Operating Instructions

This water heater is equipped with an electrically operated vent- ing system and electronic control. For the burner to come on, the water heater thermostat must call for heat. Then the system

will begin sequencing, each section proving itself before gas is allowed to flow to the burner.

BEFORE THE WATER HEATER WILL OPERATE:

1.The control system must be connected to a grounded 110/120 volt power supply. The control system has an over- all rating of 2 amps. The water heater must be securely and

adequately grounded in accordance with local codes and with the current edition of the National Electrical Code ANS1/NFPA 70.

2.The ON/OFF rocker switch, located on the control box

above the thermostat must be in the "ON" position for the electrical control system to operate allowing the gas portion to operate (ignite burner).

3.The venting manual reset switch must be in the closed position. See "Venting Manual Reset Switch" in the "'ii-oubleshooting Guide" section.

4.There is a non-resettable hi-limit switch in the thermostat,

which must be good (closed) for the thermostat to be operat-

ed. See "High Temperature Limit Switch" in the "_I_oubleshooting Guide" section.

OPERATION

When the thermostat calls for heat, gas is allowed to flow to a (N/O) pressure switch closing it. An electrical circuit is then made to the blower, turning it on. When the blower has achieved sufficient venting, the air pressure switch will close. A 120 volt circuit will be completed through the venting manual reset switch and on to the 120 volt gas valve. The 120 volt gas valve will open allowing gas to flow to the burner. The hot sur- face ignitor will establish a main burner flame.

 

VENTING MANUAL

BLOWER MOTOR

RESET SWITCH

DRAFT HOOD

ON/OFF SWITCH

AIR PRESSURE

AIR INTAKE

\ CH

 

_ '

120V GAS VALVE

BURNER

_'/7HOTSURFACE

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Kenmore 153.332990HA, 153.33296, 153.332870HA Operating Instructions, Before the Water Heater will Operate, Operation