fig.113:
Forward acting capacity control
CV
Control Value
SP
Set point
DB
Dead Band
PB
Proportional Band
PP
Pulse Period
LP
Load Pulse
UP
Unload Pulse
LD
Compressor Loading
UL
Compressor Unloading
If the value of the control signal exceeds the set point, the compressor will use load pulses to move the slide
valve. Conversely, if the value of the control signal falls below the set point, the compressor will use unload
pulses to move the slide valve.
Reverse
Reverse acting capacity control manages the compressor control pulses via a time-proportioning scheme, as
illustrated below.
Control
Screw Compressor Capacity Control
Instruction Manual | GEA Omni™
Control panel
200
GEA Refrigeration North America, Inc. | E_806550_2 | Generated 12.01.2016
Содержание Omni
Страница 1: ...Control panel GEA Omni Instruction Manual E_806550_2 ...
Страница 238: ......