Viessmann VITODENS 050-W Installation And Service Instructions Manual page 22

Installation sequence
Mounting the boiler and making connections
Gas connection
1. Fit the gas shut-off valve with bend
to connection A.
2. Connect the gas supply to connec-
tion A.
22
A
¨
3. 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 unsuita-
ble constituents (e.g. nitrides, sul-
phides) can cause material dam-
age.
Remove residues of the leak detec-
tion agent after testing.
(cont.)