Manual

User's Information Manual
Pressure Switch
The furnace is equipped with one or more pressure switches to
shut down the furnace under various flue conditions. The
switches are connected to the furnace by factory supplied tubing.
OperatingYourFurnace
Keep the blower access door and all access panels in place ex-
cept for inspection or maintenance.
Before starting your furnace be sure you read and understand all
of the procedures in this manual. Check to make sure the furnace
filter is clean and correctly installed.
CARBON MONOXIDE POISONING HAZARD
Failure to provide adequate combustion and
ventilation air could result in death and/or
personal injury.
Provisions for combustion and ventilation air
must be provided for in accordance with
installation instructions supplied with furnace.
Starting The Furnace
See Figure 7 for an illustration of the gas control valve.
1. Turn the thermostat to its lowest temperature setting or to
OFF if equipped with a System Select Switch.
2. Turn OFF all electric power to the furnace at the disconnect
switch or circuit breaker.
3,
Remove the burner compartment door by removing the
two(2) screws securing the door in front and lifting the door
up and outwards. Removing the door will expose the gas
control valve switch.
4. Slide the gas control valve switch to OFF. See Figure 7.
5. Wait five (5) minutes to clear out any gas. If you then smell
gas, STOP! Follow the safety information on the cover of
this manual. If you do not smell gas, go to the next step.
6. Slide the control valve switch to ON.
7. Reinstall all doors.
8. Turn ON all electrical power to the furnace.
9. Set the thermostat to the desired temperature and the Sys-
tem Select Switch to HEAT.
The furnace will activate an igniter which lights the pilot flame.
When the pilot lights and verifies a steady flame, the ignition sys-
tem brings on the main burners.
System Retries
The ignition system tries to relight the burners whenever the built-
in flame sensor detects no flame flame while the thermostat calls
for heat.
TurningOff The Furnace
Set the thermostat to the lowest temperature setting or set Sys-
tem Select Switch to OFF, if so equipped.
Should overheating occur or the gas control valve fail to shut
off, shut off the manual equipment shutoff valve to the fur-
nace before shutting off the electrical supply.
Extended Shutdown
1. Set thermostat to lowest temperature setting or set thermo-
stat System Select Switch to OFF, if so equipped.
2. Turn Manual Equipment Shutoff Valve for furnace to OFF
position (at right angle or 90 ° to gas line).
3. Remove the burner compartment door by removing the two
(2) screws securing the door in front and lifting the door up
and outwards. Removing the door will expose the gas con-
trol valve switch.
4,
5.
Slide the gas control valve switch to OFF.
Turn OFF electric power to the furnace at the disconnect
switch or circuit breaker. (May be left ON for set-back type
thermostat with batteries, provided thermostat has system
select switch placed in the OFF position.)
6. Reinstall all doors.
0n\Off
Switch
Honeywell Gas Control Valve
Single Stage
OUTLET
INLET
Diagnostic Light
dwg 25-23-31a
Two Stage
Diagnostic
Light
OUTLET
0n\Off
Switch
INLET
25-22-49a
441 02 2010 04