Side Wall Vent Termination - Stainless Steel; Cpvc Or Pp(S) - Viessmann Vitocrossal 300 CU3A Installation Instructions Manual

Direct Venting (Two-pipe System)
Side Wall Vent Termination - Stainless Steel, CPVC or PP(s)
10 in. min.
Intake
(254 mm)
vent
terminal,
90°
Stainless
Exhaust vent terminal,
steel mesh
45° or 90°
Side wall vent termination (front view)
Side wall vent termination
Side wall vent termination (side view)
34
If less than 10 in.
required (see D in
fig. below) min 12
in. (305 mm)
min. 12 in.
(305 mm)
(see also
Vent Riser
below)
Grade or
Snow Level
All PP(s) vent termination
elbows must be secured in
place as specified by the
vent manufacturer.
min. 6 in.
(152 mm)
max 9 in.
(229 mm)
D
min 12 in.
(305 mm)
Air
min 2 in. (51 mm)
max 5 in. (127 mm)
IMPORTANT
The exhaust vent/air intake system must terminate so
that proper clearances are maintained as cited in local
codes or the latest edition of the "Natural Gas and
Propane Installation Code" CAN/CSA-B149.1 (Canada),
or the "National Fuel Gas Code" ANSI Z223.1 (NFPA 54)
(U.S.A.). See page 8.
WARNING
Vent termination must be at least 12 in. (300 mm)
above the anticipated snow level (consult your local
building authorities or local weather office). Locate
vent termination in such a way that it cannot be
blocked by snow.
IMPORTANT
For PP(s) systems, all exhaust vent and air intake piping
and elbows exposed outside, must be UV resistant
polypropylene (supplied by the vent manufacturer).
Flue
Side wall
Installation of field fabricated vent riser
CU3A Venting Systems Installation
Support bracket
Attach termination
elbow w screen
max. 36 in.
Vent
(914 mm)
riser
min. 12 in.
(305 mm)
Caulk
Grade or Max.
snow level