Line Voltage Testing - Bradford White E32-50S Service Manual

Line Voltage Testing

1. Turn "OFF" power to water heater.
2. Open control box located at the top of the heater to allow access to terminal block.
3. Set multi-meter to volts AC.
4. Turn power "ON" to water heater.
5. For 3 phase service, go to step 7.
6. For single phase service, check voltage across terminals
L1 & L2 of terminal block (see illustration 3).
A) Rated voltage IS present, power to the water
heater is okay.
B) Rated voltage NOT present, Check circuit breaker
at service panel.
7. For 3 phase service check across L1 & L2 and across
L1 and L3 (see illustrations 4 & 5)
A) Rated voltage IS present, power to the water
heater is okay.
B) Rated voltage NOT present, Check circuit breaker
at service panel.
High voltage exposure. Use caution when
making voltage checks to avoid personal injury.
Check voltage across
L1 & L2 of terminal block
Check voltage across
L1 & L2 of terminal block
Check voltage across
L1 & L3 of terminal block
Page 12
SERVICE PROCEDURE E32-II
Line Voltage Testing
WARNING
Single phase
Service from panel
Illustration 3
Three phase
Service from panel
Illustration 4
Three phase
Service from panel
Illustration 5