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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 21 Revision history 13.08.2004
21 Revision history
The new release of the basic unit is identified by the series letter B in the type reference
(LMV51.XXX
BXXX).
• When changing from A-series to B-series units, the parameter sets can be copied
• The added parameters are preset in a way that they correspond to the former func-
tioning mode
• An update to a new unit, which is no longer in the state supplied, should not be
made since it is only the parameters from the A-series that can be stored back
• The compatibility of the load controller must be set manually, with the sign reversed
• Due to the change to the external analog predefined load and to the analog load
output (LR V01.50), it may be necessary to make adaptations on the associated ex-
ternal controllers or BACS (building automation and control system)
21.1 Basic unit LMV51...
The software of the basic card has been changed from V02.10 to V02.20.
The following changes have been made:
21.1.1 Program stop
When the unit reaches the «Program stop» position, the AZL5... will display «Pro-
gramstop active».
21.1.2 Deactivating the alarm
The alarm relay can be deactivated via the menu of the AZL5…, which means that the
actual lockout or start prevention will be maintained.
Deactivation remains active until the next lockout reset, system reset or startup occurs.
Then, normal alarming will be resumed, that is, deactivation of the alarm applies to the
current alarm.
21.1.3 «GPmin» in the oil program
«GPmin» can also be activated for the oil program only.
21.1.4 «SV» oil, switch-off time
In the case of oil-firing, the external «SV» valve closes on completion of the permissible
afterburn time (end of Phase 70).
The burner motor operates until Phase 79 is reached.
Using the relevant parameter, it is now possible to choose between the present function
(when using the magnetic clutch) and direct coupling of the oil pump.
In that case, the «SV» oil must be connected to the output for the oil pump (X6-02).
This output is not safety-related and is not used in the case of direct oil pump coupling.
The «SV» oil (X6-02) is always controlled when the fan runs, plus another 15 seconds.
21.1.5 «DWminOil» in program «Heavy oil with gas pilot»
Valuation of input «DWminOil» in program «Heavy oil with gas pilot» has been moved
from Phase 38 to Phase 44.
Notes on compatibility
Software changes
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