Weil-McLain Ultra 3 series User Manual page 21

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gas fired water boiler
Sidewall vent/air termination:
Install terminations — 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 20. Failure to comply could result in severe
personal injury, death or substantial property damage.
e. Cut holes in the wall as shown in
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. When using 3-inch vent piping with a 4-inch termination (Ul-
tra-230 applications), increase the flue pipe size to 4 inch before
the pipe passes through the wall. This is required to obtain a
seal between the flue pipe and the termination.
d. 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.
e. Position the inside plate so the flue pipe and air pipe slope
downward slightly toward the boiler (1/4" per foot).
f. Mark the four (4) mounting holes for the plate.
g. 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 21).
Part number 550-100-090/0809
— Boiler Manual
Figure 21, using the location
Weil-McLain plate
Figure 20
Hole preparation in wall — Weil-McLain vent/
air plate
Figure 21
Termination assembly — Weil-McLain vent/
air plate
1 Vent termination (3" or 4")
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)
Figure 22
Install termination plate
(cont.)
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)
Weil-McLain sidewall
termination plate
• Install pipe supports every 5
feet on both the horizontal and
vertical runs.
• Install a hanger support within
6 inches of any upturn in the
piping.
• The Weil-McLain plate
termination must be installed
before piping from the boiler to
the termination.
• Slope horizontal piping
downward toward the boiler at
least 1/4 inch per foot.
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