Chimney Inspection - Thermo Products Spirit Series Installation, Operation And Service Manual

b. In buildings of unusually tight construction (such as those where weather
stripping and storm sash windows are used, and where basement windows are
also weather-stripped), one (1) permanent opening connecting to a well-
ventilated attic, or with the outdoors shall be provided, using a duct, if
necessary. This opening shall have a minimum free area of one (1) square inch
per 5000 BTUH of total input rate (sum of the individual appliance input rates)
of all appliances to be installed in the basement.
When an opening in the outside wall must be provided, it should be furnished with
properly screened metal sleeves.
If an exhaust fan or additional air consuming machines (e.g. a cloth dryer), is present in
the furnace room, there should be increased concern about providing adequate airflow to
the furnace. Additional efforts may be required to assure an adequate supply of
combustion and ventilation air is available to the furnace under all conditions.
When needed it is possible to have combustion air connected directly to the burner of this
furnaces from the outdoors when using the one of following the following kits.

Chimney Inspection

The chimney, vent, or any passageway for the stack gases to flow to the outdoor
atmosphere is a very important part of the heating system. No furnace, regardless of the
efficiency of the design, can perform satisfactorily when the chimney to which it is
connected is inadequate or in poor condition. Any of the following symptoms may indicate
a chimney has severe structural damage and is unsuitable for use.
 Chimney appears to be leaning to the side.
 Chimney appears to have structural damage, i.e. loose or missing blocks or bricks,
or excessive deterioration at mortar joints.
 Tile liner damaged or missing.
 Flue gas leakage along the length of the chimney between the chimney connector
and discharge termination.
 Excessive corrosion at the cleanout port or at the chimney connector entrance into
the chimney.
 Structural debris, i.e. mortar or tile liner flakes, in base of the flue way.
A qualified person shall inspect the chimney to confirm it is correctly sized for the
application, properly constructed, and in sound condition. Refer to the Standard for the
Installation of Oil-Burning Equipment, NFPA 31-2001, for details on proper chimney
sizing and construction. If needed, the chimney should be cleaned before installing the
furnace. Any accumulation of dirt or debris at the bottom of the flue should be removed.
Furnace Models
VHF-ABP, VHF-ABT
VHF-ACP, VHF-ACT
Table1: Approved Combustion Air Kits
Combustion Air Kit
(Part #)
AOPS8393
AOPS8393
7