OPERATOR'S CONTROLS AND INDICATORS. (CONT)
Hot Water Output Valve Controls hot water output from the water heater.
Water Temperature Gage
Indicates temperature of water inside water heater.
High Limit Control
Preset at the factory. Operates when operating control (4) fails.
Deactivates fuel solenoid valve when water temperature exceeds 190°F
(88°C) turning off fuel to the water heater.
Calibrated for water temperatures from 32° to 250°F (0° to 121°C).
Controls water heater burner to maintain water temperature between 100°
and 210°F (37° and 98°C).
Controls all electrical power to the water heater.
Fuel Pressure Gage
Indicates pressure of fuel supplied to the burner. Normal pressure is listed
in Table 2-1.
Fuel Shutoff Valve
Controls fuel flow to burner.
1. Clockwise rotation closes valve.
2. Counterclockwise rotation opens valve.
Controls amount of air to burner.
1. Turned downward increases air to burner.
2. Turned upward decreases air to burner.
Enables operator to visually check
combustion in combustion chamber.
Enables operator to observe
Motor Contactor Reset
Overload reset device breaks the circuit to each blower motor three-phase
windings when motor inputs are overloaded.