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HPWH Service Handbook (321549

1. 409184 000 u u u 409185 000 26 30 27 Element Door iude e tp eite edd evga glk 409196 000 28 Filter Dry6r cea epe eer ieee cman nga Call 1 800 433 2545 29 Thermal Expansion Valve Call 1 800 433 2545 30 Pressure Switch high U U U emm nennen Call 1 800 433 2545 31 Pressure Call 1 800 433 2545 32 Evaporator e ari ee edet ate iui ente Call 1 800 433 2545 33 Compressor 850 Watt Rotary r Call 1 800 433 2545 47 2311625 77747 WATER HEATERS P O Box 1597 500 Princeton Road Johnson City TN 37605 Technical Support 800 456 9805 Parts 800 433 2545 Fax 800 644 9306 www americanwaterheater com Copyright 2011 All Rights Reserved
2. 9007478005 7 Fan Assembly 60 9007486005 8 Upper Heating Element 4 5 kW eene eene nennen 9007479015 9 Lower Heating Element 2 0 kW uu u u 9003946115 10 Energy Cut Off Switch ECO enne 9007480015 11 J tube Hot Water Outlet Stainless Steel a enn 9007481015 12 Anode Powered 3mm for 80 gallon models i a 9007564005 13 Anode Powered 2mm for 60 gallon models a 9007324005 14 Ait Filter g a a aide me 9007482005 15 Compressor Wiring Harness U nennen nennen uu nnns 409171 000 16 Fuses 2 Input power to control board Amp 250V slow blow 20mm X 5mm 9007485015 T 9000728015 18 Drain Valve Brass 2 Incl eee EE e per A re gei B Q am a RE 9001870015 19 Nipple Dielectric PEX Lined 3 inch a nnn 9005883115 20 Element Access Cover upper nennen enne enne nne 409230 000 21 Element Access Cover lower u nennen enne 409231 000 22 Personnel Protector 066 408454 000 23 Personnel Protector element terminals I a 409195 000 24 Air Inlet Side Panel eene
3. D Proceed to Completing the Test 23 Figure 13 Element Completing the Test Replace the element s if necessary p 24 Reconnect the terminal wires Reinstall the thermostat cover s put the insulation back in place then reinstall the cover panel s Make sure that the tank is full of water before reconnecting power A Open a hot water faucet B Once water flows smoothly from the hot water side of the faucet all air has been purged from the tank and it is safe to energize the elements C Reconnect power to the water heater Heating Element Replacement Replacement heating elements must be of the same style and Voltage wattage rating as the ones originally in the water heater This information can be found on the A WA RN G flange or terminal block of the element or on the water heater data plate Before removing any access panels or servicing the water IMPORTANT Before replacing any element confirm heater make sure the electrical supply to the water heater is that you have the correct replacement element turned wattage This water heater has a folded 4500 watt upper element and a folded 2000 watt lower element e Failure to do this could result in DO NOT replace the element s with a wattage style death serious bodily injury or property damage or shape different than the elements specified for the upper and or lower element 1 Turn off
4. A WARNING Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage insulation away from the element Do not damage the insulation 4 Remove the thermostat cover s 5 Disconnect the wires from the element terminals Testing for a Burned Out Element 1 Complete Preparing for the Test before you proceed 2 Measure the element s resistance by placing a probe on each terminal See graphic at right 3 Compare your result with the following A lf the resistance is between 10 and 25 Ohms the element is good Proceed to Completing the Test B Ifthe meter shows no continuity the element should be replaced p 24 Proceed to Completing the Test C Ifthe meter measures more than 25 Ohms 1 proceed to Testing for a Grounded Element 2 3 IIB Testing for a Grounded Element 1 Complete Preparing for the Test before you proceed 4 2 Check for resistance as follows A Place a probe on one of the element terminals and the other probe on the element flange or tank shell Ensure a good ground connection B Repeat the test for the other element terminal C If both tests show infinite resistance the element is not grounded If either test shows less than infinite resistance the element is defective and should be replaced p 24
5. 28 Powered Anode Check Flow Chart Fault Check Reconnect connection at terminal to anode powered anode ae Reconnect connection on terminal to control board png CN203 Check Reconnect No call tech services connection at ground to terminal in ground bottom of control board box Good Restore Disconnect wire from powered Clean threads on anode powered anode and tank threads apply Disconnect teflon tape to anode CN203 re install and re connect and measure resistance between Check voltage Yes Check that upper element is folded Replace element No with folded type Replace anode wire Remove anode and check resistance from threaded portion Check Place unit in resistance standby mode from anode center and turn power tab to tank off at breaker 21MQ fuse panel Bad Replace anode Call tech services replacing the control board does not resolve the issue contact technical support 29 Fan Check Flow Chart Fan doesn t operate when compressor is on no fault on UIM Set to efficiency mode increase set point15 F so compressor comes on Check voltage at control board connector CN207 between pins 1 and 3 240V control board Turn off power at breaker fuse panel CN207 Measure motor resistance of fan wire harness
6. 8 After piping has been properly connected to the water heater open the nearest hot water faucet Then open the cold water shut off valve and allow the tank to completely fill with water To purge the lines of any excess air and sediment keep the hot water faucet open for three 3 minutes after a constant flow of water is obtained Close the faucet and check all connections for leaks Massachusetts Install a vacuum relief in cold water line per section 19 MGL 142 A Vacuum Relief Valve Cold Water Inlet Valve Pressure Reducing Valve PRV should be installed where the water supply enters the residence e nan Installation Instructions Set to 120 F SEs Tempered Water to Fixtures Discharge Pipe en Condensate Drain Lines Do Not Cap or Plug _ gt Cold Water Outlet In a closed system use a thermal expansion tank See Closed System Thermal Expansion section Metal Drain Pan 2 1 2 Depth Maximum and 2 Inches wider than the water heater Drain Line 3 4 ID Minimum 6 Maximum Air Gap If an adequate drain is not available for the condensate drain lines then a condensate pump should be used DO NOT discharge the condensate drain lines into the metal drain pan Drain Temperature and Pressure Relief Valve Temperature pressure relief valve must comply with ANSI Z21 22 CSA 4 4 and ASME code Properl
7. Do not shut off power to the unit for an extended period of time If power must be turned off drain the tank completely to minimize corrosion Water Piping System Piping fittings and valves should be installed according to the installation drawing Figure 2 If the indoor installation area is subject to freezing temperatures the water piping must be properly insulated Water supply pressure should be 50 60 PSIG 35 MPa and not exceed the maximum 80 PSIG 55 MPa If the supply line pressure exceeds 80 PSIG 55 MPa a pressure reducing valve PRV with a bypass should be installed in the cold water supply line This should be placed on the supply to the entire house in order to maintain equal hot and cold water pressures IMPORTANT Heat must not be applied to the water fittings on the heater as they may contain nonmetallic parts If solder connections are used solder the pipe to the adapter before attaching the adapter to the hot and cold water fittings Always use a good grade of joint compound and be certain that all fittings are tight IMPORTANT DO NOT over apply joint compound Piping Installation 1 Install the water piping and fittings as shown Figure 2 Connect the cold water supply 3 4 NPT to the fitting marked Cold Connect the hot water supply 3 4 NPT to the fitting marked Hot 2 The installation of unions in both the hot and cold water supply lines are recommended for ease o
8. ECO tripped as the control board may be faulty Check the relays on the control board to determine if the contacts might be stuck closed check the three relays listed in Table 3 by checking pin to pin resistances as noted Resistance should be greater than 1 mega Ohm no continuity between the pins as listed in the table If the resistance between any of the pin combinations listed is less than 1 mega Ohm replace the control board RY 203 Upper Element COM to NO Top of Relay RY 205 Lower Element CN206 pin 1 to 4 RY 207 CN202 pin 1102 25 Checking the Run Capacitor If the compressor is not operating or is not operating correctly the run capacitor may be the cause and should be checked Capacitor PL L Terminals A bad capacitor will typically be either shorted or open Visually inspect the body of the capacitor look for any sign of the housing bulging splitting or leaking fluid Replace the capacitor if there is any sign of physical damage Use a capacitance meter to measure the capacitance of the capacitor If it measures 25uF 5 it is good If the value is outside this tolerance the capacitor is bad and should be replaced If a capacitance meter is not available use an Ohm meter to check the condition of the capacitor Place one meter lead on each of the capacitor terminals If the resistance value is increasing or decreasing this indicates it is charging or discharging and that the capacitor i
9. F 33 Pressure Temperature Chart for Refrigerant R 134a P um 2n ae a te ae m ao e os a aep s s s 7 Pets 5 gt fe fo 2 e 6 2 2 az os sa 0 s se m gt rs 6 6 6 m tese eo oo p os wo ws m ws vm vs me ms v _ 76 as 6 o 105 wr Fes vss ves we vs 100 vos 200 205 zo p ze me me ze me we we aas 5o 35 34 Cleaning the Evaporator Proper maintenance and cleaning of the supplied washable air filter should prevent the evaporator from getting dirty However should the evaporator become dirty it must be cleaned to maintain performance of the heat pump Care should be taken during cleaning not to damage the evaporator fins If the fins become bent use a fin straightening tool 12 fins per inch to re align the fins The most effective way to clean the evaporator is to use a commercially available spray cleaner intended for cleaning air conditioner evaporators Select a product that is compatible with plastics such as ABS and high impact polystyrene and is ano rinse product intended for indoor us
10. The User Interface Module on the front of the heat pump water heater has a multi function display that gives information about the status and condition of the operation of the water heater In power saving mode the display will be off momentarily touching any of the buttons above or below the display area will wake the display and cause it to light up The User Display is the default screen viewable during normal operation A second display mode is available Maintenance Display which provides more detail about how the water heater is operating and stores and displays more specific fault messages Accessing the Maintenance Display 1 Touch and hold the Up and Down arrows at the same time for three 3 seconds The display will change to the Maintenance Display mode A total of ten 10 screens are available in this mode see Table 2 By using the up arrow to scroll each screen is available for viewing The first six 6 screens display system temperatures and the final four 4 show the fault code history The down arrow can be used to access previous screens Interpreting the fault code history Fault code E01 is the newest code detected If there is a fault shown on the User Display E01 is the active fault Faults E02 through E04 are faults that have been detected in the past and may or may not be relevant If one of these faults is the same as E01 it is an indication that the fault is repeating If there are multiple ope
11. check LED201 on the control board If lit assume control board is good Troubleshoot the UIM and ribbon cable fnotlit troubleshoot control board Troubleshoot UIM Turn off power at the circuit breaker fuse box Check for a loose connection of the ribbon cable at CN211 or CN215 on the control board Check the cable connection on the UIM PCB Troubleshoot control board Check the fuses on the control board 1 If good replace the control board If replacing control board doesn t resolve issue call technical support 2 If bad replace fuses and look for shorts to ground 44 Draining and Filling the Water Heater Draining and Filling the Water Heater ADANGER Burn hazard Hotwater discharge Keep hands clear of drain valve discharge The water heater should be drained if being shut down during freezing temperatures Also periodic draining and cleaning of sediment from the tank may be necessary A WARNING Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage 1 Place the water heater in Standby Mode by pressing the power button on the user interface module 2 Turn off the power to the water heater at the breaker or disconnect switch serving the water heater 3 Open a nearby hot water faucet
12. connector Check filter and evaporator for dirt and dust build Motor thermal switch may be open allow to cool Bad Repeat resistance check Replace fan Clean evaporator and filter Replace control board CN207 No Call tech services If replacing the control board does not resolve the issue contact technical support 30 Fan Check Flow Chart Fan connect fault on UIM Check connection at CN207 on CN207 Check resistance on fan cable connector pin 1to3 Good 49 610 _ Replace control board Thermal switch may be open allow to cool Check air filter clean if needed resistance of cold Call tech services 31 Temperature Sensors Overview The temperature sensors used in this water heater are negative temperature co efficient NTC thermisitors With this type sensor as temperature increases the resistance across the thermisitor decreases or as temperature decreases resistance will increase The control board monitors the resistance of each sensor and converts each to a corresponding temperature There are five 5 such sensors installed on the heat pump water heater to monitor ambient evaporator coil upper tank lower tank and compressor discharge temperatures Each is critical to the operation of the unit If there is a connection issue with any sensor there should be a connection fault displayed on the U
13. determined that the element is not fully submersed in water an error will be displayed on the user interface LOW WATER LEVEL ALARM The water heater will not operate while this fault is active and it must be cleared before the water heater will operate In order to clear the error shut off power to the water heater and purge all air from the water heater tank This is done by opening all hot water taps in the building Run the water until there is no air coming out with the water Shut off all hot water taps Apply power to the water heater After four 4 minutes dry fire detection should be complete the error should be cleared and the water heater should operate normally If the LOW WATER LEVEL ALARM repeats purge air from tank again by following the method outlined above Powered Anode Operation Checking the Powered Anode for Proper Operation When dissimilar metals are in contact with water a galvanic cell will likely result and corrosion of the metal components will occur If left unchecked corrosion will weaken the wall of a water heater tank which will eventually leak Passive anodes are typically used to counteract this corrosion and extend tank life Passive anodes erode over time and become less effective until they stop working all together another type of protective device is a powered anode A powered anode is an active device that counteracts galvanic corrosion in the water heater tank Unlike a standard deplet
14. heat water if demand Icon LCD Control exceeds a predetermined level so that the Panel Lock Icon set point temperature can be recovered more quickly e p Temperature p increase Down Decrease Button So i AU f Electric Mode The water heater functions as UN inani ase conventional electric unit relying totally on Temperature Display LCD Display Panel the elements to heat the water in the tank This Button Lock Button mode may be useful in winter to eliminate the Power Button On Green output of cold air from the unit Standby Red 13 Control Board Overview Figure 5 SOV d muc Heat Pump Water Heater Control Board Overview The Control Board on the Heat Pump Water Heater monitors the complete heating system and reports any errors through the User Interface Module UIM Based on the inputs from the sensors and or the manual inputs from the UIM the Control Board determines which heating mode the unit should be in to reach the user set point Above the Control Board is broken down into four 4 sections The specifics of each section are explained in greater detail in the following pages 14 Section A of Control Board Section A 2 9 SN S M uu 2 CN206_ E Ls ES CN 201 Line Power Pin 1 Control board power wire L1 240VAC Pin 2 Control board power wire L2 240VAC Pin 3 Not used Pin 4 Cont
15. is still present Call tech services Heat Pump Low Pressure Fault Lower pressure switch is open Low suction pressure Use a service gage set to check system pressures high and low sides The low side pressure switch opens if suction pressure drops below 7 3 psi and will reset close when pressure exceeds 21 8 psi if suction pressure is less 21 8 psi the low pressure switch is open preventing the compressor from running be caused by poor air flow across the evaporator make sure the evaporator and air filter are free of dust and dirt build up see Cleaning the Air Filter p 11 and Cleaning the Evaporator p 35 Can be caused by low refrigerant charge or a blockage in the refrigerant system Low side pressure checks good Disconnect the wires from the low pressure switch and check Heat Pump High Pressure Fault High pressure switch is open High discharge pressure Use a service gage set to check system pressures high and low sides high pressure switch opens at 338 psi and resets when pressure drops below 275 psi if it is 275 psi or higher then the pressure switch is open preventing the compressor from running be caused by poor air flow across the evaporator make sure the evaporator and air filter are free of dust and dirt build up see Cleaning the Air Filter p 11 and Cleaning the Evaporator p 35 Can be caused by blockage in the refrigerant sy
16. 6 Coil temperature sensor 17 Section C of Control Board con t CN 211 215 UIM Communication Cable Pin1 5V Pin2 12V Pin 3 Signal A Pin 4 Signal B e Pin 5 Ground Note Both CN211 and CN215 are identical and either can be used for the UIM communication CN 208 Overload Detection Pin 1 High pressure switch e Pin 2 High pressure switch Pin 3 Low pressure switch Pin 4 Low pressure switch Pin 5 Not used Pin 6 Not used Pin 7 Not used Pin 8 Not used Pin 9 Condensate pump signal overflow optional Pin 10 Condensate pump signal overflow optional Note Pin 9 and 10 are connected by a jumper wire This wire should be cut and wired in series to the overflow switch of the field supplied condensation pump optional SW 201 Dip Switch SW 1 Not used SW 2 Not used SW 3 Not used SW 4 Not used Led 201 Power Indicator LED 201 when illuminated indicate that 5 and 12 Volts DC are present for the UIM Section D 4111 P sec EIL LED 202 203 Powered Anode Indicators A2 R244 LED 202 1 flash second indicates R there is power to the anode circuit 5 LED 203 J 2 Two 2 flashes second approx indicates proper operation Four 4 flashes second approx indicates a fault 18 Wiring Diagram for Models With Relay HOLIMS gt COIL TEMP SENSOR HEAT PUMP
17. 8 Common Service Fault Code Troubleshooting Gulde tee dedere deer rete eg ades dnce teg eene dT eo k AQ 39 44 45 Condensate PUMP sci uiii tre et ste Oe pte timete leis aqhaqa assasi aaa 46 47 Service Handbook Introduction Your safety and the safety of others is extremely important in the servicing of this water heater Many safety related messages and instructions have been provided in this handbook and on your water heater to warn you and others of potential hazards Read understand and obey all safety messages and instructions that appear throughout this handbook and in the Installation Instructions and Use amp Care Guide that shipped with the water heater It is very important that the meaning of each safety message is understood by you and others who service this water heater The information contained in this handbook is designed to answer commonly faced situations encountered in the operation of the residential electric heat pump product line and is not meant to be all inclusive If you are experiencing a problem not covered in this handbook please contact the Technical Information Center listed on the back cover of this handbook for further assistance Additional information is also available on the web site listed on the back cover of this handbook This handbook is intended for use by qualified service technicians and reference should be made to the
18. Check wires for damage Discharge temperature sensor is short or open Unplug ribbon cable from CN212 check resistance between pins and 4 of the ribbon cable 40 Fault Code Troubleshooting Guide connector Refer to chart 2 p 33 for expected resistance value If the measured resistance is 2000 or 00 the thermisitor is faulty Replace thermisitor assembly Control board faulty e Replace control board If replacing the control board doesn t resolve the issue contact technical support Coil Temperature Sensor Short or Open or Ad Error Coil temperature sensor circuit is not functioning Loose connection or damaged wire Turn off power at the circuit breaker fuse box Check that connector CN212 on control board is seated Check wires for damage Discharge temperature sensor is shorted or open Unplug ribbon cable from CN212 check resistance between pins 5 and 6 of the ribbon cable connector refer to chart 1 p 33 for expected resistance value If the measured resistance is 400 or 00 the thermisitor is faulty Replace thermisitor assembly Control board faulty e Replace control board If replacing the control board doesn t resolve the issue contact technical support Low Water Level Alarm The tank is not full of water Tank is not completely filled with water Ensure that the tank is completely filled and cycle power off and back on to restart dry fire protection Fault
19. Faulty control board Replace the control board If replacing the control board doesn t resolve the issue contact technical support Main Control Board EEPROM Fault Main board failure Faulty control board Replace the control board replacing the control board doesn t resolve the issue contact technical support Main Control Board State Fault Main board failure Faulty control board Replace the control board replacing the control board doesn t resolve the issue contact technical support Low Supply Voltage Fault Low input voltage Power supply voltage is too low Verify the unit is connected to 240 VAC Heat pump operating voltage range is 204 264 VAC The compressor will not operate below 204 VAC but the heating elements will If connected to 208 VAC buck boost tramsformer is required to boost to 240 VAC High Supply Voltage Fault High input voltage Power supply voltage is too high Verify the unit is connected to 240 VAC unit is intended for 240 VAC connection only If connected to higher voltage a buck boost transformer may be required to reduce voltage Heat pump operating voltage range is 204 264 VAC The compressor will not operate above 264 VAC but the heating elements will If connected to 208 VAC a buck boost transformer is required to boost to 240 VAC 42 Fault Code Troubleshooting Guide Low Supply Voltage Fault Very low input voltage Power s
20. Installation Instructions and Use amp Care Guide accompanying the product This handbook contains supplemental information to the Installation Instructions and Use amp Care Guide When servicing residential electric heat pump water heaters it is essential that you return the unit to a safe condition before you leave the site All original components must be re installed and all safety measures must be implemented In addition the recommended water temperature setting is 120 F Certifications and Approvals Code Compliance All models meet or exceed federal minimum energy standards effective January 20 2004 according to latest editions of the National Appliance Energy Conservation Act NAECA They also comply with the latest editions of the B O C A National Codes C E C U B C S B C C C A B O and the H U D standards All models U L listed according to safety specifications outlined in Underwriters Laboratories Inc Standards for Safety UL 174 and UL 1995 Tools for servicing residential electric heat pump water heater models Container to measure flow rate Continuity checker or electrical multimeter with alligator leads Funnel for chlorination or scale removal treatments Hose to drain tank Figure 1 Needle nose pliers Pipe wrench Screw drivers flat tip and Phillips Nut Drivers 5 16 amp 9 32 Socket wrench 1 1 16 inch socket 6 point deep well for anode removal 1 1 2 inch sock
21. Interface Module UIM RED up If the power button does not turn green remove the protective film over the face of the UIM and re try the power button If the unit does not power up cycle power to the unit and re try using a thumb Low Water Level Alarm message The tank is not completely Purge air from the tank using the displayed on the UIM filled with water procedure outlined in the Dry Fire Element Protection section p 8 If the tank is properly filled the unit should operate normally Heat Pump Fault message There are 12 potential causes Refer to the Trouble Shooting section displayed on the UIM for this fault for corrective actions p 39 44 Efficiency mode selected but Ambient air or water Heat pump safety lock out occurs if elements come on instead of heat temperature outside the heat ambient air temperature is pump pump safe operating envelope below 45 F or above 109 F tank temperature is below 59 F Dry Fire Element Protection Dry Fire is a term used to describe a heating element that is on and not fully submerged in water This will result in permanent damage to the element The dry fire element protection algorithm is installed on this heat pump water heater and prevents damage to the heating elements in the event that power is applied to the water heater without sufficient water in the tank to cover the elements This routine takes approximately four 4 minutes If it is
22. Service Handbook FOR MODELS HPE10260H045DV 60 GAL HPE10280H045DV 80 GAL aa 7 017 INSTALLATION CONSIDERATIONS PREVENTIVE MAINTENANCE WATER HEATERS OPERATION amp SERVICE TROUBLESHOOTING ui pat SERVICE SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIAN PRINTED IN THE U S A 0511 321549 000 Table of Contents Fo EP 3 i003 tne tede tpe chelated 3 Hete 3 Terms Definitions and Formulas s e 4 5 Safety Installation Check Elster eniti ates Gee Pn ease ah ash cei ie wee tea 6 Potential ge tet ia Leu ham aol 7 Dry Fire Protection Powered Anode Operation U U U nenne ener nnns 8 Water Piping System Muirin pede ea edad cr i aie nee eee ad 9 10 7 T amp P Valve Thermal Expansion General Service Preventive Maintenancoe a 11 12 Operational Operating Your Heat PUMP trt eet buste unu e ete I tex uu aa ia breit teilte 13 14 0 Control Board Section A e eee nee van A nee eee p ee ce aaa 15 Control Board Section B Ht RERO RARI MIRROR E IRR a aaa Ya a hh aus 16 Contro
23. WATER HEATER WIRING DIAGRAM AA TANK LOWER TEMP SENSOR 88 TANK UPPERTEMP SENSOR REDI cc ANODE POWERED HDUMS 3unss3ud 39155399 1 YISN GREEN CN212 HP TEMP TEMP OVERFLOW SWITCH COMPRESSOR LOWER ELEMENT CN202 2 GREEN OV COMBINATION TANK JACKET GREEN eI TANK UPPER TEMP SENSOR HIGH LIMIT SWITCH BLACK TANK LOWER JUNCTION TEMP SENSOR UPPERELEMENT BOX 4 5 KW ae ANODE POWERED LOWER ELEMENT 240V 60Hz TANK 2KW NOTES 1 THEFUNCTIONOF CN211 AND CN215 IS THE SAME EITHER CN211 OR FIELD INSTALLED CN215 SHOULD BE CONNECTED TO COMPUTER BY SPECIAL CONNECTOR FACTORY INSTALLED 2 IF ANY OF THE ORIGINAL WIRE AS SUPPLIED MUST BE REPLACED RESERVED UIM CONNECTION USETHE SAME SIZE ONLY TYPE 105 C THERMOPLASTIC OR EQUIVALENT OPTIONAL OVERFLOW SWITCH 3 TANK LOWER ELEMENT MUST NOT EXCEED 2KW NORMALLY CLOSED Junction Box Overload i Circuit Protection Breaker Approved Connectors 11 12 To 240v 1 Phase Power supply Electrical Service ground Compressor control relays were used in early production models so the compressor s operating voltage did not have to travel through the tank s high limit switch Figure 10a 19 Wiring Diagram for Non Relay Models Junction Box Overload Protection Circuit Breaker Approved Connectors L1 12 To 240v Po Electrical S
24. alve when applicable installed per manufacturer s instructions see Water Piping System p 9 Condensate Drain Line Installation Must be located with access to an adequate drain or condensate pump e Condensate drain lines installed and piped to an adequate drain or condensate pump Electrical Connections The water heater requires nominal 240 VAC for proper operation Wiring size and connections comply with all applicable codes or in the absence of local or state codes follow NFPA 70 the National Electrical Code current edition Water heater and electrical supply are properly grounded Wiring enclosed in approved conduit if required by local codes Dedicated circuit with proper overload fuse or circuit breaker protection installed Post Installation Review To maintain optimal operation check remove and clean the air filter see Cleaning Replacing the Air Filter section p 11 Understand the importance of routine inspection maintenance of the condensate drain pan and lines see Inspection Cleaning of the Condensate Drain Pan amp Condensate Drain Lines p 46 This is to help prevent any possible drain line blockage resulting in the condensate drain pan overflowing IMPORTANT Water coming from the plastic shroud is an indicator that both condensation drain lines may be blocked Immediate action is required Understand how to use the User Interface Module to set the various modes a
25. ared to the surface area of the element i e High Watt Density Element will have the most wattage per square inch of element surface Safety Precautions Water temperature over 125 F A ADANGER 52 C can cause severe burns WARNING resulting in severe injury Explosion Hazard Children the elderly and the Temperature pressure relief physically or mentally disabled valve must comply with ANSI are at highest risk for scald injury Ni Z21 22 CSA 4 4 and ASME Feel water before bathing or showering Properly sized temperature Temperature limiting valves are pressure reler available N installed in opening provided Read instruction manual for safe Can result in overheating temperature setting and excessive tank pressure Can cause serious injury or death Read and understand instruction manual and safety messages before installing operating or A WARN NG servicing this water heater e Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is Instruction manual must remain turned with water heater Failure to follow instructions and safety messages could result in death or serious injury Failure to do this could result in death serious bodily injury or property damage CAUTION Improper installation and use may result AWARN N G in property damage Excessiv
26. box Check that connector CN207 on control board is seated e Check wires for damage The internal protector of fan motor may be open or the fan motor is broken Check the fan motor refer to Checking the fan motor flowcharts p 30 31 Replace if defective Control board faulty e Replace control board If replacing the control board doesn t resolve the issue contact technical support 39 Fault Code Troubleshooting Guide Ambient Temperature Sensor Short or Open or Ad Error Ambient temperature sensor circuit is not functioning Loose connection or damaged wire Turn off power at the circuit breaker fuse box e Check that connector CN212 on control board is seated Check wires for damage Ambient temperature sensor is shorted or open Unplug ribbon cable from CN212 check resistance between pins 1 and 2 of the ribbon cable connector Refer to chart 1 p 33 for expected resistance value If the measured resistance is gt 40kQ 00 the thermisitor is faulty Replace thermisitor assembly Control board faulty Replace control board If replacing the control board doesn t resolve the issue contact technical support Upper Temperature Sensor Short or Open or Ad Error Upper temperature sensor circuit is not functioning Loose connection or damaged wire Turn off power at the circuit breaker fuse box e Check that connector CN204 on control board is seated Check wires f
27. breaker fuse box and check for a loose connection at the element For access directions see Heating Element Replacement p 24 Lower element faulty Check resistance of the element itself to see if it is around 28 Q If it is broken replace non functioning element See Heating Element Replacement p 24 Important Using an element greater than 2000 watts in place of the lower element will damage the water heater and void the warranty Control board faulty Ifthe error still persists this problem may be caused by the control board Replace the control board Heat Pump Connect Fault Heat pump compressor circuit is open Loose connection or damaged wire Turn off power at the circuit breaker fuse box Check wire harness connections at compressor control board run capacitor and compressor relay Inspect wires for damage Compressor thermal protector open Compressor will restart after coolling off Faulty run capacitor Check the capacitor see Checking the Run Capacitor p 26 replace if defective Control board faulty Replace control board If replacing the control board doesn t resolve the issue contact technical support Compressor faulty Check the compressor refer to the Checking the compressor flowchart p 28 replace if defective Fan Connect Fault Heat pump fan circuit is open Loose connection or damaged wire Turn off power at the circuit breaker fuse
28. ckage Loose connection or damaged wire in the condensate pump failure detect circuit Check control wire for connections to condensate pump If error persists see Condensate Pump Troubleshooting p 46 Power Anode Over Current Powered anode circuit not working Faulty control board Replace control board replacing the control board doesn t resolve the issue contact technical support Power Anode Max Current at Min PWM Powered anode circuit not working Faulty control board Replace control board If replacing the control board doesn t resolve the issue contact technical support Power Anode Offset Current Powered anode circuit not working Faulty control board Replace control board replacing the control board doesn t resolve the issue contact technical support 43 Fault Code Troubleshooting Guide Power Anode Drive Voltage LT Tank Voltage Powered anode circuit not working Anode shorted to tank or upper element Check for short circuit 1 Disconnect the red wire from the tab on the anode use an Ohm meter to check between the wire tab on the anode and the tank A low reading should be 2 1 mega ohm indicates a short 2 If short take out the upper element and re check if no longer short make sure the upper element is a folded type maximum 10 inches long Replace if wrong element 3 Ifthe short persists the anode may be bent and touching the tank Remove the anode s
29. commended for periods of three 3 days or more in which the water heater will be idle Vacation Mode minimizes energy consumption and minimizes below the display There are two 2 conditions for the power button indicated by color RED the unit is in STANDBY and power is applied to the unit GREEN the the risk of freezing during cold weather unit is ON Press the power button to turn the unit on if NOTE To activate Vacation Mode touch the needed Vacation Mode button To deactivate Vacation NOTE All buttons on the User Interface are touch Mode touch the Vacation Mode button again sensitive and require only a light touch Adjusting Set Point Temperature Other Controls The water temperature can be adjusted from 95 F to 150 Use the Up and Down Buttons LA on a J Lock Holding this button for more than 3 the UIM to set the desired temperature seconds switches the lock mode on or off IMPORTANT Before attempting to adjust the When the D edule 9 esta thermostat read the information on water temperature symbol and Lock text will be visible on the adjustment above If the instructions are not clear display and there will be no access to mode contact a qualified person change or set point change IMPORTANT Filling a spa or hot tub from this water F C The button switches the display to heater may result in extended recovery re heat time show the set temperature in Fahrenheit or Switching te
30. e Follow the procedure below for best results 1 Shut off power to the unit at the breaker or fuse box prior to servicing the unit 2 Remove the air inlet and outlet grills Important Do not spray cleaner on the fan motor Loosen and remove the four 4 nuts that mount the fan assembly to the fan shroud Lower the fan assembly and carefully rest it in the area adjacent to the condensate pan Cover the fan assembly to protect the motor from the evaporator cleaner Important Do not damage the fan blades Cleaner should be applied to the inlet left side of the evaporator only Spray evaporator cleaner on the evaporator working from the top down Do not over apply cleaner use only enough to clean the evaporator Clean the fan blades by carefully wiping each one with a damp cloth Clean the condensate pan by wiping with a damp cloth to remove any dirt that may be present Re install the fan assembly and both side panels 35 Troubleshooting Common Service Problems As first step in diagnosis and troubleshooting the unit should be disconnected from power at the breaker fuse panel for ten seconds then reconnect power to the unit and determine if the noted error code still appears The process of waiting for the error code to reappear may take about 8 minutes for the initial power initialization of the unit PROBLEM POSSIBLE CAUSE TEST CORRECTIVE ACTION NO HOT WATER No power to the water heater O
31. e Weight Hazard Do not operate water heater if flood damaged Inspect and replace the anode as needed Use two or more people to move and install Install in location with drainage Fill tank with water before operation water heater alert for thermal expansion Failure to do so can result in back or Refer to instruction manual for installation and service other injury A WARNING Fire Hazard Electric Shock Hazard Do not use this water heater with any voltage other than shown on the model rating plate Failure to use the correct voltage shown on the model rating plate could result in death serious bodily injury or property damage Installation Checklist Water Heater Location Centrally located with the water piping system flooring beneath the water heater must be able to support the weight of the water heater when filled with water see Table 1 TABLE 1 Weight of water heater full of water Capacity 60 Gallon 80 Gallon Located indoors such as a basement or garage and in a vertical position Protected from freezing temperatures Provisions made to protect the area from water damage Metal drain pan installed and piped to an adequate drain Sufficient room to service the water heater e Sufficient air for the heat pump to function The approximate minimum air requirement is 750 cubic feet of space For example this would be a room approx
32. e line Closed System Thermal Expansion As water is heated it expands thermal expansion In a closed system the volume of water will grow As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion Thermal expansion can cause premature tank failure leakage This type of failure is not covered under the limited warranty Thermal expansion can also cause intermittent temperature pressure relief valve operation water discharge from the valve due to excessive pressure build up The temperature pressure relief is not intended for the constant relief of thermal expansion This condition is not covered under the limited warranty A properly sized thermal expansion tank should be installed on all closed systems to control the harmful effects of thermal expansion Contact a plumbing service agency or your retail supplier reguarding the installation of a thermal expansion tank General Service information Volts times Amps Watts Element Cycling Watts divided by Volts Amps Most two element water heaters are non simultaneous In other words only one element Replacement Elements operates at a time Use replacement elements that are rated at the same wattage voltage and shape indicated on the heater model and rating plate Installing an element with a higher voltage rating or wattage output may create a safety hazard It could overload the heater wiring the s
33. e the cover is securely engaged on the attachment points 14 Replace the foam block and access cover 15 Although this water heater is equipped with Dry Fire protection circuitry be sure tank is completely filled with water before applying electrical power to the water heater Figure 14 5 Remove the access cover then remove the foam insulation block 6 Remove the protective plastic cover from the attachment point 7 Disconnect the electrical wires from the heating element by loosening the screws Figure 14 Remove the screw in element by turning the element counterclockwise with a 1 1 2 inch socket wrench Remove the existing gasket Figure 15 Screw in Element Gasket 24 Energy Cutout ECO Switch Troubleshooting ECO Function and Troubleshooting An energy cutout ECO switch is installed on this water heater to shut down the water heating means in the event of a malfunction If the upper tank temperature reaches 190 F the ECO contacts will open breaking the L1 and L2 legs that feed the upper heating elements The ECO also interrupts power to the compressor control relay which in turn shuts off power to the compressor Some models will not have a compressor relay in which case the compressor will be controlled directly by the ECO Refer to the wiring diagram located on the control box cover to see if a given unit is equipped with a compressor control relay If the ECO has tripped it must be
34. eater and orient it or provide 10 tubing so that any discharge from the valve exits only within 6 in 152mm above drain or at any distance below the structural floor and does not contact any live electrical part The discharge opening must not be blocked or reduced in size under any circumstance IMPORTANT Only a new temperature and pressure relief valve should be used with your water heater Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater Do not place any valve between the relief valve and the tank The Temperature amp Pressure Relief Valve Shall not be in contact with any electrical part e Shall be connected to an adequate discharge line e Shall not be rated higher than the working pres sure shown on the data plate of the water heater The Discharge Line Shall not be smaller than the pipe size of the relief valve or have any reducing coupling installed in the discharge line Shall not be capped blocked plugged or contain any valve between the relief valve and the end of the discharge line Shall terminate a maximum of 6 in 152mm above a floor drain or external to the building In cold climates it is recommended that the discharge pipe be terminated at an adequate drain inside the build ing Shall be of material listed for hot water distribution Shall be installed to allow complete drainage of both the valve and discharg
35. ee Powered Anode Troubleshooting p 27 and carefully straighten if bent 4 Check the anode for a short by placing one Ohm meter probe on the steel nut the other on the tab connector If resistance is low reading should be 2 1 mega ohm replace the anode Power Anode ADC Error Powered anode circuit not working Faulty control board Replace the control board If replacing the control board doesn t resolve the issue contact technical support Power Anode No Tank Voltage Powered anode circuit not working Anode shorted to ground Anode may be shorted to tank or element Check for short see Powered Anode Flowchart p 29 Low water level Check water level fill the tank if necessary Power Anode No Current Sense Powered anode circuit not working Faulty control board Replace the control board replacing the control board doesn t resolve the issue contact technical support Power Anode Wrong Voltage Feedback Powered anode circuit not working Anode internally shorted shorted to tank or upper element Refer to Powered Anode Flowchart p 29 Control board faulty f anode is not shorted in any way replace control board No Display on User Interface Module UIM Confirm that there is no power to the unit Determine if UIM or control board is faulty water heater heats water compressor runs or elements turn on troubleshoot UIM water heater does not heat water
36. ervice ground COIL TEMP SENSOR 1 Phase wer supply R 59 1 1 5 9 A mD DISCHARGE TEMP SENSOR 85 2 mm AMBIENT TEMP SENSOR rm 5 8 00 8 2 a a a TANK LOWER TEMP SENSOR a EN 5 I B B TANK UPPER TEMP SENSOR NEN m E RED n GREE I 5 5 ANODE POWERED DISPLAY REEN 1 T 8 04 203 CNet 12 TANK ANODE POWERED HP TEMP TEMP wuite UPPER CT ho ELEMENT WHITE OVERFLOW SWITCH CAPACITOR LOWER 1 ELEMENT HEAT PUMP WATER HEATER CONTROLLER GREEN TANK JACKET GREEN GREEN GROUNDING D Dy x STRIP GREEN TANK UPPER TEMP SENSOR L 5 e HIGH LIMIT SWITCH BLACK eo WHITE UPPER ELEMENT BLACK 4 A TANK LOWER JUNCTION TEMP SENSOR BOX 4 5 KW c c BLACK ANODE POWERED a WHITE FANK LOWER ELEMENT 2KW PP ee NOTES 1 THE FUNCTION OF CN211 AND CN215 IS THE SAME EITHER CN211 OR CN215 SHOULD BE CONNECTED TO COMPUTER BY SPECIAL CONNECTOR 2 IF ANY OF THE ORIGINAL WIRE AS SUPPLIED MUST BE REPLACED USE THE SAME SIZE ONLY TYPE 105 C THERMOPLASTIC OR EQUIVALENT 3 TANK LOWER ELEMENT MUST NOT EXCEED 2KW 20 FIELD INSTALLED FACTORY INSTALLED RESERVED UIM CONNECTION OPTIONAL OVERFLOW SWITCH NORMALLY CLOSED Accessing the Maintenance Display
37. et for element removal Appropriate extensions Thermometer Water pressure gauge Flashlight Drill Amp meter clamp type Digital multimeter shown Supplies for servicing residential electric heat pump water heater models e Chlorine Bleach for chlorination procedure as well as algae scale removal from condensate drain pan Cotton swabs to check for minor leaks Teflon tape or approved thread sealant All Purpose ABS PVC Cement Un Lime or Mag Erad for removal of scale 3 Terms Definitions and Formulas First Hour Rating FHR is a volume of hot water delivered by a water heater during a 1 hour Department Of Energy mandate test procedure The FHR is given in gallons or liters Energy Factor EF is an indicator of the combined thermal efficiency and standby efficiency of a water heater The higher the Energy Factor the more efficient the water heater will be Recovery rate is the amount of water expressed in gallons per hour GPH heated to a given temperature rise Residential water heaters are typically rated at approximately 90 F temperature rise IE A standard electric water heater with one 4 5 kW kilowatt electric heating element can produce 20 GPH at an approximate 90 F rise Temperature rise is the increase in the temperature from its coldest inlet water temperature to the desired hot outlet setting Standby efficiency relates to the ability of the product to retain the s
38. f removing the water heater for service or replacement Figure 2 Union gt Temperature and Pressure Relief Valve 5 Hot Outlet Shut off Valve Hot I Untempered Water Outlet Mixing Valve Follow the Mixing Valve s 3 Some local codes may require and the manufacturer of this water heater recommends installing a mixing valve or an anti scald device in the domestic hot water line as shown Figure 2 or at the point of use These valves reduce the point of use temperature of the hot water by mixing cold and hot water and are readily available Contact a licensed plumber or the local plumbing authority for more information 4 Some local codes may require and the manufacturer of this water heater recommends installing a pressure reducing valve PRV in the cold water inlet line where it enters the residence as shown Figure 2 5 If installing the water heater in a closed water system install an expansion tank in the cold water line as specified under Closed System Thermal Expansion p 10 6 Install a shut off valve in the cold water inlet line It should be located close to the water heater and be easily accessible Know the location of this valve and how to shut off the water to the heater 7 Install a discharge line from the temperature and pressure relief valve in the opening marked T amp P RELIEF VALVE See Figure 3 and the Temperature and Pressure Relief Valve p 10
39. he eight 8 screws attaching the left louvered panel to the top of the unit and set aside Using a 2 Phillips screwdriver remove the two 2 screws from the control board cover located inside the top of the unit on the right side then remove the cover by lifting up and out Locate the ribbon cable and disconnect from either CN211 or CN215 Thread the connector through the plastic grommet on the bottom left side of the control box Remove the seven 7 screws attaching the shroud to the top of the unit and carefully lift the top up and away from the unit Compressor Check Flow Chart Compressor Fault Compressor Fault Table 4 C C R Check maintenance display Put unit in stand by Turn power off at breaker fuse panel Verify connections C GROUND and insure they are R GROUND seated full S GROUND Values with 240 VAC input R S S Check Compressor Hot Allow compressor to shell temperature cool thermal switch to reset Cool Restore power at breaker fuse panel press power button and verify that unit is Wait eight 8 minutes for compressor time out No Raise set point 10 Yes Wait ten 10 seconds No for compressor to turn on Check CN207 on control board pin 1 to 3 for 240 VAC Yes Replace fan assembly Replace control board If replacing the control board does not resolve the issue contact technical support Perform voltage and current checks
40. imately 10 X9 1 2 in size with an 8 ceiling NOTE For optimal efficiency the following minimum clearances should be maintained 3 ft on the air inlet side 6 ft on the air outlet side and 2 ft front and back Unrestricted airflow the unit cannot be placed into any type of closet or small enclosure site location must be free from any corrosive elements in the atmosphere such as sulfur fluorine and chlorine These elements are found in aerosol sprays detergents bleaches cleaning solvents air fresheners paint and varnish removers and many other commercial and household products In addition excessive dust and lint may affect the operation of the unit and require more frequent cleaning see Cleaning Replacing the Air Filter section p 11 Ambient air temperature must be between 45 F and 109 F inclusive in order for the heat pump to work properly If the ambient air temperature falls outside these upper and lower limits the electrical elements will activate to meet hot water demand Water System Piping Temperature and pressure relief valve properly installed with a discharge pipe run to an adequate drain and protected from freezing All piping properly installed and free of leaks Heater completely filled with water see Water Piping System section p 9 Closed system pressure buildup precautions installed see Closed System Thermal Expansion section p 10 Mixing v
41. ing anode a powered anode does not lose effectiveness over time The powered anode circuit is made up of an electronic control a titanium anode rod and the water heater tank The electronic control monitors conditions in the tank and produces a voltage that will prevent galvanic corrosion from occurring The titanium anode rod consists of two functional parts A steel body which threads into the tank providing mechanical and electrical connection to the tank and a titanium rod that is electrically insulated from the body The voltage produced by the powered anode circuit is delivered to the titanium anode rod by a red wire connected to the tab that connects to the anode rod Current flows from the titanium anode rod through the water and to the grounded tank wall The powered anode circuitry will maintain the minimum voltage required to protect the tank steel Fault detection is built into the powered anode software If a fault is detected an error message will be displayed on the User Interface Module UIM Powered Anode Fault By checking the fault code history see Accessing the Maintenance Display p 21 a specific fault code can be read to aid in isolating the cause Refer to the Fault Code Troubleshooting Guide p39 44 for the list of powered anode fault messages what the messages indicate possible causes and corrective actions IMPORTANT The anode protecting the tank requires power to the unit to operate
42. int temperature mode of operation temperature units F or C and to check the operating condition of the heat pump through the maintenance display see Accessing the Maintenance Display p 21 Initial Start Up When powered up for the first time or when power is re applied after a power outage or service work is performed the control will run the dry fire check to establish that the tank is completely filled with water see Dry Fire Element Protection p 8 The UIM will display Dry Fire during this operation which will take about four 4 minutes After eight 8 minutes have elapsed the fan should come on after an aditional thirty 30 seconds the heat pump compressor should turn on Note that during the initial start up the heat pump will come on regardless of operation mode selected This is intended to allow for evaluation of the heat pump to ensure that it is operating properly The heat pump will heat water until the set point temperature is reached in the tank it will then shut off After this initial start up is complete the water heater will operate per operational mode setting ambient air and tank water tamperatures and set point temperature 12 Operating Your Heat Pump Water Heater f amp N Vacation Mode The set point changes to 60 F Turning the Unit On which is the temperature that will be The power button is located at the bottom of the UIM maintained This mode is re
43. ired see details in the Element Test section p 22 23 Drain and flush tank Water conditioning may be necessary to minimize build up Upgrade to larger capacity water heater Troubleshooting Common Service Problems PROBLEM POSSIBLE CAUSE TEST CORRECTIVE ACTION HIGHER THAN EXPECTED OPERATING COSTS DRIP FROM TEMPERATURE amp PRESSURE RELIEF VALVE Warning Do not plug or cap T amp P discharge pipe LEAKS AROUND THE ELEMENTS Electric mode selected Ambient air temperature preventing compressor operation Air filter dirty Temperature set point too high Water connections to unit reversed Heat lost through long run of exposed pipe or a recirculation system Hot water leak at faucet or piping Sediment or scale build up in tank Excessive water pressure Add or service a thermal expansion tank Malfunctioning Temperature amp Pressure Relief Valve The heat pump does not run in efficiency mode The gasket and or threads are leaking 37 Change to efficiency or hybrid for reducing energy costs Ambient air temperature must be gt 45 F and lt 109 F to enable compressor operation Clean or replace air filter Decrease set point temperature see Adjusting Set Point Temperature section p 13 Ensure the cold connection is at the bottom and that the hot connection is at the top Insulate exposed piping It may be necessary to discontinue use of re circulation system Repair ho
44. itting Refill tank p 45 Restore power See also Leaks Around the Elements Call technical support before replacing the water heater Check to see if the drain valve is closed tightly If the leakage cannot be stopped by tightening the valve replace it Although milky water may not be completely eliminated it can be reduced by installing aerated faucets Treat the water heater with a deliming solution e g Mag Erad or Un Lime The directions for the product should be followed explicitly To prevent damage to the water heater and plumbing system install a water hammer arrestor Fault Code Troubleshooting Guide Upper Element Connect Fault Upper heating element circuit is open Loose connection or damaged wire Turn off power at the circuit breaker fuse box and check for a loose connection at the element For access directions see Heating Element Replacement p 24 Upper element faulty Check resistance of the element itself to see if it s around 12 4 0 If it is broken replace non functioning element See Heating Element Replacement p 24 Control board faulty Ifthe error persist the problem may be caused by the control Replace the control board If replacing the control board doesn t resolve the issue contact technical support Lower Element Connect Fault lower heating element circuit is open Loose connection or damaged wire Turn off power at the circuit
45. l Board Sectlon cite RR re e rg e af e 17 Control Board Section D iae edid ortae Ne ete re on eise bob abies 18 Wiring conie tot e ctn te tI o teret bad caede eof te n edet due 19 20 Accessing Maintenance Display U U ie cda diea deed duce ne edd e beh ek n dea ed dun 21 22 Element Test Continuity Check nette u ku Element Test Ohm s Check E e ba et opt e da ERE 23 Heating Element Replacement sie kernen tace ee Lease nde etd lee dte ede deo a cete eee dag eee 24 Energy Cutout ECO iter ene o nii eere cd eer 25 R n erede tee t erede 26 Powered Anode Replacement Removing the Shroud ssssssssseeeeeee ene 27 Component Check Flowcharts cece cea eaanaeceeeeeeeee ee nennt r 28 31 Temperature Sersors ou eer etta et ei ea aaa Me SS ka RR eb etienne e ode eee tede 32 Resistance vs Temperature Gliar Su uuu asun Z Sa a kuya au enne a uay 33 R 134a Temperature Chart uu uu u uuu u D Lo tne Lade e sania eee dde vae stars 34 Cleaning th Evaporator iian unha eel eae ak du tpe een t en deb os e egal 35 nnne akak teris sites d net sensn nene n nnne 36 3
46. manually reset as follows below Resetting a tripped ECO 1 Shut off power to the unit at the breaker fuse panel prior to servicing the unit 2 Gain access to the ECO located in the upper element compartment above the element 3 Check the temperature of the tank In order to manually reset the ECO the tank temperature must first drop below 120 F 4 Press the red button located on the front of the ECO 5 Apply power to the unit Once the ECO has been reset the fault on the user interface module should clear and the water heater should return to normal operation If resetting the ECO does not clear the error the ECO will need to be checked Follow the procedure below NOTE Tank temperature must be less than 120 F in order to re set ECO TABLE 3 Relay Number Check Pins Checking the ECO 1 Shut off power to the unit at the breaker fuse panel prior to servicing the unit 2 Gain access to the ECO located in the upper element compartmant above the element 3 Remove the black wire from terminal number one 1 and the white wire from terminal number three 3 on the ECO 4 Using an Ohm meter or continuity tester check pin 1 to pin 2 there should be continuity very low resistance If resistance is high or continuity checks bad replace the ECO Check pin 3 to 4 again there should be continuity If not replace the ECO Investigate cause of ECO tripping It is very important to investigate why the
47. minals and the other test probe on the element flange or tank shell Ensure a good ground connection B Repeat the test for the other element terminal C If either test shows continuity the element is 22 A WARNING Before removing any access panels or servicing the water heater make sure the electrical supply to the water heater is turned OFF Failure to do this could result in death serious bodily injury or property damage D defective and should be replaced p 24 Proceed to Completing the Test Completing the Test Replace the element s if necessary p 24 Reconnect the terminal wires Reinstall the thermostat cover s put the insulation back in place then reinstall the cover panel s Make sure that the tank is full of water before reconnecting power A B Figure 12 Open a hot water faucet Once water flows smoothly from the hot water side of the faucet all air has been purged from the tank and it is safe to energize the elements Reconnect power to the water heater Element 69 J Element Test OhmMeter I Preparing for the Test 1 Press the power button on the User Interface Module 1 Turn off power to the water heater at the breaker or disconnect switch serving the water heater 2 Verify there is no power at the incoming power connections to the water heater with an AC volt meter 3 Remove the cover panel s then move the
48. mporarily to Hybrid Mode or Electric Celsius Mode will decrease the recovery re heat time Be sure to switch back to the desired operational mode when finished The factory temperature set point is 120 F Notify homeowner if the set point is increased above 120 at any time for any reason Return the set point to a safe level upon completion of service work Selecting Operating Mode Figure 4 User Interface Module UIM The operating mode can be changed by touching the desired mode icon on the User Interface Module Figure 4 Operational Mode Buttons NOTE While vacation mode is on the other modes cannot be selected and set point temperature can not be changed Turn off vacation mode by pressing the vacation mode button Desired mode and set point can now be selected EFFICIENCY HYBRID ELECTRIC VACATION Water Efficiency Mode Is the most energy efficient mode This mode uses the heat pump to heat ea see water in the tank The elements are not used aom ENS 11 Water Heater unless the ambient operating temperature is L Lt Mode Status below 45 F or above 109 F poe i ses HEAT PUMP Water Heater 2 m Efficiency Status 5 Hybrid Mode Combines high energy efficiency hs bs with reduced recovery time This mode uses Heat Pump Tr ET a iii 75 A the heat pump as the primary heating source Functioning The heating element will
49. n Off switch is off Unit in Vacation mode High temperature limit switch open Non functioning upper temperature sensor Inlet or outlet water valves at the water heater closed INSUFFICIENT HOT WATER Temperature set point too low I SLOW HOT WATER RECOVERY Inlet or outlet valves at the water heater are partially closed Air filter dirty Hot water usage pattern exceeds the capability of the water heater in current mode Water connections to unit reversed Heat lost through long run of exposed pipe Hot water leak at faucet or piping Non functioning heating element Sediment or scale build up in tank Water heater may be under sized 36 Check for blown fuse or tripped breaker Restore power to the unit then press power button Press On Off switch should be illuminated green when energized Press Vacation button to turn off Reset the high temperature limit switch see ECO Switch Trouble shooting p 25 Perform temperature sensor resistance test procedure p 32 replace sensor if defective Insure valves are fully open Increase set point temperature see Adjusting Set Point Temperature section p 13 Insure valves are fully open Clean or replace air filter Change to diffrent mode or modify usage patterns Ensure the cold connection is at the bottom and the hot connection is at the top Insulate exposed piping Repair hot water leaks Test elements and replace as requ
50. nd functions see Adjusting the User Interface Module Operating Modes p 12 13 Understand the various Operating Modes and which mode may be best based on season ambient temperature and usage see Operating Mode Description p 12 13 NOTE It may be necessary to temporaily change modes if for example filling a spa or hot tub Installation Instructions and Use amp Care Guide should be kept with the water heater for reference Potential Installation Issues Symptom Case Solution O Temperature set to 60 F and not Vacation mode is on Turn off Vacation mode by pressing adjustable the Vacation button Electric mode selected but the Upon initial start up the heat No action is necessary heat pump is running pump will run until the tank If after heat pump operation has bap been verified and element heating PONS is iS Cone is desired lower the set point heat pump operation can temperature to 95 F The heat verified The water heater pump will shut off when the tank will operate according to the temperature is gt 95 F Set the selected mode after this first temperature to the desired set point run The elements will now be used for heating in Hybrid and Electric modes Power is applied to the unit but The unit is in Standby the Press the power button it should turn there is no display on the User power button on the UIM is green and the display should light
51. o heat water By doing so heat pump water heaters can operate much more efficiently and at significantly lower costs compared to standard electric water heaters This heat pump water heater has four 4 operating modes for maximum flexibility in meeting hot water needs under a variety of conditions Available modes are Efficiency Hybrid Electric and Vacation Operating Mode Descriptions Efficiency Mode provides the highest efficiency and lowest cost operation by using only the heat pump to heat water Recovery time and efficiency will vary with ambient temperature and relative humidity Efficiency will be greatest when both are high and recovery time will be shortest At lower temperatures and relative humidity levels efficiency will be lower and recovery will take longer Heat pump operation is allowed from 45 F to 109 F ambient temperature At ambient temperatures lower that 45 F and greater than 109 F the heat pump will not operate Similarly if the water temperature in the tank is less than 59 F the heat pump will not operate The unit will operate in electric mode until ambient and water temperatures return to the safe operating range of the heat pump Hybrid mode provides the best combination of energy efficiency and hot water delivery The heat pump will be used to heat water after moderate hot water use When a large quantity of hot water is used the upper electric heating element will heat water in order to speed u
52. o longer hot 4 De pressurize the water heater by closing the cold water supply valve to the water heater and opening a nearby hot water faucet 5 The powered anode is located on the left side of the heat pump compartment and is between the compressor and the evaporator 6 Remove the top housing see Removing the Top Housing below to gain access to the powered anode 7 Un plug the red wire from the powered anode 8 Usea 1 1 16 inch deep well socket with extension and long breaker bar to loosen and remove the powered anode Replacing the Powered Anode 1 Apply a small amount of thread sealant to the threads of the replacement anode Do not get thread sealant on anode 2 Thread the anode into the spud and torque to 50 Ib ft 3 Connect the red wire to the tab on the powered anode 4 Re fill the tank with water 5 Apply power to the water heater and press the power button if needed to turn it on 6 Wait eight 8 minutes for the dry fire detection to run and for water heating to begin 7 Monitor the UIM to see if the powered anode fault repeats It may take up to 70 minutes for a powered anode fault to appear the Top Housing Shroud Press the power button on the User Interface Module UIM to place the water heater in standby mode Note Power to the board is still present at this time Terminate all power to the unit at the breaker fuse panel Using a 2 Phillips head screwdriver remove t
53. or damage Upper temperature sensor is shorted or open Unplug ribbon cable from CN204 check resistance between pins 1 and 2 of the ribbon cable connector Refer to chart 2 p 33 for expected resistance value If the measured resistance is gt 200 or 00 the thermisitor is faulty e Replace thermisitor assembly Control board faulty Replace control board If replacing the control board doesn t resolve the issue contact technical support Lower Temperature Sensor Short or Open or Ad Error Lower temperature sensor circuit is not functioning Loose connection or damaged wire Turn off power at the circuit breaker fuse box e Check that connector CN204 on control board is seated Check wires for damage Lower temperature sensor is short or open Unplug ribbon cable fron CN204 check resistance between pins and 4 of the ribbon cable connector Refer to chart 2 p 33 for expected resistance value If the measured resistance is gt 200kQ or 00 the thermisitor is faulty Replace thermisitor assembly Control board faulty Replace control board If replacing the control board doesn t resolve the issue contact technical support Discharge Temperature Sensor Short or Open or Ad Error Discharge temperature sensor circuit is not functioning Loose connection or damaged wire Turn off power at the circuit breaker fuse box Check that connector CN212 on control board is seated
54. p recovery Once the upper portion of the tank reaches set point the element will shut off and the heat pump will heat water until the average tank temperature reaches set point Hybrid mode provides the highest first hour hot water delivery with excellent economy Electric mode allows operation like a standard electric water heater using the upper and lower heating elements to heat water The heat pump is not used in this mode The key advantage of using this mode is that it eliminates the cool air exhausted from the heat pump During cold weather months this may be desirable Hot water delivery and operating costs are comparable to a standard electric water heater with similar tank capacity Vacation mode should be used when hot water will not be needed for a period of time greater than three 3 days In vacation mode electric elements are used to heat water and set point is a non adjustable 60 F Minimal electricity will be used and maintaining 60 F minimizes the risk of the water heater freezing in cold weather User Interface Module Overview The User Interface Module UIM is used to control the heat pump water heater It displays useful information about the operating status of the water heater the selected mode of operation and the set point temperature Fault information will be displayed should a malfunction occur with one of the components or sub systems The UIM also is used to set the water heater to the desired set po
55. plicable local codes that may exist Guidelines for HVAC systems are applicable to the heat pump water heater Inspection Cleaning of the Condensate Drain Pan amp Condensate Drain Lines IMPORTANT Before attempting to clean or replace the condensate drain pan or lines press the power button to place the water heater in Standby Mode and shut off power to the water heater at the circuit breaker fuse box Remove the access panel fan side by loosening the screws securing it to the unit Check the condensate drain pan and drain lines for any dirt or debris that might interfere with proper drainage 1 2 3 Wipe out any dirt or debris with a damp cloth Once the condensate drain pan and lines have been inspected cleaned secure the access panel to the water heater Restore power to the water heater and press the power button to turn the water heater on NOTE The water heater will conduct an eight 8 minute system diagnostic prior to operation 46 Service Parts List for 60 and 80 Gallon Heat Pump Water Heaters Item Part Number 1 Ambient Discharge Coil Temperature Sensor 9007473015 2 Upper Lower Temperature Sensor Assembly u eee 9007474015 3 Run 3 9007475005 4 Compressor Control 9007476005 5 Electronic Control Board ree devise nie ene egere ege dede nud 9007477005 6 User Interface Module
56. power to the water heater at the breaker 8 th here th ket fits to the tank If disconnect switch serving the water heater U WASTE he Ir 10 re tan you are replacing the bottom element remove any 2 Verify there is no power at the incoming power accumulated sediment on the bottom of the tank connection to the water heater with an AC volt 9 Make sure the replacement element has the meter correct voltage and wattage rating and shape by 3 Open a nearby hot water faucet and allow to run matching it to the rating plate on the water heater until the water is no longer hot Position the new gasket s on the element and 4 Drain the water heater by connecting a hose to insert it into the water heater tank Figure 15 the drain valve and terminating it to an adequate Tighten the element by turning it clockwise until drain or to the exterior of the building When unit secure is drained close the drain valve and remove 10 Close the drain valve and open the nearest hot hose water faucet Then open the cold water shut off valve and allow the tank to fill completely with water To purge the lines of any excess air and sediment keep the hot water faucet open for three 3 minutes after a constant flow of water is obtained 11 Check for leaks around the element Element 12 Reconnect the electrical wires to the element and securely tighten the screws See Figure 14 13 Replace the protective plastic cover removed earlier Make sur
57. rational issues codes E01 E04 will be helpful in troubleshooting efforts The fault history can not be cleared or reset There will always be codes stored whether there is an actual fault or not Message Meaning e Coil Temperature Measured at evaproator Foutcode Historical Faut E __ historical Faut E ___ Code historical faut 21 Element Test Continuity Tester I Preparing for the Test 1 Press the power button on the User Interface Module UIM 2 Turn off power to the water heater at the breaker or disconnect switch serving the water heater 3 Verify there is no power at the incoming power connections to the water heater with an AC Volt meter 4 Remove the cover panel s then move the insulation away from the element Do not damage the insulation 5 Remove the thermostat cover s 6 Disconnect the wires from the element terminals Testing for a Burned Out Element 1 Complete Preparing for the Test before you proceed 2 Place one test probe on each of the element terminals 3 If there is no continuity replace the element p 24 If there is continuity proceed to Testing for a Grounded Element IIB Testing for a Grounded Element 1 Complete Preparing for the Test before you proceed 2 Checkfor continuity as follows A Place a test probe on one of the element ter
58. rials in the installation area Presence of combustible materials near the water heater After servicing this water heater check to make sure it is working properly see Operational Overview Initial Start Up p 12 IMPORTANT If you lack the necessary skills required to properly perform this visual inspection you should not proceed but get help from a qualified person Cleaning Replacing the Air Filter Air Filter Cleaning Replacement IMPORTANT Before attempting to clean or replace the air filter press the power button to place the water heater in Standby Mode and turn off power to the water heater at the circuit breaker fuse box 1 Locate the screw securing the filter panel to the heat pump shroud and remove it 2 Remove slide the filter from the unit 3 If you are replacing the filter skip to step 4 To clean the filter use a vacuum with a hose attachment to remove any dust or debris 4 Place the new or cleaned filter into the filter panel and secure the filter to the shroud with the screw loosened earlier Use the slots for guides when inserting the filter into the water heater and replace the screws 5 Restore power to the water heater and press the power button to turn the water heater on NOTE The water heater will conduct a system diagnostic prior to operation 11 Operational Overview Heat Pump Water Heater Operation Heat pump water heaters remove heat from surrounding air and use that heat t
59. rical connection to the tank and a titanium rod that is electrically insulated from the body The voltage produced by the powered anode circuit is delivered to the titanium anode rod by a red wire connected to the tab that connects to the anode rod Current flows from the titanium anode rod through the water and to the grounded tank wall The powered anode circuitry will maintain the minimum voltage required to protect the tank steel Fault detection is built into the powered anode software If a fault is detected an error message will be displayed on the User Interface Module UIM Powered Anode Fault By checking the fault code history see Interpreting the Fault Code History p 21 a specific fault code can be read to aid in isolating the cause Refer to the Fault Code Troubleshooting guide for the list of powered anode fault messages what the messages indicate possible causes and corrective actions IMPORTANT The anode protecting the tank requires power to the unit to operate Do not shut off power to the unit for an extended period of time If power must be turned off drain the tank completely to minimize corrosion 27 Removing the Powered Anode 1 Press the power button on the UIM to place the water heater in Standby Mode Note Power to the board is still present at this time 2 Terminate all power to the unit at the breaker fuse panel 3 Open a nearby hot water faucet and allow to run until the water is n
60. rol board power wire ground CN 202 ECO Bottom Pin1 Connect to lower heating element Pin2 Connect to L1 behind ECO switch CN 206 Compressor Pin 1 Compressor power L1 Pin2 Unused Pin 3 Unused Pin 4 Compressor power L2 CN 207 Fan Low high Pin1 Fan power L1 Pin 2 Unused Pin 3 power FUS 201 Fuse 201 3 250V slow blow fuses the L1 power leg coming to the Control Board FUS 202 Fuse 202 3 Amp 250V slow blow fuses the L2 power leg coming to the Control Board 15 Section B of Control Board Pin 2 Terminal 1 Terminal 2 RY 203 Upper Element Relay Terminal 1 COM Connects to L1 behind the ECO Switch Terminal 2 NO Connects to the upper heating element CN 203 Powered Anode Pin 1 Powered anode signal e Pin 2 Ground 16 3 m 52 9 R34 4 1 659 42 CN 204 Upper and Lower tank water temperature sensors Pin 1 Upper water temperature sensor on tank Pin 2 Upper water temperature sensor on tank Pin 3 Lower water temperature sensor on tank Pin 4 Lower water temperature sensor on tank CN 212 Temperature Sensors Pin 1 Ambient temperature sensor Pin 2 Ambient temperature sensor Pin 3 Discharge temperature sensor Pin 4 Discharge temperature sensor Pin 5 Coil temperature sensor Pin
61. s probably good If the resistance is infinite it shows the capacitor is open or the resistance is steady that the capacitor is partly shorted In either case the run capacitor should be replaced with a unit with the same specifications and dimensions Figure 17 COMPR THERMAL PROTECTOR MOTOR RUN CAPACITOR 26 Powered Anode Troubleshooting and Replacement __ Checking the Powered Anode for Proper Operation When dissimilar metals are in contact with water a galvanic cell will likely result and corrosion of the metal components will occur If left unchecked corrosion will weaken the wall of a water heater tank which will eventually leak Passive anodes are typically used to counteract this corrosion and extend tank life Passive anodes erode over time and become less effective until they stop working all together another type of protective device is a powered anode A powered anode is an active device that counteracts galvanic corrosion in the water heater tank Unlike a standard depleting anode a powered anode does not lose effectiveness over time The powered anode circuit is made up of an electronic control a titanium anode rod and the water heater tank The electronic control monitors conditions in the tank and produces a voltage that will prevent galvanic corrosion from occuring The titanium anode rod consists of two functional parts A steel body which threads into the tank providing mechanical and elect
62. ser Interface Module UIM Maintenance Display see Accessing the Maintenance Display p 21 The water heater can continue to heat water with a faulty temperature sensor but operation will be affected as follows The unit can function with a faulty lower tank temperature sensor Upper tank temperature will be used in place of average tank temperature A fault with the ambient compressor discharge or coil evaporator outlet temperature sensor will cause a HEAT PUMP fault locking out the heat pump The unit will operate as if in ELECTRIC mode until the problem is resolved and the fault is cleared An upper tank temperature sensor fault will lock out all water heating means both heat pump and elements until the problem is resolved and the fault is cleared NOTE After the problem is resolved a fault must be cleared by turning off power to the unit at the breaker or fuse panel for ten 10 seconds and then turning it back on Temperature Sensor Resistance Measurement If a temperature sensor connect fault is indicated by the Maintenance Display or if a temperature sensor issue is suspected use the following procedure to check the sensor s 1 Check the resistance of a suspect temperature sensor by disconnecting the appropriate connector from the control board and placing the meter leads on the corresponding connector pins see Table 4 Note that there are contacts located on the side of each connector that
63. should be used 2 Note the ambient temperature 3 Compare the resistance reading on the appropriate Resistance vs Temperature graph for the sensor being checked If the reading is within 296 of the value obtained from the graph the sensor is good If the value is outside this tolerance the sensor should be replaced A more thorough check of a sensor can be done by checking at high and low temperature extremes Check at low temperature by placing the sensor in ice The reading should be 32 F High temperature can be checked also but do not exceed 130 F for the ambient sensor All other sensors can be checked up to the boiling point 212 F Submerge only the end of the sensor in boiling water do not submerge the wire TABLE 5 Connector Chart Pins Ambient CN212 Chart 1 Pins 1 to 2 Coil CN212 Chart 1 E t Pins 5 to 6 Tank Upper CN204 Chart 2 Pins 1 to 2 Tank Lower CN204 Chart 2 Pins 3 to 4 Discharge CN212 Chart 2 Compressor Pins 3 to 4 Resistance k Ohms Resistance k Ohms Resistance vs Temperature Charts Chart 1 Resistance vs temperature for ambient and coil thermistors 35 30 25 20 15 10 5 0 0 20 40 60 80 100 120 140 160 180 200 220 Temperature F Chart 2 Resistance vs Temperature for Tank and Discharge thermistors 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 0 20 40 60 80 100 120 140 160 180 200 220 Temperature
64. stem or low water level in tank High side pressure is less than 275 psi Disconnect the wires from the high pressure switch and check resistance across the terminals 0 41 Fault Code Troubleshooting Guide ohms indicates good high resistance indicates the switch is defective and should be replaced Heat Pump High Temperature Fault Compressor discharge temperature is too high The refrigerant system may be blocked Check the heat pump piping and evaporator if the tubing or evaporator is covered with frost in one spot this indicates there is a restriction in the system at that point Call technical services for assistance Check the condition of the compressor See the Compressor Check Flowchart p 28 Water temperature is too high control board is not controling the tank temperature properly Check the upper and lower tank thermisitors make sure they are in contact with the tank wall Check the tank temperature sensors see Temperature Sensors p 32 Main Control Board Crystal Fault Main board failure Faulty control board Replace the control board If replacing the control board doesn t resolve the issue contact technical support Main Control Board RAM Fault Main board failure Faulty control board Replace the control board replacing the control board doesn t resolve the issue contact technical support Main Control Board ROM Fault Main board failure
65. t water leaks Drain and flush tank Water conditioning may be required to minimize build up Check water supply inlet pressure If more than 80 PSIG install a pressure reducing valve See Closed System Thermal Expansion section p 10 Replace the Temperature amp Pressure relief valve If ambient temperature is greater than 109 F or less than 45 F the heat pump will not operate Re seal or replace gasket See Heating Element Replacement p 24 for draining and filling procedures See also Leaks around Tank Fittings Troubleshooting Common Service Problems PROBLEM POSSIBLE CAUSE TEST CORRECTIVE ACTION LEAKS AROUND TANK FITTINGS e g drain valve relief valve etc DRIPPING DRAIN VALVE WATER DISCOLORED NOISES Crackling gurgling popping rumbling NOISES Pounding noises or vibrations in pipes The threads are leaking and need to be resealed The spud had developed a leak at the weld Valve may be slightly open Milky water There may be build up gases in the heated water oxygen chlorine carbon dioxide hydrogen sulfide etc Scale lime mineral build up in the water heater Water hammer 38 Insert a cotton swab between the jacket opening and the fitting If the cotton absorbs water follow these steps Disconnect power then drain the tank p 45 Remove the fitting and put thread sealant or Teflon tape on the threads then reinstall the f
66. tored heat Btu while the heating source is not on Insulation and other services are used to increase this efficiency Water for all practical purposes cannot be compressed Water expands when it is heated The volume and pressure of water increases when it is heated in a closed system IE Water heated from 90 F to 140 F in a 40 gallon water heater will expand by approximately one half gallon Minerals and gases will separate from water as temperature increases Amperage Amps 1 phase Watts divided by Volts Ohm s Law KW Required GPH X 8 25 X Temp Rise X 1 0 divided by 3413 Ohms Volts divided by Amperes Ohm s Law One killowatt is equal to 1000 watts One kilowatt is equal to 3 413 BTU Recovery Rate KW X 3413 divided by Temp Rise X 8 25 Rise F KW X 3413 divided by GPH X 8 25 Supply electrical fusing and wiring or breakers should be sized at least 125 of expected heater amperage per NEC and local codes Water weighs 8 25 pounds per gallon at 120 F of Hot water Mixed temp Cold divided by Hot temp Cold This formula gives the number of gallons drawn from the water heater for each gallon delivered at a shower head or faucet If the shower head flow rate gallons per minute is known the draw efficiency and gallon capacity of the water heater may be used to calculate the length of the showering period in minutes Watt Density the density of the wattage output of the element comp
67. unctioning properly but is unable to clear the condensate from the tank make sure the height of the discharge point does not exceed the pump manufacturer s specification Consult the manufacturer s literature for this information Condensate Drain Maintenance Condensate may be produced when the heat pump runs depending on the amount of humidity in the air If the relative humidity is high the amount of condensate can exceed 20 oz per hour The condensate is collected in a plastic pan under the evaporator Two drain ports are provided for connection of primary and secondary drain lines 1 2 inch PVC is recommended for connection to the drain ports The condensate pan drain ports and lines should be inspected and cleaned periodically Shut off power to the appliance before performing any maintenance or repair Access to the drain pan can be gained by removing right side of louver panel The black plastic pan is inside located below the evaporator and the two drain ports are located toward the back of the unit Wipe the inside of the condensate pan with a clean rag to remove any debris or algea that may be present Use an old toothbrush or a bottle brush to clean the inside of the two drain ports Flush the ports with a small amount of clean water Clean the condensate pump if one is installed in accordance with the manufacturer s instructions Disposal of Condensate Condensate should be disposed of in accordance with any ap
68. until the water is no longer hot 4 Close the cold water inlet valve 5 Connect a hose to the drain valve and terminate it to an adequate drain or external to the building 6 Open the water heater drain valve and allow all of the water to drain from the tank Flush the tank with water as needed to remove sediment 7 Close the drain valve refill the tank open the cold water inlet valve and restart the heater IMPORTANT Do not turn on power to the water heater unless it is completely filled with water To ensure that the tank is full open a hot water faucet and allow the water to run until the air is purged and the water flows uninterrupted from the faucet 8 Press the power button to turn the water heater on NOTE the water heater will conduct a system diagnostic prior to operation that takes approximately 8 minutes If the water heater is going to be shut down for an extended period the drain valve should be left open NOTE If the water heater is going to be shut down and drained for an extended period the drain valve should be left open with the hose connected allowing water to terminate to an adequate drain or external to the structure Never use this water heater unless it is completely full of water To prevent damage to the tank and heating element the tank must be filled with water Water must flow from the hot water faucet before turning on power 45 Condensate Pump Troubleshooting Acondensate pump ma
69. upply voltage is extremely low Verify the unit is connected to 240 VAC unit is intended for 240 VAC connection only The unit will not operate below 184 VAC High Temperature Lock Out ECO tripped due to excessivly high tank temperature Eco has detected a tank temperature of 190 5 F and tripped Check the ECO if tripped press red button to reset See ECO Switch Troubleshooting p 25 e Check for faulty control board not shutting off heating means element or heat pump Loose connection or damaged wire Turn off power at the circuit breaker fuse box and check for a loose connection or damaged wire between the ECO and control board Faulty temperature sensor Check the upper temperature sensor refer to Temperature Sensors p 32 for details A faulty lower temperature sensor will not cause this error Faulty ECO Check the ECO with an Ohm meter Pin 1 to 2 and pin to 4 should measure short if they do not press the red reset button and check again If the pins are shorted the ECO is good if not the ECO is faulty and should be replaced Condensate Drain Alarm The installed condensate pump is not working Condensate pump not operating Check to see if condensate pump is plugged in and has power Also check circuit breaker fuse box and GFCI if used Check operation of condensate pump replace if defective Condensate pump drain line is blocked Check condensate pump outlet tube for blo
70. upply wiring or the fusing Installing an element with a lower wattage Also with two element water heaters the lower or voltage rating will reduce performance element and thermostat will cycle more frequently than the upper element and thermostat For this reason the lower element will normally accumulate lime faster and fail more often than the upper element This increased cycling also causes lower thermostats to fail more often than upper thermostats If the upper element fails the customer will lose hot water Power switches to the lower element only after the water at the top of the tank is heated If the lower element or thermostat fails the customer should still have hot water in the top 1 3 of the tank Also select replacement elements with the most surface area low watt density available for your water heater By spreading the heat of the element over a greater area the lime calcium buildup rate should be reduced Elements constructed of Incoloy are much more durable than zinc coated copper elements Routine Preventive Maintenance At least monthly a visual inspection should be made of the following AirFilter Remove and inspect clean if needed and reinstall Condensate drain pan and condensate lines Thelower metal drain pan for standing water which may indicate a clogged condensate drain pan condensate lines or plumbing leak Leaking or damaged water piping Presence of corrosive mate
71. y be necessary if the drain point is above the level of the condensate drain on the heat pump water heater A condensate pump failure detect is provided with the heat pump water heater control Follow the instructions in the installation and operation manual for connection of the condensate pump failure switch to the heat pump control Should the condensate pump fail to operate and clear the condensate from the pump reservoir the float switch provided with the pump will open The heat pump control will detect condensate pump failure and shut off the heat pump in order to stop condensate from being produced HEAT PUMP FAULT will be displayed on the user interface and the heat pump will not operate until the fault is cleared By checking the MAINTENANCE DISPLAY the fault can be narrowed down For a condensate pump failure the MAINTENANCE DISPLAY will indicate CONDENSATE DRAIN ALARM In order to determine the cause of the condensate drain alarm first ensure that the condensate pump has power Check that the condensate pump is plugged into an outlet and that the socket that the condensate pump is plugged into is powered If the pump has power check the outlet tubing for clogs or kinks that could prevent flow of condensate Also check the pump inlet in the sump for debris that might block flow Follow the condensate pump manufacturer s instructions for seperating the pump section from the tank If condensate pump appears to be f
72. y sized temperature pressure relief valve must be installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death Figure 3 Temperature and Pressure Relief Valve Installation Temperature and Pressure Relief Valve Discharge Pipe Do Not Plug or Cap Y Drain Pan 2 1 2 63 5mm Depth Maximum and 2 51mm wider than the water heater 6 152mm Maximum Air Gap Drain Line 3 4 19mm ID Minimum Drain For protection against excessive pressures and temperatures a temperature and pressure relief valve must be installed in the opening marked T amp P RELIEF VALVE Figure 3 To reduce the risk of excessive pressures and temperatures in this water heater install temperature and pressure relief protective equipment required by local codes but no less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of the production of listed equipment or materials as meeting the requirements for Relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems ANSI Z21 22 latest edition This valve must be marked with the maximum set pressure not to exceed the marked maximum working pressure of the water heater Install the valve into an opening provided and marked for this purpose in the water h

HPWH Service Handbook (321549

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