TM 10-3510-209-10
2-2. LOCATION AND USE OF CONTROLS AND INDICATORS. (CONT)
Key
Control or Indicator
Function/Use
1
Vent Valve
Allows the operator to bleed air from water
heater
2
Water Temperature Gage
Indicates temperature of water being supplied
to the washer assembly
3
Motor Contactor Reset
Over current reset devices that break the
circuit to the blower motor, if motor input
leads are overloaded
4
Flame Safeguard Control
Lockout switch for flame safeguard control
Reset system When pressed, resets electrical
circuit to allow ignition in water heater
combustion chamber
4.1
Buzzer
Alerts the operator that his/her attention is
needed at the water heater controls
5
Hour Meter
Indicates length of time that burner has been
in operation
6
Water Temperature Control
A calibrated dial to set the desired outlet
water temperature between 0° and 250°F (-18 and
+121°C) Operates burner to maintain outlet
water temperature between 182° and 2100F (83
and 990C)
7
Load Limit Switch
Single-throw switch used to disconnect power to
(Water Heater Switch)
motor, ignition transformer,
and all electrical
controls on water heater
8
Fuel Pressure Gage
Registers pressure of fuel being supplied to
burner
9
Manual Fuel Shutoff Valve
Starts and stops flow of fuel to burner
a.
Valve turned clockwise closes valve and
stops flow of fuel to burner
b.
Valve turned counterclockwise opens valve
and starts flow of fuel to burner
10
Blower Shutter
Increases or decreases amount of air to burner
a.
Shutter turned downward increases amount of
air to burner
b.
Shutter turned upward decreases amount of
air to burner
Change 1
2-8
