Operating Instructions

This water heater is equipped with an electrically operated vent-

ing system and a standing pilot. 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 110/120 volt power supply. The control system has an overall rating of 2 amps. The water heater must be securely and adequately grounded in accordance with local codes and with the latest edition of the Nationa! Electrical Code ANSI/NFPA 70.

2.The ON/OFF toggle 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 pilot must be lit. See Lighting instructions on page 22 of this manual or located adjacent to the thermostat on the water heater.

4.The gas control knob located on the thermostat must be turned to the "ON" position for the gas to be able to flow.

5.The venting manual reset switch must be in the dosed posi- tion. See Venting Manual Reset Switch in the For Your Information Section".

-

VENTING

RESET SVVITCH

DRAFT HOOD

ON/OFF SWITCH

BLOWER MOTOR

AIR PRESSURE

,SWITCH

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

which must be good (dosed) for the thermostat to be o_er- ated. See 'High Temperature Shut Off System in the For Your Information Section".

OPERATION

When the thermostat calls for heat, gas in allowed to flow to a (Normally open) pressure switch closing it. An electrical circuit

is then made to the blower, turning it on. The indicator light located on the control box will come on. When the blower has

achieved sufficient venting, the airpressure switch will dose and the indicator light will go off. A 24volt circuit will be complet- ed through the venting manual reset switch and on to the 24 volt gas valve located just below the thermostat. The 24 volt gas valve will open allowing gas to flow to the burner. The standing pilot will establish a main burner flame.

24V/120V

TRANSF_

GAS CONTROL

KNOB,

GAS PRESSURE

SWITCH

BURNER

GAS THERMOSTAT

THERMOCOUPLE

21

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Sears 153.335941, 153.335961, 153.335803, 153.335915, 153.335861, 153.335814, 153.335903 Operating Instructions, Operation

153.335815, 153.335961, 153.335903, 153.335915, 153.335803 specifications

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