Combustion Air Connection; Removing The Front Panel - Viessmann Vitocrossal 300 CU3A 26 Installation Instructions Manual

Vitocrossal 300 CU3A 26 to 199 Installation

Combustion Air Connection

CPVC adaptor
80 mm to 3 in.
Refer to the CU3A venting Installation
Instructions for venting configurations and
limitations.

Removing the Front Panel

CAUTION
To prevent equipment damage, install all pipework
free of load and torque stresses.
We recommend fitting an on-site support immediately
downstream of the boiler flue connection. Connect the
flue outlet to the flue pipe via the shortest possible run,
with a slight rise (min. 3°). Avoid sharp bends.
See venting Installation Instructions.
Flue gas connection:
CU3A 26, 35, 94, 125:
CU3A 45, 57, 160, 199:
Combustion air connection:
CU3A 26, 35, 94, 125:
CU3A 45, 57, 160, 199:
IMPORTANT
The boiler flue gas collector vent is not designed to
support the weight of the venting system.
WARNING
Combustion and exhaust vent pipes must not come
loose. Secure the pipes using venting manufacturer's
anchoring/mounting accessories for both combustion
and exhaust pipes.
1. Remove the retaining screw and set aside.
2. Remove boiler front panel by pulling out and lifting
up off the locking tabs.
Boiler Connections
3 in. (80 mm)
7
4 in. (110 mm)
7
3 in. (80 mm)
7
3 in. (80 mm)
7
21