Lennox International Inc. GCS16-030 User's Manual
Contents
1. i USER S INFORMATION ee MANUAL GCS16 024 030 036 048 060 GCS20 024 030 036 048 060 GCS20R 024 030 036 042 048 060 AWARNING Improper installation adjustment alteration ser vice or maintenance can cause property damage personal injury or loss of life Installation and ser vice must be performed by a qualified installer ser Py vice agency or the gas supplier Cc Technical READ ALL INSTRUCTIONS IN THIS MANUAL Tiie FBR113270 AND RETAIN FOR FUTURE REFERENCE o e 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 Do not try to light any appliance Do not store or use gasoline or other Extinguish any open flames flammable vapors and liquids in the Do not touch any electrical switch do not vicinity of this or any other appliance use any phone in your building Leave the building immediately Installation and service must be per Immediately call your gas supplier from a formed by a qualified installer ser Nneighbor s phone Follow the gas suppli vice agency or the gas supplier er s instructions e If you cannot reach your gas supplier call the fire department 08 02 504 558M MAAN UTT UN A GCS 16 20 and 20R Parts Arrangement VENT CAP COMBUSTION AIR INDUCER BURNER Safety 1 Keep unit area clear and free of combustible ma2. d the gas supply fail to shut off or if overheating occurs shut off the gas valve to the furnace before shutting off the electrical supply AWARNING Danger of explosion and fire Failure to follow safety warnings exactly could result in dangerous operation serious injury death or property damage ACAUTION Label all wires prior to disconnection when servic ing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing AWARNING Danger of electrical shock explosion and fire Improper servicing could result in dangerous operation serious inujry death or property damage W Unit Operation FOR YOUR SAFETY READ BEFORE LIGHTING BEFORE LIGHTING smell all around the furnace area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor Use only your hand to push in or turn the gas control knob Never use tools If the knob will not push in or turn by hand do not try to repair it call a qualified service technician Force or attempted repair may result in a fire or explosion This unit is equipped with an automatic spark ignition sys tem There is no pilot In case of a safety shutdown move thermostat switch to OFF and return the thermostat switch to HEAT Electro mechanical thermostat is shown in figure 1 On logic units and units with electronic temper ature controls shut main disconnect off and back
3. ombus tion air inducer for corrosion deterioration or deposits of debris Remove any obstructions or blockage Burner Flame AWARNING injury or product or property damage Periodically inspect burner flame to en Danger of explosion and fire Can cause sure proper unit operation Repair Parts Listing The primary air is permanently set for normal operation The flame will be basically blue with some clear yellow streaking in the end of the flame Inspect burner flame pe riodically during heating season using inspection port provided on the burner access panel Service To maintain efficiency and longevity your equipment must be serviced yearly by a qualified service technician Failure to provide proof of proper service can void the warranty A Servicing Filter Filters must be installed in the return air system Filters should be checked monthly and replaced when neces sary Take note of air flow direction marking on filter frame when reinstalling filters NOTE Filters must be U L C approved or equivalent for use in Canada B Lubrication All motors are lubricated at the factory No further lubrica tion is required Service Reminder Call a qualified service technician if the unit is inopera tive Before calling always check the following to be sure service is required 1 Be sure electrical disconnect switches are ON 2 Check room thermostat for proper setting 3 Replace any blown fuses
4. on to re set ignition control Unit Operation Continued THERMOSTAT near 50 60 70 80 10 15 202530 AWM I I I FAN alto ON HEAT ote c FIGURE 1 A Placing Unit In Heating Operation AWARNING W Danger of explosion and fire Can cause injury or product or property You must follow these 1 If using electro mechanical thermostat set to the low est setting damage instructions exactly 2 Turn off all electrical power to furnace 3 This furnace is equipped with an ignition device which automatically lights burner Do not try to light burner by hand 4 Remove heat access panel 5 Honeywell VR8205 Turn knob on gas valve clock wise until it stops Depress knob and turn clock wise to OFF White Rodgers 36E Turn knob on gas valve 180 ei ther way to OFF 6 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from your neighbor s phone Follow the gas supplier s instructions If you don t smell gas go to next step Gas Valve Operation Figure 2 7 Honeywell VR8205 Turn knob on gas valve counter clockwise until it stops Allow knob to pop up and continue counterclockwise to ON position White Rodgers 36E Turn knob on valve 180 either way to ON 8 Replace heat section access panel 9 Turn on electrical power to unit If using electro me chanical
5. or reset circuit breakers 4 Gas valve should be ON 5 Air filters should not be plugged limiting air flow 6 Make sure all access panels are in place The following repair parts are available When ordering parts include the complete model number and serial number listed on the unit rating plate e g GCS20 024 50 1P HEATING PARTS Heat Exchanger Combustion Air Inducer Assembly Burner Sub Assembly Combustion Air Orifice Gas Orifices Ignition Electrode Assembly Flame Sensor Burner Gasket Gas Valve Limit Control Flue Cap Vent Cap Gasket Secondary Limit Roll Out Switch Combustion Air Inducer Gaskets COOLING PARTS Compressor Compressor Run Capacitor Expansion Valve Condenser Fan Motor Condenser Fan Blade Condenser Fan Run Capacitor Condenser Fan Motor Mounting Bracket Fan Grille Grille Retaining Nut Indoor Blower Motor Blower Motor Run Capacitor Blower Wheel Strainer Distributor Time Delay Page 3 ELECTRICAL PARTS Compressor Contactor K1 Blower Relay K3 Blower Limit Relay K20 Combustion Air Inducer Relay K13 Control Transformer Ignition Control Blower Delay Relay K25
6. teri als gasoline and other flammable vapors and liquids 2 Inspect return air duct to ensure duct is sealed to the unit and terminates outside the space contain ing appliance AWARNING Product contains fiberglass wool Disturbing the insulation in this product during installation maintenance or repair will expose you to fiberglass wool Breathing this may cause lung cancer Fiberglass wool is known to the State of California to cause cancer 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 P O Box 799900 Dallas TX 75379 9900 AWARNING Do not use this furnace if any part has been under water A flood damaged furnace is extremely dan gerous Attempts to use the furnace can result in fire or explosion A qualified service agency should be contacted to inspect the furnace and to replace all gas controls control system parts electrical parts that have been wet or the furnace if deemed necessary Page 1 JUNCTION BOX AWARNING Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies AWARNING Danger of explosion Can cause injury or product or property damage Shoul
7. thermostat set to desired setting 10 The combustion air inducer s will start The burners will light within 40 seconds HONEYWELL VR8205 SERIES GAS VALVE GAS VALVE SHOWN IN OFF POSITION WHITE RODGERS 36E GAS VALVE o MANIFOLD PRESSURE ADJUSTMENT SCREW MANIFOLD PRESSURE Pa OUTLET FIGURE 2 11 If unit does not light first time gas line not fully purged it will attempt up to two more ignitions before locking out 12 If lockout occurs repeat steps 1 through 10 13 If the furnace will not operate follow the instructions To Turn Off Gas To Unit and call your service techni cian or gas supplier Page 2 B To Turn Off Gas To Unit 1 If using electro mechanical thermostat set to the low est setting 2 Turn off all electrical power to unit if service is to be performed 3 Remove heat section access panel 4 Turn knob on Honeywell gas valve clockwise until it stops Depress knob and turn clockwise to OFF Turn knob on White Rodgers 180 either way to off Do not force 5 Replace heat section access panel AWARNING Danger of explosion Can cause injury or death Do not attempt to light manually Unit has a direct spark ignition system Flue Passage and Vent Inspection Annually before heating season inspect combustion air louvers vent cap heat exchanger burners and c
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