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All installations and services must be performed by qualified service personnel.
C. VISUAL INSPECTION PROCEDURE
It is recommended that the homeowner/user conduct the following periodic visual inspection of
the furnace at the start of the heating season and monthly during the heating season.
: Call a qualified heating contractor to report suspected deficiencies (Do not attempt to
make repairs yourself!)
1. Turn off power to furnace.
2. Vent pipe, air intake pipe, and condensate system: Visually check the vent and intake pipe as
well as condensate lines both inside and outside the furnace to make sure that vent intake
joints and the condensate system are sealed. There should be no sign of water leakage at any
vent intake or condensate joints or anywhere inside the furnace. Make sure that horizontal
runs of vent pipe slope upward towards the outside. The inlet pipe should slope slightly
downward to prevent condensate build up. Any signs of damage, leakage, deterioration, or
possible blockage should be immediately reported to your dealer or the local gas company.
It is recommended that the condensate removal system be cleaned annually by a qualified service
agency to insure its proper and continued operation.
Outside vent and outside combustion air termination: the outside vent terminations should be
inspected to insure that they are clear and free of obstruction by ice, snow, debris, of vegetation.
Any obstruction of the terminal should be carefully removed without damaging the vent terminal.
If ice has formed on the outside terminals themselves, it should be removed.
3. If the furnace is equipped with a Thermo Products, LLC. condensate neutralizer kit, (See
Figure 4) it should be inspected at the start of every heating season. Remove the 2" PVC cap
from the neutralizer kit and replace dissolved filter material with #9 limestone. Keep instructions
for neutralizer kit in plastic pouch on the inside of the furnace blower door.
4. Return Air Duct Connection: Check to see if it is (1) physically sound; (2) sealed to the
furnace casing; and (3) terminates outside the space containing the furnace.
Figure 4
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