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All installations and services must be performed by qualified service personnel.
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3. Flue Pipe Connection & Chimney for MDA1/MHA1: Visually check flue pipe and chimney
for tightness, blockage and corrosion. If fittings are loose or if blockage or corrosion is suspected
to be a problem, contact a qualified heating contractor. Make sure horizontal runs of the flue
have an upward slope away from furnace of 1/4" per foot minimum and are physically sound
without holes, cracks or signs of corrosion. There should be no sign of moisture or vent gas
leakage at any vent connection.
ADDITIONAL REQUIREMENTS OF FURNACES VENTED THROUGH THE SIDE OF
THE HOUSE WITH NO CHIMNEY.
a. Such horizontally vented furnaces should also be inspected to make sure that all vent joints
are sealed and that the outside vent terminal is clear and free of obstruction by ice, snow or
debris. Any obstruction of the terminal should be carefully removed without damaging the vent
terminal. If ice has formed on the terminal itself, it should be removed using a blow dryer.
b. The sidewall venting kit (SWGII Power Venter) manufacturer’s instructions to be supplied by
Field Controls. Use information must be supplied by the installer then read and understood by
the user.
4. If a CDB1/CHB1 or CDX1/CHX1 furnace is equipped with a Thermo Products, LLC.
condensate neutralizer kit, (See Figure 5) 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.
Figure 5.
5. 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.
6. Make sure the furnace is sealed to the base (if applicable) without sagging, cracks or gaps.
Make sure there are no signs of deterioration of the furnace or base.
7. Examine the entire furnace, including removing the vestibule door and inspect the control
compartment and the furnace for signs of damaged or unusually worn wiring, condensation,
sooting or other damage or deterioration.
8. Restore power to the furnace. Follow the operating instructions to light furnace.