American Water Heater STCE3-52/80/119 Phase Conversions - Electronic Control Models, L1 L2 L3

OPERATION & SERVICE

PHASE CONVERSIONS - ELECTRONIC CONTROL MODELS

Internal wiring connections between the Power Distribution Block and the heating elements is different on Surface Mount Control (see Figure 1 page 8) and Electronic Control (see Figure 2 page 9) model water heaters. Because of these differences there are two methods for field converting these models to work with single and three phase power supplies.

Service Note: 208 volt 54 KW models are 3 phase only and CAN NOT be converted to single phase. All other models can be phase converted.

SECURE MAIN POWER SUPPLY TO THE WATER HEATER AT THE MAIN BREAKER OR DISCONNECT SWITCH FIRST.

Service Warning: Never touch any wiring inside the water heater until the main power supply to the water heater has been turned off. Verify with a volt meter that all wiring has no voltage present before touching any wiring inside the water heater’s control panel.

Electronic Control Models

Three Phase to Single Phase

1Disconnect blue wires and yellow wires from terminal L-3.

2Connect all blue wires to terminal L-1 (with black wires).

3Connect all yellow wires to terminal L-2 (with red wires).

4Incoming power will be connected to terminals L-1 and L-2.

Service Note: 208 volt 54 KW models are three phase only - these models CAN NOT be converted to single phase. Keep in mind when converting other models from three phase power to single phase power the current/amperage will increase significantly - ensure breakers, fuses and wiring are properly sized to allow for the increased amperage before placing the water heater back in service. Contact a Qualified/Licensed electrician to make necessary changes.

Power Distribution Block

(see Figure 2 on page 9)

L1 L2 L3

Electronic Control Models

Single Phase to Three Phase

1Disconnect blue wires from terminal L-1.

2Disconnect yellow wires from terminal L-2.

3Connect all blue wires and yellow wires to terminal L-3.

4Incoming power will be connected to terminals L-1, L-2 and L-3.

Service Note: Keep in mind when converting from single phase power to three phase power the current/amperage will decrease significantly - ensure breakers and fuses are not oversized before placing the water heater back in service. Contact a Qualified/ Licensed electrician to make necessary changes.

Power Distribution Block

(see Figure 2 on page 9)

L1 L2 L3

Servicing should only be performed by a Qualified Service Agent

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