8
RESET AFTER CONTROL LOCK-OUT
If ignition has not been achieved for any reason after three
ignition cycles, the electronic control module will lock-out
the furnace. Ignition is no longer attempted. The control's
diagnostic light will then repeatedly flash once and then
pause. When this occurs, it may be necessary to reset the
control by turning the thermostat setting below room tem-
perature for thirty seconds and then returning the setting to
the desired temperature. The control may also be reset
after a lock-out by turning off the electrical disconnect
switch to the furnace for thirty seconds. The control will
automatically reset after one hour.
IMPORTANT: If the furnace must be reset frequently to
obtain satisfactory operation, a problem exists with your
furnace that must be corrected. Contact a qualified ser-
vicer.
III. Maintenance
AT LEAST ONCE A YEAR, BEFORE THE HEATING
SEASON BEGINS, have the furnace checked by a qualified
servicer to be certain there is adequate combustion air and
that the furnace and the vent system are working properly.
Have the vent pipe and combustion air pipe (some models)
checked for blockage by debris or leaks, which could permit
fumes to enter the house. Replace any damaged sections
of the vent pipe.
WARNING
To avoid death or personal injury due to
electrical shock, disconnect the electrical
power before performing any maintenance.
REPLACING OR CLEANING FILTERS
WARNING
To avoid death, personal injury or property
damage, never operate furnace without a
filter installed. Dust and lint will build up on
internal parts resulting in loss of efficiency,
equipment damage and possible fire.
If filter replacement becomes necessary, it must be re-
placed with a filter of the same type and size that complies
with UL900 or CAN/ULC-S111 standards.
See the Specification Sheet for filter sizes.
WARNING
To avoid death or personal injury due to
electrical shock, disconnect the electrical
power before removing filters or performing
any maintenance.
The filter is designed for high velocity heating and cooling
applications. Filters must be inspected, cleaned or changed
every two months or as required. It is the owner's respon-
Blower
Assembly
Control
Board
Transformer
Horizontal
Left Air Discharge
(GDC)
Counterflow (GDC and GCD)
and Horizontal Right (GDC)
Air Discharge
Figure 11
Auxiliary Limit Control Position
(GDC and GCD)
WARNING
To avoid death, personal injury or property
damage due to fire or explosion, do not
reset the roll-out protection device. If it
opens, the cause must be investigated by a
qualified servicer before any attempt is
made to engage the roll-out protection
device and turn the furnace back on.
TURNING OFF FURNACE
1. Set the thermostat to lowest setting.
2. Turn off the electrical power supply to the furnace.
3. Remove the louvered door on the front of the furnace
by turning the latch screws 1/4 turn each.
4.
White Rodgers Model 36E36 or 36E37 or Honeywell
Model VR-8205: Turn the gas control knob clockwise
to the OFF position for either the White Rodgers
gas valves (Figure 4) or the Honeywell gas valve
(Figure 5).
White Rodgers Model 36E22 or 36E23: Push the
selector switch to "OFF". (Figure 6)
5. Close manual gas shut-off valve external to the fur-
nace.
6. Replace the door on the furnace.
ELECTRONIC CONTROL MODULE
The furnace is equipped with a self-diagnostic electronic
control module. If a furnace component is not operating
properly, the control module will repeatedly flash a red light
on and off in a factory-programmed sequence, depending
on the problem encountered.
If a furnace equipped with a self diagnostic module is not
operating properly, look through the observation window in
the blower access door and make note of the number of
flashes in the sequence. Contact a qualified servicer for
further information. Do not attempt to troubleshoot the
problem yourself.
