Lennox GCS20-060, GCS16-024, GCS16-048, GCS20R-048, GCS20-030 User Manual

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See unit nameplate for manufacturer and address.
504,558M 8/2002 Supersedes 2/2002
WARNING
GCS16−024, 030, 036, 048, 060 GCS20−024, 030, 036, 048, 060
GCS20R−024, 030, 036, 042, 048, 060
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 vice agency or the gas supplier
READ ALL INSTRUCTIONS IN THIS MANUAL
FBR113270
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Installation and service must be per formed by a qualified installer, ser vice agency or the gas supplier.
AND RETAIN FOR FUTURE REFERENCE
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.
Litho U.S.A.
WARNING
WHAT TO DO IF YOU SMELL GAS:
S Do not try to light any appliance. S Extinguish any open flames.
S Do not touch any electrical switch; do not
use any phone in your building.
S Leave the building immediately. S Immediately call your gas supplier from a
neighbor’s phone. Follow the gas suppli er’s instructions.
S If you cannot reach your gas supplier, call
the fire department.
E2002
08/02
*2P0802*
504,558M
*P504558M*
GCS16, 20, and 20R Parts Arrangement
VENT CAP
COMBUSTION AIR INDUCER JUNCTION BOX
GAS
VALV E
BURNER
Safety
1− Keep unit area clear and free of combustible materi
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.
WARNING
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
WARNING
CONDENSER
COIL
COMPRESSOR
WARNING
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.
WARNING
Danger of explosion. Can cause injury or product or property damage. Should 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.
WARNING
Danger of explosion and fire. Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage.
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.
CAUTION
Label all wires prior to disconnection when servic ing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
Page 1
WARNING
Danger of electrical shock, explosion and fire. Improper servicing could result in dangerous operation, serious inujry, death or property damage.
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 on to re set ignition control.
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 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
Unit Operation − Continued
THERMOSTAT
HEAT COOL
50 60 70 80
10 15 2025 30
FAN
HEAT
OFF
COOLAUTO ON
FIGURE 1
A−Placing Unit In Heating Operation
WARNING
Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly.
1− If using electromechanical thermostat, set to the low
est setting.
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.
ON
OFF
GAS VALVE SHOWN IN OFF POSITION
WHITE RODGERS 36E GAS VALVE
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
MANIFOLD
NO
OFF
PRESSURE
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.
4Turn 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.
WARNING
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 combus tion air inducer for corrosion, deterioration or deposits of debris. Remove any obstructions or blockage.
Burner Flame
WARNING
Danger of explosion and fire. Can cause injury or product or property damage. Periodically inspect burner flame to en sure proper unit operation.
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 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.
Repair Parts Listing
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 )
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