Weil-McLain Series 2 Manual page 23

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®
erieS
Venting & air — general
Figure 22 ECO 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.
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 one elbow in air piping and one elbow in vent piping).
See Figure 23, page 24 for material specifications | See Figure 119, page 115 for part/kit numbers
If using 2" pipe, provide 3"x 2" tappered reducers at boiler connections and at Weil-McLain vent/air cap or at concentric terminations.
Boilers will derate as vent/air pipe length increases — see rating data on Figure 132, page 127 for derate amounts.
Separate pipes
[Note 1]
See page 28
Size, Materials
inches Fig. 23, page 24
PVC/PVC-DWV
2
CPVC, PP, SS
70
PVC/PVC-DWV
3
CPVC, PP, SS
PVC/PVC-DWV
110
3
CPVC, PP, SS
PVC/PVC-DWV
3
CPVC, PP, SS
155
** Model 155 may be concentric sidewall vented using Centrotherm polypropylene pipe (Eco Systems InnoFlue® Single-wall) ONLY if
using Centrotherm stainless steel concentric termination kit, part number ICWS3513.
All elbows in vent and air piping must be sweep elbows ONLY. DO NOT use short-radius elbows. When
transitioning to 3" to 2", use tappered reducer with 3" PVC nipple (L ≥ 6"). Do not use 3" to 2" bushing.
Bushings will not seal in boiler adapters.
Equivalent feet for elbows (USE SWEEP ELBOWS ONLY) — deduct from max. equivalent length of piping (does not apply to termination fittings).
PVC • 7 feet per for each additional 90° sweep elbow or 45° elbow — If piping contains more than 1 elbow in air or vent piping, other than termination fittings.
PP • Centrotherm 3" = 6'
Material abbreviations: PP = polypropylene, SS = AL29-4C stainless steel
If using polypropylene or stainless pipe, provide adapters to for 3" boiler connections and for terminations, if required
IPEX 3" PVC concentric vent kits can be used with standard PVC pipe, fittings and cement (ANSI/ASTM D1785) except if ULC S636
1:
Note
compliance is required. For ULC S636 compliance, all pipe, fittings and cement must be IPEX System 636. If 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.
2: Use only Weil-McLain approved termination kits listed in Figure 119, page 115.
Note
Part number 550-142-190/1218
2
-
g
aS fired water boiler
NOT SHOWN
below, but also approved, are the polypropylene piping and terminations listed in Figure 23, page 24.
(Minimum length for all applications is 2 feet)
Vent and air pipe sizes:
Maximum vent lengths apply for either 2" or 3" vent and air pipe.
SIDEWALL termination
PVC or PP Concentric 3" Weil-McLain PVC
vent/air cap [Note 1]
[Note 1]
See page 30 See page 32
Size, Materials Size,
inches Fig. 23, page 24 inches
PVC/PVC-DWV
2 2
CPVC, PP, SS
PVC/PVC-DWV
3 3
CPVC, PP, SS
PVC Concentric
3 –
only
PVC/PVC-DWV
3 3
CPVC, SS, PP**
4" = 20'
— Boiler Manual
(continued)
Separate pipes
[Note 1]
See page 32
Materials Size, Materials
Fig. 23, page 24 inches Fig. 23, page 24
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
PVC/PVC-DWV
3
–
CPVC, PP, SS
PVC/PVC-DWV PVC/PVC-DWV
3
CPVC, PP, SS CPVC, PP, SS
Duravent 3" = 17'
USE SWEEP
ELBOWS
VERTICAL termination
PVC or PP Concentric Vertical Vent,
[Note 1] Side Air [Note 1]
See page 36
Size, Materials Size,
inches Fig. 23, page 24 inches
PVC/PVC-DWV
2 2
CPVC, PP, SS
PVC/PVC-DWV
3 3
CPVC, PP, SS
PVC/PVC-DWV
3 3
CPVC, PP, SS
PVC/PVC-DWV
3 3
CPVC, SS,
4" = 22'
ONLY
See page 38
Materials
Fig. 23, page 24
PVC/PVC-DWV
CPVC, PP, SS
PVC/PVC-DWV
CPVC, PP, SS
PVC/PVC-DWV
CPVC, PP, SS
PVC/PVC-DWV
CPVC, PP, SS
23