35
FURNACE STARTUP
1. Close the manual gas shutoff valve external to the furnace.
2. Turn off 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. Move the furnace gas valve manual control to the OFF position.
6. Wait five minutes then smell for gas. Be sure check near the floor as some types of gas are heavier than air.
7. If you smell gas after five minutes, immediately follow the Safety Instructions on page 5 of this manual. If you do not smell gas
after five minutes, move the furnace gas valve manual control to the ON position.
8. Replace the burner compartment door.
9. Open the manual gas shutoff valve external to the furnace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room temperature.
12. After the burners are lit, set the thermostat to desired temperature.
FURNACE SHUTDOWN
1. Set the thermostat to the lowest setting.
The integrated control will close the gas valve and extinguish flame. Following a 15 second delay, the induced draft blower will
be de-energized. After a 120, 150, 180 or 210-second delay period (field selectable delay OFF [90, 120, 150, 180] plus 30-
second ramp down), the circulator blower de-energizes.
2. Remove the burner compartment door and move the furnace gas valve manual control to the OFF position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.
GAS SUPPLY PRESSURE MEASUREMENT
GAS PRESSURE TEST
This test is to be used for field test mode only, and it will allow gas valve pressure to be checked at 100% firing rate.
1. If both ‘FAULT RECALL’ and ‘LEARN’ push buttons are pressed for greater than 1 second, the display will blank to indicate
the push buttons are pressed. Within 5 seconds, both push buttons should be released. If any push button is not released, the
test mode will not activate. The display will return to normal.
2. Once the push buttons are released, the display will flash “Ft” to indicate the push buttons are released and successful
entry into test mode has been achieved.
3. The control will force a high capacity demand. If a low capacity demand is already being serviced, it will be forced to high
capacity.
4. The display will continue to flash “Ft” until high capacity (100%) is achieved. Once achieved, the display will show “Ft”
without flashing. A 5-minute timer will be started to allow sufficient opportunity for the gas pressure to be tested.
5. If a call for heat is given or removed during the test, the system will still operate until the 5 minute test time is complete.
6. During test mode, if both push buttons are pressed for greater than 1 second, the display will blank to indicate push
buttons are pressed. If both push buttons are released within 5 seconds, the test mode will terminate and the system will
return to normal operation. Otherwise, the test mode will continue uninterrupted.
7. After completion of the 5-minute timer or test mode ter-
mination, whichever is earlier, the system will return to normal
operation, either continuing an existing heat demand or going
to the idle state.
The line pressure supplied to the gas valve must be within the
range specified below. The supply pressure can be measured at the
gas valve inlet pressure tap or at a hose fitting installed in the gas
piping drip leg. The supply pressure must be measured with the burners operating. To measure the gas supply pressure, use the
following procedure.
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
.
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