32
Clean Comfort™ brand MERV 11 air cleaners have 5¼”
media filters and are available in the following configura
-
tions. Consult your distributor for information on our com
-
plete line of IAQ Clean Comfort™ products.
The figure below shows possible filter locations.
Horizontal Installations
Filters must be installed in either the central return register or in
the return air duct work.
FI
LTE
R
AIR FLOW
CENTRAL
RETURN
GRILLE
FI
LTE
R
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
Figure 43
Startup Procedure & Adjustment
Furnace must have a 115 VAC power supply properly con
-
nected 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
section.
Furnace Cabinet
Check that all furnace cabinet sealing components are in
place (plugs, grommets, gaskets).
NOTE; If the furnace bottom panel has not been removed
for a return duct connection, all perforations must be sealed
with duct sealant compound or other suitable method to
prevent air leakage. For optimal performance verify that all
door gaskets are properly in place and replace as needed
to prevent air leakage.
Drain Trap Priming
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
possibility of flue gases escaping through the drain system.
Furnace Operation
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 approved method. Verify that all required kits (propane
gas, high altitude, etc.) have been appropriately installed.
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 con
trol 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 Considerations
on page 2 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. The
circulator blower will shut off after the time delay
expires (selectable 90, 120, 150, 180 seconds).
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
The line pressure supplied to the gas valve must be within
the range specified below. The supply pressure can be mea
-
sured 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.
1. Turn OFF gas to furnace at the manual gas shutoff
valve external to the furnace.
2. Connect a calibrated water manometer (or appropriate
gas pressure gauge) at either the gas valve inlet
pressure tap or the gas piping drip leg. See White-
Rodgers 36J54 gas valve figure for location of inlet
pressure tap.
