Siemens LMV51 Series Basic Documentation page 293

Software changes of «LC»
Siemens Building Technologies
HVAC Products
21.1.6 «DWminOil» is only valued during the safety time after
a delay time has elapsed
21.1.7 Air pressure switch test valve, inverted control
The signal can be inverted via the relevant parameter.
The output is only active when the fan operates.
21.1.8 External controller contact with «Manually on»
If the burner is in operation with «Manually on», the external controller on contact (X5-03
Pin1) acts as a shutoff device should overtemperatures occur.
With the exception of operating mode 1 (extLC), the controller contact can be deacti-
vated if not used as a switch-off device.
21.1.9 Prepurge time after safety shutdown
After safety shutdown, the longer prepurge time «PrepurgeSafeGas/Oil» becomes ac-
tive.
21.1.10 Changes to the supplied parameter set
The parameter set has been changed from V20.02.00 to V20.03.00.
The software of the basic card has been changed from V02.20 to V02.30.
The following changes have been introduced:
21.1.11 Driving to the low-fire positions
After ignition, first the positions of curvepoint P1 will be approached, independent of
whether or not the minimum load has been set to a higher value. Once the positions of
P1 are reached, the set minimum load will be approached.
21.2 Basic unit LMV52...
Introduction of serial software version V01.10.
21.3 Load controller card
The software of the load controller has been changed from V01.40 to V01.50.
The following changes have been made:
21.3.1 Auxiliary sensor for cold start thermal shock protection
21.3.2 Straightforward changeover of operation to internal
load controller
Using a potential-free contact at terminals X62.1 and X62.2, it is possible to switch from
external load controllers to the internal load controller of the LMV51.100...
The following operating modes can be switched over:
Operating mode 4 → 2
→ 2
Operating mode 5
Operating mode 3 → 2
→ 2
Operating mode 6
→ 2
Operating mode 1
Basic Documentation LMV5...
21 Revision history
= Int LC X62 → intLC
→ intLC
= Ext LC X62
= Int LC Bus → intLC
→ intLC
= Ext LC Bus
→ intLC
= Ext LC X5-03
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CC1P7550en
13.08.2004