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Part number 550-142-054/0411
GV90+ gas-fired water boiler — Boiler Manual
38
Figure 44 Multiple terminations — Weil-McLain vent/
air plate — clearance from vent of one to
air intake of the next
DIRECT VENT — Sidewall with W-M vent/air plate (continued)
Figure 45 Hole preparation in wall — Weil-McLain
vent/air plate (use template provided)
1 Inside wall
2 Drill: 3½" diameter for 3" air pipe; locate using template provided
3 For combustible materials, drill: 4" diameter for 3" vent pipe
For noncombustible materials, drill 3½" diameter for 3" vent pipe
Locate opening using template provided
4 Drill mounting screw holes using template provided
Figure 46 Termination assembly — Weil-McLain
vent/air plate
1 Vent termination (3”)
2 Lock washer, #10 (4)
3 Sheet metal screw, #10 x ½” (4)
4 Plastic wall anchor (8)
5 Sheet metal screw, #10 x 1¼” (8)
6 Outer mounting plate
7 Inner mounting plate
8 Vent pipe (butt to screen in termina-
tion)
9 Air pipe (butt to stops in termina-
tion)
Install Weil-McLain vent/air cap
The inside and outside cover plates are stamped to iden-
tify the exhaust (vent) and intake (air) openings. Make
sure to orient the plates correctly.
1. Locate termination opening and avoid obstructions:
a. Use the template supplied with the termination kit.
b. Locate the template on the outside building surface where the
penetration is to be made.
c. Make sure there will be no obstructions that might prevent
proper placement of the termination.
d. Use the template to mark the locations for the four mounting
holes, flue pipe and air pipe. Level the template with a spirit
level.
For the Weil-McLain plate, the template must be level to
ensure the flue and air pipe will be side-to-side, as shown
in Figure 45. Failure to comply could result in severe
personal injury, death or substantial property damage.
e. Cut holes in the wall as shown in Figure 46, using the location
marks made with the template. For best results, use a small-
diameter, long drill bit to drill centering holes for the flue and
air pipe openings. Then drill the large openings from both the
inside and outside.
f. The flue pipe and air pipe may be run through a rectangular
cutout (as marked on the template) in lieu of two separate
holes if desired.
2. Drill holes for the screws or plastic anchors to secure the outside
plate. Install the outside plate and mount the termination on the
plate (temporarily).
a. Cut the flue pipe so the extension through the wall will cause
the vent pipe to fully extend into the termination socket.
b. Cut the air pipe so the extension through the wall will butt the
air pipe against the stops inside the termination.
c. Temporarily slide the flue and air pipes through the opening(s).
Slide the inside wall plate over the two pipes and into position
on the inside wall.
d. Position the inside plate so the flue pipe and air pipe slope
downward slightly toward the boiler (1/4” per foot).
e. Mark the four (4) mounting holes for the plate.
f. Remove the vent and air pipe, drill the four mounting holes,
and mount the inside plate.
3. Test fit the vent/air termination on the vent pipe. Make sure the
vent pipe fully penetrates the termination socket and the air pipe
butts against the interior stops.
4. Apply silicon RTV sealant to the interior of the vent termination
and slide onto vent pipe. Rotate slightly to spread the silicon to
ensure a tight seal around the vent pipe.
5. Secure the termination in place using the four #10 x ½” sheet metal
screws and lock washers (see Figure 46).