Fan Parameters Accessible Via Qaa - Siemens LMU54 Series Basic Documentation

Boiler management unit (bmu)
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Fan parameters
accessible via QAA
Note
Siemens Building Technologies
HVAC Products
Under certain conditions, the fan parameters for ignition load, partial load and full load
can also be set via the QAA73... (parameter «FaEinstellFlags3»).
Since these fan parameters are safety-related and – as a general rule – safety-related
values cannot be readjusted via the QAA73..., following applies:
• The relevant parameters will be copied and the new parameters filed in the non-
safety-related range
• Changeover between the 2 parameter groups can be parameterized via a safety-
related flag (FaEinstellFlags3)
Changeover to the QAA fan parameters is only permitted under certain preconditions:
1. Capacity range < 70 kW.
2. Changeover only possible on the OEM level or higher.
For the new parameters, the usual fan parameter checks are made (same as with the
previous parameter group).
Listing of both parameter groups:
Parameters on QAA
LmodZL_QAA
LmodTL_QAA
LmodVL_QAA
N_ZL_QAA
N_TL_QAA
N_VL_QAA
When setting these parameters, the following general conditions must be observed:
QAA parameters:
LmodZL_QAA
LmodVL_QAA
LmodTL_QAA
N_ZL_QAA
N_VL_QAA
N_TL_QAA
When, in the following, reference is made to one of the safety-related parameters, it is
also possible that the corresponding QAA parameter is meant (depending on the
parameterization).
Basic Documentation LMU54... / LMU64...
3 Functions
Safety-related parameters
LmodZL
LmodTL
LmodVL
N_ZL
N_TL
N_VL
CRC-protected parameter:
LmodZL
LmodVL
LmodTL
N_ZL
N_VL
N_TL
25/171
CC1P7494en
07.11.2002

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Lmu64 series

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