GCES80 Installation Manual
19
• Circulator blower is energized on T1 speed. Electronic
air cleaner terminals are energized.
• Circulator blower runs, integrated control module
monitors safety circuits continuously.
• R and G thermostat contacts open, completing the call
for fan.
• Circulator blower is de-energized. Electronic air cleaner
terminals are de-energized.
• Furnace awaits the next call from thermostat.
Furnace must have a 115 VAC power supply properly con-
nected and grounded. Proper polarity must be maintained
for correct operation. An interlock switch prevents furnace
oper ation if the blower door is not in place. Keep the blower
access door in place except for inspection and maintenance.
This furnace is also equipped with a self-diagnosing elec-
tronic control module. In the event a furnace component is
not operating properly, the control module LED will ash on
and o in a factory-programmed sequence, depending on the
problem encountered. This light can be viewed through the
observation window in the blower access door. Refer to the
Troubleshooting Chart for further explanation of the fault codes
Purge gas lines of air prior to start-up. Do not purge lines into
an enclosed burner compartment.
Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector, or other
approved method. Verify that all required kits (propane gas,
high altitude, etc.) have been appropriately installed.
NOTE: An interlock switch prevents furnace oper ation if the
blower door is not in place. Keep the blower access doors in
place except for inspection and maintenance.
1. Close the manual gas shuto valve external to the
furnace.
2. Turn o the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner
by hand.
5. White-Rodgers valves Push the switch to the OFF
position.
6. Wait ve minutes then smell for gas. Be sure to check
near the oor, as some types of gas are heavier than
air.
7. If gas can be smelled following the ve minute waiting
peri od in Step 6, immediately follow the instructions on
Page 3 of this manual. If you do not smell gas after ve
minutes:
White-Rodgers valves : Push the switch to the ON
position.
8. Replace the door on the front of the furnace.
9. Open the manual gas valve external to the furnace.
10. Turn on the electrical power supply to the furnace.
11. Set the room thermostat to the desired temperature.
NOTE: There is an approximate 30 second delay between
thermostat energizing and burner ring.
1. Set the thermostat to lowest setting.
2. Turn o the electrical power supply to the furnace.
3. Remove the burner compartment door.
4. White-Rodgers valve : Push switch to the OFF position.
5. Close manual gas shuto valve external to the furnace.
6. Replace the door on the unit.
CAUTION
T
O
PREVENT
UNRELIABLE
OPERATION
OR
EQUIPMENT
DAMAGE
,
THE
INLET
GAS
SUPPLY
PRESSURE
MUST
BE
AS
SPECIFIED
ON
THE
UNIT
RATING
PLATE
WITH
ALL
OTHER
HOUSEHOLD
GAS
FIRED
APPLIANCES
OPERATING
.
HIGH VOLTAGE !
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
The line pressure supplied to the gas valve must be within
the range specied below. The supply pressure can be mea-
sured at the gas valve inlet pressure tap or at a hose tting
installed in the gas piping drip leg. The supply pressure must
be measured with the unit OFF. To measure inlet pressure,
use the following procedure.
NOTE: If measuring gas pressure at the drip leg or Honeywell
gas valve, a eld-supplied hose barb tting must be installed
prior to making the hose connection. If using the inlet pressure
tap on the White-Rodgers gas valve, then use the 36G/J Valve
Pressure Check Kit, Part No. 0151K00000S.