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OPERATION
Form No. EBOOSTERBWM-1009
12
General
Use the following procedures to operate the Magnum Series
Commercial Electric Booster water heater.
Read all safety messages in the Important Safety
Information section before operating this equipment.
DO NOT turn on power to the booster water heater until
tank has been filled with water and all air has been vented
through dish machine rinse nozzle. The heating elements
will burn out in seconds if operated when they are not
immersed in water.
Startup
1. Close the drain pipe shut-off valve.
2. Open the shut-off valve to primary water supply. The water
temperature at the inlet should be 110° to 140°F (43° to
60°C) and should not exceed 160°F (71°C)
.
NOTE: Minimum temperature differential between inlet and
outlet should never be less than 20°F (11°C).
3. When the booster tank is filled with water, vent all air from
the tank before turning on the unit. To vent the booster tank:
• Open the temperature/pressure relief valve.
• Run the dish machine through several cycles to vent air
through the rinse nozzles.
4. Check all plumbing connections for leaks.
5. Check the temperature/pressure relief valve discharge
opening to be sure it is not blocked and no scale or other
foreign matter has reduced the size of the opening.
BURN HAZARD:
• Water in unit is very hot. Wear protective gloves and
proper attire when operating to avoid injury.
• Some exterior surfaces on unit will get hot. Avoid
unnecessary contact with unit.
6. Turn on the electrical supply to the booster heater.
7. Move the Power ON/OFF switch to the ON position. The
indicator light will turn on.
Figure 10. Control Panel
WARNING
CAUTION
Power ON/OFF
Switch
Indicator Light
8. When the booster water heater has had sufficient heating
time, operate the rinse cycle and check the water
temperature and pressure readings on the gauges.
Water temperature at the booster outlet should be
185°–190°F (85°–88°C) and flow pressure should be 20
psi (138 kPa) maximum.
NOTE: Outlet water temperatures can be adjusted
for low-temperature dish machine applications. See
the Maintenance section for thermostat adjustment
procedure.
Units are equipped with a high temperature limit safety
switch that will shut off power if the unit overheats.
Contact an Authorized Service Agent if high temperature
limit safety switch cannot be reset or continues to trip.
Shutdown
Under normal and regular operation, Bradford White
recommends that the unit be turned on at all times.
If the booster water heater will not be used for an extended
period of time or will be exposed to freezing conditions it should
be drained to prevent damage to the unit.
1. Move the Power ON/OFF switch to the OFF position.
2. Disconnect power supply to the booster water heater.
3. Close the inlet water supply line shut-off valve to the
booster water heater.
ALWAYS drain booster water heater with power to the unit
off or element burnout could occur.
4. Open the drain shut-off valve and drain all water from the
booster water heater tank.
NOTICE
WARNING