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13. Set thermostat to call for heat.
14. Allow unit to initiate a complete call for heat cycle.
15. Check for air leakage around collector box. A whistling
noise may indicate air leak in collector box seal.
16. Allow the call for heat to continue until water drains out
the condensate drain. Check for water leaks around the
collector box and inducer assembly.
NOTE: If there is a severe air leak in the collector box seal,
pressure switch may not close or will re−open, resulting in no
ignition or erratic burner operation.
NOTE:
As part of the system check−out, verify that the
following conditions are not affecting the operation of the
furnace:
S
Short Cycling−Defective thermostat: Incorrect
thermostat anticipator setting, dirty filter or over−sized
furnace.
S
Under firing/low BTU input: Set manifold pressure and
verify firing rate as shown on rating plate by clocking
the gas meter.
S
Overfiring/high BTU input: Set manifold pressure and
verify firing rate as shown on rating plate by clocking
the gas meter.
6
17. After System Check−out is complete, set thermostat
18. Verify that burner shuts down and blower completes
19. Verify furnace operates properly and set thermostat to
20. Re−install outer doors.
Copyright 2015 International Comfort Products
Lewisburg, Tennessee 37091 USA
Specifications subject to change without notice.
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.
below room temperature.
selected off delay time.
desired room temperature.
443 06 5102 01
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