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22.11.21, Subject to alterations
Gas pressure monitor
15 Gas pressure monitor
15.1 Gas pressure switch min.
The
gas pressure switch MIN
at the gas fitting
serves to monitor the gas inlet pressure. If the mini-
mum gas inlet pressure is not reached (factory set-
ting), the burner is switched off. The burner
automatically starts again when the minimum pres-
sure is exceeded. The gas pressure monitor as
den-
sity control DK
generally serves to check the valves
and must be set to 50% of the static gas inlet pres-
sure.
The monitoring of the gas inlet pressure and the
tightness control are carried out either only with the
gas pressure switch DK
(the plug bridge GDW MIN
must not be removed)
or with the gas pressure
switch MIN and the gas pressure switch DK
(in this
case the plug bridge GDW MIN must be replaced
with the connection of the gas pressure switch
MIN)
.
When using the MB-VEF 412 gas line, the connec-
tion is made via the 7-pin plug and is only evaluated
as DK MIN. The plug bridge must not be removed.
Additional parameterization of the LMV is not
required here.
15.2 Gas pressure switch max.
Optionally, a gas pressure switch max. to be built in.
The LMV and the wiring are prepared so far that only the bridge in the socket (brown) on the burner has to
be removed. In addition, the plug and the gas pressure switch must be max. Wired according to wiring di-
agram. If the gas pressure switch max. has triggered a fault in the display (AZL) displayed.
First, the gas pressure switch must be max. be unlocked, the lid of the gas pressure switch must max. un-
screwed and the red button pressed.
Then the fault in the display (press the
i / reset
button for 3 sec.) Can be deleted.
