Viessmann Vitopend 100-W Installation And Service Instructions For Contractors page 12

Installation sequence
Gas connection
A
1. Fit gas shut-off valve to gas connec-
tion A.
Torque 30 ±2 Nm.
Conversion to alternative
gas types:
Conversion kit installation
instructions
12
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 con-
stituents (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.
Maximum test pressure
150 mbar (15 kPa). Where
higher pressure is required for
tightness tests, disconnect
the boiler and the gas valves
from the gas supply pipe
(undo the fitting).
3. Purge the gas line.