Fan Parameters Settable As Load Values Via Qaa75 - Siemens LMS14 User Manual

Key
Building Technologies Division
6.38 Fan parameters settable as load values via
QAA75.../AVS37...
Under certain conditions, the fan parameters for ignition load, low-fire, high-fire, pre-
and postpurging can also be set via the QAA75.../AVS37...
Since these fan parameters lie within the safety-related area and, basically, safety-
related values cannot be changed via the QAA75.../AVS37..., following applies:
The respective parameters are copied and the new parameters filed in the non-safety-
must fulfill the following conditions
related area and
Line no. QAA75...
Required speed prepurging (9504) ≥
Required speed ignition (9512) ≤
Required speed LF (9524) ≥
Required speed HF (9529) ≥ ≤
Prepurge time (9500) ≥
Postpurge time (9540) ≥
Line no. Meaning
9504 N_Vor_QAA Speed required for prepurging (QAA)
9505 N_Vor Minimum speed required for prepurging
9512 N_ZL_QAA Speed required for ignition
9513 N_ZL Maximum speed required for ignition
9524 N_TL_QAA Speed required for low-fire
9525 N_TL Minimum speed required low-fire
9529 N_VL_QAA Speed required for high-fire
9530 N_VL Maximum speed required for high-fire
9500 Tv_QAA Prepurge time
9501 Tv Prepurge time minimum
9540 Tn_QAA Postpurge time
9542 Tn Postpurge time minimum
9551 Maximum fan speed stop
9616 Maximum speed
The change between the 2 parameter groups can be parameterized via a safety-related
flag Release QAA fan param [4337.1]
= Off (QAA setting parameters not enabled)
= On (QAA setting parameters enabled)
User Manual LMS14...
6 The settings in detail
:
Safety-related parameters
Req speed prepurging min (9505)
Required speed ignition max (9513)
Required speed LF min (9525)
Required speed HF max 9530)
Prepurge time min (9501)
Postpurge time min (9542)
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CC1U7471en
28.01.2015