5
S
Low temperature rise: Set unit for correct temperature rise range
as shown on unit rating plate.
S
Contaminated combustion air: Remove contaminates or provide
ample fresh air for combustion.
S
Excessive amounts of outside ventilation air: Return air
temperature cannot be below 60 degrees F for extended periods
of time.
S
Incorrect venting or termination: Recirculation of products of
combustion into the combustion air pipe can damage the
furnace. Verify proper venting and vent termination per
installation instructions. For additional information, and a
complete sequence of furnace operation, refer to furnace
Installation, Start--Up and Operating Instructions.
16. After System Check--out is complete, set thermostat below
room temperature.
17. Verify that burner shuts down and blower completes selec-
ted off delay time.
18. Verify furnace operates properly and set thermostat to de-
sired room temperature.
19. Re--install outer doors.
Figure 4
Blower Assembly
338106
