Analog Outputs
BOARD | I/O # | DESCRIPTION | TYPE |
# | | | |
10 | 1 | Compressor VFD | 4-20 mA |
10 | 2 | Condenser VFD | 4-20 mA |
10 | 3 | % Slide Valve Position | 4-20 mA |
10 | 4 | Motorized Valve (Cool Compression or Liquid Injection), V+ | 4-20 mA |
10 | 5 | Profile Cooler VFD (Profile only) | 4-20 mA |
10 | 6 | | |
10 | 7 | | |
10 | 8 | | |
| | | |
COMPRESSOR VFD – 4-20mA output to control compressor motor speed with a Variable Frequency Drive (VFD).
CONDENSER VFD – 4-20mA output to control one condenser fan which is interleaved between the remaining condenser steps for smoother control.
%SLIDE VALVE POSITION – 4-20mA signal that transmits the slide valve position for remote monitoring.
MOTORIZED VALVE (V+) – for a cool compression compressor, this 4-20ma signal controls a motorized valve to regulate the liquid refrigerant level in the oil separator. For a liquid injection application on a standard single screw, this 4-20ma signal controls a motorized valve to regulate the liquid refrigerant injected into the compres- sor for oil cooling purposes.
PROFILE VFD – for a profile unit compressor, this signal controls the aftercooler fan speed which provides oil cool- ing.
