Universal Electronic Aquastat® L7224U1002 Training Module Includes Honeywell’s AquaReset® Outdoor Reset Solution What you will learn • L7224U Product Overview • Key Features • Installation • Set Up • Troubleshooting • Product Cross Reference • L7224U Advantages 2 L7224U Universal Electronic Aquastat® • What is the L7224U1002? - Universal electronic Aquastat that provides circulator, burner and boiler temperature control with electronic temperature sensing in an oil fired hydronic heating appliance. - Provides status and diagnostic information through an LED display to enhance the diagnostic process. One part number: L7224U1002 3 Aquastat® Key Features Electronic Aquastat® L7224U1002 • Triple Aquastat (High, Low, Circulator Control) • Outdoor reset ready • EnviraCOM™ communications enabled • Electronic configuration • Diagnostic updates through LED Display • Provides multizone control 4 • Horizontal or vertical flange mounting L7224U Universal Electronic Aquastat • Why choose the Honeywell L7224U1002? • Universal Compatibility • Replaces over 40 existing Honeywell controls • Easy Installation • Redesigned to simplify wiring • Direct or remote mount • Superior Performance and Accuracy • +/- 2 degree accuracy • Multi-Function LED Display • Speeds installation and troubleshooting • Push button product set up & configuration • Get set point, temperature and diagnostic info • EnviraCOMTM communications enabled • Easily add outdoor reset with 3 wires • Remote diagnostics • OnWatch Diagnotic compatible 5 Additional L7224U features •Remote 48” sensors available •One Amp slow-blow fuse •Improved terminal layout and multiple knockouts •Vertical, Horizontal, and Flush-Mounting - configurable for singlefunction use •Low Limit can be disabled (cold start boiler applications) •Outdoor reset functionality enabled when combined with W8735S1000 AquaReset® kit 6 L7224U Features Enviracom™ Terminals Flush Mounting Tabs (2) Push Buttons – Configuration Thermostat Terminals & Access Diagnostic Information EnviraCOM Data port Digital Display Line Voltage Terminals Keyed Sensor Connector Capacitor Multiple Sensor Holes Transformer Fuse Relays 7 Ranges and Ratings • Setting Ranges +/-2 Degree Accuracy 130 – 240°F - High Limit: - High Limit Differential (new feature): - Low Limit: - Low Limit Differential: 5 – 20°F 110 – 220°F 10 – 25°F • Electrical Ratings - Voltage: Burner: Circulator: Zone Controller (ZC): 120 VAC 60 HZ 7.4 Amps 7.4 Amps 7.4 Amps • Environmental Ratings - Temperature: - Humidity: 8 -30 °F to 150 °F 0 to 95% relative humidity Installation Wiring of the L7224U Well mounting PN 50001464-001 12 in. Included in the box Keyed sensor connector plugs into circuit board 10 Flush mounting PN 50001464-005 48 in. Wiring of the L7224U -- Thermostat Thermostat Terminals T T 3 2 1 Enviracom™ Terminals Connect AquaReset® and other Enviracom devices 11 Wiring of the L7224U – Line Voltage Line Voltage Terminals 12 ZR Power from zone relay to burner L1 Power hot L2 Power neutral C2 Circulator common B2 Burner common C1 Circulator hot B1 Burner hot ZC Power to zone circulator relay Connecting AquaReset® Thermostat Terminals T T 3 2 1 Enviracom™ Terminals Wire 1,2,3 terminals on Aquastat to 1,2,3 terminals to the Outdoor Reset Module 13 Connecting AquaReset® Enviracom™ Terminals 1 2 3 OT OT Outdoor Sensor Terminals Wire 1,2,3 terminals on Aquastat to 1,2,3 terminals to the Outdoor Reset Module. Mount outdoor sensor Outside and connect wires to the OT terminals 14 Set Up Set Up of the L7224U • - • To adjust the settings Press the UP, DOWN, and I buttons simultaneously for three seconds Press the I button until the desired feature is displayed Then press UP and/or DOWN to move the set points to desired values After 60 seconds without any buttons pressed, the control automatically goes back to READ mode Display - In RUN mode the Aquastat will flash boiler temp (bt) followed by the temperature To read settings press the I key to scroll thought the functions Increase value of setting Decrease value of setting I 16 Cycles through Settings & conditions Set Point Adjustments Increase value of setting Decrease value of setting I 17 Cycles through Settings & conditions L7224U Electronic Aquastats® (LED LIGHTS) EnviraCOM Network Active Thermostat Calling Burner Energized 18 Power to Zone Circulator Interrupted Circulator Powered Digital Readout of System Conditions Run mode – display shows boiler temperature LED display Push “I” button to see other values 19 Text Description bt Boiler Temperature HL High Limit LL Low Limit Hdf High Limit Differential Ldf Low Limit Differential tt Local Thermostat Status tte Enviracom Thermostat Status brn Burner Status cir Circulator Status Zc Zone Control Zr Zone Request err Error Code °f Degrees Fahrenheit °c Degrees Celsius Display Shows Digital Readout of System Outdoor Reset Functions The following messages are only available when connected to a W8735S1000 outdoor reset kit and/or W8735S1008 domestic hot water priority kit LED display Text Description duu ZR configured as Domestic Hot Water Request ASC Anti Short-Cycle timeout bSP Boiler Setpoint dhc DHW module connected Push “I” button to see other values 20 ot Outdoor temperature otL Outdoor temperature low otH Outdoor temperature high btL Boiler temperature low bP Boost Period bS Boost step UUS Warm weather shutdown temperature Display Shows L7224U Electronic Aquastats® (Digital Readout of System Conditions) Run mode – display shows boiler temperature LED display Technicians Quick Reference Guide #69-1957 Push “I” button to see other values 21 Troubleshooting Troubleshooting: L7224U Electronic Aquastats® (Error Codes) • Is there an error code on the display? Error Code • Err 1 • Err 2 • Err 3 • Err 4 • Err 5 • Err 6 • Err 7 • Err 8 23 Cause/Action Sensor fault; check sensor ECOM fault; check EnviraCOM™ wiring Hardware fault; replace control B1 fault; check B1 wiring/voltage Low line voltage; check L1-L2 110 Vac Fuse; check ECOM wires, replace fuse EEPROM, HL, LL, Hdf, Ldf; Reset to default values. Restore desired settings. Repeated B1 fault (voltage present at B1 when output is turned off); check B1 wiring/voltage Troubleshooting: L7224U Electronic Aquastats® (AquaReset Error codes) • Is there an error code on the display? Error Code • Err 9 • Err 10 • Err 11 Cause/Action Outdoor reset system failure, check wiring Boost Failure, check outdoor reset curve settings Domestic Hot Water module failure, check wiring • Error codes 9, 10 and 11 only apply when AquaReset and/or Domestic Hot Water priority modules connected to Aquastat 24 Troubleshooting: L7224U Electronic Aquastats® On Watch QuickLookTM 72 • 25 For Honeywell EnviraCOM™ enabled equipment - Read EnviraCOM™ Error Codes - Line Voltage - Aquastat Well Temperature - The QuickLookTM 72 is available through www.onwatchinc.com Product Cross Reference Product Cross Reference • Where do I find Honeywell universal electronic aquastat cross reference information? - www.customer.honeywell.com - Honeywell Application Selection and Cross Reference Guide – Form 63-9575 - Honeywell Laminated Truck Visor – Form 63-9581O - Honeywell Residential Technical Support: 1-800-468-1502 63-9581O 27 63-9575 Aquastat® Cross Reference Table This chart can be found in the Residential Combustion Application Guide: Form #63-9575 28 www.customer.honeywell.com • See Cross Reference Search box in right column. 29 L7224U Advantages • When promoting the Honeywell L7224U1002 keep these advantages in mind: • This Universal control replaces over 40 existing Honeywell controls. • Save time searching for the exact replacement parts • Stock less parts on the shelf and in the truck • Installation is easy with this redesigned control. • Wiring has been simplified • Mounting choices - control can be direct or remote mount • Performance and accuracy are superior to past controls. • +/- 2 degree accuracy • The multi-function LED display means less time spent on installation and troubleshooting. • Push button product set up & configuration • EnviraCOMTM communications enabled is an added advantage providing remote diagnostic capabilities. 30 L7224U Universal Electronic Aquastat Knowledge Test • Now that you completed this training module, take the short quiz to test your knowledge. 31 Test 1. The L7224U provides temperature control of circulators, burners and boilers with electronic temperature sensing? T of F 2. The L7224U is considered a single function aquastat which provides high limit and low limit control? T or F 3. The L7224U is accurate within +/- 2 degrees? T or F 4. A 48” sensor is available to accommodate application requirements? T or F 5. Setpoints are easily adjusted with the up and down push buttons? T or F 32 Test 6. The “I” button cycles through settings and conditions? T or F 7. Error codes can be read only through the LED display? T or F 8. The low limit can be disabled for a cold start boiler application? T or F 9. Honeywell provides cross reference information for replacing over 40 existing controls? T or F 10.The L7224U has a LED light that shows whether the burner is energized? T or F 33 Answer Key 1. T 2. F 3. T 4. T 5. T 6. T 7. F 8. T 9. T 10. T 34