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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
The load parameters converted to speeds are filed in the non-safety-related area and
must meet the following conditions:
Parameter Safety-related parameter
Required speed prepurging (9504) ≥ PrepurgOutpLimOEM [4777.1]
Required speed ignition (9512) ≤
IgnitionOutpLimOEM [4778.1]
Required speed LF (9524) ≥ PartialLoad OutLimOEM [4779.1]
Required speed HF (9529) ≤ HF outp OEM limit [4780.1]
Key
Line no. Meaning
4777.1 P_Vor Output prepurging
4778.1 P_ZL Ignition load output
4779.1 P_TL Low-fire output
4780.1 P_VL Output high-fire
9504 N_Vor_QAA Speed required for prepurging
9512 N_ZL_QAA Speed required for ignition
9524 N_TL_QAA Speed required for low-fire
9529 N_VL_QAA Speed required for high-fire
The values of fan speed (Fan speed heating max (2441), Fan speed full charging max
(2442), Fan sp start value inst WH (2443), Fan speed DHW max (2444) and Controller
delay speed (2452)) are limited to Required speed LF (9524) and Required speed HF
(9529).
The linear equation y = m*x +b with m = Fan output/speed slope (9626) and b = Fan
output/speed Y-section (9627) is used to calculate the required speed based on the
preset output.
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