Schwank STSp-USA - Manual (Page 19)

SP-MSTP-AU-05A
STS-p Manual
RD: DEC, 2003
RL: 5
KH
When venting horizontally, the flue vent
system should slope downwards approxi-
mately 1/4" per foot toward the vent terminal,
starting at the termination of the radiant tube.
For horizontal through the wall venting, the
approved Schwank 4" or 6" vent terminal should be used. Install the flue vent terminal
18" from the outside wall to the inside end of
terminal opening. The flue vent terminal used
must be of the approved types supplied by
Schwank or supplied by an approved "B"
vent manufacturer.
The total maximum allowable combined
length of vent and combustion air duct is 80'
for STS-p 200, 175, 155 and 130, and 50' for
STS-p 110, 80, 60 and 45. Total maximum
allowable combined vent and duct is reduced
by ten feet for every 90
o elbow installed in
the vent or duct. Should the tube system be
installed with a 90
o or with a 180 o elbow in
the radiant tube, 10 ft or 20 ft respectively
must be deducted from the length of vent and
duct. Neither the flue vent nor the combus-
tion air duct is to exceed 50 ft in length.
Lengths greater than those allowed may
create condensation problems and will void
CSA Design Certification. The horizontal
flue vent shall not terminate less than the fol-
lowing guidelines except where indicated in
brackets:
Three feet above grade level, unless its
location is adjacent to public walkways,
• Then it has to be not less than seven feet.
• Directly below a soffit or over- hang.
• Directly above a gas utility meter or
service regulator.
• Twelve inches from combustion air inlet
of any heater with input up to 100,000
Btu/hr.
• Three feet from combustion air inlet of
any heater over 100,000 BTU.
• Within six feet of a mechanical air supply
inlet to any building.
• Twelve inches from sides and top when
installed close to the corner of a building.
• Twelve inches from sides and bottom and
eighteen inches from top when installed
close to the corner of a building.
As an Option, two heaters may be vented
through an approved common 4" X 4" X 6"
flue Tee, supplied by Schwank. The two heat-
ers must then be controlled by a single com-
mon thermostat or "ON/OFF" switch.
All vent pipe with a slip-fit connection must
be mechanically secured.
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