Weil-McLain WM97+70 Specifications download pdf (Page 26)

Part number 550-142-120/0113

WM97+ gas-fired water boiler — Boiler Manual

– 26 –

Vent/air pipes and W-M vent/air plate can be

oriented in any of the conﬁgurations shown

in Figure 21, page 25.

Figure 22 Adjacent terminations — OUTSIDE VIEW

— clearance from air inlet to exhaust from

another appliance

DIRECT VENT — Sidewall with W-M vent/air plate (continued)

Figure 23 Hole preparation in wall — INSIDE VIEW

(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 24 Termination assembly — INSIDE VIEW

Weil-McLain vent/air cap and plates

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

ADAPTERS — Use adapters if using other than 3-inch

PVC or CPVC. This is required for different materials

(polypropylene or AL24-4C stainless steel) or if using

2-inch pipe.

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 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 23. Failure to comply could result in severe

personal injury, death or substantial property damage.

e. Cut holes in the wall as shown in Figure 23, 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 24).

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Weil-McLain WM97+70 Specifications Page 26

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