Gas Connection - Viessmann Vitodens 242-F Installation And Service Instructions Manual

Installation sequence
Installing the boiler

Gas connection

Fig. 18 Shown with connection sets for finished walls
(accessories)
Gas connection R
A ½
Information on operation with LPG
When installing the boiler in rooms below ground level
we recommend fitting an external safety solenoid
valve.
1. Secure gas shut-off valve to gas connection
2. Carry out a tightness test.
Note
Only use suitable and approved leak detection
agents (EN 14291) and devices for the tightness
test. Leak detection agents with unsuitable constitu-
ents (e.g. nitrites, sulphides) can cause material
damage.
Remove leak detection agent residues after testing.
!
Please note
Excessive test pressure may damage the
boiler and the gas valve.
Max. test pressure 150 mbar (15 kPa).
Where higher pressure is required for tight-
ness tests, disconnect the boiler and the gas
valves from the gas supply pipe (undo the fit-
ting).
26
(cont.)
.
A
3. Purge the gas line.
For conversion to a different gas type, see page 44