CPVC Vent System (continued)
3
Vent System
Room Air Independent Operation
(Sealed Combustion Operation)
B
A
b
a
Room Air Dependent Operation
B
b
A
A
C
a = zero
3
CPVC vent material must be ULC/UL listed, for Category IV boilers. Suggested source: IPEX Inc.
4
Boiler cannot support weight of vent system. Support venting as prescribed in vent manufacturer's installation instructions.
5
Combustion air supply pipe may be made of the following materials: ABS, CPVC, PVC, or stainless steel.
A maximum of 5 elbows may be installed in the vent and air intake system; do not exceed maximum equivalent vent length.
"
Always follow Viessmann Vitodens Venting System Installation Instructions (PN 5285 268).
"
I M P O R T A N T :
Do not use any DWV plumbing
pipes to vent this boiler.
Maximum
Equivalent Length
A
Combustion Air Intake
B
Flue Gas Outlet
Maximum
Equivalent Length
A
A
Combustion Air Intake
Combustion Air Intake
B
Flue Gas Outlet
C
Air Opening
Vent System Diameter
a + b ≦
1 Boiler Vent Adaptor
(included with boiler)
2 Double-Pipe Adaptor
3 Adaptor(s), CPVC
80mm > 3" (order 2 pcs)
3" > 4"
(order 2 pcs)
(not shown)
4
4 Venting Support
5 Combustion Air Intake Vent Material
Allowable materials: see note below
6 ULC/UL listed
3
CPVC Vent Material
45° Elbow EqL=3ft / 0.9m
90° Elbow EqL=5ft / 1.5m
7 Bird Screen
(order 2 pcs)
a + b ≦
1 Boiler Vent Adaptor
(included with boiler)
2 Flue Adaptor, CPVC
60mm > 2"
3 Adaptor(s), CPVC
2" > 3"
3" > 4"
(not shown)
4
4 Venting Support
6 ULC/UL listed
3
CPVC Vent Material
45° Elbow EqL=3ft / 0.9m
90° Elbow EqL=5ft / 1.5m
7 Bird Screen
Appendix (continued)
2"
3"
4"
n.a.
66
79
20
24
—
—
—
7186 032
7186 032
—
7134 770
7134 770
and
—
field
supplied
—
field
field
supplied
supplied
field
field
5
supplied
supplied
—
field
field
supplied
supplied
—
7134 781
7134 782
40
66
79
12
20
24
—
—
7134 769
7134 769
7134 769
—
field
field
supplied
supplied
and
—
—
field
supplied
field
field
field
supplied
supplied
supplied
field
field
field
supplied
supplied
supplied
7134 780
7134 781
7134 782
ft
m
Order No.
—
Order No.
Order No.
Order No.
Order No.
Order No.
Order No.
Order No.
ft
m
—
Order No.
Order No.
Order No.
Order No.
Order No.
Order No.
Order No.
25