DuroZone ®
130 Route 110, Farmingdale, NY 11735 (516) 249-9000 FAX: (516) 249-8346
DuroZone®
130 Route 110, Farmingdale, NY 11735 (516) 249-9000 FAX: (516) 249-8346
SMZ-HPSW OPERATION
SMZ-HPSW SYSTEM CHECKOUT PROCEDURE
DuroZone's SMZ-HP Panels are designed to work with most standard heat pump thermostats on Zone 1 provided they have a "B"
terminal that makes in the heat mode, an "O" terminal that makes in the cool mode, and an "E" terminal that makes in the emergency
heat mode.
The following check-out procedure requires a voltmeter set to read 24 volts A.C.. If, after the check-out procedure is completed,
the SMZ-HP panel and dampers are operating correctly, but the system is not functioning properly, check your wiring carefully. The
most common problems experienced are a misplaced wire, a bad connection, or a broken wire. If none of these seem to be the
problem, check your thermostats and equipment. YOU MUST PERFORM THE FOLLOWING TEST PROCEDURES IN THE
ORDER SHOWN. DO NOT SKIP ANY OF THESE STEPS.
The SMZ-HP is a simple zoning system incorporating individual thermostats and zone dampers to provide comfort and economy.
The Zone One thermostat has a subbase which acts as the master control to determine if heating or cooling is desired and if the
fan should be on constantly or just when the equipment is called for. It is important to note that the Zone One thermostat switch only
determines what mode the system is in. It is not necessary for Zone One to be calling before other zones can get heating or cooling.
All thermostats have the capability to turn on the equipment as selected by the Zone One subbase.
When all zones are satisfied, each zone damper will be in the position set by the damper switch, (see below). If any zone calls, that
damper will open, or remain open, and all others will close. Should another zone call, its corresponding damper will open. Upon
satisfaction of the zone(s) all dampers will return to the position set with the damper switch, (see below).
With a call in the heat mode, "R" makes to "Y" in the equipment section, activating the compressor relay, and "R" makes to "G"
activating the fan. "R" will also make to "B" to activate the reversing valve if the heat pump operates as such.
With a call in the cool mode, "R" makes to "Y" activating the compressor and "R" makes to "G" activating the fan. "R" will also make
to "O" to activate the reversing valve if the heat pump operates as such.
2nd Stage Heating and Cooling (Compressor)
Any connection between "R" and "W2" in any zone will turn on 2nd stage heat. "R" to "W2" in the equipment section will be made.
Any connection between "R" and "Y2" in any zone will turn on a second stage of cooling or compressor operation. "R" to "Y2" in
the equipment section will be made.
Emergency Heat Mode
When the Zone One subbase is switched to Emergency Heat "R" makes to "E" pulling in the Emergency Heat relay on the SMZHP panel. Any call for heat will automatically be directed to the 2nd stage heat connected to W2 in the equipment section.
Fan Operation
When the fan switch on the Zone One subbase is in the "on" position, "R" makes to "G" and the fan provides constant air circulation.
NOTE: If all damper switches are set in "closed" "(C)" position, the fan will not operate in the "Fan On" position.
DAMPER SWITCHES
The SMZ-HPSW Zone Systems are equipped with individual zone damper control switches. These switches are located to the left
of the zone relays; one switch per zone. These switches will allow a zone damper to remain in either the open or closed position
when the system board is at rest. The SMZ-HPSW allows the installer or home owner to choose the position of his system’s dampers,
to inhibit migration of air into spaces not desired, for seasonal purposes, or when a zone is not in use.
The SMZ-HPSW Zone System has a built-in safety feature. At least one zone damper switch must be in the open position for the
“fan on” switch on the master thermostat to be operational. If all switches are set to “closed” (c), the constant fan circuit is disabled.
This safety feature removes the possibility that the air handler could be damaged due to cavitation, or by a restricted air distribution
system.
C
C
O
Damper is open
when zone is satisfied.
O
Damper is closed
when zone is satisfied.
1- You must have 24 volts across R & C of the SMZ-HP Panel Equipment Terminal Strip. (This powers the SMZ-HP panel and
your equipment.).
2- You must have 24 volts across 1 & 2 of the SMZ-HP Panel Equipment Terminal Strip, and every 1 & 2 of each SMZ-HP Panel
Zone terminal. (This powers the dampers.).
3- To test the operation of the SMZ-HP panel, you must disconnect all thermostats. With the thermostats disconnected, and 24
volts as described in #2 above, all dampers should be open. (If the dampers are not open, go to step 4.).
3A- To test the heat mode, connect R & B at the Zone 1 terminal strip. This sets the panel to heat. Zone 1 will be activated when
you jump R and Y at the Zone 1 terminal strip. (All zone dampers except Zone 1's will close and the heat pump will come on. Zone
2 or Zone 3 can be activated by jumping R & W1 at the corresponding zone terminal strip.
If the heat pump does not activate, with R & B connected and R & Y jumped in zone 1 (or R & W1 in Zones 2 and 3) test for 24 volts
across C & Y, 24 volts across C & B, and 24 volts across C & G at the SMZ-HP equipment terminal strip. If voltages are all 24 volts,
panel is okay.
SMZ-HPSW Heat Pump Control Panel configured for up to three zones.
35171:
Dual Bulb 2 Stage Thermostat for use on Zones 2 and 3. Will operate 2 stages of heating and 2 stages of cooling.
3C- To test the emergency heat mode, connect R & B and R & E at the Zone 1 terminal strip. This sets the panel to emergency
heat mode. Zone 1 will be activated when you jump R & Y at the Zone 1 terminal strip. (All zone dampers except zone 1's will close
and the 2nd stage heat and fan will come on. Zone 2 or Zone 3 can be activated by jumping R & W1 at the corresponding zone terminal
strip.
If the 2nd stage heat does not activate, with R & B and R & E connected and R & Y jumped in Zone 1, (or R & W1 in zones 2 & 3),
test for 24 volts across C and W2, 24 volts across C & B, and 24 volts across C & G at the SMZ-HP equipment terminal strip. If voltages
are all 24 volts, panel is okay.
3D- To test the Fan, jump R & G at the SMZ-HPSW Panel Zone 1 Terminal Strip. Be sure at least one damper switch is in "open"
(O) position. The fan should activate. If the fan does not activate, with R & G jumped, test for 24 volts across C & G at the SMZ panel
equipment terminal strip. If voltage reading is 24, panel is okay.
4- To test the damper operation, perform step #3A, checking for 24 volts across 1 & 4 of every SMZ-HP Panel Zone Terminal
Strip when that zone is activated, and for "0" volts at 1 & 4 of every SMZ-HP Panel Zone Terminal Strip that is not activated.
(IMPORTANT: This test will work only if at least one zone is activated. If no zone is activated, all terminal 1 & 4 readings will be 24
volts.). If all readings are correct, the panel is operating correctly. If a damper is not functioning but the SMZ-HP Panel has checked
out okay, check for 24 volts across terminals 1 & 2 on the damper motor. If you have 24 volts, disconnect the terminal 4 connection
to the damper motor. Connect damper motor terminals 4 & 5 and the damper should open. (It will take 30 to 60 seconds for a damper
to fully open.). When you disconnect damper motor terminals 4 & 5 the damper should close. If the damper tested does not operate
as described, the problem could either be binding damper linkage, the blade movement is being obstructed, or you could have either
an incorrect or a defective motor. (With multiblade dampers, it is possible to connect the motor to the linkage 180 "out of phase",
which causes the damper to be open when it should be closed, and closed when it should be open.).
DuroZone
DURO
DYNE
35176: SMZ-HP Master Heat Pump Thermostat. For Zone 1 of the SMZ-HP. Features two stage heat and single stage cool,
B and O terminals for system switchover and an E terminal for Emergency Heat.
SMZ-HPSW WIRING INSTRUCTIONS PAGE 4
MODEL SMZ-HPSW
ZONE CONTROL SYSTEM
for Heat Pumps
Part# 35217
3B- To test the cool mode, connect R & O at the Zone 1 terminal strip. This sets the panel to cool. Zone 1 will be activated when
you jump R & Y at the Zone 1 terminal strip. (All zone dampers except Zone 1's will close and the heat pump will come on. Zone
2 or 3 can be activated by jumping R & W1 at the corresponding zone terminal strip.
If the heat pump does not activate, with R & O connected and R & Y jumped in zone 1 (or R & W1 in zones 2 & 3) test for 24 volts
across C & Y, 24 volts across C & O, and 24 volts across C & G at the SMZ-HP equipment terminal strip. If voltages are all 24 volts,
panel is okay.
ORDERING INFORMATION
35217:
DuroZone
SMZ-HPSW WIRING INSTRUCTIONS PAGE 5
©1997 DURO DYNE CORPORATION 4/97
®
is a division of:
Corporation
130Route 110
Farmingdale, NY 11735
®
DuroZone®
130 Route 110, Farmingdale, NY 11735 (516) 249-9000 FAX: (516) 249-8346
SMZ-HPSW INSTALLATION INSTRUCTIONS
Congratulations on purchasing a Duro Zone SMZ-HP Control System. The SMZ-HP Panel together with Duro Zone Multiline
Dampers will provide year- round comfort for your customer. Following are simple step-by-step installation instructions and wiring
diagrams for the SMZ-HP System.
For your convenience, your SMZ-HP System is shipped 'knocked down." Do not mount circuit board to box before attaching box
to wall or the mounting holes will be inaccessible.
1234-
Mount Panel Box to any flat surface.
Mount Circuit Board to Panel Box with nylon
standoffs provided.
Strip wires and attach to respective terminals (Panel
cover has wire stripping edges formed into it).
Snap cover onto Panel Box.
WIRING
Your SMZ-HP Panel has distinct terminal strips for wiring. Simply follow the instructions below using the wiring diagram included
for reference.
EQUIPMENT
The upper left terminal strip is for wiring the equipment to the SMZ-HP Panel.
FROM TOP TO BOTTOM:
Terminal "C" goes to the "C" or common side of the equipment transformer.
Terminal "R "goes to the "R" or hot side of the equipment transformer.
Terminal "Y" goes to the compressor relay (Y or Y1).
Terminal "G" goes to the fan relay (G).
Terminal "B" goes to the changeover valve if activated in the heat mode (B).
Terminal "O" goes to the changeover valve if activated in the cool mode (O).
Terminal "W2" goes to the 2nd stage heat relay (strip heaters) (W or W2).
Terminal "Y2" goes to the 2nd stage compressor relay (Y2).
Terminals 1 and 2 go to a separate 24 volt transformer to power the DuroZone dampers. Polarity does not matter. DuroZone's
PT-40 24 volt 40va transformer, (part# 35054) is recommended.
ZONE 1
The terminal strip below the equipment strip is for wiring the Zone 1 thermostat. The Zone
1 thermostat must have system switches for heat/off/cool/emergency heat and fan on/auto.
The Zone 1 thermostat must also have a "B" terminal that makes in the heat mode, an "O"
terminal that makes in the cool mode, and an "E" terminal that makes in the emergency heat
mode. DuroZone's SMZ-HP Master Heat Pump Thermostat (Part# 35176) is recommended.
FROM TOP TO BOTTOM:
SMZ-HP Terminal "CX" goes to the common connection of the Zone 1 Thermostat
(traditionally labeled "C" or "X").
SMZ-HP Terminal "R" goes to "R" of the Zone 1 Thermostat.
SMZ-HP Terminal "Y" goes to "Y" or "Y1" of the Zone 1 Thermostat.
SMZ-HP Terminal "G" goes to "G" of the Zone 1 Thermostat.
SMZ-HP Terminal "B" goes to "B" of the Zone 1 Thermostat.
SMZ-HP Terminal "O" goes to "O" of the Zone 1 Thermostat.
SMZ-HP Terminal "E" goes to "E" of the Zone 1 Thermostat.
SMZ-HP Terminal "W2" goes to "W2" or "W" of the Zone 1 Thermostat.
SMZ-HP Terminal "Y2" goes to "Y2" of the Zone 1 Thermostat.
SMZ-HPSW WIRING INSTRUCTIONS PAGE 1
ZONE 2 & ZONE 3
The upper right terminal strip is for Zone 2; Zone 3 is
located below the Zone 2 damper terminal strip.
FROM TOP TO BOTTOM:
SMZ-HP Terminal "W2" goes to "W2" of the Zone
Thermostat.
SMZ-HP Terminal "W1" goes to "W1" or "W" of the
Zone Thermostat.
SMZ-HP Terminal "R" goes to "R" of the Zone Thermostat.
SMZ-HP Terminal "Y1" goes to "Y1" of the Zone Thermostat.
SMZ-HP Terminal "Y2" goes to "Y2" of the Zone Thermostat.
DAMPER MOTORS:
SMZ-HP Terminal "M1" goes to Zone Damper Terminal 1.
SMZ-HP Terminal "M2" goes to Zone Damper Terminal 2.
SMZ-HP Terminal "M4" goes to Zone Damper Terminal 4.