18
SYSTEM OPERATION
Figure 15
AIR FLOW
CENTRAL
RETURN
GRILLE
FILTER
SUPPORT
BRACKET
(Field Supplied)
Possible Upright Counterflow
Filter Locations
Figure 16
Horizontal Installations
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 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 do 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. Follow
NFPA 54, National Fuel Gas Code 8.1 for proper purging
methods. In Canada, follow approved purging methods in
B149.1-15.
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 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.
