Schwank STR Series Installation & Owner's Manual page 16

VENTED APPLICATION
All venting must be single wall "C" vent
except the portion of vent passing through a
combustible wall or roof. Type "B" vent may
then be used as per CSA requirement.
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.
The total maximum allowable combined
length of vent and combustion air duct is 50'
for STR 60 and 45. Total maximum allow-
able vent and duct is reduced by ten feet for
o
every 90 elbow installed in the vent or duct.
Should the system be installed with a 90
o
with a 180 elbow in the radiant tube, 10' or
20' respectively must be deducted from the
length of vent and duct.
Neither the flue vent nor the combustion air
duct is to exceed 50ft in length. Lengths
greater than those allowed may create con-
densation problems and will void CSA design
Certification. The horizontal flue vent shall
not terminate less than the following
distances:
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.
Three feet above grade level
•
Twelve inches from combustion air inlet
•
of any heater with input up to 100,000
Btu/hr.
Three feet from combustion air inlet of
•
o
or any heater with input over 100,000 Btu's
Directly above a gas utility meter or
•
service regulator
Directly below a soffit or overhang
•
Twelve inches from sides and bottom and
•
eighteen inches from top when installed
close to the corner of a building.
Page 12
SP-MSTR-AC-11A
STR Manual
RD: NOV, 2003
RL: 11
KH