Electrical Connections; Opening The Wiring Chamber - Viessmann VITODENS 100-W Installation And Service Instructions Manual

Installation sequence
Gas connection
(cont.)
2. Check for leaks.
Danger
Escaping gas leads to a risk of explosion.
Check all connections on the gas side (also
inside the appliance) for tightness.
Note
Only use suitable and approved leak detection
agents (EN 14291) and devices for the leak test.
Leak detection agents with unsuitable constituents
(e.g. nitrides, sulphides) can cause material dam-
age.
Remove residues of the leak detection agent after
testing.
!
Please note
Excessive test pressure will damage the
boiler and gas solenoid valve.
Max. test pressure 150 mbar (15 kPa). If a
higher pressure is required for leak tests,
disconnect the boiler and the gas solenoid
valve from the main supply pipe (undo the
fitting).

Electrical connections

Opening the wiring chamber

2.
4x
3.
1.
Fig. 12
22
3. Purge the gas line.
!
Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Before beginning work, touch an earthed object,
e.g. a heating or water pipe, to discharge any
static.