Gas Connection; Gas Installation To Bs 6891:2005 - Viessmann B1HF Installation And Service Instructions Manual

Installation sequence

Gas connection

A
Fig. 12
1. If the gas connection has not been fitted previ-
ously, seal gas shut-off valve
nection.
When carrying out any work on gas connection fit-
tings, counterhold with a suitable tool. Never trans-
fer any forces to the internal components.
Information on operation with LPG
Install an external safety solenoid valve if the boiler
is installed below ground level.
An EM-EA1 extension (accessories) is required to
connect the safety solenoid valve.

Gas installation to BS 6891:2005

It is the gas installer's responsibility to size the gas
installation lines in accordance with BS 6891:2005.
22
2. Check for leaks.
A to the gas con-
3. Purge the gas line.
If it is determined that the operating pressure falls
below the minimum outlet level for the measuring
device of 19 MB, it should be checked to ensure that
the gas pressure is sufficient for correct and safe oper-
ation.
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 tightness
test. Leak detection agents with unsuitable constit-
uents (e.g. nitrides, sulphides) can cause material
damage.
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).