Weil-McLain GV90+, Manual

Page: 32 / 108

Part number 550-143-010/1021
32
GV90+
series
2
gas-fired water boiler – boiler manual
Figure 39
GV90+ venting and air piping
— OPTIONS and PIPING LIMITS
Venting & air — general
(cont.)
GV90+ M
odel
Maximum vent and air pipe lengths
(Minimum length for all applications is 2 feet)
(All applications include allowance for the termination fittings)
DIRECT VENT
(combustion air piped to boiler from outside)
DIRECT EXHAUST
(combustion air from inside)
SIDEWALL
termination
VERTICAL
termination
SIDEWALL
termination
VERTICAL
termination
Weil-McLain
vent/air cap
3”
Separate pipes
3”
Concentric
[Note 1]
3”
Separate pipes
3”
Concentric
[Note 1]
3”
Coupling or
W-M Cap
3”
Coupling
See page 37 See page 39 See page 41 See page 43 See page 45 See page 51 See page 53
Max.
Length
(feet)
Max.
Length
(feet)
Max.
Length
(feet)
Max.
Length
(feet)
Max.
Length
(feet)
Max.
Length
(feet)
Max.
Length
(feet)
-3
100 100 100 100 100 100 100
-4
100 100 100 100 100 100 100
-5
100 100 100 100 100 100 100
-6
100 100 100 100 100 100 100
Equivalent feet for elbows — deduct from maximum equivalent length of piping (does not apply to termination fittings)
PVC • 7 feet per for each 3-inch 90° long-radius or 45° elbow
• 16 feet for each 3-inch short-radius elbow
Centrotherm 3” = 6’ 4” = 20’ Duravent 3” = 17’ 4” = 22’
Note 1:
Use only PVC or Polypropylene pipe DO NOT use CPVC or ABS with concentric termination kits.
IPEX 3” PVC concentric vent kits can be used with standard PVC pipe, fittings and cement (ANSI/ASTM D1785) except where ULC
S636 compliance is required. For ULC S636 compliance, all pipe, fittings and cement must be IPEX System 636.
For UL 1738 compli-
ance all pipe, fittings and cement must be IPEX System 1738.
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.
Polypropylene - Separate pipe and concentric termination by respective manufacturers.