Start Without Prepurging (As Per En 676) - Siemens LMV37.4 Series Basic Documentation

Building Technologies
7.5.4.5.

Start without prepurging (as per EN 676)

When using valve proving and 2 fuel valves of class A, prepurging is not required
(conforming to EN 676).
Prepurging can be deactivated per parameter.
No. Parameter
Gas: Prepurging
222 0 = deactivated
1 = activated
When prepurging is activated, it is performed in accordance with the adjusted prepurge
time.
If not activated, it is nevertheless performed if one or several of the following conditions
apply:

Alterable lockout position

After an off time of >24 hours

In the event of a power failure (power-on)

In the event of shutdown due to an interruption of gas supply (safety shutdown)
No. Parameter
225 Gas: Prepurge time
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CC1P7546en
17.12.2018