Owner`s manual

GP-MSJW-CX-07B
STW-JZ / IW Manual
RD: Sept, 2005
RL: 7B
KH
The total maximum allowable combined
length of vent and combustion air duct is 80'
for STW-JZ / IW 200, 175, 155 and 130, and
50' for STW-JZ / IW 110, 80, 60 and 45. To-
tal maximum allowable combined vent and
duct is reduced by ten feet for every 90
o
el-
bow 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 individ-
ual flue vent nor the combustion air duct is
to exceed 50 ft in length. Exceeding the al-
lowable lengths may create condensation
problems and will void CSA Design Certifi-
cation. The horizontal flue vent shall not ter-
minate less than the following guidelines ex-
cept where indicated in brackets:
• One feet above grade level, unless its lo-
cation is adjacent to public walkways,
then it has to be not less than seven feet.
• Must be installed to prevent blockage by
snow and protect building materials from
degradation by flue gases.
• Directly below a soffit or over- hang.
• Directly above a gas utility meter or ser-
vice 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 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"
Vent Tee, supplied by the distributor. The
two heaters must then be controlled by a sin-
gle common thermostat or "ON/OFF" switch.
• All vent pipe with a slip-fit connection
must be mechanically secured. A length
of ‘C’ Vent is to be installed on the
swaged end of the last tube before any
Tee is fitted.
Page 17
The heater is designed to operate with single
wall 4” diameter 26 gauge minimum exhaust
vent.
When vent and combustion air are taken
through the roof, the exhaust vent should al-
ways terminate higher than the combustion
air intake, to prevent recycling the products
of combustion back into the heater.
FIGURE 17