Lennox International Inc. GSR21Q User's Manual
Contents
1. LEWWUX USER S INFORMATION MANUAL 1996 Lennox Industries Inc Dallas Texas aM GSR21Q amp V 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 may result causing property damage personal injury or death WHAT TO DO IF YOU SMELL GAS aoe Do not store or use gasoline or other e Do not try to light any appliance flammable vapors and liquids in the e Extinguish any open flames vicinity of this or any other appliance Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a formed by a qualified installer ser neighbor s phone Follow the gas suppli Installation and service must be per er s instructions e If you cannot reach your gas supplier call the fire department vice agency or the gas supplier Page 1 GSR21 Q amp V SERIES PARTS ARRANGEMENT Horizontal Application Shown ELECTRONIC IGNITION FLAME SENSOR HEAT EXCHANGER BLOWER VARIABLE SPEED BLOWER MO TOR USED ON GSR21V UNITS ONLY BLOWER PRESSURE SWITCH FILTER INTAKE CONNECTION EXHAUST CONNECTION FIGURE 1 FOR YOUR SAFETY READ BEFORE LIGHTING A WARNING Do not use this furnace if any part has been under water Immediately call a qualified service techni cian to inspect the furna2. 2 Turn off all electrical power to unit if service is to be performed See figure 4 3 Remove heat section access panel 4 On Robertshaw 7200 gas valve depress lever on gas control and move to OFF and release For White Rodgers 36E gas valves move switch to OFF 5 Replace unit access panel FOR UNIT TO OPERATE DISCONNECT SWITCH MUST BE IN ON POSITION TYPICAL FUSE DISCONNECT SWITCH BOX MOUNTED ON FURNACE FIGURE 4 Page 4 GAS PIPING DOWNFLOW APPLICATION MANUAL MAIN SHUT OFF VALVE GAS VALVE GROUND JOINT UNION GAS CONNECTOR GAS PIPING HORIZONTAL APPLICATION GROUND UNIT JOINT UNION REAR aaa MANUAL MAIN SHUT OFF VALVE Gas connector may be used for Canadian installation if acceptable by local authority having jurisdiction FIGURE 5 SERVICING FILTER Inspect and clean air filters each month Filters must be cleaned when dirty to assure proper furnace op eration and maintain efficiency A Cleaning Reusable Foam Filter 1 Turn off electrical power to furnace Remove blower access panel Wait for blower to stop Remove filter by sliding up and out of channel Wash filter with water and a mild detergent For in creased efficiency filter media should be sprayed with Filter Handicoater when dry Filter Handicoater is RP products No 418 and is available as Lennox part No P 8 5069 If replacement filters is needed use Lennox part no P 8 7831 for 20 x 25 508
3. 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 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 between the return air and the room where the furnace is installed Return air duct Must be properly attached and provide an airtight seal to the 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 annua
4. ends of ex haust and intake pipes 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 com bustion air from outside of the structure other gas appliances 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 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 distrib uted 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 pres sure 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 pow ered by or gives off heat from a combustion process in cluding lawn mowers automobiles and fireplaces has
5. GAS VALVE GAS VALVE SHOWN IN OFF POSITION FIGURE 2 1 Set thermostat to lowest setting See figure 3 2 Turn off all electrical power to furnace See figure 4 3 This appliance Is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand 4 Remove unit access panel 5 On Robertshaw 7200 gas valve depress lever on gas control and move to OFF and release For White Rodgers 36E gas valves move switch to OFF Do not force 6 Wait five 5 minutes to clear out any gas Smell for gas including near the floor If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instruc tions If you do not smell gas go to next step THERMOSTATS HEAT 0 15 ANE FIGURE 3 7 On Robertshaw 7200 gas valve depress lever on gas control and move to ON and release For White Rodgers 36E gas valves move switch to ON 8 Replace unit access panel 9 Turn on all electrical power to unit 10 Set thermostat to desired setting See figure 3 11 If the furnace will not operate follow the instructions To Turn Off Gas To Unit and call your service techni cian or gas supplier B To Turn Off Gas To Unit 1 Set thermostat to lowest setting See figure 3
6. ce and to replace any part of the control system and any gas control which has been under water 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 CAUTION Before attempting to perform any service or mainte nance turn the electrical power to unit OFF at dis connect switch BEFORE LIGHTING smell all around the appliance area for gas Be sure to smell next to the floor be cause some gas is heavier than air and will settle on the floor Page 2 A WARNING Do not set thermostat below 60 F 16 C in heating mode Setting thermostat below 60 16 C reduces the number of heating cycles Damage to the unit may occur that is not covered by the warranty Use only your hand to push in or move the gas control lever or switch Never use tools If the lever or switch will not push in or move by hand do not try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion 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 obstructair flow to unit Unit mustreceive an unobstructed flow of combustion and ventilat ing air Do not obstruct termination
7. eck the following to be sure service is required 1 Be sure electrical switches are ON 2 Check the room thermostat for proper setting 3 Replace any blown fuses or reset circuit breakers 4 Make sure gas valve is on 5 Blower access panel is in place 6 Air filter must be clean 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 e 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 unfamiliar noises Page 5 e If you smell any unusual odors your unit may be oper ating improperly For example units can give off unfa miliar odors if components are required to operate in abnormal conditions e Look for visible signs of a malfunctioning unit Exam ples include unusual amounts of condensate on win dows inside your house visibly burnt components or unusual dirt or rust accumulations on the vent pipe or in the unit e f you experience headache nausea fatigue or dizzi ness the cause could be exposure to carbon monox ide gas This is often misdiagnosed as the flu because symptoms are similar If you suffer from flu like symp toms that are exaggerated at home but seem to sub side while you are away from the house exposure to carbon monoxide could be the cause Your vigilance may pay off in early
8. l 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 LENNOX ONE LESS THING TO WORRY ABOUT EEE ee i O lM Page 6
9. 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 appliances Reliable detectors are available at reason able 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 nation al agencies and to operate safely when properly installed and maintained However the unit s performance can be greatly impacted by the individual installation and the op erating environment It is your responsibility to ensure that this appliance is maintained Proper maintenance is critical for your safety and the satisfactory operation of the product Lennox strongly recommends annual in spection and maintenance of this appliance Contact your independent Lennox dealer for an inspection by a qualified service technician Page 3 UNIT OPERATION This appliance does not have a pilot It is equipped with an ignition system which automatically lights the burner Do not try to light by hand A Gas Valve Operation A WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life Gas Valve Operation for Robertshaw and White Rodgers Valves Figures 2 and 5 ROBERTSHAW 7200 GAS VALVE GAS VALVE SELECTOR ARM IN OFF POSITION WHITE RODGERS 36E
10. x 635mm filter Reinstall filter Slide filter into top channel and drop into lower channel IMPORTANT Do not replace foam reusable filters with throw away type filters Replace blower access panel LUBRICATION Motors are pre lubricated for extended bearing life no further lubrication is required SERVICE At the beginning of each heating season the system should be checked as follows 1 Examine the termination ends of the intake and ex haust lines for obstructions or blockages 2 Check the intake and exhaust lines for holes sag ging or broken isolation hangers If a sag is found in either line raise the line and support it with an isola tion hanger Replace any damaged isolation hang ers 3 The return air duct connection should be sealed to the furnace casing and terminate outside the space containing the furnace 4 Check the physical support of the furnace It should be sound without sagging cracks gaps etc around the base so as to provide a seal between the support and the base 5 Check that there is no obvious signs of deterioration of the furnace 6 Inspect and clean condensate drain system for free flow of condensate IMPORTANT If a change in the sound level of the unit is detected or there is evidence of condensate leak age around the unit contact your Lennox service technician SERVICE REMINDER Call your Lennox service technician if the unit is inop erative Before calling always ch
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