Specifications

Part number 550-100-090/0809
21
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
BASIC INSTALLATION
Sidewall vent/air termination: Weil-McLain plate (cont.)
Hole preparation in wall — Weil-McLain vent/Figure 20
air plate
Termination assembly — Weil-McLain vent/Figure 21
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)
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 termination plate Figure 22
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.
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.
Locate termination opening and avoid obstructions:1.
Use the template supplied with the termination kit.a.
Locate the template on the outside building surface where the b.
penetration is to be made.
Make sure there will be no obstructions that might prevent c.
proper placement of the termination.
Use the template to mark the locations for the four mounting d.
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.
Cut holes in the wall as shown in e. Figure 21, 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.
The flue pipe and air pipe may be run through a rectangular f.
cutout (as marked on the template) in lieu of two separate
holes if desired.
Drill holes for the screws or plastic anchors to secure the outside 2.
plate. Install the outside plate and mount the termination on the
plate (temporarily).
Cut the flue pipe so the extension through the wall will cause a.
the vent pipe to fully extend into the termination socket.
Cut the air pipe so the extension through the wall will butt the b.
air pipe against the stops inside the termination.
When using 3-inch vent piping with a 4-inch termination (Ul-c.
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.
Temporarily slide the flue and air pipes through the opening(s). d.
Slide the inside wall plate over the two pipes and into position
on the inside wall.
Position the inside plate so the flue pipe and air pipe slope e.
downward slightly toward the boiler (1/4” per foot).
Mark the four (4) mounting holes for the plate.f.
Remove the vent and air pipe, drill the four mounting holes, g.
and mount the inside plate.
Test fit the vent/air termination on the vent pipe. Make sure the 3.
vent pipe fully penetrates the termination socket and the air pipe
butts against the interior stops.
Apply silicon RTV sealant to the interior of the vent termination 4.
and slide onto vent pipe. Rotate slightly to spread the silicon to
ensure a tight seal around the vent pipe.
Secure the termination in place using the four #10 x ½” sheet metal 5.
screws and lock washers (see Figure 21).