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Universal Electronic Aquastat® L7224U1002 Training Module Includes Honeywells AquaReset® Outdoor Reset Solution.

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Presentation on theme: "Universal Electronic Aquastat® L7224U1002 Training Module Includes Honeywells AquaReset® Outdoor Reset Solution."— Presentation transcript:

1 Universal Electronic Aquastat® L7224U1002 Training Module Includes Honeywells AquaReset® Outdoor Reset Solution

2 2 What you will learn L7224U Product Overview Key Features Installation Set Up Troubleshooting Product Cross Reference L7224U Advantages

3 3 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

4 4 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 Horizontal or vertical flange mounting

5 5 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 EnviraCOM TM communications enabled Easily add outdoor reset with 3 wires Remote diagnostics OnWatch Diagnotic compatible

6 6 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 single- function use Low Limit can be disabled (cold start boiler applications) Outdoor reset functionality enabled when combined with W8735S1000 AquaReset® kit

7 7 L7224U Features Thermostat Terminals Digital Display Capacitor Keyed Sensor Connector Transformer Fuse Relays Flush Mounting Tabs (2) Line Voltage Terminals Push Buttons – Configuration & Access Diagnostic Information EnviraCOM Data port Multiple Sensor Holes Enviracom Terminals

8 8 Ranges and Ratings Setting Ranges +/-2 Degree Accuracy -High Limit:130 – 240°F -High Limit Differential (new feature): 5 – 20°F -Low Limit:110 – 220°F -Low Limit Differential: 10 – 25°F Electrical Ratings -Voltage: 120 VAC 60 HZ -Burner: 7.4 Amps -Circulator: 7.4 Amps -Zone Controller (ZC):7.4 Amps Environmental Ratings -Temperature: -30 °F to 150 °F -Humidity: 0 to 95% relative humidity

9 Installation

10 10 Wiring of the L7224U Keyed sensor connector plugs into circuit board Well mounting PN in. Included in the box Flush mounting PN in.

11 11 Wiring of the L7224U -- Thermostat Thermostat Terminals TTTT Enviracom Terminals Connect AquaReset® and other Enviracom devices

12 12 Wiring of the L7224U – Line Voltage Line Voltage Terminals 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

13 13 Connecting AquaReset® Thermostat Terminals TTTT Enviracom Terminals Wire 1,2,3 terminals on Aquastat to 1,2,3 terminals to the Outdoor Reset Module

14 14 Connecting AquaReset® 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 Enviracom Terminals 123 OT

15 Set Up

16 16 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 I Increase value of setting Decrease value of setting Cycles through Settings & conditions

17 17 Set Point Adjustments I Increase value of setting Decrease value of setting Cycles through Settings & conditions

18 18 L7224U Electronic Aquastats® (LED LIGHTS) Thermostat Calling EnviraCOM Network Active Power to Zone Circulator Interrupted Circulator Powered Burner Energized

19 19 Digital Readout of System Conditions Run mode – display shows boiler temperature Push I button to see other values LED display Display Text Description Shows bt Boiler Temperature HLHigh Limit LLLow Limit HdfHigh Limit Differential LdfLow Limit Differential ttLocal Thermostat Status tteEnviracom Thermostat Status brnBurner Status cirCirculator Status ZcZone Control ZrZone Request errError Code °fDegrees Fahrenheit °cDegrees Celsius

20 20 Display Text Description Shows duuZR configured as Domestic Hot Water Request ASCAnti Short-Cycle timeout bSPBoiler Setpoint dhcDHW module connected otOutdoor temperature otLOutdoor temperature low otHOutdoor temperature high btLBoiler temperature low bPBoost Period bSBoost step UUSWarm weather shutdown temperature Digital Readout of System Outdoor Reset Functions Push I button to see other values LED display The following messages are only available when connected to a W8735S1000 outdoor reset kit and/or W8735S1008 domestic hot water priority kit

21 21 L7224U Electronic Aquastats® (Digital Readout of System Conditions) Push I button to see other values LED display Run mode – display shows boiler temperature Technicians Quick Reference Guide #

22 Troubleshooting

23 23 Is there an error code on the display? Error CodeCause/Action Err 1Sensor fault; check sensor Err 2ECOM fault; check EnviraCOM wiring Err 3Hardware fault; replace control Err 4B1 fault; check B1 wiring/voltage Err 5Low line voltage; check L1-L2 110 Vac Err 6Fuse; check ECOM wires, replace fuse Err 7EEPROM, HL, LL, Hdf, Ldf; Reset to default values. Restore desired settings. Err 8Repeated B1 fault (voltage present at B1 when output is turned off); check B1 wiring/voltage Troubleshooting: L7224U Electronic Aquastats® (Error Codes)

24 24 Is there an error code on the display? Error CodeCause/Action Err 9Outdoor reset system failure, check wiring Err 10Boost Failure, check outdoor reset curve settings Err 11Domestic 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 Troubleshooting: L7224U Electronic Aquastats® (AquaReset Error codes)

25 25 Troubleshooting: L7224U Electronic Aquastats® For Honeywell EnviraCOM enabled equipment - Read EnviraCOM Error Codes - Line Voltage - Aquastat Well Temperature - The QuickLook TM 72 is available through On Watch QuickLook TM 72

26 Product Cross Reference

27 27 Product Cross Reference Where do I find Honeywell universal electronic aquastat cross reference information? - - Honeywell Application Selection and Cross Reference Guide – Form Honeywell Laminated Truck Visor – Form O - Honeywell Residential Technical Support: O

28 28 Aquastat® Cross Reference Table This chart can be found in the Residential Combustion Application Guide: Form #

29 29 See Cross Reference Search box in right column.

30 30 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 EnviraCOM TM communications enabled is an added advantage providing remote diagnostic capabilities.

31 31 L7224U Universal Electronic Aquastat Knowledge Test Now that you completed this training module, take the short quiz to test your knowledge.

32 32 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

33 33 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

34 34 Answer Key 1.T 2.F 3.T 4.T 5.T 6.T 7.F 8.T 9.T 10.T


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