Lennox International Inc. GHR26 User's Manual
Contents
1. GAS VALVE SHOWN IN OFF POSITION WHITE RODGERS 36E GAS VALVE J o 07 GAS VALVE SHOWN IN OFF POSITION 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 neighbors phone Follow the gas suppliers instruc tions If you do not smell gas go to next step 8 For Honeywell VR8205 gas valves turn knob on gas valve counterclockwise 4 to ON For White Rodgers 36E gas valves move switch to ON Do not force 9 Replace unit access panel 10 Turn on all electrical power to unit 11 Set thermostat to desired setting NOTE When unit is first started steos 1 through 11 may need to be repeated to purge air from pilot line D If the appliance still will not operate follow the instructions To Turn Off Gas To Unit and call your service technician or gas supplier To Turn Off Gas To Unit 1 Set thermostat to lowest setting 2 Turn off all electrical power to unit if service is to be per formed 3 Remove unit access panel 4 For Honeywell VR8205 gas valves turn knob on gas valve counterclockwise 4 to OFF For White Rodgers 36E gas valves move switch to OFF Do not force 5 Replace unit access panel A filter must be in place anytime the unit is operating The filter may be located in the unit or installed in a return a2. LEWWUX USER S INFORMATION MANUAL 1997 Lennox Industries Inc Dallas Texas USA _ GHR26 SERIES GAS FURNACE TE Technical Publications Litho U S A A WARNING If the information in this manual is not followed exactly a fire or explosion E a may result causing property damage _ APPROVED personal injury or loss of life E WHAT TO DO IF YOU SMELL GAS Do not store or use gasoline or other Do notty to light any appliance flammable vapors and liquids in the e Extinguish any open flames vicinity of this or any other appliance e Do not touch any electrical switch do not use any phone in your building Installation and service must be per Immediately call your gas supplier from a formed by a qualified installer service neighbor s phone Follow the gas supplier s instructions e If you cannot reach your gas supplier call the fire department agency or the gas supplier Page 1 GHR26 Parts Identification Downflow Application Shown CABINET BLOWER MOTOR COMBUSTION AIR PROVING PRESSURE SWITCH DuralokPlus HEAT EXCHANGER ASSEMBLY EXHAUST PIPE CONNECTION CONDENSATE TRAP CONNECTION BURNER BOX A WARNING Product contains fiberglass wool Disturbing the insulation in this product during installation maintenance or repair will expose you to fiberglass wool dust Breathing this may cause lung cancer Fiberglass wool is known to the State of C
3. are operating Gas fumes which could contain carbon monoxide can be drawn into living space resulting in personal injury or death Seasonal Inspections A qualified service technician should inspect the complete sys tem each season heating and cooling The following mainte nance procedures should be conducted by a qualified service technician Do not attempt to service the unit in any way Page 4 During a seasonal check the service technician will inspect the indoor blower the pilot and burner flames along with the vent ing system Venting System Annually before heating season inspect furnace venting sys tem heat exchanger burners and pilot for corrosion deteriora tion 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 connec tor must be in correct position sloped upward and be physical ly sound without holes Inspect furnace return air duct connection to ensure duct is sealed to the furnace and terminates outside the space con taining the furnace 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 Inspect and clean the condensate traps and drain Blower Check and clean blower wheel for any debris Blower motor is pre lubricated for extended bearing life No further lubrication is nee
4. gas appliance is operating ina 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 furnace duct system Your furnace is a gas appliance It is critical that the gas supplied to the unit be completely burned to avoid the pro 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 A WARNING Carbon monoxide gas is invisible odorless and toxic Exposure to this gas can cause personal injury and even death to all occupants including pets Any item that is Page 2 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 monox ide detector in your home even if you do not own gas ap pliances Reliable detectors are available at reasonable retail prices Contact your independent Lennox dealer for more details about this investment in your safety Your furnace is designed to meet standards set by na tional agencies and to operate safely when properly installed and maintained However the units perfor mance can be greatly impact
5. alifornia to cause cancer BURNERS Fiberglass wool may also cause respiratory skin and eye irritation To reduce exposure to this substance or for further information consult material safety data sheets available from address shown below or contact your supervisor Lennox Industries Inc P O Box 799900 Dallas TX 75379 9900 Important Directions 1 Keep the furnace area clear and free of combustible material gasoline and other flammable vapors and liquids If installed in an insulated area furnace must be kept free of insulating material Insulating material may be combustible 2 DONOT obstruct air flow to unit Unit must receive an unobstructed flow of combustion and ventilating air we FILTER TOP CAP BLOWER ACCESS DOOR CONTROL BOX INTEGRATED IGNITION BLOWER CONTROL DOOR INTERLOCK SWITCH COMBUSTION AIR BLOWER GAS VALVE FRESH AIR INTAKE CONNECTION HEATING ACCESS PANEL FLAME SIGHT GLASS 3 DO NOT store chlorine or fluorine products near unit or introduce these products into the combustion air These products can cause furnace corrosion 4 DO NOT draw the return air from a room where another gas appliance ie a water heater is installed Even though this furnace draws its combus tion air from outside of the structure other gas ap pliances that share a utility room may not When return air is drawn from a room a negative pressure is created in the room If a
6. ded A CAUTION Using flame sight glass check burner flame peri odically to ensure proper operation Burner Flame Set thermostat to call for heat Allow unit to operate for a few minutes to establish normal burning conditions Check burner flame by observation Flame should be predomi nantly blue and strong in appearance 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 Be fore calling always check the following to be sure service 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 5 Air filter should not be plugged limiting air flow 6 Is gas turned on at meter 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 in spection by a qualified technician e If you repeatedly hear any new or unfamiliar sounds while your unit is operating there may be a problem For exam ple poorly performing burners can produce unfamiliar noises If you smell any unusual odors your unit may be operating improperly For example units can give off unfamiliar odors if components are required to operate in abnormal conditions Look for visible signs o
7. ed by the individual installa tion and the operating environment It is your responsibil ity to ensure that this appliance is maintained Proper maintenance is critical for your safety and the satisfacto ry operation of the product Lennox strongly recom mends annual inspection and maintenance of this ap pliance Contact your independent Lennox dealer for an inspection by a qualified service technician A 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 A WARNING Do not use this furnace if any part has been underwa 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 A IMPORTANT Any additions changes or conversions required in order for the appliance to satisfactorily meet the application needs must be made by a Lennox ser vice technician using factory specified and ap proved parts A CAUTION Before attempting to perform any service or mainte nance turn the electrical power to unit OFF at the disconnect switch Lighting Information amp Operation A WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or death BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor because
8. f a malfunctioning unit Examples include unusual amounts of condensate on windows in side your house visibly burnt components or unusual dirt or rust accumulations on the vent pipe or in the unit If you experience headache nausea fatigue or dizzi ness the cause could be exposure to carbon monoxide gas This is often misdiagnosed as the flu because symp toms are similar If you suffer from flu like symptoms that are exaggerated at home but seem to subside while you are away from the house exposure to carbon monoxide could be the cause Your vigilance may pay off in early detection of a problem be fore either personal injury or property damage occurs Do not hesitate to contact a qualified service technician as an invest ment in your well being Planned Service You should expect a service technician to check the following items during an annual inspection Power to the unit must be shut off for the service technician s safety Fresh air grilles and louvers on the unit and in the room where the furnace is installed Must be open and unob structed to provide combustion air Burners Must be inspected for rust dirt or signs of water Vent pipe Must be inspected for dirt signs of water dam aged or sagging unsupported pipe or disconnected joints Unit appearance Must be inspected for rust dirt signs of water burnt or damaged wires or components Blower access door Must be properly in place and provide a seal bet
9. ir grille Ask your dealer to show you the filter location The filter should be inspected monthly and cleaned when nec essary to assure proper furnace operation Filters used inside the GHR26 series unit are available from Lennox and must be ordered separately These foam filters may be cleaned for reuse If replacement is necessary order Lennox part no 31J81 for 14 X 25 inch filter for GHR26Q2 50 and 75 and P 8 7831 for 20 X 25 inch filter for all sizes of GHR26 100 and 125 units See figure 4 for removing filter from unit Use the following procedure to clean filter BACK FILTER CLIP CABINET FILTER CLIP CABINET SIDE FILTER CLIP DETAIL FILTER Press up on side filter clip to release filter One on each side of cabinet FIGURE 4 Cleaning Filter 1 Turn off electric power to furnace 2 Remove blower access panel 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 water through filter in the opposite direction of air flow Remove all soap residue 5 Allow filter to dry then spray with filter handicoater P 8 5069 available from your Lennox dealer prior to re installation 6 Replace filter in blower compartment under rear filter clip Press on filter sides Filter clips flex allowing filter to snap into place 7 Replace blower access panel A WARNING Blower door must be securely in place when blower and burners
10. some gas is heavier than air and will settle on the floor Unit may be equipped with either a gas control knob or le ver Use only your hand to push in or turn the gas control knob or move the gas control lever Never use tools If the knob will not push in or turn or if lever will not move by hand do not try to repair it call a qualified service techni cian Force or attempted repair may result in a fire or ex plosion To place GHR26 furnace into operation GHR26 units are equipped with a SureLight ignition sys tem Do not attempt to manually light burners on these fur naces Each time thermostat calls for heat the burners will be automatically lit The ignitor does not get hot when there is no call for heat on units with SureLight ignition sys tem Gas Valve Operation Figures 1 STOP Read the safety information at the beginning of this section 2 Set thermostat to lowest setting See figure 2 THERMOSTATS wn jj T m o EE Co 50 10 Nd FIGURE 2 3 Turn off all electrical power to appliance 4 This appliance is equipped with an ignition device which automatically lights the burners Do not try to light by hand 5 Remove unit access panel 6 On Honeywell VR8205 gas valves turn knob on gas valve clockwiseg to OFF For White Rodgers 36E gas valves move switch to OFF Do not force See fig ure 3 Page 3 HONEYWELL VR8205 SERIES GAS VALVE
11. ween the return air and the room where the furnace is installed Return air duct Must be properly attached and provide an airtight seal to unit Operating performance Unit must be observed during op eration 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 neces sary to temporarily shut down the furnace until the items can be repaired or replaced Pay attention to your furnace Situations can arise be tween annual furnace inspections that may result in unsafe operation For instance items innocently stored next to the furnace may obstruct the combustion air supply This could cause incomplete combustion and the production of carbon monoxide gas Page 5
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