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certain components before the appliance is completely positioned
and installed. These include the vent system, gas piping for the
appliance, Fresh Air Kit, and the electrical wiring. (The fan option
is available for louvered models only. Electric ignition models will
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The appliance can be mounted on any of the following surfaces:
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2. A raised wooden platform.
3. Four (4) corner supports. (Example: Four (4) concrete masonry
blocks.) These supports must be positioned so they contact all
four (4) perimeter edges on the bottom of the unit.
Locate and mark the center point of the vent pipe using a nail on
the underside of the roof. Drive the nail through the center point.
Mark the outline of the roof hole around this center point.
NOTE:
Size of the roof hole dimensions depend on the pitch of
the roof. There must be a 1 inch clearance (25mm) to the
vertical pipe sections. This clearance is to all combustible
material.
Cover the opening of the vent pipe and cut and frame the roof hole.
Use framing lumber the same size as the roof rafters and install the
frame securely. Flashing anchored to frame must withstand high
winds. The storm collar is placed over this joint to make a water-
tight seal. Non-hardening sealant should be used to completely seal
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WARNING: Major U.S. building codes specify minimum
chimney and/or vent height above the roof top. These
minimum heights are necessary in the interest of safety. These
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.
Figure 13
Note that for steep roof pitches, the vent height must be increased.
In high wind conditions, nearby trees, adjoining roof lines, steep
pitched roofs, and other similar factors can result in poor draft,
or down-drafting. In these cases, increasing the vent height may
solve this problem.
General Maintenance
Conduct an inspection of the venting system semi-annually.
Recommended areas to inspect are as follows:
1. Check areas of the venting system which are exposed to the
elements for corrosion. These will appear as rust spots or
streaks and, in extreme cases, holes. These components should
immediately be replaced.
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any bird nests or other foreign material.
3. Check for evidence of excessive condensate, such as water
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out at joints. Condensate can cause corrosion of caps, pipe and
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many elbows and exterior portions of the system being exposed
to cold weather.
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supports, such as wall straps or plumbers’ tape for rigidity.
A removable panel or other means must be provided in the enclosure
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NOTE: This also pertains to vertical vent systems installed on the
outside of the building.
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A chase is a vertical box-like structure built to enclose the gas
appliance and/or it’s vent system. Vertical vent runs on the outside
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chase.
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the chase may vary with the type of building. These instructions
are not substitutes for the requirements of local building
codes. Therefore, your local building codes must be checked
to determine the requirements for these steps.
NOTE:
When installing this vent system in a chase, it is always
good building practice to insulate the chase as you would the
outside walls of your home. This is especially important for cold
climate installations. Upon completion of building your chase
framing, install the vent system by following the instructions in
this manual. Remember to build the chase large enough so that
minimum clearance of combustible materials (including insulation)
to the vent system are maintained.
WARNING! This appliance must not be connected to a
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burning appliance.
ROOF PITCH
H (Min.)
Flat to 6/12
12" (305 mm)
6/12 to 7/12
15" (381 mm)
Over 7/12 to 8/12
18" (457 mm)
Over 8/12 to 16/12
24" (610 mm)
Over 16/12 to 21/12
36" (914 mm)
VENTING
