See unit nameplate for manufacturer
and address.
504,558M
8/2002
Supersedes 2/2002
GCS16−024, 030, 036, 048, 060
GCS20−024, 030, 036, 048, 060
GCS20R−024, 030, 036, 042, 048, 060
WARNING
Improper installation, adjustment, alteration, serꢀ
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and serꢀ
vice must be performed by a qualified installer, serꢀ
vice agency or the gas supplier
READ ALL INSTRUCTIONS IN THIS MANUAL
AND RETAIN FOR FUTURE REFERENCE
Litho U.S.A.
E2002
FBR113270
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:
S Do not try to light any appliance.
S 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.
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 suppliꢀ
er’s instructions.
Installation and service must be perꢀ
formed by a qualified installer, serꢀ
vice agency or the gas supplier.
S If you cannot reach your gas supplier, call
the fire department.
08/02
504,558M
*2P0802*
*P504558M*
4− Remove heat access panel.
5− Honeywell VR8205 − Turn knob on gas valve clockꢀ
WARNING
Danger of electrical shock, explosion
and fire. Improper servicing could
result in dangerous operation, serious
inujry, death or property damage.
wise
wise
until it stops. Depress knob and turn clockꢀ
to OFF.
White Rodgers 36E − Turn knob on gas valve 180° eiꢀ
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.
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.
Gas Valve Operation (Figure 2)
7− Honeywell VR8205 − Turn knob on gas valve counterꢀ
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.
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.
This unit is equipped with an automatic spark ignition sysꢀ
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 temperꢀ
ature controls, shut main disconnect off and back on to reꢀ
set ignition control.
9− Turn on electrical power to unit. If using electroꢀmeꢀ
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
ON
50 60 70 80
10 15 2025 30
OFF
GAS VALVE SHOWN IN OFF POSITION
WHITE RODGERS 36E GAS VALVE
FAN
AUTO ON
HEAT
COOL
OFF
MANIFOLD
PRESSURE
ADJUSTMENT
SCREW
FIGURE 1
A−Placing Unit In Heating Operation
MANIFOLD
PRESSURE
OUTLET
NO
WARNING
OFF
Danger of explosion and fire. Can
cause injury or product or property
damage. You must follow these
instructions exactly.
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.
1− If using electroꢀmechanical thermostat, set to the lowꢀ
est setting.
2− Turn off all electrical power to furnace.
12− If lockout occurs, repeat steps 1 through 10.
3− This furnace is equipped with an ignition device which
automatically lights burner. Do not try to light burner
by hand.
13− If the furnace will not operate, follow the instructions
To Turn Off Gas To Unit" and call your service techniꢀ
cian or gas supplier.
Page 2
B−To Turn Off Gas To Unit
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 peꢀ
riodically during heating season using inspection port
provided on the burner access panel.
1− If using electroꢀmechanical thermostat, set to the lowꢀ
est setting.
2− Turn off all electrical power to unit if service is to be
performed.
3− Remove heat section access panel.
Service
4− Turn knob on Honeywell gas valve clockwise
it stops. Depress knob and turn clockwise
until
to OFF.
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.
Turn knob on White Rodgers 180° either way to off.
Do not force.
5− Replace heat section access panel.
A−Servicing Filter
Filters must be installed in the return air system. Filters
should be checked monthly and replaced when necesꢀ
sary. Take note of air flow direction marking on filter frame
when reinstalling filters.
WARNING
Danger of explosion. Can cause injury
or death. Do not attempt to light
manually. Unit has a direct spark
ignition system.
NOTE−Filters must be U.L.C. approved or equivalent for
use in Canada.
B−Lubrication
Flue Passage and Vent Inspection
All motors are lubricated at the factory. No further lubricaꢀ
tion is required.
Annually, before heating season, inspect combustion air
louvers, vent cap, heat exchanger, burners and combusꢀ
tion air inducer for corrosion, deterioration or deposits of
debris. Remove any obstructions or blockage.
Service Reminder
Call a qualified service technician if the unit is inoperaꢀ
tive. Before calling, always check the following to be
sure service is required:
Burner Flame
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.
WARNING
Danger of explosion and fire. Can cause
injury or product or property damage.
Periodically inspect burner flame to enꢀ
sure proper unit operation.
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
COOLING PARTS
ELECTRICAL PARTS
Heat Exchanger
Compressor
Compressor Contactor (K1)
Blower Relay (K3)
Combustion Air Inducer Assembly
Burner Sub−Assembly
Combustion Air Orifice
Gas Orifices
Compressor Run Capacitor
Expansion Valve
Blower Limit Relay (K20)
Combustion Air Inducer
Relay (K13)
Condenser Fan Motor
Condenser Fan Blade
Condenser Fan Run Capacitor
Condenser Fan Motor Mounting Bracket
Fan Grille
Ignition Electrode Assembly
Flame Sensor
Control Transformer
Ignition Control
Burner Gasket
Blower Delay Relay (K25 )
Gas Valve
Grille Retaining Nut
Indoor Blower Motor
Blower Motor Run Capacitor
Blower Wheel
Limit Control
Flue Cap
Vent Cap Gasket
Secondary Limit
Strainer
Roll−Out Switch
Distributor
Combustion Air Inducer Gaskets
Time Delay
Page 3
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