Service Handbook

Residential Hybrid Electric Water Heaters

FOR USE ONLY WITH THESE MODELS: HPTU-50, HPTU-66, HPTU-80 FHPT-50, FHPT-66, FHPT-80 SHPT-50, SHPT-66, SHPT-80

PREVENTIVE MAINTENANCE OPERATION & SERVICE TROUBLESHOOTING

LOW LEAD CONTENT

THIS SERVICE HANDBOOK IS FOR USE BY QUALIFIED SERVICE PROFESSIONALS ONLY. 100268628/2000536109 - Rev A August, 2016 TABLE OF CONTENTS

Basics ...... 3 Completed Installation ...... 3 Safety ...... 5 Required Tools ...... 7 Operation ...... 8 BASICS BASICS Water Temperature Adjustment ...... 8 Operating Mode Descriptions ...... 8 Accessing Maintenance Display ...... 10 Troubleshooting ...... 11 Before Using ...... 11 Drips from T&P Relief Valve Discharge Pipe ...... 11 Post Installation Review ...... 12 Closed System/Thermal Expansion/T&P Drip ...... 12 Checking the Air Charge of the Thermal Expansion Tank ...... 13 Power Cycling the Unit ...... 13 Diagnostic Codes ...... 14-15 Troubleshooting Chart ...... 16-17 Maintenance ...... 18 Testing the Element ...... 18 Replacing the Element ...... 18 Replacing the ECO ...... 19-20 T&P Relief Valve Maintenance ...... 20 Maintenance ...... 21 Changing the Anode ...... 21 System Checks ...... 22 Check Flowchart ...... 22-23 Check Flowchart ...... 24 Appendix ...... 25 Control Board Overview ...... 25-26 Wiring Diagrams ...... 27-29 Repair Parts Lists ...... 30

2 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook COMPLETED INSTALLATION TYPICAL

TYPICAL INSTALLATION FOR 240V OR 208V/240V

Air Filter Condensate Drain Access Cover BASICS BASICS Connectivity Port

User Interface Module (UIM)

xxxxx

xxxxx

xxxxx

xxxxx

Temperature and Shut-off Valve Pressure Relief Valve (Hot)

Upper Element Hot and ECO (Outlet) Primary Condensate Drain (3/4” PVC) Discharge Pipe (Do Not Cap or Plug)

Thermal Expansion Tank

Lower Element

Cold (Inlet)

Drain Valve

Shut-off Valve Drain Pan Drain Line Drain (Cold)

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 3 IMPORTANT SAFETY INFORMATION

Read and follow all safety messages and Important informa on to keep instruc ons in this manual. Fill out this sec on and keep this manual in the pocket of the water heater for reference. This is the safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages Date Purchased: that follow this symbol to avoid possible property damage, BASICS SAFETY serious injury or death. Do not remove any permanent instructions, labels, or the data plate from either the outside of the water Model number: heater or on the inside of the access panels. Keep this manual near the water heater. Serial number:

Maintenance performed:* Date: DANGER indicates hazardous situation that, if not avoided, will DANGER result in death or serious injury.

WARNING indicates a hazardous situation that, if not avoided, could WARNING result in death or serious injury.

CAUTION indicates a hazardous situation that, if not avoided, could CAUTION result in minor or moderate injury.

NOTICE indicates practices not NOTICE related to physical injury.

*Drain and fl ush tank, clean air fi lter, clean condensate pan, and remove and inspect anode rod a er fi rst six months of opera on and at least annually therea er. Operate the Temperature and Pressure Relief Valve (T&P) annually and inspect T&P valve every 2-4 years (see the label on the T&P valve for maintenance schedule). See the Maintenance sec on for more informa on about maintaining this water heater.

4 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook IMPORTANT SAFETY INFORMATION

o reduce the risk of property RISKS DURING OPERATION For informa on about changing the T damage, serious injury or death, factory se ng(s), refer to read and follow the precau ons below, Scalding Risk the “Water Temperature Adjustment” all labels on the water heater, and This water heater sec on in this manual (on page 9). the safety messages and instruc ons can make water hot Even if you set the water heater throughout this manual. enough to cause severe burns instantly, resulting in thermostat(s) to a low se ng, higher temperatures may occur in certain RISKS DURING INSTALLATION severe injury or death. SAFETY circumstances: AND MAINTENANCE • Feel water before bathing or showering • In some cases, repeated small Electric Shock Risk draws of water can cause the Contact with the electrical • To reduce the risk of scalding, hot and cold water in the tank parts in the junction box, to “stack” in layers. If this install Thermostatic Mixing Valves happens, the water can be as behind the access doors (temperature limiting valves) at much as thirty degrees hotter and inside the top shroud can result in each point-of-use. These valves than the thermostat setting. This severe injury or death from electrical automatically mix hot and cold temperature variation is the result shock: water to limit the temperature at of your usage pattern and is not a malfunction. the tap. Mixing valves are available • Disconnect power by opening the from your local plumbing supplier. • Water temperature will be hotter circuit breaker or removing the Follow manufacturer’s instructions if someone adjusted the UIM to a disconnects before installing or higher setting. for installation and adjustment of servicing. the valves. • Problems with the UIM, or other malfunctions may result in higher • Use a non-contact circuit tester to • The User Interface Module (UIM) than expected water temperatures. confirm that power is off before on this water heater have been working on or near any electrical • If the water heater is in a hot factory set to approximately 120°F parts. environment, the water in the to reduce the risk of scalding. tank can become as hot as the • Replace the junction box cover and Higher temperatures increase the surrounding air, regardless of the thermostat setting. access doors after servicing. risk of scalding, but even at 120°F, hot water can scald. If you choose • If the water supplied to the water Lifting Risk a higher temperature, Thermostatic heater is pre-heated (for example, The water heater is Mixing Valves located at each point- by a solar system) the temperature heavy. Follow these of-use are particularly important to in the tank may be higher than the water heater’s thermostat setting. precau ons to help avoid scalding. reduce the risk of property damage, To reduce the risk of unusually hot injuries from li ing or impact injuries Temperature Time to Produce a water reaching the fixtures in the from dropping the water heater. Serious Burn house, install Thermostatic Mixing Valves at each point-of-use. • Use at least two people to lift the 120°F (49°C) More than 5 minutes water heater. 125°F (52°C) 1½ to 2 minutes If anyone in your home is at par cular risk of scalding (for example, the • Be sure you both have a good grip 130°F (54°C) About 30 seconds elderly, children, or people with before lifting. 135°F (57°C) About 10 seconds disabili es) or if there is a local code • Unit is top heavy, use an appliance 140°F (60°C) Less than 5 seconds or state law requiring a certain water dolly (with strap) to move the 145°F (63°C) Less than 3 seconds temperature at the hot water tap, water heater. 150°F (66°C) About 1½ seconds then these precau ons are par cularly important. 155°F (68°C) About 1 second

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 5 IMPORTANT SAFETY INFORMATION

According to a na onal standard • Keep the water heater from Maintain the T&P Relief Valve American Society of Sanitary becoming wet. Immediately properly. Follow the maintenance Engineering (ASSE 1070) and most local shut the water heater off and instructions provided by the plumbing codes, the water heater’s have it inspected by a qualified manufacturer of the T&P Relief Valve thermostat should not be used as person if you find that the wiring, (label attached to T&P Relief Valve) the sole means to regulate water thermostat(s) or surrounding and the procedures provided in the temperature and avoid scalds. insulation have been exposed to

SAFETY Use and Care Guide. Properly adjusted Thermosta c Mixing water in any way (e.g., leaks from Valves installed at each point-of-use plumbing, leaks from the water An explosion could occur if the T&P allow you to set the tank temperature heater itself can damage property Relief Valve or discharge pipe is and could cause a fire risk). If the to a higher se ng without increasing blocked. Do not cap or plug the T&P water heater is subjected to flood risk of scalds. A higher temperature Relief Valve or discharge pipe. se ng allows the tank to provide conditions or the thermostat(s) much more hot water and can help have been submerged in water, Fire and Explosion Risk if Hot Water is provide proper water temperatures the entire water heater must be Not Used for Two Weeks or More replaced. for appliances such as dishwashers CAUTION! Hydrogen gas builds up and washing machines. Higher tank in a hot water system when it is not Explosion Risk temperatures (140°F) also kill bacteria used for a long period (two weeks that cause a condi on known as High temperatures and or more). Hydrogen gas is extremely “smelly water” and can reduce the pressures in the water flammable. If the hot water system levels of bacteria that cause water- heater tank can cause an has not been used for two weeks or borne diseases. explosion resulting in property more, open a hot water faucet for damage, serious injury or death. A several minutes at the kitchen sink Water Contamination Risk new Temperature and Pressure (T&P) before using any electrical appliances Do not use chemicals that could Relief Valve is included with your water connected to the hot water system. contaminate the potable water heater to reduce risk of explosion by Do not smoke or have an open flame supply. Do not use piping that has discharging hot water. Additional or other ignition source near the been treated with chromates, temperature and pressure protective faucet while it is open. seal, or other chemicals. equipment may be required by local Fire Risk codes. To reduce the risk of a A nationally recognized testing fire that could destroy laboratory maintains periodic your home and inspection of the valve production seriously injure or kill people: process and certifies that it meets the • Do not store things that can burn requirements for Relief Valves for Hot easily such as paper or clothes next Water Supply Systems, ANSI Z21.22. to the water heater. The T&P Relief Valve’s relief pressure must not exceed the working pressure • Be sure the junction box cover rating of the water heater as stated on and the access door covers are in place. These covers keep debris the rating plate. from entering and potentially being ignited, and help keep any internal fires from spreading.

6 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook GENERAL SAFETY

Your safety and the safety of others is Tools required for extremely important in the servicing of this water heater. Many safety-related servicing residen al messages and instruc ons have been electric heat pump provided in this handbook and on your water heater to warn you of a poten al water heater models: hazard(s). Read, understand and follow • Digital multimeter (with alligator all instruc ons in this handbook and leads and continuity tester) SAFETY in the Installa on Instruc ons and Use • Clamp style amp meter & Care Guide that shipped with the • Megohm meter water heater. • Water pressure gauge The informa on contained in this • Thermometer (2) handbook is designed to answer • T20 torx bit (for junction box access) common situa ons encountered when opera ng or servicing the residen al • 18” extension, for anode removal (1/2” drive minimum) electric heat pump water heater, it is not meant to be all-inclusive. For topics • 6” extension, for element removal not covered in this handbook, please (1/2” drive minimum) contact the technical informa on • 1-1/16” - 6 point deep well socket center listed on the back cover of for anode removal (1/2” drive this handbook for further assistance. minimum) Addi onal informa on is also available • 1-1/2” - socket for element removal on the website listed on the back cover (1/2” drive minimum) of this handbook. • Ratchet and breaker bar This handbook is intended for use by • Nut drivers: 5/16” & 9/32” (hollow qualifi ed service technicians. shaft) • Non-contact voltage tester The water heater must be returned to a safe condi on any me the water • Common hand tools (screwdrivers, pliers, etc.) heater is le una ended during or a er serviving. All original components • Tape and a permanent marker to must be re-installed and all safety mark the wires measures must be implemented. • Megohm meter Addi onally, the water temperature se ng should be returned to manufacturer’s set point of 120°F.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 7 OPERATION

Water Temperature Efficiency Mode - Electric Mode - Adjustment Provides the highest efficiency and The water heater functions as a lowest cost operation by using only the conventional electric unit by relying The water temperature can be heat pump for heating. Recovery time on only the elements to heat the adjusted from 95°F / 35°C to 140°F and efficiency will vary with ambient water. The heat pump section will not / 60°C (240V model) and 95°F/35°C temperature and relative . operate in this mode. This mode may to 150°F/66°C (208V/240V models). Efficiency will be greatest, and be useful in periods of increased hot Use the Up and Down Bu ons recovery quickest, when both are high. water demand. After 48 hours, the on the front panel to At lower temperatures and relative water heater will revert to the default set the desired temperature (see fi gure humidity levels, efficiency will be lower mode setting. 2 on page 11). The se ng temperature and recovery will take longer. Heat Vacation Mode - will blink on the display, press Mode/ pump operation is allowed between Enter bu on to confi rm. The controller will not allow the OPERATION 45°F / 7.2°C to 120°F / 48.8°C ambient The water temperature can be temperature. At ambient temperatures temperature to drop below 60°F adjusted quickly by pressing the lower than 45°F / 7.2°C and greater while in Vacation setting. This mode is “Temperature Up” bu on and holding than 120°F / 48.8°C, the heat pump recommended when the water heater for three seconds. will not operate. Similarly, if the is not in use for a long period of time, to minimize energy consumption and NOTE: Before a emp ng to adjust the water temperature in the tank is less prevent the water heater from freezing thermostat, read the “Risks During than 59°F / 15°C, the heat pump will during cold conditions. Opera on” sec on on page 6. If the not operate. The unit will operate instruc ons are not clear, contact in electric mode until ambient and CAUTION! Hydrogen gas builds up in Residen al Technical Support. water temperatures return to the safe a hot water system when it is not used operating range of the heat pump. for a long period (two weeks or more). NOTE: For increased water demand, Hybrid Mode - Hydrogen gas is extremely flammable. switching (temporarily) to Hybrid If the hot water system has not been This is the default, recommended Mode or Electric Mode will decrease used for two weeks or more, open a setting, combining high energy the recovery/re-heat me. Be sure to hot water faucet for several minutes efficiency with reduced recovery time. switch back to the desired opera onal at the kitchen sink before using any This mode uses the heat pump as the mode when fi nished. electrical appliances connected to the primary heating source. In this mode, hot water system. Do not smoke or the heat pump section operates the Opera ng Mode have an open flame or other ignition same as if it were in efficiency mode. Descrip ons source near the faucet while it is open. The heating element will also heat The opera ng modes can be changed water in conjunction with the heat either sequen ally by pressing the pump during periods of higher hot Mode/Enter bu on (Figure 1, page water demand so that the set point 10); or, alternately, newer models can temperature can be attained more be changed by pressing and holding quickly. the UP bu on to enter vaca on mode (Figure 2, page 10). The Opera on Mode Indica on Light will turn on when the relevant mode is selected.

8 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook OPERATION

NOTE: When Vacation Mode is Heat pump defrosting indication: selected, the vacation timer will be • There will be frost accumulating displayed. Press the Up and Down on the when the button to modify the timer to desired heat pump is operated in low number of vacation days (setting ambient temperatures. The range: 1 to 99 days). The vacation controller will order the unit timer will blink on the display; press to enter into defrosting cycle the Mode/Enter button to confirm the to optimize the heat pump vacation timer. To deactivate Vacation operation performance. During Mode, press the Mode/Enter button the defrosting period, the user to switch to the desired mode. interface module will display “ICE” as an indication.

Other Controls Out of heat pump operation range: OPERATION °F/°C Switch - Press “Temperature • The user interface module will Down” button and hold for 3 seconds display “HPO” as an indication to switch temperature unit between that the ambient and/or water Farenheit and Celsius temperature condition is out of Power Saver Enable/Disable: the heat pump operation range. • Press “Mode/Enter” button and NOTE: The display will go into “Sleep hold for 3 seconds. The power Mode” for energy saving if there is saver, or remote access feature no operation on any button for 15 will be activated and the display minutes. All the display and lights will show either “P.S.” (not to will be turned off. During this time be mistaken with P5) or “R.A.”, the heater will operate in the electric and the setting temperature mode to heat water until ambient alternatively. This feature allows or water temperature conditions are the unit to be managed by again inside the operating envelope, grid or other utility based load (The “Operating Mode” indicator light management programs. may remain illuminated for some • To deactivate the power saver models while in sleep mode). The or remote access, press “Mode/ display can be awakened by pressing Enter” button and hold for 3 any button. seconds.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 9 NAVIGATING OR USING THE UIM

Temperature Unit Indication Light

Temperature Up °F (Increase) Button Display Segment °C

DAYS Temperature Down (Decrease) Button

Operational Mode Mode/Enter Indication Light Button BASICS

Vacation Time Indication

Figure 1 - UIM Display (208V/240V) Figure 2 - UIM Display (240V & early release 208V/240V)

Accessing the Maintenance Display:

OPERATION 1. Press the Up and Down buttons at the same time and hold for (3) seconds. The display will enter the Maintenance Display Mode. The display will alternate between the display designation (EX:P1) and the associated information. 2. A total of 13 options are available in this mode (see Table below). Use the Up and Down Temperature buttons to switch between each option. 3. The display will revert to normal operation after no buttons have been pressed over a period of approximately (5) seconds. NOTE: When powered on, the unit will perform a system self-diagnostic. This typically takes (8) eight minutes (The user interface module will display scrolling dashes repetitively during self-diagnostic). When the self-diagnostic is complete the display will begin normal operation. If the system diagnostic discovers any issues, a diagnostic code will be displayed. A complete list of diagnostic codes can be found in the Diagnostic Codes section of this manual.

Table 1: Maintenance Display Display Message Meaning 1 P1 Upper Tank Temperature Measured at outer upper tank wall 2 P2 Lower Tank Temperature Measured at outer lower tank wall 3 P3 Coil Temperature Measured at hairpin of evaporator 4 P4 Discharge Temperature Measured at compressor discharge pipe 5 P5 Suction Temperature Measured at evaporator outlet pipe 6 P6 EEV Pulses EEV (Electronic Expansion Valve) opening indication 7 P7 Upper Element Status 0: Upper element is off 1: Upper element is on 8 P8 Lower Element Status 0: Lower element is off 1: Lower element is on 9 P9 Software Version “vXY” means the software version is “X.Y” 10 H1 History Fault 1 Code Newest active fault code 11 H2 History Fault 2 Code Historical fault 12 H3 History Fault 3 Code Historical fault 13 H4 History Fault 4 Code Historical fault

10 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook NEW INSTALLATIONS

WARNING! Do not cap or plug the Adjust the set point Thermal Expansion Tank: Install a T&P relief valve or discharge pipe, and 5 temperature. See the “Water Thermal Expansion Tank. If a Thermal do not operate the water heater Temperature Adjustment” Expansion Tank is already installed and without a functioning T&P relief valve sec on on page 8. the T&P Relief Valve discharge pipe - this could cause an explosion. drips, the Thermal Expansion Tank may IMPORTANT: Do not a empt to be pressurized to the wrong pressure or Before Using: operate this water heater if the unit has the internal bladder may be defec ve. been submerged, subjected to fl ooding, Refer to the instruc ons that came with BASICS Make sure the water heater or surrounding insula on has been the Thermal Expansion Tank for more 1 has been properly installed, exposed to water in any way. informa on, see “Checking the Air according to the Installa on Charge of the Thermal Expansion Tank” Do not a empt to repair a unit that and Use and Care Guide. sec on, page 13. has been subjected to fl ood condi ons. Make sure the air fi lter is Water heaters that have been subjected Debris: In rare cases debris can s ck 2 correctly seated, as it may shi to fl ood condi ons or any me the unit inside the T&P Relief Valve preven ng during shipping or installa on. has been submerged in water must be the valve from sea ng fully. In that NOTE: The top of the unit must be kept replaced. case, the T&P Relief Valve discharge clear to provide air into the water pipe will drip.You may be able to clear heater. Verify nothing is blocking the Drips from Temperature debris from the T&P Relief Valve by inlet or exhaust air fl ow (See “Repair and Pressure (T&P) manually opera ng the valve, allowing Parts Illustra on” page 26). small quan es of water to fl ush out Relief Valve Discharge the debris. See the label on the T&P Make certain the tank is Pipe: Relief Valve for instruc ons. 3 completely fi lled with water, (see Use & Care Guide). A small amount of water dripping from If the water pressure is between 50 the Temperature and Pressure (T&P) and 60 psi, a Thermal Expansion Tank A er the water heater is Relief Valve usually means the home’s is installed and properly pressurized, 4 completely fi lled with water, TROUBLESHOOTING water pressure is too high or you and the valve has been cleared of any connect electrical power to the need a properly sized and pressurized debris, and it s ll drips, the valve may water heater. Thermal Expansion Tank. Refer to the be broken. The T&P Relief Valve needs NOTE: When powered on, the unit installa on instruc ons in the Use to be replaced. will perform a system self-diagnostic. and Care Guide and “Checking the Air This typically takes (8) eight minutes Charge of the Thermal Expansion Tank” (The user interface module will sec on of this manual, page 13. A large display scrolling dashes repetitively amount of hot water coming from the during self-diagnostic). When the T&P discharge pipe may be due to the self-diagnostic is complete the display tank overhea ng. will begin normal operation. If the system diagnostic discovers any issues, Water pressure too high: Water a diagnostic code will be displayed. pressure can cause the T&P Relief Valve A complete list of diagnostic codes to drip. Install a Pressure Reducing can be found in the Diagnostic Codes Valve (PRV) on the main cold water section of this manual. supply line. Adjust the PRV to between 50 and 60 psi.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 11 NEW INSTALLATION TROUBLESHOOTING Post Installa on Review Closed System/Thermal Understand how to use the Expansion/T&P Drip: 1 User Interface Module (UIM) Most public water systems are to set the various modes and required to prevent water fl owing from func ons. points of use (residences, businesses, Hybrid Mode is the etc.) back into the municiple water 2 recommended Opera ng BASICS supply. This creates what is known as a Mode. Review the various “Closed System”. Opera ng Modes and which mode may be best, based on ambient As water is heated, it expands. In a temperature and hot water demands. closed system the expansion of the water has nowhere to go, resul ng Understand the importance of 3 in an increase in pressure. This rou ne inspec on/ increased pressure in the system can maintenance of the damage the water heater and may condensate drain pan and lines. This is cause the T&P relief valve to open to prevent any possible drain line and relieve the pressure. Premature blockage resul ng in the condensate tank failure will result if this condi on drain pan overfl owing. is not corrected. To prevent thermal NOTE: If water is coming from the expansion from increasing the system overfl ow slot of the condensate drain pressure, a properly sized thermal access cover, this indicates that both expansion tank should be installed condensate drain lines may be blocked on the cold water supply to the water and immediate ac on is required. heater (see example in the “Completed

Drain Access Cover Installa on” fi gure on page 3) The thermal expansion tank must be charged with air to match the incoming Secondary Drain water pressure. Failure to install a Primary Drain properly sized thermal expansion

TROUBLESHOOTING Overflow Slot tank in a closed system will void the warranty on the water heater in the event of tank failure. Always follow the Figure 3 - Condensate Drain Access manufacturer’s instruc ons that come Cover with the expansion tank. To maintain op mal 4 opera on, check, and clean Contact a plumbing service agency the air fi lter as needed (see or your retail supplier regarding the “Air Filter Maintenance” sec on on installa on of a thermal expansion page 21). tank. The Installa on Instruc ons 5 and Use and Care Guide should be kept with the water heater for reference.

12 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook NEW INSTALLATION TROUBLESHOOTING

Checking and Adjus ng Remove the cap from the air Again, turn off water heater’s 7 pressure Schrader valve and 4 circuit breaker, or remove the Air Charge of the use the air pressure gauge to disconnect and replace Thermal Expansion measure the air pressure charge of the electrical junc on box cover, before expansion tank. The air pressure performing maintenance work. Tank: charge should match the recorded NOTE: When powered on the unit Turn off power to the water incoming water pressure. BASICS will start to run a system diagnostic. 1 heater at the circuit breaker NOTE: If water, rather than air, comes This typically takes eight (8) minutes or remove disconnects. out of the Schrader valve the and the UIM will display ------expansion tank will need to be repetitively during this period. Run cold water out of the tap replaced. 2 for 10 seconds to relieve thermal expansion and then If the air charge does not turn off the faucet. 8 match the incoming water pressure, adjust it by adding Connect a water pressure 3 pressure with an air compressor or by gauge to the plumbing system relieving excess pressure at the and record the incoming Schrader valve un l the air charge in water pressure. the tank matches the pressure of the Shut off the cold water supply. incoming water. 4 Re-install the thermal 9 expansion tank. Open a hot water tap and 5 Open all plumbing shut-off relieve the pressure from the 10 plumbing system. valves and turn on power to the water heater. TROUBLESHOOTING The preferred method for 6 Check for leaks. checking air pressure of a 11 thermal expansion tank is to remove it from the plumbing if possible. Where it is not possible to Power Cycling the Unit: remove the thermal expansion tank, Find and turn off the water take necessary precau ons to insure 1 heater’s circuit breaker or water pressure at the plumbing remove disconnects. connec on to the expansion tank has Find electrical junc on box on been relieved. Failure to relieve water 2 side of water heater, remove pressure at this loca on may invalidate cover and iden fy the two (2) the air pressure check. Improperly power wires. installed or charged thermal expansion tanks can result in premature leaking Turn circuit breaker back on of the water heater. 3 (or re-install the disconnects) NOTE: The air pressure check is not and check for power on both valid unless the thermal expansion incoming power wires using a tank is completely removed from the voltmeter. system.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 13 DIAGNOSTIC CODES

DISPLAY SHOWS INDICATES CORRECTIVE ACTION

(scrolling dashes) Unit is running system diagnostic. ICE Heat pump is in defrost cycle. Normal operation--no action HPO Ambient temperature <45°F

BASICS or >120°F, average tank temperature of 59°F or less. EUC Upper element is not Refer to “Element Testing and Replacment” page 18. * functioning

ELC Lower element is not Refer to “Element Testing and Replacement” page 18 functioning SF The air filter is dirty. Refer to “Air Filter Maintenance” page 21

ECF The heat pump compressor is 1. If compressor is running and fan is not operating, refer to * starting/stopping frequently. “Fan Check Flow Chart” page 24. 2. Clean the air filter. See “Air Filter Maintenance” section on page 21. 3. Check installation location against recommended confined space requirements, refer to Use & Care Guide. E20 or E21 Upper Temperature Sensor is * not functioning. E30 or E31 Lower Temperature Sensor is not functioning. E50 or E51 Heat Pump Suction Temperature Power off (Power Cycling the unit, page 13), disconnect Sensor is not functioning. and reconnect J2 and J5 connections from control board E10 or E11 Heat Pump Coil Temperature Appendix pages 25-26 (for control board photos), inspect Sensor is not functioning. wire for damage, re-install UIM, reconnect power. If error persists, replace temperature sensor. E40 or E41 Heat Pump Discharge Temperature Sensor is not functioning. E60 Upper and Lower Temperature TROUBLESHOOTING * Sensor are not functioning Edr Not enough water in the tank Open all hot water taps in home and run until water flows, * (tank not full). uninterrupted (full stream for three minutes), from all open hot water taps. EPL Power supply voltage is too low. Check for loose electrical connections, refer to “Power Cycling the Unit”, page 13.

NOTE: The diagnostic code listed above are the most common. If a diagnostic code not listed above is displayed, contact Technical Support referencing the number on the front of this manual.

* There may be an audible alarm associated with this error. To cancel the alarm, press any button on the UIM.

14 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook DIAGNOSTIC CODES

EDH Compressor Discharge Call Technical Support * Temperature is too high. EoF Condensate management. 1. Check to see if accessory is plugged in * and has power. Also check circuit breaker/fuse box and GFCI (if used). If error persists, proceed to the next step. 2. Check condensate pump outlet tube for blockage. If error persists, proceed to the next step. 3. Check for water in the condensation pan, ensure unit is installed level, check for blocked drain lines. 4. Check control wire connections to condensate pump. If BASICS error persists, proceed to the next step. (See Use & Care Guide for connecting the condensate pump) 5. Replace accessory condensate pump. ECL Heat pump suction pressure is Confirm physical connection of temperature sensor to the * too low. suction line. EEE EEPROM failure Power cycle unit. If error persists, replace control board. ECC Heat pump compressor is not * functioning See Compressor Check flowchart on pages 22 and 23. ECE Power supply error. Call Technical Support.

NOTE: The diagnostic code listed above are the most common. If a diagnostic code not listed above is displayed, contact Technical Support referencing the number on the front of this manual.

* There may be an audible alarm associated with this error. To cancel the audible alarm, press any bu on on the UIM. TROUBLESHOOTING

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 15 TROUBLESHOOTING CHART

PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION NO DISPLAY 1. Sleep Mode 1. Touch any button to wake up UIM 2. No power to the water heater (No 2. Check for blown fuse or tripped breaker. lights on the unit are on). Restore power to unit. NO HOT WATER 1. No power to the water heater (No 1. Check for blown fuse or tripped breaker. lights on the unit are on). Restore power to unit. 2. Unit in Vacation mode 2. Press Mode/Enter button and return to desired operating mode (page 9-10). 3. ECO tripped 3. Reset the Energy Cut Off (ECO) switch; see BASICS “Check/Reset Energy Cut Off” section for more information (page 19). 4. Hot water usage pattern exceeds the 4. Change to different mode or modify usage capability of the water heater in cur- patterns (pages 8-9). rent mode 5. Non-functioning upper temperature 5. Refer to “Diagnostic Codes” section (pages sensor 14-15). 6. Faulty thermostatic mixing valve. 6. Check hot water at other faucets. 7. Leak in plumbing system 7. Check hot water side of home’s plumbing system for leaks. INSUFFICIENT HOT WATER/ 1. Temperature set-point too low 1. Increase set point temperature; see “Water SLOW HOT WATER RECOVERY Temperature Adjustment” section (page 8). 2. Air filter dirty 2. Clean air filter (page 21). 3. Hot water leak at faucet or piping 3. Repair hot water leaks. 4. Non-functioning heating element 4. Refer to “Diagnostic Codes” section (pages 14-15). 5. Hot water usage pattern exceeds the 5. Change to different mode or modify usage capability of the water heater in cur- patterns (For example if in Efficiency Mode rent mode switch to Hybrid Mode, pages 14-15). 6. Water connections to unit reversed 6. Ensure the cold connection is at the bottom and that the hot connection is at the top. 7. Out of position outlet j-tube. 7. Check orientation of alignment mark with arrow, re-install if necessary. 8. Thermostatic mixing valve faulty/set 8. Check hot water at other faucets. too low. TEMPERATURE TOO HIGH 1. Water temperature set point too 1. Adjust UIM. high. 2. Grounded/shorted heating element. 2. Replace heating element (see “Element Testing and Replacement”, page 18). TROUBLESHOOTING 3. Thermostatic mixing valve faulty/set 3. Adjust temperature setting of thermostatic too high. mixing valve. LOW WATER PRESSURE 1. Partially closed supply valve 1. Open supply valve completely.

WATER ODOR 1. A sulfate reducing bacteria which has 1. Install thermostatic mixing valve, increase accumulated within the water heater water temperature set point to 140°F (this harmless bacteria is nontoxic to humans). SOUNDS 1. Normal expansion and contraction of 1. No action required. metal parts during periods of heat-up and cool-down. 2. Sediment buildup on or around the 2. Replace element (see “Element Testing and elements. Replacement”, page 18). 3. The heat pump compressor or fan 3. No action required. running.

16 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook TROUBLESHOOTING CHART

PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION DRIP FROM TEMPERATURE & 1. Excessive water pressure 1. Check water supply inlet pressure. If higher PRESSURE RELIEF VALVE than 80 PSIG, install a pressure reducing valve. 50-60 PSIG is the recommended pres- sure. 2. Add or service a thermal expansion 2. See “New Installation Troubleshooting” sec- tank. tion (page 11-12).

3. Debris under valve seat. 3. See “Drips from T&P Relief Valve Discharge BASICS Pipe” section (page 11). TROUBLESHOOTING

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 17 ELEMENT TESTING AND REPLACEMENT

Te s ng the Element Replacing the Hea ng Element With power to the water 1 heater OFF, remove the upper WARNING! Working on an energized element access panel, circuit can result in severe injury or insula on and plas c cover. death from electrical shock. Turn power off. Check wires with a non- Loosen the two (2) screws on contact circuit tester to make sure 2 the upper hea ng element and Figure 6 - Water Faucet power is off. When you are finished, remove both power wires. WARNING! Be sure the water runs be sure all covers are secured to cool before draining the tank to reduce Set mul meter to Ohms and reduce the risk of fire and electric the risk of scalding. 3 measure resistance between shock. the two upper hea ng element Connect a garden hose to the screws (reading should be between 5 Steps for Replacing the 4 drain valve and place the other and 25 Ohms). end of the hose in a drain or

Heating Element: outside (or use buckets). Turn OFF the If the resistance reading is Turn the power to the water cold water valve that supplies the water 4 either below 5 Ohms or above heater. Open the drain valve on the 1 heater OFF. 25 Ohms, replace upper water heater. Opening a hot water faucet element. If the element’s resistance is will help the tank drain faster. good, proceed to next step. Remove the upper or lower Check for a grounded or 5 access panel on the water 5 shorted element using heater, and then fold back the con nuity or resistance as Figure 4 - Circuit Breaker insula on and remove the plas c follows: Open the electrical junc on element/thermostat cover. A. Place a test probe on one of the 2 box on the side of the water element terminals and the other test heater. Using a non-contact circuit tester, check the power wires to

MAINTENANCE probe on the element fl ange or tank shell. Ensure a good connec on. make certain the power is OFF.

B. If either test shows con nuity, the element is grounded and should be replaced. Figure 7 - Access Panel If either test shows less than infi nite With the tank drained and resistance or con nuity, the element is 6 power off , remove the power grounded and should be replaced. wires from the element you intend to replace. Replace the elements as required. Remove the bad element using 7 an element wrench.

Figure 5 - Non-Contact Circuit Tester Open a hot water faucet and 3 let the hot water run un l it is cool.

18 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook ELEMENT TESTING AND REPLACEMENT Make sure the new element is Once the element is Replacing the ECO 8 the correct replacement by 12 successfully installed and there referring to the water heater’s are no leaks, replace the WARNING! Working on an energized data plate for voltage and wa age power wires, thermostat cover, circuit can result in severe injury or informa on. insula on, and access panel. Make sure death from electrical shock. Turn all wire connec ons are ght. Replace power OFF. Check wires with a non- Clean the threads in the tank 9 the cover on the electrical junc on box. contact circuit tester to make sure opening with a rag. Insert the power is OFF. When you are finished, new element equipped with a Restore power to the water be sure all covers are secured to rubber gasket. NOTE: Use a drop of 13 heater. It may take two hours reduce the risk of fire and electric hand dishwashing liquid to lubricate the for the tank to heat up. shock. gasket to help avoid damaging the gasket as it is being ghtened. Tighten Check/Reset Energy Cut To replace the ECO, you’ll need the with an element wrench. following tools and supplies: Off Bu on NOTICE: Do not turn power back on un l • A non-contact circuit tester. Always The Energy Cut Off (ECO) shuts off the tank is completely full of water. turn power OFF power to the water heater’s elements and check with a non-contact circuit Refi ll the tank by opening the if the temperature of the water in tester before working on the water 10 cold water supply valve. Make the tank gets too hot. If the ECO has heater. sure a hot water faucet is open tripped, you’ll have no hot water. and the drain valve is closed. Allow the A tripped ECO can usually be reset. hot water to run full for at least three Inves gate the cause of the overhea ng minutes to make sure the tank has all and repair the problem. Do not turn the the air removed and is completely full power back on un l the cause of the of water. Once you are certain the tank overhea ng has been iden fi ed and is completely full of water, close the hot repaired. water faucet. To check the Energy Cut Off (ECO)

• Turn off power to the water heater. MAINTENANCE • Press the red ECO reset bu on See Figure 9 - ECO fi gure 9, this page). • A business card to check the gap between the ECO and tank. Figure 8 - Drain Valve • The ECO was tripped if you hear a click when it is reset. In most cases Check the newly installed • Tape and a permanent marker to a tripped ECO indicates that the 11 element for leaks. If a leak is mark the wires tank overheated due to a problem present, ghten the element with one of the elements. Check • A flat blade and a Phillips screwdriver un l the leak stops. If you cannot stop the upper and lower elements and the leak by ghtening the element, replace if necessary (see page 18). Follow these steps: drain the tank and remove the element. Inspect the gasket for damage. If the • The ECO was not tripped if Turn the power OFF at the gasket is damaged, replace the gasket you didn’t hear a click. In that 1 circuit breaker or remove fuses. and re-install the element. case, verify power to the upper NOTICE: It is not necessary to drain the terminals. If there is no power, tank to replace an ECO. refer back to the troubleshoo ng sec on, “no power”. If there is power, check power to the lower terminals of the ECO. If there is no power to the lower terminals, replace the ECO.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 19 ELEMENT TESTING AND REPLACEMENT

Open the electrical junc on box Make sure the new ECO fi ts • At least annually, operate the 2 the side of the water heater. 8 snuggly against the tank. If the T&P Relief Valve manually to Using a non-contact circuit tester, new ECO does not fi t snuggly ensure the waterways are clear check the power wires to make certain the against the tank, bend the ECO and the valve mechanism moves power is OFF. moun ng clip un l the ECO fi ts ghtly freely (above). Before opera ng

Junction Box Green Ground Screw against the tank. the valve manually, check that it will discharge in a place for 1/2” Conduit A ach the wires per previous Green Opening secure disposal. If water does not Ground 9 marking (step 5) or by Wire fl ow freely from the end of the Power Supply referencing wiring diagram on Black Wire Connector discharge pipe, turn OFF the power the water heater’s label. Make sure all to the water heater. Call a qualifi ed Red Wire wire connec ons are ght. person to determine the cause.

Replace the plas c element/ WARNING! Hot water will be Figure 10 - Non-Contact Circuit Tester 10 ECO cover, insula on, and released. Before operating the T&P access panel. relief valve manually, check that it Power Supply will discharge in a safe place. If water Connector Replace the cover on the does not flow freely from the end of 1/2” Conduit 11 electrical junc on box. Opening the discharge pipe, turn the power to Restore power to the water the water heater OFF. Call a qualified Green Ground 12 heater. It may take two hours person to determine the cause. Screw for the tank to heat up.

Green Ground Wire

Red Wire Black Wire

Figure 11 - 208V NEEA Junction Box

MAINTENANCE Remove the upper access 3 panel on the water heater and carefully fold back the Figure 12 - Element Access Panel/ECO Compart- insula on and plas c element/ECO ment Figure 13 - T&P Relief Valve cover (See fi gure 12, this page). • At least every fi ve years, a qualifi ed T&P Relief Valve person should inspect the T&P Make sure the replacement Relief Valve and discharge pipe. 4 ECO matches the original ECO. Maintenance Read and follow the opera ng and • Damage caused by corrosive water Mark the wires with tape so annual maintenance instruc ons condi ons, mineral deposits, 5 you’ll know how to put them provided by the manufacturer of the or other problems can only be back on. T&P Relief Valve (yellow label a ached determined when a qualifi ed to T&P Relief Valve). Minerals in the Disconnect the wires from the person removes and inspects the water can form deposits that cause 6 bad ECO and remove the ECO valve and its components. the valve to s ck or create blocked from the metal moun ng clip. passages, making the T&P Relief Valve Install the new ECO in the inopera ve. Follow these guidelines: 7 metal moun ng clip.

20 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook REPLACING THE ANODE

• Note that a dripping T&P Relief Changing the Anode: Replace the top (don’t forget Valve is usually caused by the 8 the top two screws), refi ll with home’s water pressure being Turn power OFF to the unit (at water and re-establish power. too high or the lack of a Thermal 1 the breaker/fuse panel). Expansion Tank. If your T&P Relief Valve drips refer to “Drips from Open a hot water faucet and T&P Relief Valve Discharge Pipe” 2 let the hot water run un l it’s sec on on page 11. cool. Air Filter Maintenance Connect a garden hose to the 3 drain valve and place the To maintain op mal opera on, check other end of the hose in a and clean the air fi lter as needed. The drain, outside or in buckets. heater will monitor the heat pump opera on status and indicate whether Turn the cold water supply the fi lter should be cleaned. If the 4 valve OFF and open the drain User Interface Module displays “SF” valve on the water heater. Figure 14 - Anode rods from new to (top) to code, this indicates the fi lter should be partially depleted (middle) to fully depleted Open a hot water faucet to cleaned or replaced with the following stages (bottom). 5 help the water in the tank process (See exploded view of unit on Back of Unit drain faster. last page for air fi lter loca on). Remove the two screws from NOTE: Before a emp ng to clean or 36” for 50 and 66 gallon 6 the top of the unit as well as 42” for 80 gallon replace the air fi lter, turn OFF power to all screws securing it to the the water heater. Anode shroud.

Anode To clean the fi lter, leave the Using a 1 - 1/16” six point 1 fi lter in place and use a 7 deep well socket and an 18” 14” for 66 and 80 gallon (50 gallon models have vacuum with a hose extension, locate and remove only one anode) T&P Valve MAINTENANCE a achment to remove any dust or the anode. Replace with new one. UIM debris. If vacuuming does not remove NOTE: 66 and 80 gallon models have Front of Unit all debris, remove the fi lter and clean two anodes (fi gure 14) Figure 15 - Anode locations with hand dishwashing soap and water or replace the fi lter.

To remove or replace air fi lter:

Take the two tabs on the air 2 fi lter and remove (slide) it from the top cover of the unit.

Clean and reinstall or replace 3 fi lter.

Restore power to the water 4 heater and turn the water heater on. NOTE: The water heater may conduct a system diagnos c prior to opera on.

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 21 COMPRESSOR CHECK FLOWCHART

Compressor Fault (ECC)

CAUTION! Do not stand Disconnect power in front of compressor to the water terminals when checking heater windings or electrical connections. Terminals can Check Allow compressor in some cases can dislodge Compressor shell BASICS compressor shell to cool and is hot and eject under pressure temperature internal thermal switch to reset

Compressor shell is cool

Turn power to the water heater back on and Clean fi lter and/or increase set point evaporator coil if 10° higher than needed tank temperature. Wait for the unit to run a self diagnostic (around 8 minutes)

Refer to Fan No Verify fan Check Flowchart comes on

Yes

Compressor does not No Verify the Yes Compressor starts and Next page come on (ECC Error compressor runs (ECC error does returns) comes on not return)

Verify No voltage 240V Compressor buzzes when fan (FHPT/SHPT) loudly and makes a pop comes on 208V/240V (HPTU) sound (LRA, opening after self between L2 (black wire) thermal overload) diagnostic at pin 2 of CN1 and pin1 at CN3

Replace Check fi eld control 240V (FHPT/SHPT) high voltage

SYSTEM CHECKS SYSTEM connections board 208V/240V (HPTU) All electrical Next page for tightness. Check present when fan connections secure connection at CN3 of comes on after self and not damaged control board for diagnostic damaged or loose connections.

22 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook COMPRESSOR CHECK FLOWCHART

CAUTION! Do not stand in front of compressor Compressor runs a very terminals when checking Continue here short time and Extended run windings or electrical shuts off or runs for an (Greater than 5 connections. Terminals extended amount of minutes) time before shutting can in some case dislodge off (5 minutes and eject under pressure or more) BASICS

Check connections at Short run time control board, if error persists, contact Tech Support

Check the capacitor. (Capacitors can Continue here store a residual electrical charge. Take care not to touch Capacitor is outside of the capacitor leads/terminals correct range listed on to prevent risk of shock. capacitor Discharge the capacitor before testing. Replace capacitor

Check electrical connections Capacitor is in at the compressor No continuity between correct range listed terminals. Verify continuity or more terminals on capacitor between all three compressor terminals

If there is an internal thermal overload, it may need time to reset. If internal overload is not present or does not reset, then replace compressor.

240V models only (FHPT/SHPT) Measure Megohm between each Megohm readings Replace the terminal and are < 100 Megohm compressor SYSTEM CHECKS SYSTEM ground.

Megohm readings are > 100 Megohm

Replace the starting relay

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 23 FAN CHECK FLOW CHART WITH CODE

Fan is not operating but compressor is on

Power off; Remove UIM; Disconnect CN2; BASICS Power on, wait 8 min for diagnostic to complete

Check voltage at control board No Replace connector CN2 control board * between pins 1 and 3 (see Note)

Yes

Reconnect

No Replace fan Fan runs motor

SYSTEM CHECKS SYSTEM NOTE: For FHPT and SHPT models, voltage is 240V. For HPTU voltage is either 208V or 240V. Refer to “Power Cycling the Unit”, page 13.

*If replacing the control board does not resolve the issue, contact technical support.

24 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook CONTROL BOARD OVERVIEW

A B Section “A”

Terminal 2 D

K1 BASICS C

Figure 15: Front side of control board w/buzzer Terminal 3 A B Terminal 1 K2

F1 4 C CN3 3 Figure 16: Front side of control board 2

1

1 2 3 E CN1 12 CN2

Figure 18: Section A

D

Figure 17: Back side of control board

SECTION A F1: CN1 Line Power: • F1 (1.25 Amp, 250V. slow blow) fuses the L1 • Pin 1 - Control board power wire L1 (240Vac) power leg coming to the control board • Pin 2 - Control board power wire L2 (240Vac) K1 Upper Element Relay: CN2 Fan: • Terminal 1 - Connects to L1 with ECO • Pin 1 - Fan power L2 • Terminal 2 - Connects to upper heating element • Pin 2 - Unused K2 Lower Element Relay: • Pin 3 - Fan power L1 • Terminal 1 - Connects to L1 with ECO CN3 Compressor: • Terminal 3 - Connects to lower heating element

• Pin 1 - Connects to L1 with ECO APPENDIX • Pin 2 - Unused • Pin 3 - Unused • Pin 4 - Connects to Compressor power L1

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 25 CONTROL BOARD OVERVIEW

Section “C” Section “D” Section “B”

J5 UP

J7 J4 BASICS

DOWN J2 J6

MODE

Figure 20 Section “C” Figure 21 Section “D” Figure 19 Section “B” SECTION B SECTION C J7 Upper and Lower tank water temperature J4 Condensate Water Connection: sensors: • Pin 1 - Condensate water alarm • Pin 1 - Upper water temperature sensor on tank. • Pin 2 - Condensate water alarm • Pin 2 - Upper water temperature sensor on tank. J6 EEV 9Electronic Expansion Valve): • Pin 3 - Lower water temperature sensor on tank. • Pin 1 - Connected to CH4 of EEV • Pin 4 - Lower water temperature sensor on tank. • Pin 2 - Connected to CH3 of EEV J2 Temperature Sensors: • Pin 3 - Connected to CH2 of EEV • Pin 1 - Coil Temperature sensor. • Pin 4 - Connected to CH1 of EEV • Pin 2 - Coil temperature sensor. • Pin 3 - Suction temperature sensor. • Pin 4 - Suction temperature sensor. • Pin 5 - Discharge temperature sensor. • Pin 6 - Discharge temperature sensor. J5 Communication: • Pin 1 - Unused • Pin 2 - Unused • Pin 3 - +5V • Pin 4 - +12V

APPENDIX • Pin 5 - Signal A+ • Pin 6 - Signal B+ • Pin 7 - Ground

26 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook WIRE DIAGRAMS

NEEA Wire Diagram:

RED ',6&+$5*(7(036(1625 BASICS WHITE 68&7,217(036(1625 BLACK &2,/7(036(1625 RED A-A TANK LOWER TEMP. SENSOR B-B TANK UPPER TEMP. SENSOR BLACK

RS 485 J5 BLACK J7 CONDENSATE WATER LEVEL SWITCH J4

J2 &21'(16$7(:$7(5 *5,'60$57 $/$506,*1$/ a

RED

EEV EEV

J6

GREEN

BLUE UPPER

K1 RED

LOWER WHITE K2 CN3 RED

COMPRESSOR RED

FAN CN1 CN2 REDRED & GREEN L1 L2 L2 L1

BLACK 02725 R S BROWN L1 3527(&725

BLUE L2 &2035(6625 RED WHITE BLACK GREEN BLACK BLACK &$3$&,725 TANK G JACKET GREEN

%/2:(5 GREEN

BLACK BLACK

TANK TOP 1 3 COVER RED BLACK 2 4 HIGH LIMIT %% SWITCH TANK UPPER RED BLACK TEMPERATURE SENSOR BLACK BLUE

UPPER ELEMENT 4.5 KW

-81&7,21 L1 L2 G $$ %2; TANK LOWER TEMPERATURE SENSOR

WHITE

/2:(5(/(0(17 240VAC 60Hz 1Φ TANK .: 208VAC 60Hz 1Φ

FIELD WIRING FACTORY WIRING

a OPTIONAL OVERFLOW SWITCH 100270379 NORMALLY CLOSED APPENDIX

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 27 WIRE DIAGRAMS 208/240 Volt Wire Diagram:

RED ',6&+$5*(7(036(1625 WHITE 68&7,217(036(1625 BLACK

BASICS &2,/7(036(1625 RED A-A TANK LOWER TEMP. SENSOR B-B TANK UPPER TEMP. SENSOR BLACK

RS 485 J5 BLACK J7

J4 WHITE

J2 &21'(16$7(:$7(5 *5,'60$57 $/$506,*1$/ a

RED

EEV EEV

J6

GREEN

BLUE UPPER

K1 RED

LOWER WHITE K2 CN3 RED

COMPRESSOR RED

FAN CN1 CN2 REDRED & GREEN L1 L2 L2 L1

BLACK 02725 R S BROWN L1 3527(&725

BLUE L2 &2035(6625 RED WHITE BLACK GREEN BLACK BLACK &$3$&,725 TANK G JACKET GREEN

%/2:(5 GREEN

BLACK BLACK

TANK TOP 1 3 COVER RED BLACK 2 4 HIGH LIMIT %% SWITCH TANK UPPER RED BLACK TEMPERATURE SENSOR BLACK BLUE

UPPER ELEMENT 4.5 KW

-81&7,21 L1 L2 G $$ %2; TANK LOWER TEMPERATURE SENSOR

WHITE

/2:(5(/(0(17 240VAC 60Hz 1Φ TANK .: 208VAC 60Hz 1Φ

FIELD WIRING FACTORY WIRING

a OPTIONAL OVERFLOW SWITCH 100265281 NORMALLY CLOSED APPENDIX

28 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook WIRE DIAGRAMS

240V Wire Diagram:

RED DISCHARGE TEMP. SENSOR WHITE SUCTION TEMP. SENSOR BLACK COIL TEMP. SENSOR BLACK

A-A TANK LOWER TEMP. SENSOR BASICS B-B TANK UPPER TEMP. SENSOR BLACK

RS 485 J5 BLACK J7

J4 WHITE GRID SMART CONDENSATE a J2 WATER ALARM SIGNAL

RED

EEV EEV

J6 GREEN

BLUE UPPER

K1 RED

LOWER WHITE K2 CN3 RED

COMPRESSOR RED

FAN CN2 CN1 BLACK 11 L1 L2 L2 L1 10

BLACK BROWN L1 13 12 BLUE RED L2 14 COMPRESSOR CAPACITOR BLACK G GREEN TANK JACKET BLOWER GREEN

BLACK BLACK TANK TOP COVER 1 3 RED BLACK 2 4 HIGH LIMIT B-B SWITCH TANK UPPER TEMPERATURE SENSOR RED BLACK BLACK BLUE

UPPER ELEMENT 4.5 KW JUNCTION BOX A-A L1 L2 G TANK LOWER TEMPERATURE SENSOR

WHITE

LOWER ELEMENT TANK 4.5 KW 240VAC 60Hz 1Ø FIELD WIRING FACTORY WIRING a OPTIONAL OVERFLOW SWITCH NORMALLY CLOSED 325961-000 REV 02 APPENDIX

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 29 REPAIR PARTS ILLUSTRATION

ITEM 6 PARTS DESCRIPTION PART NUMBER 22 NO. 23 1 Personnel Protector 100109599 2 Element (4500 Wa s) 100108283 21 12 3 Energy Cut-Off (ECO) Switch 100112568 4 Temperature & Pressure Relief Valve 100108455

BASICS 18 (T&P) 7 14 14 5 J-Tube (at hot water outlet) 11.25” 100113131 17 for 50 gallon 13 5 J-Tube (at hot water outlet) 14.25” 100228155 15 for 66 and 80 gallon 9 3 6 Air Filter 100113133 5 4 16 7 Fan Assembly 100113134 2 8 Drain Valve - Brass - 2 inch 100108666 1 2 9 Personnel Protector 100148769 16 10 Ambient / Coil / Discharge 100113135 Temperature Sensor Assembly* 8 11 Upper / Lower Tank Temperature 100113136 Sensor Assembly* REPAIR PARTS 12 Electronic Expansion Valve Coil 100113137 Repair parts may be ordered through your plumber, local distributor, home improvement center, or by calling 13 Condensate Drain Pan 100084119 1-800-527-1953. When ordering repair parts always give 14 Smart Grid Cover 100075293 the following informa on: 15 UIM Front Cover Assembly 100263335 1. Model, serial and product number (No control board) 2. Item number 16 Element Access Panel 100109599 3. Parts descrip on 17 Anode (36” for 50 and 66 gallon 100108660 Table 1. 240V (FHPT & SHPT Models) models)** 17 Anode (14” for 66 and 80 gallon 100108677 18 Control Board, 240V 100263334 models)** 19 Start Capacitor* 100113138 17 Anode (42” for 80 gallon models)** 100108660 20 Relay* 100191859 17 Anode (Universal Link Style) 100110784 22 240V Compressor 100083556 Magnesium** Table 2. 208V/240V (HPTU) 17 Anode (Universal Link Style) 100110627 Aluminum** 18 Control Board, 208V & 240V 100263227 19 Run Capacitor* 100261846 *Not shown 21 208V Compressor 100261797 **For anode locations, see figure 15 on page 20 23 Thermal Overload Kit 100270597 *Not shown APPENDIX

30 • Residential Hybrid Electric Heat Pump Water Heater Service Handbook NOTES NOTES

Residential Hybrid Electric Heat Pump Water Heater Service Handbook • 31 Tefl on® is a registered trademark of Chemours © 10/19/16 A.O. Smith Corporation. All Rights Reserved.