CONQUEST 80 - Electronic Ignition Models; Pilot Positioning

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TO SHUT DOWN THE FURNACE

1. Set the thermostat to its lowest

setting.

2. Shut off the gas to the main

burners and pilot by turning the

knob to the "OFP' position, or by

depressing the gas control lever

and moving it to the "OFP'

position.

IMPORTANT: SHOULD OVER-

HEATING OCCUR OR THE GAS

SUPPLY FAIL TO SHUT OFF, SHUT

OFF THE MANUAL GAS VALVE TO

THE APPLIANCE BEFORE

SHUTTING OFF THE ELECTRICAL

SUPPLY.

PILOT ADJUSTMENT

Adjust the pilot flame to provide a soft

blue flame that surrounds the tip of

the thermocouple. The pilot burner

hood MUST be 1/16-inch to 1/8-inch

above the flame runner connecting

the burners. If the pilot burner is level

with or below the flame runner,

nuisance pilot outages may occur.

SEQUENCE OF OPERATION

1. The lighted pilot remains on at all

times unless the gas control

lever or knob is turned off.

2. Each time the thermostat calls

for heat, the induced draft blower

starts and closes the pressure

switch contacts.

3. After the pressure switch

contacts close, 24 volt power

opens the gas valve.

4. Gas flows to the main burners

and is lit by the pilot flame.

FIGURE 35

PILOT POSITIONING

5. The electronic blower control

board starts the main blower

20 seconds after the gas valve

opens.

6. When the thermostat call ends,

the gas valve closes and the

burners go out, but the pilot

flame remains lit.

7. The induced draft fan stops and

the pressure switch contacts

open.

8. The main blower continues until

timed off by the settings on the

electronic blower control board.

CHECKING THE PILOT SAFETY

CONTROL FEATURE

The pilot burner safety control does

not permit gas to flow to the main gas

burners unless there is a pilot flame

present to ignite the gas.

To check this function:

1. Remove the cap from the pilot

valve adjusting screw located on

top of the manifold gas valve.

2. With main burners operating, use

a small screw driver to turn the

adjustment screw clockwise until

the pilot gas is turned completely

off.

NOTE: Countthe number

of complete turns to do this.

3. The safety solenoid should close

the main gas valve within 90

seconds.

4. Return the pilot adjustment

screw to its original position and

replace the cap.

5. Follow the lighting instructions to

relight the pilot.

NOTE: If the main burners do not •

go out within 90 seconds after

turning out the pilot flame, replace

the manifold gas control valve.

ELECTRONIC MODELSIGNITION

LIGHTING INSTRUCTIONS

►

This appliance is equipped with

either a hot surface silicon carbide

ignition device or direct spark ignition

electrodes. This device lights the

main burners directly each time the

room thermostat calls for heat. See

the lighting instructions on the

furnace.

START THE FURNACE

1. Remove the burner compartment

control access door.

2. AcAUTION: BE suRE THAT

THE MANUAL GAS CONTROL

HAS BEEN IN THE "OFP'

POSITION FOR AT LEAST FIVE

MINUTES. DO NOT ATTEMPT

MANUALLY LIGHT THE

MAIN BURNERS.

3. Turn off the furnace electrical

power and set the room

thermostat to its lowest setting.

4. Turn the gas control knob to the

"ON" position, or move the gas

control lever to the

"ON" position.

5. Replace the burner compartment

control access door.

6. Turn on the furnace electrical

power.

7. Set the room thermostat to a

point above room temperature to

light the main burners. After the

burners are lit, set the room

thermostat to a desired

temperature.

TO SHUT DOWN THE FURNACE

1. Set the room thermostat to its

lowest setting.

2. Shut off the gas to the main

burners by turning the gas

control knob to the "OFP'

position, or by depressing the

gas control lever and moving it to

the "OFF" position.