User Guide

Figure 20 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. NOT SHOWN below, but also approved, are the polypropylene piping and terminations listed in Figure 21, page 17 .
For these applications, use ONLY the manufacturers’ parts listed and follow all instructions provided by the pipe manufacturer.
Part number 550-100-325/0718
16
AquaBalance
®
SERIES 2 WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
6 Venting/air piping — general continued
AquaBalance® Model
Maximum vent and air pipe length =
100 feet for all applications
(Minimum length for all applications is 2 feet equivalent plus termination)
(All applications include allowance for the termination fittings plus one elbow in air piping and one elbow in vent piping)
USE
SWEEP
ELBOWS
ONLY
See Figure 21, page 17 for material specifications | See Figure 160, page 117 for part/kit numbers
Vent and air pipe sizes:
Maximum vent lengths apply for 3” vent and air pipe.
Boilers will derate as vent/air pipe length increases —
*
see rating data on Figure 174, page 131 for derate amounts.
SIDEWALL termination VERTICAL termination
Separate pipes
[Note 1]
PVC or PP Concentric
[Note 1]
Separate pipes
[Note 1]
PVC or PP Concentric
[Note 1]
See page 21 See page 23 See page 25 See page 27
Size,
inches
Materials
Fig. 21, page 19
Size,
inches
Materials
Fig. 21, page 19
Size,
inches
Materials
Fig. 21, page 19
Size,
inches
Materials
Fig. 21, page 19
80
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
120
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
2
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
155 3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV
CPVC, PP, SS
3
PVC/PVC-DWV 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 90° sweep elbow or 45° elbow — If piping contains more than 1 elbow in air or vent piping, other than termination fittings.
Note 1:
ABS may be used for intake air.
Material abbreviations: PP = polypropylene, SS = AL29-4C stainless steel.
If using stainless pipe, provide adapters 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
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.