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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 9 Electronic air-fuel ratio control 01.12.2009
9.3.5 Restriction of modulation range
If the modulation range shall be further restricted from 20 to 100% against the defined
curve, 2 parameters are available to define a new low-fire and new high-fire position.
No. Parameter
545
Lower output limit
undefined = 20 %
546
Upper output limit
undefined = 100 %
20 % Low-fire
Lower output
limit P545
Upper output
limit P546
100 % High-fire
VSD
Figure 39: Restriction of modulation range
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