Giant 105 - Voltage and Phase Conversion; Voltage Conversion Procedure; Phase Conversion Procedure

5
Voltage Conversion
A voltage conversion will require that all elements be replaced.
Surface Mount Thermostat:
1. Install the appropriate element control. See previous section “Wattage Conversion (kW)”.
2. Change the voltage tap on the control transformer. Each heavy duty model is equipped with a control transformer
having 5 connections: common (0V), 208V, 240V, 277V and 480V as well as secondary connections: 0V and 120V.
See the following figures. Only one wire needs to be changed on the control transformer in order to change
voltage. Remove the wire from the terminal marked 208V, 240V, 277V as well as 480V and attach it to the appropri-
ate terminal marked 208, 240, 277 or 480 for the conversion.
CAUTION: 600V WATER HEATERS CANNOT BE CONVERTED TO ANY OTHER VOLTAGES.
Phase Conversion
Phase conversion applies only to 208, 240
or 480 Volts Water heater models.
Surface mount thermostat – Three phase to single phase
1. Disconnect all blue wires and yellow wires from terminal L3
on the power distribution block.
2. Reconnect all blue wires to terminal L1.
3. Reconnect all yellow wires to terminal L2.
4. Connect incoming power to terminal block L1 and L2.
Surface mount thermostat – Single phase to three phase
1. Disconnect all blue wires from terminal L1
on the power distribution block.
2. Disconnect all yellow wires from terminal L2.
3. Reconnect all blue and yellow wires to terminal L3.
4. Connect incoming power to terminal block L1, L2 and L3.
480V 277V 240V 208V 0V
PRIMARY
X1 X2
0V 120V
480V 277V 240V 208V 0V
PRIMAIRE
X1 X2
0V 120V
480V 277V 240V 208V 0V
0V 120V
Three Phase
L1 L2 L3
Power distribution block
BLACK RED BLUE &
YELLOW
BLACK & RED &
BLUE YELLOW
Single Phase
L1 L2
Power distribution block
600V Models cannot be converted to Single Phase.
277V Models cannot be converted to Three Phases.
Note : Actual part may differ slightly from illustration depending on model.
CAUTION