User Information

6
night and during the day. It may also be set to automatically
switch from heating to cooling. The fan switch may also be
set to ON or Auto. The ComfortNet™ system also includes
advanced set up and diagnostic features which is explained
in the ComfortNet User Manual provided with the control.
F URNACE O PERATION
E LECTRICAL COMPONENTS ARE CONTAINED IN BOTH
COMPARTMENTS . T O AVOID PERSONAL INJURY ,
ELECTRICAL SHOCK OR DEATH , DO NOT REMOVE ANY
INTERNAL COMPARTMENT COVERS . C ONTACT A QUALIFIED
SERVICER AT ONCE IF AN ABNORMAL CONDITION IS
NOTICED .
WARNING
Keep both doors in place except for inspection and mainte-
nance. An interlock switch prevents furnace operation if the
blower door is not in place.
FURNACE START-UP
1. Close the external manual gas shut-off valve.
2. Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
5. This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the
burner by hand.
6. Move the furnace’s gas valve ON/OFF switch to the OFF
position.
7. Wait five minutes to clear out any gas. Then smell for
gas, including near the floor as some types of gas are
heavier than air.
8. If you smell gas following the five minute waiting period
in step 7, immediately follow the instructions on the cover
of this manual. If you do not smell gas after five minutes,
move the furnace’s gas valve ON/OFF switch to the ON
position.
9. Replace the burner compartment door.
10. Open the external manual gas shut-off valve.
11. Turn on the electrical power to the furnace.
12. Adjust the thermostat to a setting above room tempera-
ture.
13. After the burners are lit, set the thermostat to desired
temperature.
Gas Valve On/Off
Selector Switch
Honeywell Model VR8215 (Single-Stage)
Gas Valve On/Off
Selector Switch
Honeywell Model VR9205 (Two-Stage)
INLET
OUTLET
Gas Valve On/Off
Selector Switch
Honeywell Model VR9205R (Modulating Gas Valve)
White-Rodgers Model 36G22 (Single-Stage)
OUTLET
INLET
On/Off Switch
White-Rodgers Model 36G54 (Two-Stage)
FURNACE SHUT DOWN
To shut down your furnace, follow the steps listed below.
1. Set the thermostat to the lowest setting.
2. Integrated control closes gas valve extinguishing flame.
3. Induced draft blower is de-energized following a 15 sec-
ond delay. The circulator blower is de-energized follow-
ing a 90, 120, 150, or 180 second delay period.
4. Remove the burner compartment door.
5. Move the furnace’s gas valve ON/OFF switch to the OFF
position.
6. Close the external manual gas shut-off valve.
7. Replace the burner compartment door.