Coaxial Vent Termination; Coaxial Vent Termination Installation; Protective Screen - Viessmann Vitocrossal 300 CU3A Installation Instructions Manual

Side Wall Vent Installation (Coaxial)

Coaxial Vent Termination

1 3
Legend
1 Vent termination
2 Wall flashing (inside)
3 Wall flashing (outside)
Wall opening information
Vent system
80/125
100/150
110/160
Note: Termination may not be exactly as shown, refer
to the vent manufacturers specific component
specifications.
Refer to the vent manufacturers Installation
Instructions
Dimensions
a
12 in. (305 mm)
16
2
Opening Ø
5a in. (133 mm)
6e in. (160 mm)
6 11 / in (170 mm)
16
.
Protective screen, side view for vent system (all sizes).
IMPORTANT
Potential gaps between the vent-air intake and the
surrounding construction which may cause air, rain or flue
gases to leak into the wall or the building, must be sealed
with approved outdoor sealant/caulking to prevent leakage
of any kind.
IMPORTANT
If required the vent termination may be shortened, refer to
the manufacturers instructions.
Side wall vent termination installation
1. Provide side wall opening (see table above) to install
vent termination.
2. Slide vent termination 1 with wall flashing 3 into
opening (drain openings must be located on the
outside of the wall, pointing downward).
3. Attach wall flashing 2 to inside of wall using the
screws and plugs provided.
4. Attach wall flashing 3 to outside of wall.

Protective screen

1. Secure protective screen A into place, using the four
stainless steel screws and anchors.
IMPORTANT
The protective screen MUST be installed.
2. Connect vent termination from inside and ensure the
vent termination has a min. 3º downward slope toward
the boiler.
b
must be at least 4 in.
CU3A Venting Systems Installation
Protective screen
front view
c
9.5 in. (241 mm)