Alarm Bell; Start-Up Procedure - Bradford White VR-150-(kW) Installation And Service Manual

SHUNT TRIP DISCONNECT (OPTIONAL):
Shunt trip disconnect provides a power disconnect upon a control sensed malfunction via a circuit breaker
installed in the main power supply to the water heater. The circuit breaker is shipped as a separate item
that must be field installed. The water heater 120 VAC control circuit provides a feed to the circuit
breaker that will shut down main power on either a low water level condition (if equipped) or high water
temperature. Once the water heater is installed and all power is connected, the toggle switch that arms
the shunt trip must be placed in the on position to provide the shunt trip function on the desired control
sensed malfunction.
ALARM BELL (OPTIONAL):
START-UP PROCEDURES:
Never operate the heating elements without being certain the water heater is filled with water and a
temperature and pressure relief valve is installed in the relief valve opening on top of the heater.
The pilot switch(es) (if equipped) mounted on the control cabinet permit the heater to be turned on and off
without having to operate the electrical disconnect switch. The pilot switch interrupts only the 120 VAC
control circuit in the water heater. Full power is still present at the terminal block, fuses and contactors.
An alarm bell with silencing switch is available as an option on this water heater.
The alarm bell can be used to provide an audible indication of a control sensed
malfunction. The user must specify the safety function or multiple safety
functions that the alarm bell will sound on when the water heater is ordered
from the factory. The alarm bell typically is used to indicate a low water
condition or a high water temperature condition. The alarm is furnished with a
silencing switch to turn off the audible alarm while trouble shooting a control
sensed malfunction that is indicated by an audible alarm. Once the control
sensed malfunction is corrected, the silencing switch must be returned to the
"ON" position to re-establish the audible alarm function.
20