White Rodgers 37E73A-918 Thermostat User Manual
Contents
1. O O O O O 7 found a problem with the and then back on gas valve driver circuit If the above step did not cleat the error the INTEL LI VENT control must be replaced vv A B C The self diagnostic test has 1 Cycle the external power off for 10 seconds and 000000 8 detected a problem with then back on the internal microcomputer 2 If the above step does not clear the error the INTELLI VENT control must be replaced v A B C The self diagnostic test has 1 Cycle the external power off for 10 seconds and 0000090 9 detected a problem with then back on the internal circuit If the above step does not clear the error the INTELLI VENT control must be replaced v A B C Flame signal sensed out of 1 Replace the INTELLI VENT control e0000e0 10 proper sequence vA B c The high temperature ther 1 Replace the INTELLI VENT control 11 cutoff is open ecoc54ees 0 vV A B c The diagnostic test has de 1 Make sure that there are no objects leaning against 12 tected one of the tempera the front of the control 000000 ture adjust buttons stuck Lightly press and release each of the buttons once closed If the above actions do not clear the error the control will continue to regulate water temperature at the last setting but you not be able to change settings unless you replace the INTELLI VENTTM control vA B c The self diagnostic test Check that all wiring is correct and that there are no 13 has detected2. 37E Intelli Vent Control Outlet Pressure Regulator Adjust Tower 1 8 Threaded Outlet Pressure Tap 36G Valve Figure 2 Pressure port and regulator adjust locations Regulator Cover Screw Sy A Plastic Adjust Screw y Regulator e Spring Figure 3 INSTALLATION OPERATING INSTRUCTIONS 1 The control uses an automatic ignition system to light the burner DO NOT TRY TO MANUALLY LIGHT THE BURNER 2 Wait at least five 5 minutes to clear out any gas and then smell around the appliance area near the floor If you smell gas STOP Follow the instructions What to do if you smell gas on the first page of this instruction sheet If you do not detect gas continue with the next step 3 Make sure that both the inner and outer doors are in place These doors are located where the burner tube enters the water heater at the bottom Both doors must be in place for safe operation 4 Turn on power to the water heater This can be done either by turning on the disconnect switch to the water heater or plugging in the water heater to a nearby outlet The in staller should have made this provision for you and it must meet local and state ordinances or the National Electric Code whichever applies 5 For a brief time one to five seconds all of the indicators on the front of the control should come on and then turn off This indicates that the control has completed the self diagnostic test and is ready for oper
3. is now completely shut down 3 To restart the water heater follow the instructions in the section Operating Instructions There are no user serviceable parts in this control The control is supplied with tamper resistant screws DO NOT attempt to repair or adjust the control If you experience prob lems discontinue use and replace the control immediately Continuing to use a damaged control could result in fire and or explosion Service If you wish to verify that the water heater is operating properly 1 Make sure there is power to the water heater 2 Make sure that the gas is turned on to the water heater 3 Initiate a call for heat by either drawing hot water from a nearby faucet or raising the temperature setting see sec tion Temperature Regulation 4 Watch the ignition sequence and compare it to the Se quence of Operation chart on page 7 5 Note any error codes that appear and proceed to the next section Troubleshooting WIRING DIAGRAM A typical system wiring diagram is shown below Use the installation Always follow the instructions supplied with the water heater manufacturers wiring diagram for details of the water heater and those of the water heater manufacturer Intelli Vent Wiring Diagram Typical Installation Consult Appliance Manufacturer s Instructions For Details INTELLI VENT CONTROL BOTTOM VIEW _ Li Bas FLA
4. or system mixing valve can be obtained from your local plumber Checking the temperature setpoint may be performed at any time by the procedure described on step 1 of Temperature Regulation on page 4 No other action is needed for check ing temperature setpoint SHUTTING OFF THE APPLIANCE Vacation Shutdown A WARNING Never allow small children to use a hot water tap or to draw their own bath water Never leave a child or impaired person unattended in a bathtub or shower Scald burns can result 1 Wake up the temperature indicators by holding down both the COOLER and HOTTER temperature adjustment but tons at the same time for one second see Figure 2 One or two of the temperature indicators will light up Make a note as to which indicators are illuminated so that you can reset the control to the same setting when you return from vacation INSTALLATION 2 Press and release the COOLER button as many times as needed until the green leftmost indicator is only lit This temperature setting is approximately 70 F Leave the gas turned on 3 When returning from vacation reset the temperature to that you noted in step 1 Complete Shutdown 1 Turn off the electrical disconnect on the appliance or remove the plug from the receptacle whichever applies Don t worry the Intelli Vent control will remember your correct temperature setting 2 Turn off the gas supply to the water heater The water heater
5. v Oo 000 ignition retries or recycle has been reached and the system is in lockout v A B C 4 a 00000960 mained open longer than 5 2 The pressure switch tubing is not connected cor seconds after the combus rectly tion blower was energized 3 Obstructions or restrictions in the water heater air intake or exhaust flue yw A B C The self diagnostic test has 1 Check that all wiring is correct and secure 0000090 5 detected an error in the Hot 2 Disconnect the ignitor and measure the ignitor re Surface Ignitor circuit sistance with an accurate ohmmeter between pins 1 and 2 Resistance should be between 11 5 and Ih 18 8 ohms If the reading is incorrect replace the Hot Surface Ignitor 3 If the above checks are good replace the INTELLI 1 2 3 4 VENT control v j The maximum number of 1 Check if the gas supply is off or too low to operate 2 Check that the flame sense rod to see that it is located properly and free from contamination Reposition the flame sense rod or lightly clean with an abrasive cloth 3 The Hot Surface Ignitor may not be positioned cor rectly Reposition as necessary 4 The Hot Surface Ignitor and Flame Sense Rod wired correctly and in good working condition Repair as required 5 Low voltage to the water heater Check and repair TROUBLESHOOTING The self diagnostic test Cycle power to the water heater off for 10 seconds A B C 4
6. 37E73A 918 921 922 or 927 INTELLI VENT Water Heater Thermostat Control Installation Instructions For Natural Gas Only Operator Save these instructions for future use FAILURETO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND OR PROPERTY DAMAGE White y Rodgers The 37E73A 9XX INTELLI IGNITION control is a combination gas valve ignition control and thermostat for use on Power Vented water heaters The microcomputer in the control supervises the ignition sequence and timings for the water heater and provides diagnostic codes in case of system malfunction The control provides direct burner ignition using the White Rodgers Silicon Nitride ignitor The control uses the INTELLI IGNITIONT technology to greatly extend the ignitor s life Adjustable Regulator Controls The gas regulator on this control requires no field service The regulator is factory adjustable for the proper burner gas pressure A WARNING WHATTO DO IFYOU SMELL GAS e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s Instructions e If you cannot reach your gas supplier call the fire department A WARNING Do not use this Natural Gas control on LP Gas water heater Improper operation could occur resulting in pe
7. MMABLE VAPOR SENSOR IF EQUIPPED IGNITOR AND FLAME PROBE ASSEMBLY GREEN E TO POWER SUPPLY DISCONNECT AND OVERLOAD PROTECTION HIGH AIR COMBUSTION LIMIT PRESSURE BLOWER SWITCH SWITCH APPLY POWERTO APPLIANCE NO IS FIELD WIRING DISPLAY ERROR CODE CORRECT Tor 2 YES Intelli Vent Sequence of Operation SEQUENCE OF OPERATIONS NO IS WAIT FOR PRESSURE SWITCH TO OPEN DISPLAY ERROR NUMBER 3 PROVEN OPEN WITHIN 5 SECONDS COMBUSTION BLOWER ON 5 WAIT FOR PRESSURE SWITCH TO CLOSE DISPLAY ERROR WITHIN 5 NUMBER 4 ONE HOUR AUTO LOCKOUT RESET DELAY REQUEST NO FOR HEAT PRESENT YES IS NO WAIT FOR PRESSURE PRESSURE SWITCH SWITCH TO OPEN PRESSURE SWITCH PROVEN OPEN WITHIN DISPLAY ERROR 5 SECONDS NUMBER 3 YES COMBUSTION BLOWER ON 5 WAIT FOR PRESSURE PRESSURE SWITCH NO SWITCH TO CLOSE PRESSURE SWITCH PROVEN CLOSED DISPLAY ERROR PROVEN CLOSED wine 5 NUMBER 4 SECONDS SECONDS YES PREPURGE Is NO TURN OFF INDUCER IGNITOR DISPLAY ERROR CODE OKAY NUMBER 5 YES IGNITOR ON FOR WARM UP TIME MAIN VALVE OPENS BURNER LIGHTS NO Less AND IS SENSED DURINGTRIAL MAIN VALVE CLOSES THAN 3 TRIES FOR OR IGNITION IGNITION YES NO IGNITOR TURNS OFF YES MAIN VALVE CLOSES Is REQUEST FOR HEAT SATISFIED YES MAIN VALVE OFF COMBUSTION BLOWER OFF AFTER POS
8. OO 110 000000 115 00060000 120 5 minutes 00060000 125 000000 130 30 seconds 00006000 135 000000 140 5 seconds 0000806 145 00000 150 1 5 seconds O a ds 160 Under 1 second 3 When you have completed setting the control wait 30 seconds to see that the temperature indicators go off and the control enters Sleep mode ALL OF THE TEMPERA TURE INDICATORS WILL BE OFF DURING NORMAL OPERATION If any time you see the indicators on there may be a system error and you should consult the Trou bleshooting section of this document or contact a trained service professional If you use hot water frequently and in short spurts water tem perature can occasionally exceed the temperature setting by up to 30 F because of the dynamics of the appliance Keep this in mind when you are selecting a temperature higher than the factory default setting Be sure to protect babies and the infirm or others with im paired mobility who cannot get out of the hot water quickly A WARNING Scald burns occur in under one second with 160 F which this thermostat will deliver if the water temperature is set at VERY HOT Lower settings of the temperature will reduce the risk of scald and will reduce your fuel bill They are the people most commonly hurt in scald injuries and in need of lower temperature and other protection like supervision point of use temperature control equipment or a system mixing valve A point of use valve
9. T PURGE DELAY COMBUSTION BLOWER OFF INTERPURGE YES YES TURN OFF INDUCER AFTER POST PURGE DISPLAY ERROR 6 Please Note The control continually monitors internal circuits and external sensors Error codes noted above and those for self diagnostic faults can be found on pages 8 and 9 TROUBLESHOOTING The troubleshooting charts cover the error codes that the Intelli Vent control can recognize the potential cause and those actions that may help repair the problem The water heater manufacturer s troubleshooting procedure should be consulted before attempting to repair the appliance The wa ter heater manufacturer s instructions take priority over the instructions here If for any reason you question your ability or feel any doubt about your ability to perform any of the troubleshooting pro cedures or repairs recommended STOP Contact a trained and qualified service professional to repair the water heater To troubleshoot the system using the error code indicators 1 Check that the system is currently active and calling for a request for heat You can initiate a call for heat by either drawing hot water from a nearby faucet or raising the tem perature setting see section Temperature Regulation If you have noted an error code from a previous heating cycle this step is not necessary and you may proceed with the next step Refer to the troubleshooting c
10. ation If any combi nation of indicators remain illuminated either refer to the troubleshooting section of this manual or contact a quali fied service person 6 The water heater is now ready for operation and will begin to heat the water to the factory default setting of approximately 70 F If an alternate temperature setting is required please refer to the following section Temperature Regulation TEMPERATURE REGULATION After the gas and electrical connections are made and the water heater tank is full of water the control will now start to heat the water to the factory default setting of approximately 70 F If a higher setting is desired start with the setting at the triangle W This is approximately the 120 F setting and the safest and most economical setting for the water heater To change the temperature setting for either cooler or warmer water the following steps are necessary 1 Wake up the temperature indicators by pressing the COOLER and HOTTER temperature adjustment buttons at the same time and releasing after one second see Figure 4 One or two of the temperature indicators will light up These indicators will only remain on for 30 seconds if no further buttons are pressed After 30 seconds the control will go back to Sleep mode and both buttons will again have to be pressed to see the water temperature setting 2 If this is the first time that the control has been used the leftmost green i
11. er outlet pressure is required follow these steps If a valve has been factory adjusted for the 2 5 to 5 inches W C range it cannot be field adjusted outside that range 1 Turn off all electrical power to the system 2 These models have 1 8 NPT threaded taps The outlet pressure tap plug will need to be removed and a separate hose fitting installed 3 Attached a hose and manometer to the separate hose fitting which has been installed in place of the 1 8 NPT threaded tap 4 Turn on system power and energize valve 5 Remove regulator cover screw and turn regulator adjust screw clockwise to increase pressure or counterclockwise to decrease pressure see INSTALLATION fig 3 Always adjust regulator to provide the correct pressure according to the original equipment manufacturer s specifications listed on the appliance rating plate Replace regulator cover screw 6 Turn off all electrical power system to the system 7 Remove manometer hose from outlet pressure tap 8 Remove hose fitting and re install the 1 8 NPT pressure tap plug Tighten to 60 in Ib max 9 Turn on electrical power to the system 10 Turn on system power and energize valve 11 Using a leak detection solution or soap suds check for leaks at pressure boss screw or pressure tap plug Bubbles forming indicate a leak SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY Outlet Pressure Regulator Adjust Tower 1 8 Threaded Outlet Pressure Tap
12. harts on below to find the error code that is displayed Check and repair those items recommended Once the repair is complete again initiate a call for heat and observe that the ignition sequence complies with that shown on page 7 After the water heater repair is complete return the water heater temperature setting to the original temperature If for any reason you cannot remember the original setting return the setting to the 120 F setpoint See the section Temperature Regulation for assistance in setting the wa ter temperature setting Error Indication Check Repair or Replace 00 OR O gt O An open earth ground cir cuit to the ignition system The self diagnostic test detected a wiring error or a high resistance to earth ground 1 Check that the earth ground conductor is properly connected at the fuse box or breaker panel and the water heater 2 Check that the grounding conductors on the water heater are properly connected and secure 1 Check for proper connection of the line neutral and line hot wires 2 Check that the appliance is securely connected to earth ground O Ov 000 The pressure switch re mained closed longer that 5 seconds after the call for heat began 1 The pressure switch wiring is incorrect 2 The pressure switch is defective and must be replaced The pressure switch re 1 The pressure switch wiring is incorrect gt Q
13. he control The connectors have latches which must be depressed DO NOT FORCE THE CONNECTORS DAMAGE TO THE WIRING MAY RESULT 4 Shut off the water at the cold water inlet 5 Connect a hose to the water heater drain cock Drain the water to a nearby drain Open a hot water faucet for faster draining 6 Disconnect the gas line at the union Figure 1 Remove the piping from the old control 7 Remove the control by turning it counterclockwise MN INSTALLING THE NEW CONTROL All piping must comply with local and state ordinances or with the National Fuel Gas Code ANSI Z223 1 NFPA 54 whichever applies Automatic High Temperature Cutoff Single Use Type 185 F 82 C Prepurge Time 5 Seconds Ignitor Warm up Time 20 Seconds Trial for Ignition Period 4 Seconds Inter purge Time 5 Seconds Post purge Time 5 Seconds Ignition Retries 2 Retries 3 Trials before lockout Ignition Recycles 2 Recycles 3 Losses of flame before lockout BODY CONFIGURATION Right angle with a 1 2 NPT inlet and a 1 2 inverted flare outlet MOUNTING Limited Horizontal Vertical Dirt or contamination in the gas line can block the control from operating creating a risk of explosion injury or death To protect the control from dirt and contamination a drip leg or sediment trap see Figure 1 must be installed in the piping leading to the control 1 Apply pipe compound to the male threads of the pipe that goes into the control leaving
14. ndicator will be illuminated indicating the water temperature setting of approximately 70 F See Table 1 for an explanation of what each of the temperature indi cators mean a To decrease the temperature press and release the COOLER button once The temperature indicators will now display the new temperature setting Press and release the COOLER button until you have reached the desired setting HOLDING DOWN THE BUTTON WILL NOT CONTINUE TO LOWER THE SETTING The Button must be pressed and released for each tem perature change desired TEMPERATURE INDICATORS TEMPERATURE ADJUSTMENT BUTTONS Figure 4 Temperature Indicators and Adjustment b To increase the temperature press and release the HOTTER button once The temperature indicators will now display the new temperature setting Press and release the HOTTER button until you have reached the desired setting HOLDING DOWN THE BUTTON WILL NOT CONTINUE TO RAISE THE SETTING The Button must be pressed and released for each temperature change desired To avoid scald injury set the control to the lowest setting which will deliver your needed hot water Refer to Table 1 to determine the approximate temperature setting and the ap proximate time for scald injury at that temperature Table 1 Temperature Settings Display Approximate Approximate Temperature Time to Cause vVABC 10 F Injury O O O O OJ 70 Vacation N A oO OO0
15. rsonal injury and or death due to Carbon Monoxide CO poisoning fire or explosion Check for proper gas type as listed on the rating plate affixed to the water heater CONTENTS Description Precautions Specifications Installation Operation Troubleshooting 4 EMERSON Pit ata TarlnaAlanioc Climate Technologies DESCRIPTION PRECAUTIONS FIRE SHOCK AND EXPLOSION HAZARDS Shut off main gas to appliance for service or until installation is complete Disconnect electric power before servicing Do not exceed the specified voltage Replace existing control with recommended model Protect the control from direct contact with water dripping spraying rain etc If the control has been in direct contact with water replace the control Label all wires before disconnection when servic ing controls Wiring errors can cause improper and dangerous operation Route and secure wiring away from flame Ensure proper earth grounding of appliance Ensure proper connection of line neutral and line hot wires Do not use tools to operate this control Do not take control apart there are no serviceable parts inside Do not use control if it has been flooded Never stand on the control or use as a step A WARNING PART NO 37 7110A www white rodgers com www emersonclimate com 0950 SPECIFICATION ELECTRICAL RATINGS Input and Frequency 120 VAC 60 Hz Output Ratings Ignitor Load 2 Amps maximum Inducer Draft Mo
16. that the water open or shorted circuits 000000 temperature sensor is ei If no wiring problems are found the INTELLI ther open or short circuited VENTTM control must be replaced by a qualified service person v A B c The self diagnostic test Check that all wiring is correct and that there are no 14 found a problem with the open or shorted circuits 000000 Flammable Vapor Sensor If no wiring problems are found the flammable Vapor Sensor must be replaced ie The control detected the If you smell gas STOP Follow the instructions v 000 O Oo o presence of flammable vapors near the appliance and entered lockout What to do if you smell gas on page 1 of this instruction sheet Otherwise call a qualified service person for replacement of the control NOTES NOTES White y White Rodgers is a division Rodgers amp of Emerson Electric Co The Emerson logo is a EM ER ON Climate Te nologies trademark and service mark www white rodgers com of Emerson Electric Co www emersonclimate com Clin
17. the first two or three threads clean 2 Install control in the tank Turn clockwise Ta Use a short piece of pipe to help in turning Align the control so that the burner tube may be connected 3 Make the main burner connection Do not use pipe joint compound or Teflon tape 4 Connect the gas line Use new black iron pipe that has been properly reamed If old pipe is used be sure it is clean and free from rust and scale Use pipe joint compound on male threads only Use pipe joint compound approved for natural and LP gas service Do not use TEFLON tape Do not apply compound to the first two threads 5 DO NOT use joint compound or tape on the union connection 6 Make the electrical connections to the control There are two plastic connectors that plug into the bottom of the control The connectors are keyed so that they can only be inserted one way Make sure that the connectors are properly aligned before attempting to insert DO NOT FORCE THE CONNECTORS DAMAGE TO THE CONTROL WILL RESULT 7 To fill the water heater with water a Close the water heater drain valve by turning the handle to the right clockwise The drain valve is on the lower front of the water heater The cold water supply valve must be left open when the water heater is in use b Open the cold water supply valve to the water heater c To ensure complete filling of the tank let air exit by opening the nearest hot water faucet Allow water to r
18. tor 3 Amps Full Load 4 Amps Locked Rotor Current 0 2 Amps 120 VAC Range of Regulation Btu Hr Minimum 30 000 Maximum 150 000 Pressure Regulator Setting Factory set to 3 5 or 4 0 W C Adjustable 2 5 to 5 0 W C 1 0 Pressure Drop Capacity 100 000 Btu Hr Based on 1000 Btu ft 0 64 specify gravity natural gas Maximum Inlet Pressure 1 2 PSI maximum Ambient Temperature Rating 32 F to 160 F 0 C to 70 C INSTALLATION 1 This control must be installed or serviced only by a professional 2 For your safety this control is supplied with tamper resistant screws Do not attempt to repair or adjust the control If you experience problems replace the control immediately Continuing to use a damaged control could result in fire and or explosion 3 An odorant has been added to the gas to help you detect it Before lighting search for the odor of gas by sniffing at floor level around the water heater 4 In some situations the gas may lose its odor To detect unodorized gas you must have a gas detector which can be purchased from your gas company If you do not have a detector and have the slightest suspicion that gas may be present get out of the house and call the gas company DO NOT RELY TOTALLY ON YOUR NOSE REMOVING THE OLD CONTROL 1 Shut off the gas to the water heater 2 Turn off electrical power to the water heater 3 Remove the two plastic wire connectors that plug into the bottom of t
19. un until a constant flow is obtained This will let air out of the water heater and the piping Never use this water heater unless it is completely filled with water To prevent damage to the tank the tank must be filled with water Water must flow from the hot water faucet before turning ON gas to the water heater GAS SUPPLY PIPE INTELLI VENTTM CONTROL DRIPLEG 7 SEDIMET TRAP WE 3 MINIMUM MANDATORY PIPE CAP Figure 1 Typical gas connection d Check all new water piping for leaks Repair as needed 8 Open the gas shutoff valve 9 BEFORE TURNING ON THE APPLIANCE CHECKTHE GAS LINES FOR LEAKS a Use a soapy water solution DO NOT test for gas leaks using a match or open flame b Brush the soapy water solution on all gas pipes joints and fittings Use care that excess solution does not enter the control s plastic housing c Check for bubbling soap This means you have a leak Turn OFF the gas and make the necessary repairs d Turn on the gas and recheck for leaks Repeat this process until you are sure the system is gas tight If repeated work on a part does not stop the leak the part must be replaced e Rinse off the soapy solution and wipe all the plumbing parts dry PRESSURE REGULATOR ADJUSTMENT These controls are shipped from the factory with the regulator set as specified on the control label Consult the appliance rating plate to ensure burner manifold pressure is as specified If anoth
Download Pdf Manuals
Related Search