31
FIL
TER
AIR FLOW
CENTRAL
RETURN
GRILLE
RETURN
DUCT
FI
LT
E
R
FILTER
SUPPORT
BRACKET
(Field Supplied)
FILTER
ACCESS
DOOR
Possible Upright Counterflow
Filter Locations
Figure 42
H
ORIZONTAL
I
NSTALLATIONS
Filters must be installed in either the central return register or in
the return air duct work.
S
TARTUP
P
ROCEDURE
& A
DJUSTMENT
Furnace must have a 115 VAC power supply properly connected
and grounded. Proper polarity must be maintained for correct
operation. In addition to the following start-up and adjustment
items, refer to further information in
Operational Checks
sec-
tion.
D
RAIN
T
RAP
P
RIMING
The drain trap MUST be primed prior to furnace startup. To
prime, fill both sides of the drain trap with water. This ensures
proper furnace drainage upon startup and prohibits the possibil-
ity of flue gases escaping through the drain system.
F
URNACE
O
PERATION
Purge gas lines of air prior to startup. Be sure 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 ap-
proved method. Verify that all required kits (propane gas, high
altitude, etc.) have been appropriately installed.
F
URNACE
S
TARTUP
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.
F
URNACE
S
HUTDOWN
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.
G
AS
S
UPPLY
P
RESSURE
M
EASUREMENT
G
AS
P
RESSURE
T
EST
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 sec-
onds, 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 suc-
cessful 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 re-
