Operating Your Furnace - International comfort products N9MP1 User's Information Manual

User's Information Manual
Set the room thermostat slightly above room temperature. This will
automatically signal the furnace to start. The inducer motor will
start, and the hot surface igniter will have an orange glow. After
about 32 seconds (from the call for heat at the thermostat), the gas
valve permits gas to flow to the main burners where it is ignited.
When the flame is firmly established, the igniter shuts off. Hot
flames begin to warm the furnace's heat exchanger. After a time
delay of 30 seconds (45 seconds for low--stage on two--stage fur-
naces) the furnace blower is switched on.
NOTE: If the main burners fail to ignite, the furnace control system
will go through 3 more ignition cycles. Then, if burners fail to ignite,
the system will lockout. If lockout occurs, or the blower doesn't
come on -- shut down your furnace and call a Qualified Service
Agency for service.
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.

Operating Your Furnace

Keep the blower access door and all access panels in place except
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.
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to provide adequate combustion and
ventilation air could result in death 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 6 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 knob.
4. Rotate the gas control valve knob colckwise
See Figure 6.
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. Rotate the gas control valve knob counterclockwise < to
ON.
7. Reinstall all doors.
8. Turn ON all electrical power to the furnace.
441 02 2011 00
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 main burners.
Turning Off The Furnace
Set the thermostat to the lowest temperature setting or set System
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 furnace
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 control
valve knob.
4. 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.)
5. Rotate the gas control valve knob clockwise
See Figure 6
6. Reinstall all doors.
Figure 6
On\Off
Knob
Two Stage
>
to OFF.
On\Off
Knob
Honeywell Gas Control Valve
Single Stage
INLET
O N
O F F
25--24--94--1
INLET
O O
N N
O O F
O F F
>
to OFF.
OUTLET
OUTLET
7