Amana GUI* Installation Instructions Manual page 23

BURNER BOX
This furnace must use indoor air for combustion. It is not a
direct vent furnace, and it cannot be installed as a direct
vent furnace. The burner box (on some models) is present
only to reduce the burner sound transmission.
AUXILIARY LIMIT CONTROL (FIGURE 32)
A manual reset limit is located on the blower side of the
blower deck, near the center. To access this auxiliary limit,
disconnect the electrical power and remove the blower
door. If the limit control opens, the air circulation blower will
run continuously. The diagnostic light will flash four times.
These symptoms are identical to a trip of the primary limit
control. See Section X, Abnormal Operation - Integrated
Ignition Control for diagnosis.
The auxiliary limit control is designed to prevent furnace
operation in case of main blower failure on horizontal and
counterflow installations. It may also open if the power
supply is interrupted while the furnace is firing.
The auxiliary limit control is suitable for both horizontal right
and horizontal left installations. Regardless of airflow direc-
tion, it does not need to be relocated.
WARNING
To prevent death, personal injury or
property damage due to fire, follow these
directions for the auxiliary limit control. If
the auxiliary limit control opens, it may be
reset one time only.
(SERVICER'S NOTE: If it becomes necessary to slide the
blower assembly out of the furnace, the auxiliary limit
control should be removed first. After the blower assembly
is reinstalled, the auxiliary limit must be reinstalled.)
Figure 32
Auxiliary Limit Control
ABNORMAL OPERATION - INTEGRATED IGNITION
CONTROL
The following presents the probable causes of question-
able furnace operation and how to fix them. Look through
the observation window in the blower access door and
make a note of the number of flashes in sequence between
pauses. Next, refer to the Troubleshooting Chart for an
interpretation of the signals.
OPERATING INSTRUCTIONS
1. Close the manual gas valve external to the furnace.
2. Turn off the electrical power supply to the furnace.
3. Set room thermostat to lowest possible setting.
4. Remove the door on the front of the furnace.
NOTE: This furnace is equipped with an ignition device to
automatically light the burners. Do not try to light burners by
hand.
5. Honeywell Model VR8205, or White-Rodgers Model
36E36, or Robertshaw Model 7222: Turn the gas
control knob clockwise
Note: The knob should turn easily. Do not use exces-
sive force.
White-Rodgers Model 36E22: Push the switch to the
OFF position.
6. Wait five minutes to clear out any gas. Then smell for
gas, including near the floor.
7. If gas can be smelled following the five minute waiting
period in Step 6, immediately follow the instructions on
Page 2 of this manual. If you do not smell gas after five
minutes:
Honeywell Model VR8205, or White-Rodgers Model
36E36, or Robertshaw Model 7222: Turn the gas
control knob counterclockwise
tion. The knob should turn easily. Do not use excessive
force.
White-Rodgers Model 36E22: 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 20 second delay between
thermostat energizing and burner firing.
GAS INPUT, PRESSURES, AND ADJUSTMENTS
Gas supply pressure and manifold pressure with the burn-
ers operating must be as specified on the rating plate
Gas Pressure
Gas inlet pressure should be checked and adjusted in
accordance to the type of fuel being consumed.
Inlet Gas Pressure
Natural Min. 5.0" W.C., Max. 10.0" W.C.
Propane Min. 11.0" W.C., Max. 13.0" W.C.
Inlet Gas Pressure Must Not Exceed the Maximum Value Shown.
23
to the OFF position.
to the ON posi-