Insulation Blankets - Whirlpool Hybrid Electric Heat Pump Water Heater Manual

Hybrid electric heat pump water heater

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If you lack the necessary skills required to properly install the

electrical wiring to this water heater, do not proceed but have a

qualiﬁ ed electrician perform the installation.

When making the electrical connections, always make sure:

•

The electrical service provides 240 VAC to the water heater

for proper operation. DO NOT use 208 VAC.

•

Wire sizes 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.

•

Wiring enclosed in approved conduit (if required by local

codes).

•

The water heater and electrical supply are properly

grounded.

•

The electrical supply has the proper overload fuse or

breaker protection.

Figure 10

Green Ground Screw

Junction Box

1/2” Conduit

Green

Opening

Ground

Wire

Power Supply

Connector

Black Wire

Red Wire

Always reference the wiring diagram located on the water

heater for the correct electrical connections and

connect the

electrical supply to the water heater in accordance with local

utility requirements and codes.

When installing the electrical wiring to the water heater:

1. Although this water heater is equipped with “Dry Fire”

protection, be sure tank is completely filled with water, and

all air is purged from the tank before making any electrical

connections. See “Draining and Flushing Section”.

2. Turn off power to the electrical wiring for the water heater at

the circuit breaker/fuse box.

3. If metal conduit is used for the grounding conductor:

A. The grounding electrode conductor shall be of copper,

aluminum, or copperclad aluminum. The material shall

be of one continuous length without a splice or joint.

B. Rigid metal conduit, intermediate metal conduit,

or electrical, metallic tubing may be used for the

grounding means if conduit or tubing is terminated in

fittings approved for grounding.

C. Flexible metal conduit or flexible metallic tubing shall

be permitted for grounding if all the following conditions

are met:

• The length in any ground return path does not

exceed 6 feet.

• The circuit conductors contained therein are

protected by overcurrent devices rated at 30 amperes.

• The conduit or tubing is terminated in fittings

approved for grounding.

For complete grounding details and all allowable exceptions,

refer to the current edition of the National Electrical Code NFPA

70.

4. A standard 1/2" conduit opening has been made in the

water heater junction box for the conduit connections.

5. Use wire nuts and connect the power supply wiring to the

wires inside the water heater's junction box (Figure 10).

6. The water heater must be electrically "grounded" by the

installer. A green ground screw has been provided on the

water heater's junction box. Connect ground wire to this

location.

7. Replace the wiring junction box cover using the screw

provided.

8. Turn on electrical power to the water heater.

9. Press the Efficiency button to set the operating mode.

NOTE: The water heater will conduct a system diagnostic

(approximately 8 minutes) prior to returning to operation.

10. Once the diagnostic sequence has finished, the fan should

turn on.

NOTE: The heat pump’s fan will not turn on if the

incoming water temperature is less than 59°F /

15°C

and/

or the ambient air temperature is above 120°F /

15°C

or below 45°F / 7.2°C. Should the internal diagnostics

detect a problem with the heat pump, an error code will be

displayed.

11. Set the desired operational mode. For typical installations,

the Hybrid Mode offers the best combination of efficiency

and hot water delivery. For detailed descriptions of all

operational modes see “Adjusting the User Interface

Module/Operational Modes” section.