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Servicing should only be performed by a Qualified Service Agent
15
OPERATION & SERVICE
PHASE CONVERSIONS - SURFACE MOUNT CONTROL MODELS
Internal wiring connections between the Power Distribution Block and the heating elements
are 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.
Surface Mount Control Models
Three Phase to Single Phase
1 Disconnect blue wires from terminal L-2.
2 Connect all blue wires to terminal L-1 (with black wires).
3 Disconnect all red wires from terminal l-3.
4 Connect all red wires to terminal L-2 (with yellow wires).
5 Incoming 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.
Surface Mount Control Models
Single Phase to Three Phase
1 Disconnect blue wires from terminal L-1
2 Disconnect red wires from terminal L-2.
3 Connect all blue wires to terminal L-2 (with yellow wires).
4 Connect red wires to terminal L-3.
5 Incoming 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.
L1 L2 L3
Power Distribution Block
(see Figure 1 on page 8)
L1 L2 L3
Power Distribution Block
(see Figure 1 on page 8)