Low Water Indicator (Water Level Limiter); Flash Trap; Safety Valve; Connections On The Flue Gas Side - Viessmann Vitocrossal 200 CM2 Series Installation Instructions Manual

Making the safety connections

Low water indicator (water level limiter)

Protect the boilers against water shortage in accord-
ance with EN 12828. For this, install a minimum pres-
sure limiter (accessories) to the fitting assembly.

Flash trap

According to EN 12828, the flash trap is not required if
an additional high limit safety cut-out and a safety
pressure limiter (maximum pressure limiter) are instal-
led.

Safety valve

Equip boilers with a safety valve that is individually tes-
ted to EN 12828 and is marked according to the sys-
tem version.
Note
Install all pipe connections free of load and torque
stress.

Connections on the flue gas side

Flue outlet

1.
Fig. 27
1. Insert the boiler flue connection (accessories) into
the flue outlet as far as it will go.
Note
Connect the flue outlet with the shortest possible
run to the flue pipe and maintain a slight incline.
Avoid sharp kinks.
30
(cont.)
The safety chain on the boiler side already includes 2
temperature limiters for restricting the maximum tem-
perature with connection to the burner control unit, a
maximum pressure limiter and 2 flue gas temperature
sensors. This means that if the flash trap is replaced,
installation of the 2nd high limit safety cut-out is not
compulsory (in accordance with approval documenta-
tion).
!
Please note
Unsuitable water quality can damage the boiler
shell.
Only fill the boiler with water that complies with
the water quality requirements in accordance
with the VDI 2035-1 directive (see service
instructions).
2. Connect the flue system.
System size of flue outlet:
Note
Make all connections free of load and torque
stress.
250 mm
7
Flue system installation instructions