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Building Technologies Basic Documentation LMV27... CC1P7541en
29 Revision history LMV27 17.12.2018
Software version V03.70
Optimization: No locking with C:75 via asynchronous load controller source
Extension: Support of PWM fans and symmetrical feedback
Extension: Increase in the maximum speed to 14000 rpm
Extension: Additional monitoring of the minimum prepurge speed, maximum ignition
speed and minimum speed / maximum speed during operation
Extension: Increased flexibility when setting the curve (gradient VSD curve)
Extension: Operating modes for G / Gp2 with mechanical ratio control (air actuator
only)
Extension: Trim function for e.g. O2 or temperature
Extension: Separate phase for running the fan to ignition speed, postpurge speed or
standby speed, as well as increased speed tolerance outside operation
Extension: Speed-dependent air pressure switch
Extension: Increase in the flame sensitivity
Extension: Gas pressure switch-min positioned after the fuel valves (CSA 149.3)
Extension: Immediate lockout in the event of inadequate air supply (UL 795 / EN
676)
Optimization: No repetition during successive error messages
Extension: At the end of the speed standardization, the speed must be <10%
Extension: Modbus data points
140 = fuel 0 operating mode (parameter 201)
142 = meter for function Revert to Pilot
144 = lower range limit trim function
145 = upper range limit trim function
146 = lower range limit trim function fuel 1
147 = upper range limit trim function fuel 1
148 = input value analog input trim function
149 = current trim impact
150 = absolute speed
151 = standardized mains voltage (conversion required)
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