Lennox International Inc Furnace GHR32 User Manual

E2001 Lennox Industries Inc.  
Dallas, Texas, USA  
504,392M  
7/2001  
Supersedes 504,117M  
GHR32  
SERIES  
GAS FURNACE  
Litho U.S.A.  
WARNING  
If the information in this manual is not  
followed exactly, a fire or explosion  
may result causing property damage,  
personal injury or loss of life.  
WHAT TO DO IF YOU SMELL GAS:  
D Do not try to light any appliance.  
D Extinguish any open flames.  
Do not store or use gasoline or other  
flammable vapors and liquids in the  
vicinity of this or any other appliance.  
D Do not touch any electrical switch; do not  
use any phone in your building.  
D Immediately call your gas supplier from a  
neighbor's phone. Follow the gas suppliĆ  
er's instructions.  
Installation and service must be perĆ  
formed by a qualified installer, service  
agency or the gas supplier.  
D If you cannot reach your gas supplier, call  
the fire department.  
07/01  
504,392M  
*2P0701*  
*P504392M*  
Page 1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
air is drawn from a room, a negative pressure is  
created in the room.  
IMPORTANT  
If a gas appliance is operating in a room with negative  
pressure, the flue products can be pulled back down  
the vent pipe and into the room. This reverse flow of  
the flue gas may result in incomplete combustion and  
the formation of carbon monoxide gas. This toxic gas  
might then be distributed through the house by the furĆ  
nace duct system.  
Any additions, changes, or conversions required  
in order for the appliance to satisfactorily meet the  
application needs must be made by a Lennox serĆ  
vice technician using factory specified and apĆ  
proved parts.  
WARNING  
If overheating occurs or if gas supply fails to shut off,  
shut off the manual gas valve to the appliance before  
shutting off electrical supply.  
WARNING  
Carbon monoxide gas is invisible, odorless, and toxic.  
Your furnace is a gas appliance. It is critical that the gas  
supplied to the unit be completely burned to avoid the proĆ  
duction of carbon monoxide gas. Complete combustion of  
the gas requires, but is not limited to, correct gas pressure  
and gas flow rate, adequate combustion, air, and proper  
venting.  
Lighting Information & Operation  
WARNING  
If you do not follow these instructions exactly, a fire  
or explosion may result causing property damage,  
personal injury or death.  
Exposure to this gas can cause personal injury and even  
death to all occupants, including pets. Any item that is  
powered by or gives off heat from a combustion process  
(including lawn mowers, automobiles, and fireplaces) has  
the potential to produce carbon monoxide gas. Because  
of this, Lennox recommends the use of a carbon monoxĆ  
ide detector in your home, even if you do not own gas apĆ  
pliances. Reliable detectors are available at reasonable  
retail prices. Contact your independent Lennox dealer for  
more details about this investment in your safety.  
BEFORE LIGHTING 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.  
The unit is equipped with a gas control knob. Use only your  
hand to turn the gas control knob. Never use tools. If the  
knob will not push in or turn, do not try to repair it. Call a  
qualified service technician. Force or attempted repair may  
result in a fire or explosion.  
Your furnace is designed to meet standards set by naĆ  
tional agencies, and to operate safely when properly  
installed and maintained. However, the unit's perforĆ  
mance can be greatly impacted by the individual installaĆ  
tion and the operating environment. It is your responsibilĆ  
ity to ensure that this appliance is maintained. Proper  
maintenance is critical for your safety and the satisfactoĆ  
ry operation of the product. Lennox strongly recomĆ  
mends annual inspection and maintenance of this apĆ  
pliance. Contact your independent Lennox dealer for an  
inspection by a qualified service technician.  
Placing the GHR32 furnace into operation:  
GHR32 units are equipped with a SureLightt ignition sysĆ  
tem. Do not attempt to manually light burners on these furĆ  
naces. Each time the thermostat calls for heat, the burnĆ  
ers will be automatically lit. The ignitor does not get hot  
when there is no call for heat on units with the SureLightt  
ignition system.  
Operating the Gas Valve (Figure 3 and 4)  
1 - STOP! Read the safety information at the beginning of  
this section.  
2 - Set thermostat to its lowest setting. See figure 2.  
WARNING  
Do not use this furnace if any part has been underwaĆ  
ter. Immediately call a qualified service technician to  
inspect the furnace and to replace any part of the  
control system and any gas control which has been  
under water.  
THERMOSTATS  
CAUTION  
Before attempting to perform any service or mainteĆ  
nance, turn the electrical power to unit OFF at the  
disconnect switch.  
Figure 2  
Page 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
3 - Turn off all electrical power to the unit.  
4 - This unit is equipped with an ignition device which auĆ  
tomatically lights the burners. Do not try to light it by  
hand.  
BACK FILTER CLIP  
CABINET  
5 - Remove the unit access panel.  
6 - Turn gas valve knob to OFF. See figure 3.  
FILTER  
FILTER  
CLIP  
HONEYWELL VR8205 Series Gas Valve  
CABINET  
high fire adjusting screw  
(under cap)  
SIDE FILTER  
CLIP DETAIL  
manifold  
pressure  
tap  
FILTER  
Press up on side filter clip to  
release filter  
(One on each side of cabinet)  
FILTER  
CLIP  
low fire  
adjusting screw  
(under cap)  
Figure 4  
inlet pressure tap  
Gas Valve Shown In OFF Position  
Cleaning Filter  
1 - Turn off electric power to the unit.  
2 - Remove blower access panel.  
Figure 3  
7 - Wait five (5) minutes to clear out any gas. If you then  
smell gas, STOP! Immediately call your gas supplier  
from a neighbor's phone. Follow the gas supplier's inĆ  
structions. If you do not smell gas go to next step.  
3 - Remove filter by pressing side filter clips and pulling  
filter up and out.  
4 - Clean filter with cold water and a mild soap. Direct waĆ  
ter through filter in the opposite direction of air flow.  
Remove all soap residue.  
8 - Turn gas valve knob to ON. Do not force the knob.  
9 - Replace the unit access panel.  
5 - Allow the filter to dry, then spray with Filter HandicoatĆ  
er (P-8-5069) prior to reinstallation. This spray is availĆ  
able from your Lennox dealer.  
10 - Turn on all electrical power to the unit.  
11 - Set thermostat to desired setting.  
NOTE - When the unit is first started, steps 1 through  
11 may need to be repeated to purge air from pilot line.  
6 - Replace the filter in the blower compartment under the  
rear filter clip. Press on filter sides. The filter clips flex,  
allowing filter to snap into place.  
12 - If the appliance still will not operate, follow the instrucĆ  
tions Turning Off Gas to the Unit" and call your service  
technician or gas supplier.  
7 - Replace the blower access panel.  
Turning Off Gas to the Unit  
WARNING  
1 - Set thermostat to lowest setting.  
2 - Turn off all the electrical power to unit if service is to be  
performed.  
Blower door must be securely in place when blower  
and burners are operating. Gas fumes, which could  
contain carbon monoxide, can be drawn into living  
space resulting in personal injury or death.  
3 - Remove the unit access panel.  
4 - Turn gas valve knob to OFF. Do not force the knob.  
5 - Replace the unit access panel.  
Seasonal Inspections  
A qualified service technician should inspect the complete  
system each season (heating and cooling). The following  
maintenance procedures should be conducted by a  
qualified service technician. Do not attempt to service  
the unit in any way.  
Filters  
A filter must be in place anytime the unit is operating. The  
filter may be located in the unit or installed in a return air  
grille. Ask your dealer to show you the filter location. The  
filter should be inspected monthly and cleaned when necĆ  
essary to assure proper that the furnace operates properly.  
During a seasonal check the service technician will inspect  
the indoor blower and the burner flames along with the  
venting system.  
Filters used inside the GHR32 series units are available  
from Lennox and must be ordered separately. These foam  
filters may be cleaned for reuse. If the filters need to be reĆ  
placed, order Lennox part #31J81 for 14 X 25 inch filters for  
the GHR32Q-50, -75 and GHR32V-75. Number P-8-7831  
is for 20 X 25 inch filters which are used with the GHR32Q,  
and V-100 and the GHR32Q-120 units. See figure 4 for reĆ  
moving the filter from the unit. Use the following procedure  
to clean the filter.  
Venting System  
Annually (before heating season) inspect furnace venting  
system, heat exchanger, and burners for corrosion, deteriĆ  
oration, or deposits of debris. Remove any obstructions.  
Inspect furnace venting system to make sure it is in place,  
physically sound, and without holes or blockage. Vent conĆ  
nector must be in correct position, sloped upward and be  
physically sound without holes.  
Page 4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Inspect furnace return air duct connection to ensure duct is  
sealed to the furnace and terminates outside the space  
containing the furnace.  
D If you smell any unusual odors, your unit may be operatĆ  
ing improperly. For example, units can give off unfamilĆ  
iar odors if components are required to operate in abĆ  
normal conditions.  
Inspect the physical support of the furnace to guarantee  
that it is sound without sagging, cracks or gaps around  
base and it maintains seal between base and support.  
D Look for visible signs of a malfunctioning unit. Examples  
include unusual amounts of condensate on windows inĆ  
side your house, visibly burnt components, or unusual  
accumulation of rust in the unit.  
Inspect and clean the condensate traps and drain.  
Blower  
D If you experience headache, nausea, fatigue, or dizziĆ  
ness, the cause could be exposure to carbon monoxide  
gas. This is often misdiagnosed as the flu because  
symptoms are similar. If you suffer from flu-like sympĆ  
toms that are exaggerated at home, but seem to subĆ  
side while you are away from the house, exposure to  
carbon monoxide could be the cause.  
Check and clean blower wheel for any debris. Blower moĆ  
tor is pre-lubricated for extended bearing life. No further luĆ  
brication is needed.  
Burner Flame  
Set thermostat to call for heat. Allow unit to operate for a  
few minutes to establish normal burning conditions. Check  
burner flame. Flame should be predominantly blue and  
strong in appearance.  
Your vigilance may pay off in early detection of a problem  
before either personal injury or property damage occurs.  
Do not hesitate to contact a qualified service technician as  
an investment in your well being.  
CAUTION  
Periodically look through the flame sight glass to  
check the burner flame.  
Planned Service  
You should expect a service technician to check the followĆ  
ing items during an annual inspection. Power to the unit  
must be shut off for the service technician's safety.  
Burners- Must be inspected for rust, dirt, or signs of water.  
Vent pipe - Must be inspected for dirt, damaged or sagging  
unsupported pipe, or disconnected joints.  
Unit appearance - Must be inspected for rust, dirt, signs  
of water, and burnt or damaged wires components.  
Blower access door - Must be properly in place and proĆ  
vide a seal between the return air and the room where the  
furnace is installed.  
Contact your Lennox dealer for a periodic unit inspection  
by a qualified service technician.  
Service Reminder  
Call your Lennox service technician if unit is inoperative.  
Before calling, always check the following to be sure serĆ  
vice is required:  
1 - Check that electrical disconnect switches are ON.  
2 - Check room thermostat for proper setting.  
3 - Replace any blown fuses or reset circuit breakers.  
4 - Gas valve should be ON.  
Return air duct - Must be properly attached and provide  
an airtight seal to unit.  
5 - Air filter should not be plugged limiting air flow.  
6 - Is gas turned on at meter?  
Operating performance - Unit must be observed during  
operation to monitor proper performance of the unit and the  
vent system.  
Combustion gases - Flue products must be analyzed and  
compared to the unit specifications.  
Problems detected during the inspection may make it necĆ  
essary to temporarily shut down the furnace until the items  
can be repaired or replaced.  
7 - Is manual main shut-off valve open?  
Safety Precautions  
If you discover any of the following, shut down your  
unit, and contact an independent Lennox dealer for an  
inspection by a qualified technician.  
Pay attention to your furnace. Situations can arise beĆ  
tween annual furnace inspections that may result in unsafe  
operation. For instance, items innocently stored next to the  
air inlet may obstruct the combustion air supply. This could  
cause incomplete combustion and the production of carĆ  
bon monoxide gas.  
D If you repeatedly hear any new or unfamiliar sounds  
while your unit is operating, there may be a problem. For  
example, poorly performing burners can produce unfaĆ  
miliar noises.  
Page 5  
Download from Www.Somanuals.com. All Manuals Search And Download.  

La Crosse Technology Portable Radio WD 3106UR B User Manual
LG Electronics Cell Phone B2050 User Manual
Liebert Welding System gxt2u User Manual
Lumens Technology Webcam VC G50 User Manual
Mackie DJ Equipment U420D User Manual
Magellan GPS Receiver 750M User Manual
Magnavox Bluetooth Headset MBP5320F User Manual
Metra Electronics Automobile Accessories 99 6510 User Manual
Metra Electronics Automobile Accessories 99 7952 User Manual
Metz Digital Camera 36 AF 4 N User Manual