Schwank STR-CANADA - Manual (Page 18)

SP-MSTR-AC-11A
STR Manual
RD: NOV, 2003
RL: 11
KH
For ease of installation, this heater has been
provided with a fresh air intake duct hood. It
can be used as an outdoor intake hood to
bring combustion air to the heater from
outside, or when using air from the room, it
should be installed over the intake flange on
top of burner as a dust cap.
Do not use plastic or cloth flexible duct for
fresh air intake.
In installations where chlorinated hydrocarbons are in
use, such as Trichloroethylene, Chloroethylene Nu or
Refrigerants, it is essential that combustion air be brought
in from non-contaminated areas. Burning the fumes from
these gases will create Hydrochloric Acid fumes, which are
detrimental to humans, equipment and buildings.
10. COMBUSTION AIR DUCT
Where heater is operated in a negative air
condition or in contaminated air atmosphere
such as woodworking shops, air for
combustion must be ducted from outside to
intake flange on burner blower. Combined
maximum length of combustion air duct and
flue vent is 50' for STR 60 and 45. The
total maximum vent allowable is reduced by
10' for every 90
o vent elbow installed.
INSTALLER'S CONVENIENCE KIT: (optional)
• 1 - 10' x 4" Flexible Aluminium Fresh Air
Intake Duct.
• 1 - Length of Hanging Chain
• 1 - 4” Horizontal Vent Terminal
The air intake inlet shall not be located less than the following distances:
Page 14
• Three feet above grade
• Twelve inches from flue vent terminal of
any heaters with input up to 100,000 BTU
• Three feet from flue vent terminal of any
heaters with input over 100,000 BTU
CAUTION: