Connections On The Flue Gas Side; Fitting The Flue Gas Temperature Sensor; Mounting The Burner - Viessmann Vitocrossal 300 Installation Instructions For Contractors

Connections on the flue gas side

1.
Fig. 24
Flue system installation instructions

Fitting the flue gas temperature sensor

A
Fig. 25
Flue gas temperature sensor
A
Sealable test port
B

Mounting the burner

Separate burner documentation
2.
4.
3.
A
B
Butterfly valve
For some burners, it is necessary to regulate the back
pressure. For this purpose, a manually adjustable but-
terfly valve is installed.
A
Flue pipe internal diameter
787 and 978 kW
1100 and 1400 kW
5. Connect the flue outlet to the chimney with the
shortest possible run and a 3° rise.
Avoid sharp bends.
Danger
Leaking or blocked flue systems, or an inade-
quate supply of combustion air can cause life
threatening poisoning from carbon monoxide in
the flue gas.
Ensure the flue system is in good working order.
Vents for supplying combustion air must be non-
sealable.
An external flue gas temperature sensor can be instal-
led in the flue gas collector. The connection is made
via aperture with female thread G
A
Note
For the 787 and 978 kW output sizes, a flue gas tem-
perature sensor is prefitted in the standard delivery.
Connection is optional.
The flame tube aperture meets the requirements of EN
303-1.
Use the burner plate (part of the standard delivery) to
mount the burner.
302 mm
352 mm
. Torque: 8 Nm
⅛
29