Heat Pump Water Heater INSTALLATION START-UP MAINTENANCE PARTS Hybrid Electric Heat Pump Water Heater Models HPW-50-6 This manual must be used by a qualified installer/service technician. Read all instructions in this manual before installing. Perform steps in the given order. Failure to comply could result in substantial property damage, severe personal injury, or death.
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important product information. DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
TABLE OF CONTENTS PART 1 – GENERAL SAFETY INFORMATION .......................................................................................................................... 4 A. PRECAUTIONS .......................................................................................................................................................................... 4 B. WATER TEMPERATURE ADJUSTMENT ..............................................................................................................
PART 1 – GENERAL SAFETY INFORMATION For your safety, the information in this manual must be followed to minimize the risk of fire, explosion, electric shock, and to prevent property damage, personal injury, or death. A. PRECAUTIONS This water heater is for indoor installations only. Clearance to combustible materials: 0” top, bottom, sides and back. The water heater must have room for service: 16” top, 12” sides, and 7” front and back are minimum recommended service clearances.
Safety and energy conservation are factors to be considered when selecting the water temperature setting via the water heater user interface. Water temperatures above o 125 F can cause severe burns or death from scalding. Be sure to read and follow the warnings outlined on the label pictured in Figure 1. This label is also located on the water heater near the top of the tank. Mixing valves for reducing point-of-use water temperature by mixing hot and cold water in branch water lines are available.
G. SAFETY CONSIDERATIONS 1. Turn off power to the water heater if it has been subjected to overheating, fire, flood, or physical damage. 2. Do Not turn on water heater unless it is filled with water. 3. Do Not turn on water heater if cold water supply shut-off valve is closed. 4. Do Not store or use gasoline or other flammable vapors or liquids, such as adhesives or paint thinner, in the vicinity of this or any other water heater.
Place the water heater in such a manner that the air filter, cover, and front panels can be removed to permit inspection and servicing, such as removal of elements or cleaning of the filter. The water heater and water lines should be protected from freezing temperatures and highly corrosive atmospheres. Do not install the water heater in outdoor, unprotected areas.
Figure 4 – Front and Rear Clearances Figure 5 – Top Clearance A 16” minimum clearance is required to remove the filter for cleaning. The hot and cold water plumbing and electrical connections must not interfere with the removal of the filter. C. CONDENSATE DRAIN The water heater has a condensate drain: therefore a drain must be available in close proximity to the unit. The drain must be no higher than 36” above the floor (laundry drain is acceptable).
Figure 6 – Typical Water Heater Installation Figure 7 – Typical Vertical and Horizontal Piping Details LP-374 REV. 3.25.
F. CONDENSATION DRAIN TUBES This unit has a built-in condensation tray to collect moisture discharge from the evaporator coil. The water collected in the tray drains out of the tube on the back of the unit. Two flexible hoses are included with this unit. It is important that both of these hoses are attached to the two drain ports on the back of the unit. Attach the shorter 3” hose to the top drain port. Cut a 1 ½” piece off the long hose.
To reduce the risk of excessive pressures and temperatures in this water heater, install temperature and pressure protective equipment required by local codes and no less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials, as meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22.
If local codes require external application of insulation blanket kits, the manufacturer’s instructions included with the kit must be carefully followed. Application of any external insulation, blankets, or water pipe insulation to this water heater will require careful attention to the following: Do not cover the temperature and pressure relief valve. Do not cover access panels to the heating elements. Do not cover the electrical junction box of the water heater.
Confirms inputs and locks or unlocks the key pad. Press this key for 3 seconds to lock or unlock the key pad. In order to confirm Mode or set point temperature inputs, hold this key for 10 seconds. 8. MODE Button Allows users to choose an operating mode. Detailed Description of Control Functions 1. Auto-Confirm Function 10 seconds after pressing control pad keys, the auto-confirm function automatically accepts entered data and returns the water heater into operating mode. 2.
3. High Temperature Setting o If the temperature set by user or actual temperature is above 120 F, this icon lights. This icon will shut off if water temperature is less o than 120 F, or when the display is in screen save mode. 4. Lock Icon This icon lights when the key pad is locked, and will shut off when the key pad is unlocked. 5.
After the desired temperature setting has been selected, press ENTER to accept the setting. If the water temperature setting is changed and the ENTER key is not pressed to accept it after 10 seconds of no control activity, the control will automatically revert to the previous temperature setting. D. ADJUSTING THE FUNCTION MODE This water heater defaults to the Auto operating Mode. The Auto Mode is the recommended setting for this water heater, but can be changed if desired.
2. Diagnostic Function To query appliance diagnostics, press and hold the ENTER and UP buttons together for one second. After opening the Diagnostic Function, use the UP and DOWN arrows to scroll through the diagnostics.
A heat pump water heater equipped with a DR module will automatically recognize what energy cost rate is available and adjust its mode and temperature setting to use less energy when rates are medium, high, and critical. When the heat pump water heater responds to these signals, it will display the letters “EP” in the screen, along with other information indicating that energy pricing periods are in effect. When the signal is low or when no DR module is connected, the unit will continue to run.
C. VACATION AND EXTENDED SHUTDOWN If the water heater is to remain idle for an extended period of time, the power and water to the water heater should be turned off to conserve energy and prevent a buildup of dangerous hydrogen gas. The water heater and piping should be drained if they might be subjected to freezing temperatures. After a long shutdown period, the water heater operation and controls should be checked by qualified service personnel.
Are the tank and all related plumbing connections leak free? 3. Condensate lines are in place: a. Short tube on upper drain nozzle and directed to catch pan or floor drain. b. Longer tube on lower drain nozzle and directed into a floor drain or a condensate pump. 4. Temperature and pressure relief valve is working and drain lines completed per local codes. 5. Electrical connections allow air filter removal. 6. Verify control displays 120 F in Auto Mode. 7. Front cover is in place.
Figure 17 - Parts Figure 18 – Junction Box Parts LP-374 REV. 3.25.
Figure 19 – Heat Pump Parts, Sensors, and T2 Sensor (Upper Element) Locations ITEM # DESCRIPTION 1 Inlet Dip Tube 2 Magnesium Anode Rod (not shown) 3 Outlet Dip Tube 4 Electric Heating Element 5 Display 6 Display Panel 7 Fan Motor Cover 8 Compressor 9 Fan Wheel (not shown) 10 Front Shroud 11 Junction Box 12 Junction Box Cover 13 Left Rail (not shown) 14 Evaporator Motor 15 Fan Motor Cover 16 Top Cover 17 Right Rail (not shown) 18 Mesh Screen 19 Filter 20 Rear Shroud 21 Electronic Control Box Cover 22 El
PART 7 – MAINTENANCE CHECKLIST AND ERROR CODES Before calling for service, follow the troubleshooting tips below. You may not have to call for service. PROBLEM POSSIBLE CAUSES Water heater is Noisy Fans are used to move air through the system. Fan noise volume will vary as water is heated.
The following table describes error codes and possible solutions. If your water heater displays an error code, call a qualified service agent to fix the problem. ERROR CODE ALL DESCRIPTION WHAT TO DO ALL Inspect for proximity to high voltage power sources. 1. Check if sensor wires are correctly connected and/or damaged. 2. Check if T2 sensor is damaged. 3. Check T2 sensor resistance. o o o 4. Check actual temperature in Celsius 0 C ~ 60 C (tolerance +5 C) 1.
INSTALLATION AND MAINTENANCE NOTES LP-374 REV. 3.25.
HTP CUSTOMER INSTALLATION RECORD FORM The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty claim. After reading the important notes at the bottom of the page, please also sign this document.
