43
I-EEDU (02-21) 150492-A
OPERATION
⚠ DANGER ⚠
• The gas burner in this gas-fired equipment is designed and equipped to provide safe, complete
combustion. However, if the installation does not permit the burner to receive the proper supply
of combustion air, complete combustion may not occur. The result is incomplete combustion,
which produces carbon monoxide, a poisonous gas that can cause death. Safe operation of
indirect-fired gas burning equipment requires a properly-operating vent system that vents all flue
products to the outside atmosphere. FAILURE TO PROVIDE PROPER VENTING WILL RESULT IN
A HEALTH HAZARD THAT COULD CAUSE SERIOUS PERSONAL INJURY OR DEATH.
• Always comply with the combustion air requirements in the installation codes and in the
section. Combustion air at the burner should be regulated only by manufacturer-
provided equipment. NEVER RESTRICT OR OTHERWISE ALTER THE SUPPLY OF COMBUSTION
AIR TO ANY HEATER. Indoor units installed in a confined space must be supplied with air for
combustion as required by code and in the
section. MAINTAIN
THE VENT SYSTEM IN A STRUCTURALLY-SOUND AND PROPERLY-OPERATING CONDITION.
Pre-Startup Checklist
Check suspension—unit must be secure and level .
Ensure that electrical supply matches voltage rating of furnace as listed on unit rating plate .
Ensure that all field wiring is in accordance with wiring diagram .
Ensure that wire gauges are as required for electrical load .
Ensure that that fuses or circuit breakers are in place and are sized correctly .
Ensure that clearances from combustibles are in accordance with
section .
If installed in confined space, ensure that furnace has adequate combustion air supply (refer to
section) .
Ensure that vent system is installed in accordance with
section .
Ensure that flue discharge openings are free from obstructions .
Check piping for for proper gas line pressure and for leaks as follows:
a . Turn manual shutoff valve OFF .
b . Turn gas supply ON .
c . Observe gas meter for movement or attach pressure gauge (readable to 0 .1 IN WC) and, after
turning gas ON for 10 seconds, turn gas supply OFF . No change in pressure should occur over a
3-minute ON .
d . If leak is indicated, locate leak by brushing leak-detecting solution on all fittings . Bubbles will appear at leak .
Repair and repeat test .
Bleed gas lines of trapped air (refer to
section) .
Startup
Turn ON the electric and gas supply to the furnace . Adjust the thermostat or ductstat so that a call for heat exists .
Observe operating sequence listed in
