Furnace User Manual 2019
6
WARNING
Keep both doors in place except for inspection and
maintenance. An interlock switch prevents furnace
operation if the blower door is not in place.
1. Close the external manual gas shut-o valve.
2. Turn o 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 ve minutes to clear out any gas. Then smell for
gas, including near the oor as some types of gas are
heavier than air.
8. If you smell gas following the ve minute waiting period
in step 7, immediately follow the instructions on the
cover of this manual. If you do not smell gas after ve
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-o valve.
11. Turn on the electrical power to the furnace.
12. Adjust the thermostat to a setting above room
temperature.
13. After the burners are lit, set the thermostat to desired
temperature.
To shut down your furnace, follow the steps listed below.
1. Set the thermostat to the lowest setting.
1. Integrated control closes gas valve extinguishing
ame.
2. Induced draft blower is de-energized following a 15
second delay. The circulator blower is de-energized
following a 90, 120, 150, or 180 second delay period.
3. Remove the burner compartment door.
4. Move the furnace’s gas valve ON/OFF switch to the
OFF position.
5. Close the external manual gas shut-o valve.
6. Replace the burner compartment door.
Furnace lockout is characterized by a non-functioning
furnace (circulator blower may be running continuously)
providing a diagnostic LED code. Lockout results when a
furnace control detects abnormal conditions. If the furnace
is in “lockout”, it may be reset by any of the following
methods:
1. One hour automatic reset. Control will automatically
reset itself and attempt to resume normal operations
following a one hour lockout period.
2. Power interruption. Interrupt 115 volt power to the
furnace for greater than 20 seconds.
3. Thermostat cycle. Interrupt thermostat signal to the
furnace for between 0 and 20 seconds.
If the condition which originally caused the lockout still
exists, the control will return to lockout. If your furnace
frequently locks out, a problem exists which must be
corrected. Contact a qualied servicer.
Maintenance is to be performed by a qualied service
technician only. User maintenance is to be restricted to
frequent air lter changes and to ensure the warnings and
notices found elsewhere in this manual be followed. We
recommend that at a minimum system maintenance be
performed by a qualied service technician prior to the
beginning of each heating season, and if equipped with air
conditioning, prior to air conditioning season.