Connections On The Heating Water Side; Making The Safety Connection And Testing For Tightness - Viessmann VITOROND 200 Installation Instructions Manual

Connections on the heating water side

A
B
C
Fig. 16
Boiler flow, DN 100
A
Drain, R
B ¾
(drain & fill valve on site)
Boiler return, DN 100
C
Torque for cleaning cover 7 Nm
Danger
Opening the boiler connections whilst the boiler
is under pressure can cause serious injury.
Only open the connections on the water side
after the boiler has been depressurised.

Making the safety connection and testing for tightness

Safety equipment block installation instructions
Install the safety lines.
Safety connection:
Permiss. operating pressure:
Test pressure:
Low water indicator
The boilers must be equipped with a low water indica-
tor.
Safety valve
Equip boilers with a safety valve that is type-tested to
TRD 721 [or local regulations] and is marked accord-
ing to the system version.
Note
Install all pipe connections free of load and torque
stress.
Note
Install all pipe connections free of load and torque
stress.
!
DN 65
6 bar (0.6 MPa)
9 bar (0.9 MPa)
Connection set installation instructions
Please note
Unsuitable water quality can damage the boiler
body.
Only fill the boiler with water that complies with
the "Water quality requirements" (see service
instructions).
19