Bradford-White Corp Commercial Electric Water Heaters Manual De Usuario

Checklist
Before calling for service, check the following
points to see if the cause of trouble can be
identified and corrected. Reviewing this checklist
may eliminate the need of a service call and
quickly restore hot water service.

1. Ensure that the electrical disconnect switch 

serving the water heater is in the “ON” 
position.  The pilot switch(es) on the cabinet 
should also be in the on position.  In some 
areas, water heater electrical service may be 
limited by the power company.  If the heater 
operates on a controlled circuit, heater 
recovery may be affected.

2. Check the fuses. The electrical disconnect 

switch usually contains fuses. The water 
heater has fuses located behind the cabinet 
front door.  When replacing internal fuses in 
the water heater control panel, insure that the 
same type and size of fuse is used.

3. If the water was excessively hot and is now 

cold, the manual reset high limit may
have operated.

To reset, turn off electricity and push the reset 
button.  The high limit is located above the 
upper most heating element in the storage tank. 
On some high input models additional hi 
limits may be located behind the side access 
panel. Repeat operation of the high 
temperature cut-off should be investigated by 
your mechanical contractor or by a qualified 
technician.  A contactor or thermostat may be 
malfunctioning.

4. The capacity of the heater may have been 

exceeded by a large demand for hot water. 
Large demands require a recovery period to 
restore water temperature.

5. Cold incoming water temperature will 

lengthen the time required to heat water  to the 
desired temperature. If the heater was 
installed in the summer when incoming water 
temperature was warm, colder ground water 
in the winter months can create the effect of 
less hot water.

6. Look for wasted hot water and leaking or 

open hot water faucets.

7. Sediment or lime scale may be affecting water 

heater operation.  Refer to “Maintenance”
for details.

Refer to “Temperature Regulation” and reset the
thermostat setpoint to a lower temperature that
will meet requirements for hot water

1. Sediment or lime scale accumulation on the 

elements causes sizzling and hissing noises,
when the heater is operating.  If this occurs, 
the tank bottom and elements should be 
cleaned. Refer to “MAINTENANCE”
for details.

2. Some of the electrical components of the 

water make sounds which are normal. 
Contactors will “click” or snap as the heater 
starts and stops. Transformers and contactors 
often hum.

1. Check to see if the drain valve is

tightly closed.

2. The apparent leakage may be condensation 

which forms on cool surfaces of the heater 
and piping.

3. If the outlet of the relief valve if leaking, it 

may represent:

a.  Excessive water pressure.
b.  Excessive water temperature.
c.  Faulty relief valve.