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 National Electrical Code ANSI/NFPA 70.
VENTING MANUAL RESET SWITCH
DRAFT HOOD
BLOWER MOTOR
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 23
of this manual or located adjacent to the thermostat on the water heater.
|
|
| ON/OFF SWITCH |
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 closed posi- |
| tion. See "Venting Manual Reset Switch" in the "For Your | ||
| Information | Section". | LIGH%_ |
6.There is a
which must be good (closed) for the thermostat to be oper- ated. See "High Temperature Shut Off System" in the "For Your Information Section".
GAS CONTROL
OPERATION
KNOB
When the thermostat calls for heat, gas is 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 air pressure switch will close and the indicator light will go off. A 120 volt circuit will be com- pleted through the venting manual reset switch and on to the 120 volt gas valve located just below the thermostat. The 120 voltgas valve will open allowing gas to flow to the burner. The standing pilot will establish a main burner flame.
GAS THERMOSTAT
120V GAS VALVE
AIR PRESSURE
SWITCH
BURNER
21
