Clean Comfort™ brand MERV 11 air cleaners have 5¼"
media filters and are available in the following configu-
rations. Consult your distributor for information on our
complete line of IAQ Clean Comfort™ products.
The figure below shows possible filter locations.
Filters must be installed in either the central return register or
in the return air duct work.
Startup Procedure & Adjustment
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
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 preforations must be sealed
with duct sealant compound or other suitable method to
prevent air leakeage. 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 en-
sures proper furnace drainage upon startup and prohibits the
possibility of flue gases escaping through the drain system.
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 wa-
ter solution, an electronic combustible gas detector, or other
approved method. Verify that all required kits (propane gas,
high altitude, etc.) have been appropriately installed.
1. Close the manual gas shutoff valve external to the
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
6. Wait five minutes then smell for gas. Be sure check
near the floor as some types of gas are heavier than
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
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room
12. After the burners are lit, set the thermostat to desired
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
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 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 mea-
sured 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