Fan Assembly; Water Pump; Circuit Board; Figure 15 - Replace Fan Assembly - Rheem RUUD Iraining Manual

F a n A s s e m b l y
1. Turn off power to the water heater and remove the fan filter.
2. Using a flat blade screwdriver or ¼ inch nut driver, remove
the screws holding the fan cover.
3. Disconnect Ambient Air thermistor and fan Molex from
board.
4. Place fan assembly cover on a work surface and remove the
fan.
5. Install new fan.
6. Reconnect Ambient Air thermistor and fan Molex to board.
7. Reattached fan assembly cover to heat pump unit.
8. Reinstall fan filter.
9. Return power to the unit and check for safe operation.
W a t e r P u m p
1. Turn off the power to the water heater. Check for the presence of power with a
multimeter or test lamp.
2. Turn off the cold water supply at the shut off valve. Open a hot water faucet or the T&P
valve to relieve the pressure inside the tank. Open the drain valve at the bottom of the
tank and drain water to below the level of the element.
3. Disconnect the wiring harness to the water pump.
4. Remove the four Torx 20 screws from the pump. They may be some residual water
leaking when you remove the pump.
5. Mount the new pump and new o-ring. Tighten
the four Torx 20 screws.
6. Reconnect wiring harness.
7. Open the cold water isolation valve and allow
the HPWH to re-fill with water. Purge the
tank from the hot water faucet or T&P valve
you opened.
8. Return power to the unit and check for safe
operation.
C i r c u i t B o a r d
1. Turn off power to the water heater.
2. Using a flat blade and insulated screwdriver ground either the red or purple terminal to
the water heater to discharge any residual power in the capacitor.
3. Ground your body and remove the replacement board from the protective bag.
4. First, remove the model plug Molex from the old board and place on new board. This is
the only loose plug that could get lost.
Figure 15 – Replace Fan Assembly
Figure 16– Replace Water Pump
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Heat Pump Water Heater