Ventilation - Mi-T-M Corporation HG Série Mode D'emploi

ILLUSTRATION #2
DRAFT DIVERTER
ILLUSTRATION #3
ENCLOSED ROOM VENTILATION
14

VENTILATION:

1. Installation of this unit in an indoor or in an enclosed area should be performed
by a qualified serviceman and all venting must conform to all local, state and
national codes, including the National Fuel Gas Code ANSI Z223.1/NFPA
No. 54. In Canada; Refer to the CSA B149.1 Gas Installation Code. The
burner exhaust should be stacked to the outside atmosphere and a draft
diverter should be installed as well.
NOTE: There should be no more than 6500 BTU per square inch of flue.
2. A draft diverter must be installed above the exhaust outlet. This diverter
breaks the chimney effect and enhances the draft through the burner for a
more efficient flame. It also helps prevent cold air downdrafts from freezing
the heat exchanger. (See illustration #2)
3. Install the recommended flue pipe per local, state and national codes, including
the National Fuel Gas Code ANSI Z223.1/NFPA No. 54. In Canada; Refer
to the CSA B149.1 Gas Installation Code. If the flue pipe exceeds 10 feet in
length or contains more than two elbows, the natural draft may be eliminated
and the burner will not ignite. In cases of this nature, a certified power vent*
may be used to remove exhaust gases from the building. Exhaust may be
vented out roof vents as well as side wall horizontal vent systems.
DO NOT install a movable flue pipe damper.
*Vent must meet all necessary local requirements and be installed according
to instruction manual and all applicable codes by a qualified technician.
4. If the unit is being installed in an enclosed room, provide adequate air for
combustion by installing openings to the room near the ceiling for ventilation
and near the floor for burner combustion. These openings should be sized
using one square inch for each 1000 BTU per inch of the machine.
Example: A pressure washer with a 400,000 BTU input requires openings of 400
square inch or approximately 3 feet x 1 foot. (See illustration #3).
5. If the building in which the unit is being installed seems unusually tightly
constructed, it is recommended that air intakes extending to the outside of the
building be employed to supply combustion air. End the intakes outside the
building with a downward opening to protect these intakes from snow and/or
rain. Include a mesh screen no smaller than 1/4" over the opening.
INSTALLATION
Operator's Manual