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Begin installation by locating the wall studs on the inside wall of the structure. Use a
stud locator or small finishing nail (repeatedly drive and remove a nail into the wall in
the area of the stud until you find it). After you have found one stud, the inside edge of
the other stud should be about 14 _ " from the one found. The studs will be about 1 1/2"
(39mm) wide. Using a level, draw vertical lines that will represent the two stud centers.
Vent and Wall Plate Installation:
Step 1 Place the supplied (paper) template at the desired inside wall location with the
template bottom resting on the floor (See Fig. 4). The mounting template large diameter
hole MUST be between the wall studs.
Step 2 Mark the location of all the holes corresponding to your unit: The large 8.31"
(211mm) opening, the holes for the wall mounting plate supporting screws (4 holes) and
for the gas supply piping. (See Fig. 3 for the correct dimensions for these openings if the
template is lost or not usable)
Step 3 Cut the marked large diameter opening corresponding to your unit through the
inside and outside walls. Ensure that this opening is large enough to allow the vent
protection pipe to pass through without bending. In addition, make sure that the holes
in the inside and outside wall are concentric to one another. NOTE: Cut the outside hole
slightly lower (not more than 1/8") than the inside hole so that the vent will have a slight
downward slope toward the outside. This will help prevent water from entering. Mark
the four (4) holes corresponding to your unit’s mounting plate. Drill the hole for the gas
supply piping with an appropriate drill size for the piping.
Step 4 Determine the overall wall thickness, (from the outside wall up to the inside wall).
Cut the three vent pipes to the following lengths with a sheet metal cutting scissors:
Exhaust pipe: overall wall thickness plus 4.84" (123 mm).
Air inlet pipe: overall wall thickness plus 2.87" (73 mm). Cut off from the side opposite
to the one with the holes.
Protection vent pipe: overall wall thickness plus 0.76" (19.2 mm). Cut off from the side
opposite to the one with the holes Assemble the vent flange ring on the protection pipe
and secure with three (3) screws supplied. (The screws must project inside the pipe).
Insert the air inlet pipe into the flange ring bore, insert the cap on the air inlet pipe and
align the holes on the three parts. Secure with three (3) screws supplied. (The screws must
project inside the air inlet pipe). Figure 7 shows the vent kit assembly.