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FIGURE 17
The total maximum allowable combined length of
vent and combustion air duct is 80' for STV-JZ
155 and 130, and 50' for STV-JZ 110, 80 and 60.
Total maximum allowable combined vent and
duct is reduced by ten feet for every 90
installed in the vent or duct. Should the tube sys-
tem be installed with a 90
in the radiant tube, 10 ft or 20 ft respectively must
be deducted from the length of vent and duct. Nei-
ther the individual flue vent nor the combustion
air duct is to exceed 50 ft in length. Exceeding the
allowable lengths may create condensation prob-
lems and will void CSA Design Certification. .
The horizontal flue vent shall not terminate less
than the following guidelines except where indi-
cated in brackets:
One feet above grade level, unless its location
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 degrada-
tion by flue gases.
o
elbow
o
o
or with a 180
elbow
Page 17
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 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 single 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.
GP-MSJV-BX-07A
STV-JZ Manual
RD: MAR 2009
RL: 07A - BA
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