Weil-McLain ULTRA299-S4 Manual page 18

S 4
®
ERIES
Venting & air — general
Vent and air pipe options and maximum allowable piping lengths
Direct vent
Sidewall
with
Weil-McLain
vent/air cap
Direct vent
only
Length
2" * 100 (ab)
-80/105
3" 100
-155
3" 100
3" 30 (c)
-230
4" 100 (d)
-299
4" 100
-310
4" 100
-399
4" 100
IPEX 3" and 4" PVC concentric vent kits can be used with standard PVC pipe, fi ttings and cement (ANSI/ASTM D1785)
except where ULC S636 compliance is required. For ULC S636 compliance, all pipe, fi ttings and cement must be IPEX
System 636. When using IPEX kits, use only IPEX product code 196006 for 3" venting or IPEX product code 196021 for 4"
Note 1:
venting.
Contact Weil-McLain for ordering information and availability of Weil-McLain venting kits.
Polypropylene - Separate pipe and concentric termination by respective manufacturers.
a — Use 3"x2" reducer at boiler
b — Use 3"x2" reducers at termination
Additional
notes
* Ultra-80 and 105 boilers installed with 2-inch vent piping automatically derate due to the pressure loss in the vent and air
piping. The derate ranges up to 10% for the Ultra-80 at 100 feet or 15% for the Ultra-105 at 100 feet.
Equivalent feet for elbows — deduct from maximum equivalent length of
piping:
PVC
PP Centrotherm 3" = 6'
18
-
GAS FIRED WATER BOILER
(All applications include allowance for the terminations.)
Direct vent
Sidewall with Sidewall or Vertical
separate pipes DO NOT use CPVC
— or —
(sidewall or vertical)
Direct vent or
Direct exhaust
Ells Length Ells Length
2 100 (a) 2 100 (ab)
2 100 2
2 100 2
2 30 (c) 2
2 100 2
2 100 2
2 100 2
2 100 2
4" = 20' Duravent 3" = 17'
— Boiler Manual
(cont.)
3" Concentric 4" Concentric
Sidewall or Vertical
DO NOT use CPVC
or ABS or ABS)
[Note 1] [Note 1]
Direct vent Direct vent
only only
Ells Length
1 NA
100 1 NA
100 1 NA
30 (c) 1 30 (c)(d)
70 (d) 1 100
70 (d) 1 100
70 (d) 1 100
NA 100
c — Use 4"x3" reducer at boiler
d — Use 4"x3" reducers at termination
Stainless steel (AL29-4C) vent pipe
install an adapter at the boiler for all applications. Also install
an adapter at the termination unless using separate-pipe
termination.
4" = 22'
Direct vent
Vertical Vertical exhaust
with separate
pipes
Direct vent
only
Ells Length Ells Length
100 (a) 1 100 (a)
100 1
100 1
1 30 (c) 1
1 100 1
1 100 1
1 100 1
1 100 1
Part number 550-100-400/0717
Direct vent
Sidewall air
Direct vent
only
Ells
1
100 1
100 1
30 (c) 1
100 1
100 1
100 1
100 1