Bradford-White Corp MAGNUM Series Commercial Electric Booster Maintenance, Thermostat Adjustment

General		MAINTENANCE
		Outer
Bradford White Magnum Series Commercial Electric Booster		Adjustment
water heaters are designed for maximum durability and		Screw
performance, with minimum maintenance.
WARNING
ELECTRIC SHOCK HAZARD:
• Turn power OFF at disconnect switch/circuit breaker		Inner
and allow unit to cool before performing any		Adjustment
maintenance or cleaning.		Screw
• This unit must be serviced by qualified personnel only.	Figure 12. Thermostat Adjustment
Service by unqualified personnel may lead to electric	NOTE: 1/6 turn of the outer screw equals 12°F (6.7°C).
shock or burn.
• Use only Genuine Bradford White Replacement Parts	If recalibration is necessary, with the outer screw at high stop
when service is required. Failure to use Genuine Bradford	turn inner adjustment screw clockwise to raise the set point.
White Replacement Parts will void all warranties and may	NOTE: 1/6 turn of the inner screw equals 8°F (4.4°C).
subject operators of the equipment to hazardous	Temperature/Pressure Relief Valve
electrical voltage, resulting in electrical shock or burn.
Genuine Bradford White Replacement Parts are specified	The temperature/pressure relief valve lever must be operated at
to operate safely in the environments in which they are	least once a year to ensure that waterways are clear. Certain
used. Some aftermarket or generic replacement parts do	naturally occurring mineral deposits may adhere to the valve,
not have the characteristics that will allow them to	blocking waterways and rendering it inoperative. When the lever
operate safely in Bradford White equipment.	is operated, hot water will discharge from the attached discharge
This unit has no “user-serviceable” parts. If service is	line if waterways are clear. In addition to annual operation of the
	valve lever, the condition of the temperature/pressure relief valve
required on this unit, contact an Authorized Service Agent	must be inspected every two to four years by a licensed plumber
or the Bradford White Service Department.	or qualified service technician.
Thermostat Adjustment	WARNING
The thermostat is factory calibrated to produce temperatures of
185°–190°F (85°–88°C). If adjustment or recalibration is	Inspect combination temperature/pressure relief valve at
required use the following procedure.	least once every two to four years, depending on local
NOTE: Low temperature dish machines require the thermostat	water conditions. Contact a licensed plumber or qualified
	service technician for inspection. Replace valve, if
to be adjusted to 140°–150°F (60°–66°C).	necessary. DO NOT attempt to self-inspect valve.
1. Remove the access cover.	BURN HAZARD: Water in unit is very hot. Wear protective
	gloves and proper attire when operating to avoid injury.
	Use the following procedure to test the temperature/pressure
	relief valve.
	1. Make sure a properly installed	Temperature/Pressure
	discharge line is connected to	Relief Valve Lever
	the relief valve. The discharge	(Closed Position)
Thermostat	line must direct the flow of hot
High Temperature	water from the valve to a
Limit Safety Switch	proper place of disposal.
	2. Pull up slightly on the relief valve
Access Cover	lever. The lever is connected to
	a strong spring, so it will take
	some force to move the lever.
Figure 11. Access Cover for Thermostat and	• If water flows freely from the	Discharge
	discharge line, the valve is
		Line
High Temperature Limit Safety Switch	clear and operating properly.
2. Adjust the thermostat in the desired direction.	Release the lever down into the closed position (vertical).
• To lower the temperature setpoint, turn the outer	• If water does not flow freely from the discharge line, the
adjustment screw counterclockwise.	valve is obstructed and must be replaced immediately.
• To raise the temperature setpoint, turn the outer	Release the lever, turn off the booster water heater, and
	contact a trained, licensed plumber to replace the valve.
adjustment screw clockwise.	NOTE: If dripping or discharge occurs when the relief valve
	lever is in the closed position (vertical), turn off the
	booster water heater and contact a licensed plumber
	immediately. Discharge may indicate that an unsafe
Form No. EBOOSTERBWM-1009	temperature or pressure condition exists.
	13