSION CONNECTIONS PLUG-IN CARDS MASTER ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 RESET 24 VAC POWER NORMAL SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY X THERMOSTATS X END SWITCH ZONE 6 PRIORITY ON OFF POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 SR 506-EXP ZC ZR ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS 1234 SLAVE POWER CONTROL INTERFACE PLUG-IN CARDS MASTER ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 RESET 24 VAC POWER SIX ZONE SWITCHING RELAY WITH OPTIONAL PRIORITY 120V RELAY X POWER INPUT POWER ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 SR 506-EXP X ZC ZR END SWITCH FUSE 1 AMP NORMAL ZONE 6 PRIORITY ON OFF ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6 120 VOLT CIRCULATORS POWER INPUT FUSE 1 AMP TO: "ZR" ON AQUASTAT JUMPER JUMPER TO: "TT" ON BOILER 120 VAC INPUT 120 VAC INPUT TO: "ZC" ON AQUASTAT Warning: When using Alternative Wiring diagram, wiring instructions must be followed so power originates from the boiler aquastat. Failure to follow these wiring instructions may result in a secondary source of power being connected to the boiler that may activate it under certain circumstances, causing injury or death. Operation: When any thermostat calls for heat, the appropriate circulator is energized and the isolated end switch (X and X) will start the boiler. Operation: When any thermostat calls for heat, the boiler and appropriate circulator are energized when the boiler temperature is above the set low limit. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation, or through the operation of a plug-in reset control. Jumper Placement: The jumper should be placed between terminals ZC and ZR. Connect the isolated end switch to the aquastat control on the boiler. Jumper Placement: MOVE the jumper between terminals ZC and ZR to end switch X and ZC. Connect terminal ZC to ZC terminal on the aquastat control. Connect the other end switch X to ZR terminal on the aquastat control. Confirm polarity is consistent between boiler aquastat and switching relay. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Power Input: Connect 120 volt ac power input to terminals N and H. Neutral wire to terminal N. Hot wire to terminal H. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls. Expansion Connections: Set the expansion switch to MASTER on the switching relay that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of -EXP controls. Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Fully Enclosed Snap-Out Relays Compact Design Fuse Protected 100% Factory Tested External Diagnostics: Externally visible lights show full functionality of the switching relay. The green light should always be on, indicating that power is connected. When the thermostat calls for heat, both the appropriate circulator and red indicating light is energized. Isolated End Switch Expandable to 20 Zones Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved 24 volt Power Input or Output Terminal Extended 3 Year Warranty Made in the USA Specifications: PRODUCT NUMBER NUMBER OF ZONES POWER PORTS TRANSFORMER VOLTAGE MAXIMUM COMBINED LOAD DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH SR503-EXP SR504-EXP SR506-EXP 3 with Priority 4 with Priority 6 with Priority 3 3 3 120 VAC Input 120 VAC Input 120 VAC Input 20 amps 20 amps 20 amps 10 1/4" 10 1/4" 11 3/4" 6 3/4" 6 3/4" 7 1/2" 2 3/4" 2 3/4" 3" All Switching Relays are relay type DPST, have a thermostat current of .18, and have a single phase motor rating per zone of 1/3 hp (7.2A) @ 120 VAC. Warning: Wiring connections must be made in accordance with all applicable electrical codes and these instructions. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Do it Once. Do it Right.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com 92 Printed in USA Copyright 2005 TACO, Inc. Instruction Sheet ZVC403 & ZVC405 Zone Valve Control THERMOSTAT THERMOSTAT WHITE 24 VAC T T ZONE 1 FUSE (5 AMP MAX) 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER WHITE 24 VAC END SWITCH Installation of Optional System Circulator T T ZONE 2 T T ZONE 2 1 2 3 4 T STAT 1 T T ZONE 5 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 VALVE 4 T STAT 5 VALVE 5 POWER ZONE 5 1 2 3 4 JUMPER 3&4 1 2 3 DRY CONTACTS N/O COM N/C 2 WIRE ZONE VALVE (NO END SWITCH) T T T T ZONE 4 FIVE ZONE ZONE VALVE CONTROL ZONE 1 1 2 3 4 N/O COM N/C T T ZONE 3 ZVC 405 TO CIRCULATOR OR BOILER AQUASTAT RELAY END SWITCH THERMOSTAT 24 VAC POWER IN 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER Wiring Diagram MOTOR TACO 3 WIRE ZONE VALVE END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) HOT BOILER 120 VAC NEUTRAL Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Specifications: PRODUCT NUMBER NUMBER OF ZONES TRANSFORMER VOLTAGE MAX OUTPUT AT 24 VAC ZVC403 ZVC405 3 Zone 5 Zone 120 VAC Input 120 VAC Input 40 VA 80 VA DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 10 1⁄4" 113⁄4" 6 3⁄4" 71⁄2" 2 3⁄4" 3" All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄ hp (5A) @ 120 VAC. 6 Features: External Indicator Lights Simplified Wiring Works with 2, 3, or 4Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2000 TACO, Inc. Visit our web site at: http://www.taco-hvac.com 93 Instruction Sheet ZVC404 & ZVC406 Zone Valve Control Wiring Diagram 24 VAC 24 VAC T T ZONE 1 24 VAC Installation of Optional System and/or DHW Circulator EXTRA MAIN END END SWITCH SWITCH N/O COM N/C ZONE 6 RELAY T T T T ZONE 2 SYSTEM CIRCULATOR DHW CIRCULATOR T T ZONE 4 T T ZONE 5 T T ZONE 6 SIX ZONE ZONE VALVE CONTROL WITH OPTIONAL PRIORITY ZONE 1 1 2 3 4 ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 T STAT 1 VALVE 1 T STAT 2 VALVE 2 T STAT 3 VALVE 3 T STAT 4 ZVC 406 ZONE 5 1 2 3 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 VALVE 6 POWER ZONE 6 1 2 3 4 JUMPER 3&4 SEE NOTE PRIORITY ZONE DRY CONTACTS BOILER T T ZONE 3 JUMPER 3&4 TO CIRCULATOR OR BOILER AQUASTAT RELAY N/O COM N/C OFF ON FUSE (7 AMP MAX) 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER WHITE ZONE 6 PRIORITY MODE NORMAL RESET POWER IN FACTORY INSTALLED TRANSFORMER WHITE T T THERMOSTAT INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT 120 VAC INPUT BLACK EXTRA MAIN END END SWITCH SWITCH THERMOSTAT THERMOSTAT 1 2 3 2 WIRE ZONE VALVE (NO END SWITCH) TACO 3 WIRE ZONE VALVE MOTOR END SWITCH 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) (See Note) NEUTRAL 120 VAC HOT Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relay. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, the end switch relay will be energized if any zone is in operation. When the switch is set to RESET, the end switch relay will only be energized if priority zone is in operation. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Specifications: PRODUCT NUMBER NUMBER OF ZONES TRANSFORMER VOLTAGE MAX OUTPUT AT 24 VAC ZVC404 ZVC406 4 with Priority 6 with Priority 120 VAC Input 120 VAC Input 40 VA 80 VA DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 23⁄4" 3" Features: External Indicator Lights Switchable Priority Simplified Wiring Works with 2, 3, or 4-Wire Zone Valves Compact Design Fuse Protected 100% Factory Tested Isolated End Switch Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility UL Approved Sturdy Screw Connections Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. 94 63⁄4" 71⁄2" All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄ hp (5A) @ 120 VAC. 6 Do it Once. Do it Right. Visit our web site at: http://www.taco-hvac.com 101⁄4" 113⁄4" Printed in USA Copyright 2000 TACO, Inc. Instruction Sheet ZVC404-EXP & ZVC406-EXP Zone Valve Control THERMOSTAT THERMOSTAT WHITE N/O COM N/C SLAVE 24 VAC 1 2 3 4 T T ZONE 1 EXPANSION MASTER T T ZONE 3 T T ZONE 4 T T ZONE 5 T T ZONE 6 OFF T STAT 1 VALVE 1 T STAT 2 VALVE 2 SIX ZONE ZONE VALVE CONTOL WITH OPTIONAL PRIORITY T STAT 3 VALVE 3 T STAT 4 VALVE 4 T STAT 5 VALVE 5 T STAT 6 END SWITCH B PUMP ZONE 1 1 2 3 4 END SWITCH A BOILER N/O COM N/C ZONE 6 RELAY TO CIRCULATOR OR BOILER AQUASTAT RELAY ZONE 2 1 2 3 4 ZONE 3 1 2 3 4 ZONE 4 1 2 3 4 ZONE 5 1 2 3 4 ZONE 6 1 2 3 4 JUMPER 3&4 JUMPER 3&4 DRY CONTACTS END SWITCH A BOILER T T ZONE 2 ZVC 406-EXP NORMAL FUSE 7 AMP MAX RESET ZONE 6 PRIORITY ON PLUG-IN CARDS MODE Installation of Optional System and/or DHW Circulator END SWITCH B PUMP INDIRECT WATER HEATER AQUASTAT OR THERMOSTAT 24 VAC POWER CONTROLS TACO, INC ZVC406-EXP 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER WHITE THERMOSTAT 24 VAC POWER IN 120 VAC INPUT BLACK FACTORY INSTALLED TRANSFORMER Wiring Diagram TO CIRCULATOR OR BOILER AQUASTAT RELAY 2 WIRE ZONE VALVE (NO END SWITCH) SYSTEM CIRCULATOR MOTOR 1 2 3 TACO 3 WIRE ZONE VALVE END SWITCH VALVE 6 POWER ON SEE NOTE PRIORITY ZONE 4 WIRE ZONE VALVE (POWER OPEN, SELF CLOSING) T T BOILER DHW CIRCULATOR (See Note) 120 VAC NEUTRAL HOT Operation/External Diagnostics: When any thermostat calls for heat, the appropriate zone valve is energized and the yellow light goes on. When the zone valve is fully open, the red light goes on and energizes the end switch relays. The green light should always be on, indicating that power is connected. Priority Operation: When zone 6 is switched to the priority setting and is actuated, all other zones will stop operation until zone 6 is satisfied. When zone 6 is not switched to priority, all zones will operate independently. Note: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone. Mode Operation: When the mode switch is set to NORMAL, both end switch relays will be energized if any zone is in operation. When the mode switch is set to RESET, the end switch relay “A” will only be energized when the priority zone is in operation. The end switch relay “B” will be energized when any zone is in operation Power Input: Connect 120 volt ac power input to leads on transformer. Neutral to white wire. Hot to black wire. Expansion Connections: Set the expansion switch to MASTER on the zone valve control that has the designated priority zone or is utilizing the PowerPort options. Set all other daisy chained controls to SLAVE. Connect thermostat wire (18-22 gauge) between terminals 1, 2, 3, 4 on the master control to the corresponding 1, 2, 3, 4 on the SLAVE control(s). Controls may be daisy chained up to 20 zones using any combination of Switching Relay -EXP or Zone Valve -EXP controls. The Taco Connection: Combine the reliability of the Taco Zone Valves, Priority Zoning Circulators, Thermostats, and the “00” family of circulators with the advanced features of the Taco Zone Controls to achieve total system integration. No matter the application, Taco now provides the products to maximize system performance while simplifying both installation and service. Specifications: PRODUCT NUMBER NUMBER OF ZONES ZVC404-EXP 4 with Priority ZVC406-EXP 6 with Priority TRANSFORMER VOLTAGE MAX OUTPUT AT 24 VAC 120 VAC Input 120 VAC Input 80 VA 80 VA DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 113⁄4" 113⁄4" 71⁄2" 71⁄2" 3" 3" All Zone Valve Controls are relay type DPDT and have a single phase motor rating per zone of 1⁄6 hp (5A) @ 120 VAC. Features: External Indicator Lights Plug-In PowerPort Cards Switchable Priority Simplified Wiring Add-On Power Controls Works with 2, 3, or 4-Wire Zone Valves UL Approved Fuse Protected 100% Factory Tested Isolated End Switch Expandable to 20 Zones Extra Set of Dry Contacts Contractor Friendly PC Board Layout Universal Thermostat Compatibility Sturdy Screw Connections Extended 3 Year Warranty Made in the USA Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2000 TACO, Inc. Visit our web site at: http://www.taco-hvac.com 95 Instruction Sheet Hydro Air Fan Controls To: Optional Aquastat on Return Line of Hydro Coil THERMOSTAT Optional Power Wire to Thermostat that Requires 24VAC 4 1 minute on fan delay, in heating mode 3 minute on fan delay, in heating mode 4 minute on fan delay, in heating mode Pump dry contact activated for 2 minutes every 24 hours (boiler contacts not activated) Pump dry contacts activated for 30 seconds every two weeks (boiler contacts not activated) External Diagnostics: The external lights show full functionality of the Hydro Air Fan Control. The green light should always be on, indicating that power is connected. Red lights indicate fan operation for heating and cooling modes. Warning: Wiring connections must be made in accordance with all applicable electrical codes. Use copper wire only. Failure to follow this instruction can result in personal injury or death and/or property damage. 10-18 gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22 gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge wire for 24 VAC source with 5 in.lbs. max torque. Specifications: Power On Call for Heat Fan, Cooling Fan, Heating Power On Call for Heat Fan, Cooling Fan, Heating HAFC101 HYDRO AIR FAN CONTROL DRY CONTACTS PUMP BOILER BOILER AIR HANDLER AIR HANDLER X X C R Y G G XX X X C R Y G G Jumper Hot M 1 Speed Air Handler* Line Dry Contacts To: “T T” on Boiler or Switching Relay High Dry Contacts To: “T T” on Boiler or Switching Relay Fan Relays Fan Relay Circulator Outdoor Condenser Unit Low 24 VAC (or to “T T” on switching relay) 24 VAC Neutral Outdoor Condenser Unit M 2 Speed Air Handler* * Both HAFC101 and 201 capable of 1 and 2 speed applications Terminal Description: Thermostat: C Optional: Common side of transformer W White - Heating signal to power some styles of thermostats Y Yellow - Condenser signal R Red - Hot side of transformer used to G Green - Fan signal switch all functions Water Coil Aquastat: TT Connect to aquastat at air handler to control operation of the fan when in the heating mode. Install a jumper if the aquastat is not used Freeze Protection Aquastat: TT Connect to aquastat or thermostat to sense low ambient temperature. Reduces the chance of pipes freezing by energizing the pump dry contacts. Pump Dry Contacts: XX May switch pump directly by bringing in external line voltage or connect to “T T” on a switching relay. Boiler Dry Contacts: XX Connect to the boiler or “T T” terminals on a switching relay. Air Handler: C Common side of transformer to power the Fan Control R Red - Hot side of transformer used to switch all functions Y Yellow - Condenser signal One Speed Motor: Glow Connect the fan to the relay. Keep the jumper installed between Ghigh and Glow. Two Speed Motor: Ghigh Remove jumper and connect Ghigh to the high speed fan relay and connect Glow to the low speed fan relay. ** Model number changed from SR501-F PRODUCT NUMBER POWER INPUT MAXIMUM RELAY THERMOSTAT SINGLE PHAZE MOTOR NUMBER OF ZONES VOLTAGE COMBINED LOAD TYPE CURRENT RATING (RELAY) HAFC101** 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC HAFC201•• 1 Zone 24 VAC Input 5 amps DPDT .18 1/6 HP(5A) @120VAC The Hydro Air Fan Controls are relay type DPDT, have a thermostat current of .18 and a single phase motor rating per zone of 1/6 DIMENSIONS OF ENCLOSURE WIDTH HEIGHT DEPTH 4 1/4" 5 1/4" 2 3/4" 4 1/4" 5 1/4" 2 3/4" HP (5A) @ 120 VAC. Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com 96 AQUASTAT 5 AMP 1/6 HP RATED 1 MIN ON DELAY - FAN 3 MIN ON DELAY - FAN 2 MIN @ 24 HR - PUMP 30 SEC @ 2 WK - PUMP 1 2 1&2 3 THERMOSTAT AQUASTATS HAFC201 HYDRO AIR FAN CONTROL ON Switch Settings (HAFC201): WATER COIL FREEZE PR THERMOSTAT To: Aquastat on Return Line of Hydro Coil Optional Power Wire to Thermostat that Requires 24VAC C R W Y G T T C R W Y G T T T T Additional HAFC201 Operations: Selectable one, three or four minute delay on fan operation in heating mode. Selectable pump exercise activates circulator but does not enable boiler contacts. Two minutes every 24 hours minimizes the chance of bacteria build-up in an open loop system. Thirty seconds every two weeks minimizes seasonal start-up problems generally associated with harsh water conditions. Optional aquastat or thermostat can be connected to Freeze Protection TT terminals to reduce the chance of pipes freezing by energizing the pump dry contacts (boiler contacts not activated.) To: Optional Aquastat or Thermostat to sense low ambient temperature OFF The Hydro Air Fan Control is an interface between the thermostat and air handler. It also has an isolated end switch to start the boiler and/or pump. When the thermostat calls for heat, the Fan Control energizes the end switch relay and allows the fan to operate at low speed when the water is above the optional aquastat setting. When the thermostat calls for cooling, the Fan Control energizes the condenser and operates on high speed. Line Operation HAFC101 and 201: THERMOSTAT Printed in USA Copyright 1999 TACO, Inc. Instruction Sheet 102-094 PC600 Post Purge Timer Plug-In PowerPort Card SUPERSEDES: August 1, 1997 Plant ID No. 9300-867 EFFECTIVE: May 1, 2000 Operation: Once the priority zone is satisfied, the PC600 maintains power to the circulator, but does not fire the boiler. The circulator purges excess heat into the priority zone, minimizing standby loss during warm weather months and optimizing boiler operation when used with a boiler reset control. Power can be maintained to the circulator from a minimum of 10 seconds to a maximum of 420 seconds. The power LED light is energized when the priority zone or the post purge card is in operation. Installation: The PC600 can be installed in any one of the PowerPort terminals located on the Taco Expandable (-EXP) Control(s). Remove the shunt/jumper between pins 9 & 10 on the PowerPort terminal before installing the PC600. Align the connector on the base of the post purge card with the PowerPort terminal on the Expandable Control and push until the two mate. XX Terminals (Optional): The XX terminals on the post purge card can be wired to TT on the boiler to fire only when the priority zone is calling for heat. If using a boiler with an internal reset control, wire the XX terminals in parallel with the TT connections of the internal reset control. Do it Once. Do it Right. Printed in USA TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Instruction Sheet Copyright 2000 TACO, Inc. 102-095 PC605 Priority Protection Plug-In PowerPort Card SUPERSEDES: MAY 1, 1998 PLANT ID NO. 9300-1012 EFFECTIVE: MAY 1, 2000 Operation: The PC605 Priority Protection Plug-In Card is a solid state control that helps prevent freeze-ups in the event of a priority zone failure. If the priority zone calls for heat continuously for more than one hour, power is returned to the space heating (non-priority) zones, allowing all zones to function independently. Once the priority zone is satisfied, the PC605’s auto-reset is activated and the priority zone is again allowed to have priority for up to one hour the next time it calls. The one hour time frame is not adjustable. The red LED light is energized only when the Priority Protection Card is operating in priority override mode. Installation: The PC605 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Control unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Control and push until the two mate. The PC605 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls. Do it Once. Do it Right. Printed in USA TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Instruction Sheet Copyright 2000 TACO, Inc. 102-096 PC610 Pump Exercise and Timer Plug-In PowerPort Card SUPERSEDES: May 31, 1998 Plant ID No. 9300-1025 EFFECTIVE: May 1, 2000 Operation: The PC610 Pump Exercise and Timer Plug-In Card is a solid state universal timer designed to cycle all the pumps that are attached to the Expandable Control(s) at selected time intervals. This minimizes seasonal start-up problems generally associated with harsh water conditions. The control can be configured to reduce the chance of freeze-ups by cycling the pumps more often during cold weather months. Bacteria can be minimized in heating systems that utilize domestic hot water heaters as their heat source by systematically circulating the water. Installation: The PC610 can be installed in any unoccupied PowerPort terminal located on the Taco Expandable (-EXP) Control(s). Do not remove the shunt between pins 9 & 10 on the Expandable Switching Relay unless a PC600 is also installed. Align the connector on the base of the priority protection card with the PowerPort terminal on the Expandable Switching Relay and push until the two mate. The PC610 can be used in conjunction with any other Taco PC style PowerPort Cards or Add-on Controls. Typical Settings: Application On Time Off Time Pump Exercise Bacteria Minimization Freeze Protection 30 sec. 4 min. 4 min. 2 weeks 12 hours 1 hour Do it Once. Do it Right. TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: 905/564-9422. FAX: 905/564-9436. Printed in USA Copyright 2000 TACO, Inc. 97 Standard Terms and Definitions Switching Relay: Transformer and relay in one box, which allows a low voltage thermostat to control a line voltage load (circulator), with an isolated end switch that can energize the boiler. Zone Valve Control: Transformer and relay in one box, which allows a low voltage thermostat to control a low voltage zone valve, with an isolated end switch that can energize the boiler and/or circulators. Dry Contacts: Set of relay contacts that make and beak, where no voltage is present. Usually can switch 24 or 120 VAC. Isolated End Set Switch: Set of dry contacts that make when a zone calls for heat. Usually connected to a boiler’s aquastat TT. Mode Switch: Switch set to NORMAL – When any zone calls for heat, the end switch will make and fire the boiler. Switch set to RESET – When any zone calls for heat, a heat demand signal is given to external add-on reset control and it controls boiler operation.Also when the priority zone calls for heat and is switched to priority, the end switch will override reset control and fire boiler to high limit. TT: Where thermostat or aquastat connects on a heating control. XX: Denotes Isolated End Switch. Low Voltage: 24 VAC for most HVAC systems. Line Voltage: Normally 120 VAC relative to ground. H or L1: Hot side of line voltage. N or L2: Neutral side of line voltage. ZR: 120 VAC (Hot) signal from switching relay to boiler’s operating aquastat to fire the burner to high limit when any zone calls for heat. Also ideal for controlling primary circulator. ZC: 120 VAC (Hot) signal from boiler’s operating aquastat to switching relay allowing circulator(s) to run when aquastat is above the set low limit. Cold Start: A boiler that fires only when there is a call for heat. Tankless Coil: A method of heating domestic water utilizing a heat exchanger inside a boiler.The boiler also maintains heat year round to deliver hot water on demand. DHW Heater: A method of heating domestic water utilizing a heat exchanger and storage tank. Transformer: A component for increasing or reducing AC voltage. Rated in VA (volts x amps). OHMS Law: Example: A 24 volt, 40 VA transformer can produce how much current? Current = VA / Voltage I = E/R R = E/I E=IxR W=ExI I = W(VA)/E where 40 / 24 = 1.6 Amps I = Current in Amps R = Resistance in Ohms E = Volts W = Watts or VA RELAY CONTACTS: N/C: Normally closed connection of a relay, when not energized. N/O: Normally open connection of a relay, when not energized. Com: The common terminal for normally open and normally closed. Pole: The number of independent circuits of a switch or relay. Throw: The number of settings which a switch or relay can have. DPDT = Double Pole Double Throw 98 3 4 4 6 6 5 COM N/O N/C N/C N/O COM Zone Zone Zone Zone Zone Zone Switching Switching Switching Switching Switching Switching Relay Relay Relay Relay Relay Relay (DPDT) Replacement PC Board (DTSP) with Priority with Priority with Priority with Priority Zone Valve Zone Valve Zone Valve Zone Valve Control Control with Priority Control Control with Priority Post Purge Timer Plug-In Card Priority Protection Plug-In Card Universal Timer/Pump Exercize Plug-In Card PLUG IN POWERPORT CARDS 4 Zone Valve Control with Priority and 2 Power Ports 6 Zone Valve Control with Priority and 2 Power Ports ZONE VALVE CONTROLS WITH POWERPORT OPTIONS 3 4 5 6 ZONE VALVE CONTROLS 3 Zone Switching Relay with Priority and 3 Power Ports 4 Zone Switching Relay with Priority and 3 Power Ports 6 Zone Switching Relay with Priority and 3 Power Ports SWITCHING RELAYS WITH POWERPORT OPTIONS 1 1 2 3 4 6 SWITCHING RELAYS 99 (7) (7) (7) (7) PC600 PC605 PC610 ZVC404-EXP ZVC406-EXP ZVC403 ZVC404 ZVC405 ZVC406 SR503-EXP SR504-EXP SR506-EXP SR501 SR501-845RP SR502 SR503 SR504 SR506 TACO DPM-1 AZ-3 AZ-4P AZ-5 AZ-6P ARM-861-DP (5,6), ARM-3P ARM-842-DP (5,6), ARM-4P ARM-866-DP (5,6), ARM-6P AR-861-2 (3) AR-861-3 (3) AR-842 AR-866 AR821 (1), AR822 ARGO VL500 (8) VL500 (8) SR201 SR301 SR601 SR601 (4) SR100 ERIE HONEYWELL R8889A1014 R8889B1012 R8888A1007 R8888B1005 RA89A (2), RA845A (1), RA832A (1) TACO Zone Controls Cross-Reference 889-189 (2), 829-845 (1) WHITE-ROGERS SR024-001RP SR120-001RP R-35 R-49 ARH-1, ARH-2, ARH-3 DPM-2 ARGO EXP10 WA300 BB3000 BB1200 ERIE 1. Does not have both normally open and normally closed contacts. 2. Has only one set of normally open contacts (SPST). 3. Does not have optional priority. 4. Can be expanded to five and six zones with the addition of EXP10 relays. 5. Argo ARM units are expandable to 10 zones using special controls (ARM-1, ARM-4) with a phone jack. TACO switching relays can be expanded up to 20 zones using any combination of -EXP models with no special connections. 6. Includes only one data port for adding data port modules. 7. All TACO zone valve controls include an extra set of dry contacts (N/O, Common, N/C). 8. VL500 is only 5 zones, 4 normal and 1 priority. NOTES: 24 Volt Replacement Relay 120 Volt Replacement Relay REPLACEMENT PARTS HAFC101 HAFC201 PC700 PC702 PC705 TACO HONEYWELL TACO Zone Controls Cross-Reference (Continued) 1 Zone Hydro Air Fan Control (1 or 2 Speed) 1 Zone Hydro Air Fan Control with Time Delays (1 or 2 Speed) FAN CONTROLS Boiler Reset Control 2-Stage Boiler Reset Control Variable Speed Pump Injection Mixing Control ADD-ON POWER CONTROLS 100 WHITE-ROGERS CONTROLS MADE EASY.® TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360. TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436. Visit our web site at: http://www.taco-hvac.com Printed in USA Copyright 2010 TACO, Inc.