Weil-McLain WM97+ Manual page 16

WM97+ -
gas fired water boiler
Venting & air — general
Figure 14 WM97+ venting and air piping — DIRECT VENT ONLY — OPTIONS and PIPING LIMITS
The table below lists the acceptable vent/air pipe terminations described in this manual. Follow all instructions provided
to install the vent/air system.
listed in Figure 15, page 17. For these applications, use ONLY the manufacturers' parts listed and follow all instructions
provided by the pipe manufacturer.
Maximum vent and air pipe length = 100 feet for all applications
(All applications include allowance for the termination fittings plus two elbows in air piping and 2 elbows in vent piping)
See Figure 15, page 17 for material specifications | See Figure 93, page 95 for part/kit numbers
When using 2" pipe, provide 3"x2" reducers at boiler connections and at Weil-McLain vent/air cap or at concentric terminations.
Boilers using 2" pipe will derate as vent/air pipe length increases — allow up to 10% for the WM97+70 or 15% for the WM97+110.
3" Weil-McLain PVC
vent/air cap [Note 1]
See page 21
Size, Materials
inches Fig. 15, page 17
PVC/PVC-DWV
2
CPVC, PP, SS
70
PVC/PVC-DWV
3
CPVC, PP, SS
CPVC, PP or SS
2
ONLY
110
PVC/PVC-DWV
3
CPVC, PP, SS
All elbows in vent and air piping must be sweep elbows ONLY. DO NOT use short-radius elbows.
Equivalent feet for elbows (USE SWEEP ELBOWS ONLY) — deduct from max equivalent length of piping (does not apply to termination fittings)
• 7 feet per for each additional 3-inch 90° sweep elbow or 45° elbow — If piping contains more than 2 elbows in air or vent piping
Material abbreviations: PP = polypropylene, SS = AL29-4C stainless steel
When using polypropylene or stainless pipe, provide adapters to for 3" boiler connections and for terminations, when required
IPEX 3" PVC concentric vent kits can be used with standard PVC pipe, fittings and cement (ANSI/ASTM D1785) except where ULC
Note 1:
S636 compliance is required. For ULC S636 compliance, all pipe, fittings and cement must be IPEX System 636. When using IPEX
kits, use only IPEX product code 196006 for 3" venting.
Contact Weil-McLain for ordering information and availability of Weil-McLain venting kits.
16
— Boiler Manual
NOT SHOWN
below, but also approved, are the polypropylene piping and terminations
(Minimum length for all applications is 2 feet)
Vent and air pipe sizes:
The maximum vent lengths below apply for either 2" or 3" vent and air pipe.
SIDEWALL termination
Separate pipes PVC or PP Concentric
[Note 1]
See page 23
Size, Materials Size,
inches Fig. 15, page 17 inches
PVC/PVC-DWV
2
CPVC, PP, SS
PVC/PVC-DWV
3
CPVC, PP, SS
CPVC, PP or SS
2
ONLY
PVC/PVC-DWV
3
CPVC, PP, SS
(cont.)
Separate pipes
[Note 1]
See page 25 See page 27
Materials Size,
Fig. 15, page 17 inches
PVC/PVC-DWV
2 2
CPVC, PP, SS
PVC/PVC-DWV
3 3
CPVC, PP, SS
CPVC, PP or SS
2 2
ONLY
PVC/PVC-DWV
3 3
CPVC, PP, SS
USE SWEEP
ELBOWS ONLY
VERTICAL termination
PVC or PP Concentric
[Note 1] [Note 1]
See page 29
Materials Size, Materials
Fig. 15, page 17 inches Fig. 15, page 17
PVC/PVC-DWV PVC/PVC-DWV
2
CPVC, PP, SS CPVC, PP, SS
PVC/PVC-DWV PVC/PVC-DWV
3
CPVC, PP, SS CPVC, PP, SS
CPVC, PP or SS CPVC, PP or SS
2
ONLY
PVC/PVC-DWV PVC/PVC-DWV
3
CPVC, PP, SS CPVC, PP, SS
Part number 550-142-058/0811
ONLY