GM9S80 Installation Manual
18
1.
furnace.
2.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
This furnace is equipped with an ignition device
burner by hand.
5. Move the furnace gas valve manual con
position.
6.
7.
the safety instructions in the Safety Considerations on
minutes, move the furnace gas valve manual control to
the ON position.
8. Replace the burner compartment door.
9.
furnace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room
temperature.
12. After the burners are lit, set the thermostat to desired
temperature.
• On a call for heat, the thermostat contacts close & the
• The control board microcomputer runs its self-check
routine.
•
Pin 8 of the 12 Pin connector).
•
• The control module performs a gas valve circuitry check
to verify gas valve relay state and presence of voltage
at the valve.
• The system will energize the Induced draft blower.
• The pre-purge period begins once the pressure switch
• After the completion of pre-purge, the control will
energize the igniter.
• After completion of the ignitor warm-up period:
• The gas valve is energized.
•
• After 30 seconds the indoor blower is energized on
heating speed.
•
• The gas valve is de-energized.
• The inducer remains energized for the post purge period
(15 seconds).
•
(90 seconds by default, adjustable from 30 – 180
seconds).
To change the main blower speed in HEATING mode, follow
the following steps:
1.
speed number).
2. The control shall rotate available speed number every
time Left/Right switches are pressed. Table below shows
the available speeds for Low & High heat mode.
3. When the center switch is pressed, the current displayed
speed shall be selected, and control shall apply the
newly selected speed in next heating call.
available heating speeds
THERMOSTAT CALL AVAILABLE SPEEDS
W/W1
F01
F03
F04
F02 (DEFAULT)
To change the main blower speed in circulation mode, follow
the following steps:
1.
2. The control will rotate available speed number every
time left/right switches are pressed. All 9 speeds are
available for circulation.
3. When the center switch is pressed, the current displayed
speed will be selected, and control will immediately apply
that speed setting.
THERMOSTAT
CALL
AVAILABLE
SPEEDS
G
F01
F02
F03
(DEFAULT)
F04
F05
F06
F07
F08
F09