Table of Contents
Advertisement
129099-UUM-G-0909
If Furnace Fails to Operate Properly
1.
Check setting of thermostat - and position of HEAT/COOL switch if
air conditioning is installed. If a set-back type thermostat is
employed be sure that the thermostat is in the correct operating
mode.
2.
Check to see that electrical power is ON.
3.
Check to see that the knob or switch on the gas control valve is in
the full ON position.
4.
Make sure filters are clean, return grilles are not obstructed, and
supply registers are open.
5.
Be sure that furnace flue piping is open and unobstructed.
If the cause for the failure to operate is not obvious, do not attempt to
service the furnace yourself. Call a qualified service agency or your gas
supplier.
2. Examine Filter Door
4. Examine Burner Door
5. Remove Burner
Door to Examine
Furnace Base and
Air Conditioning
Coil Panels
FIGURE 3: Furnace Examination Checkpoints
HOW YOUR GAS FURNACE WORKS
Your furnace is a very easy appliance to take for granted. Season after
season, it sits there in your home, keeping you warm and comfortable.
For this reason, you may never have given much thought to the way
your furnace operates. In order to get the safest and most efficient oper-
ation from your furnace, you should understand how your furnace does
its job.
When you set your thermostat to provide more heat in your home, you
are starting the heating cycle of the furnace. First, the inducer motor
starts to purge the heat exchanger of any remaining gases. Next, the
hot surface ignitor glows and after a warm-up period the gas valve
opens and ignition occurs. A short time later, the blower starts and dis-
tributes the warm air throughout the home. When the temperature set-
ting on your thermostat is reached, the gas valve closes, the main
burner is turned off, and the blower continues to run until the remaining
warm air in the system is distributed. When the blower stops, the heat-
ing cycle has ended.
IF FURNACE FAILS TO OPERATE PROPERLY
1.
Check setting of thermostat - and position of heat/cool switch if air
conditioning is installed. If a set-back type thermostat is employed
be sure that the thermostat is in the correct operating mode.
2.
Check to see that electrical power is "ON".
3.
Check to see that the lever or switch on the gas control valve is in
the full "ON" position.
4
1. Examine Vent Pipe
3. Remove Filter
Door to Examine
Combustion Air Pipe
7. Remove Burner
Door to Examine
Burner Flame
4.
Make sure filters are clean, return grilles are not obstructed, and
supply registers are open.
5.
Be sure that furnace flue piping is open and unobstructed.
When You Call For Service Assistance
Very often time can be saved if you will give the service agency the
MODEL and SERIAL NUMBER of your furnace. This will enable him to
determine the specific components used, and perhaps to better identify
the possible problem and be better prepared if a service call is required.
To Contact Your Serviceman
(fill in)
COMPANY:___________________________________________
ADDRESS: __________________________________________
TELPHONE:__________________________________________
All appliances need maintenance by serviceman at the beginning of
each heating season. Call your nearest authorized service technician
to:
1.
Replace filters. Clean all lint and dust from around furnace.
2.
Remove fan and clean all dust and lint from unit with stiff bristle
brush.
3.
Inspect combustion chamber, the transition into the blower com-
partment, flue collar, and roof jack.
4.
Check the gas valve and line connections for leaks.
5.
Make any adjustments necessary for good operation.
NOTE: The coil panel provides a good removable access for inspecting
inside the furnace casing. Smoke or reflected light inside the
casing indicates the presence of leaks in the heat exchanger.
START-UP AND SHUTDOWN INSTRUCTIONS
Read the Instructions Below Before Trying to Start the
Furnace
If you do not follow these instructions exactly, a fire or explo-
sion may result causing property damage, personal injury,
and/or loss of life.
1.
This appliance does not have a pilot. It is equipped with an ignition
device which automatically lights the burner. Do not try to light the
burner by hand.
2.
BEFORE OPERATING; smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
3.
Use only your hand to push the gas control switch to the "on" posi-
tion. Never use tools. If the switch will not operate by hand, don't
try to repair it, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
4.
Do not use this appliance if any part has been under water. Imme-
diately call a qualified service technician to inspect the appliance
and to replace any part of the control system and any gas control,
which has been under water.
Operating Instructions:
1.
STOP! Read the safety information above.
2.
Set the thermostat to the lowest setting.
3.
Turn off all electric power to the appliance.
4.
Remove furnace door.
5.
Move gas control switch to the "OFF" position. Do not force. See
Figure 4.
Johnson Controls Unitary Products
Hide quick links:
Advertisement
Table of Contents
