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Your safety and the safety of others are very important.

We have provided many important safety messages in this manual and on your appliance. Always read and obey all 
safety messages.

This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word “DANGER” or
“WARNING.” These words mean:

You can be killed or seriously injured if you don’t 
immediately follow instructions.

You can be killed or seriously injured if you don’t
follow instructions.

All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you 
what can happen if the instructions are not followed.

Important Safety Instructions

CAUTION: 

Hydrogen gas is produced in a hot water system served by this heater that has not been used for a long 

period of time (2 weeks or more).  Hydrogen gas is extremely 

fl

 ammable. To reduce the risk of injury under these 

conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before 

using any electrical appliance connected to the hot water system. When hydrogen is present, there will probably be 

an unusual sound such as air escaping through the pipe as the water begins to 

fl

 ow. There should be no smoking or 

open 

fl

 ame near the faucet at the time it is open.

The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of 
substances known to the State of California to cause cancer, birth defects, or other reproductive harm, and requires 
businesses to warn of potential exposure to such substances.
WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects, or other 
reproductive harm. 
This appliance can cause low-level exposure to some of the substances included in the Act.

WATER HEATER SAFETY

IMPORTANT:

 The heat pump portion of this water heater uses R-134a refrigerant. See the data plate on the heat pump 

compressor for charge level.

Summary of Contents for 318258-000

Page 1: ...Information 3 Consumer Responsibilities 3 Unpacking Instructions 3 4 Location Requirements 4 Water System Piping 5 6 Temperature Pressure Relief Valve 7 8 Electrical Requirements 8 9 Installation Checklist 10 Operating Your Water Heater 11 13 Before Using 11 Water Temperature Regulation 11 Adjusting the User Interface Module Operational Mode 12 Operational Conditions 13 Maintenance of Your Water H...

Page 2: ...s extremely flammable To reduce the risk of injury under these conditions it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system When hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow There should be no smoking or...

Page 3: ...eipt as proof of purchase Basic Operation Fundamentals The Heat Pump Water Heater HPWH is an integrated heat pump water heater unit having an 850 watt compressor and external coil heat exchanger with backup electric elements See Figure 1 When in Efficiency Mode the heat pump draws heat from the ambient air in the room and transfers it to the water in the tank through the coil heat exchanger While ...

Page 4: ...read all instructions before attempting to assemble and install this product After installation dispose of recycle all packaging materials Location Requirements Site location Select a location near the center of the water piping system The unit must be installed indoors and in a vertical position on a level surface The flooring beneath the water heater must be able to support the weight of the wat...

Page 5: ...hown in Figure 4 If installing the water heater in a closed water system 5 install an expansion tank in the cold water line as specified under Closed System Thermal Expansion Install a shut off valve in the cold water inlet line It 6 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 Install a discharge l...

Page 6: ...des Use appropriate primer and glue to cement the condensate drain lines to the heat pump drain pan NOTE The heat pump drain pan is ABS and the two condensate drain pipes should be PVC If a condensate pump is installed it should shut off the heat pump in the event the condensate pump fails or the float switch in the pump activates See Condensate Pump Installation section Closed System Thermal Expa...

Page 7: ...lve and the end of the discharge line Shall terminate a maximum of six inches 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 building Shall be of material listed for hot water distribution Shall be installed to allow complete drainage of both the valve and discharge line Temperature Pressure R...

Page 8: ...lled with water and all air is purged from the tank before making any electrical connections See Draining and Flushing Section Turn off power to the electrical wiring for the water heater at 2 the circuit breaker fuse box Remove the left louvered access panel when facing the 3 water heater by loosening the screws securing it to the water heater Loosen the screws securing the electrical junction bo...

Page 9: ...7 Press the power button to turn the water heater on 8 and select the desired operational mode After about 8 minutes the heat pump will turn on Test the operation of the shut off switch by unplugging 9 the condensate pump and filling the condensate reservoir with water until the float switch opens the circuit The heat pump should turn off and the error code 10 CONDENSATE DRAIN ALARM will appear on...

Page 10: ... free of leaks Heater completely filled with water See Water Piping System section Closed system pressure buildup precautions installed See Closed System Thermal Expansion section Mixing valve when applicable installed per manufacturer s instructions See Water Temperature Regulation section INSTALLATION CHECKLIST Condensate Drain Line Installation Must be located with access to an adequate drain o...

Page 11: ...hing in the red reset button located on the ECO block If the ECO continues to shut off the water heater contact a qualified person for service Water Temperature Regulation Water temperature over 125 F can cause severe burns instantly or death from scalds Children disabled and elderly are at highest risk of being scalded Feel water before bathing or showering Temperature limiting valves are availab...

Page 12: ... the User Interface are touch sensitive and require only a light touch to actuate EFFICIENCY Efficiency Mode Is the most energy efficient mode This mode uses the heat pump to heat water in the tank The elements are not used unless the ambient operating temperature is below 45 F or above 109 F If hot water demands are not met in Efficiency Mode it may be necessary to switch to Hybrid Mode HYBRID Hy...

Page 13: ...ard These noises are common and may result from the following Normal expansion and contraction of metal parts 1 during periods of heat up and cool down Sediment buildup on or around the elements could 2 create varying amounts of noise and may cause premature tank failure Drain and flush the tank as directed under the Draining and Flushing section The heat pump compressor or fan running 3 Stacking ...

Page 14: ...PORTANT 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 Press the power button to turn the water heater on 8 NOTE The water heater will conduct a system diagnostic prior to operation If the water heater is go...

Page 15: ...Air Filter Remove and inspect clean if needed and reinstall Condensate drain pan and condensate lines The lower 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 materials in the installation area Presence of combustible materials near the water heater After servicing this wat...

Page 16: ... OPEN OR AD ERROR 1 Upper Temperature Sensor is not functioning Contact a qualified person to service the unit 1 LOWER TEMP SENSOR SHORT OR OPEN OR AD ERROR 1 Lower Temperature Sensor is not functioning Contact a qualified person to service the unit 1 DISCHARGE TEMP SENSOR SHORT OR OPEN OR AD ERROR 1 Discharge Temperature Sensor is not functioning Contact a qualified person to service the unit 1 C...

Page 17: ...n is at the top Insulate exposed piping 5 Repair hot water leaks 6 Call qualified person for service 7 Drain and flush tank Water conditioning may 8 be necessary to minimize build up HIGH OPERATION COSTS Temperature set point too high 1 Air filter dirty 2 Electric mode selected 3 Water connections to unit reversed 4 Heat lost thru long run of exposed 5 pipe Hot water leak at faucet or piping 6 Sed...

Page 18: ...14 Drain Valve 15 Protective Plastic Cover 16 ECO Cover 17 Control Board 18 Relay 19 EPS Cover 20 Ambient Coil Discharge Temperature Sensor 21 Upper Lower Tank Temperature Sensor 22 Run Capacitor 23 Control Board Module Fuses REPAIR PARTS Repair parts may be ordered through your plumber local distributor home improvement center or by calling 1 800 365 0024 When ordering repair parts always give th...

Page 19: ...19 NOTES ...

Page 20: ...20 Copyright 2010 State Industries Inc All rights reserved ...

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