Quincy Compressor QSI 50 - Page 91

Instruction book
2012 2039 28 91
Text on figures
Number
Timers
Description
1
VSD Maximum Starts Per
Day
The second up to sixth VSD compressor will be seen as a
Fixed Speed compressor running at optimal/ maximum speed.
Since these VSD’s are seen as fixed speed compressors, a
‘Number of starts per day’ is required for the regulation.
2
VSD Maximum RPM
Factor
Percentage of Control VSD Speed; required for the decision to
start/load/unload and stop fixed speed and maximum speed
VSD’s.
3
VSD Minimum RPM Factor
Percentage of Control VSD Speed; required for the decision to
start/load/unload and stop fixed speed and maximum speed
VSD’s.
4
VSD Zero RPM Band
Factor
Percentage multiplied with the ‘Minimum Speed’ to decide that
the Control VSD can be considered as stopped.