www.DaikinApplied.com 63 IOM 1274-3 • CENTRIFUGAL WATER CHILLERS
The following tables list analog inputs and digital outputs for the compressor controller as well as the stepper motor outputs.
Table 28: Compressor Controller, Analog Inputs
Description Source Signal Sensor Range
Oil Sump Pressure 0.5 to 4.5 VDC nominal
Oil Feed Pressure to Compressor 0.5 to 4.5 VDC nominal
Oil Sump Temperature 10k @ 25°C -40 to 125°C
Oil Feed Temperature 10k @ 25°C -40 to 125°C
Compressor Suction Temperature NTC Thermistor 10k @ 25°C -40 to 125°C
Compressor Discharge Temperature NTC Thermistor 10k @ 25°C -40 to 125°C
Evaporator Suction Refrigerant Pressure Sealed Gage Transducer 0.5 to 4.5 VDC nominal 0 to 132 psi
Condenser Discharge Refrigerant Pressure Sealed Gage Transducer 0.5 to 4.5 VDC nominal 0 to 410 psi
Motor Current Sealed Gage Transducer 0 to 10 VDC nominal 0 TO 200%
Leaving Evaporator Water Temperature NTC Thermistor 10k @ 25°C -40 to 125°C
Table 29: Compressor Controller, Digital Inputs
Description Signal States (Open / Closed)
0 to 24 VAC Stop / Auto
Mech High Pressure 0 to 24 VAC High Pressure / Ok
Motor High Temperature 0 to 24 VAC High Temp / Ok
Vanes Closed Switch 0 to 24 VAC Not Closed / Closed
Starter Transition 0 to 24 VAC No Transition / Transition
Starter Fault 0 to 24 VAC Fault / No Fault
Evaporator Water Flow Switch 0 to 24 VAC No Flow / Flow
Condenser Water Flow Switch 0 to 24 VAC No Flow / Flow
Vanes Open Switch 0 to 24 VAC Not Open / Open
Table 30: Compressor Controller, Analog Outputs
Description Signal Sensor Range
Compressor VFD Speed 0 to 10 VDC 0 to 100%
Oil Cooler Electronic Valve 0 to 10 VDC 0 to 100%
Hot Gas Bypass 0 to 10 VDC 0 to 100%
Table 31: Compressor Controller, Digital Outputs
Description Source Output OFF Output ON
Compressor Motor Control Relay Relay Compressor OFF Compressor ON
Hot Gas Bypass Solenoid No Bypass Bypass
Liquid Injection Solenoid No Injection Injection
Oil Pump Contactor Pump OFF Pump ON
Oil Sump Heater Relay Heater OFF Heater ON
Vane Pulse Solenoid Hold Move Vanes
Vane Load/Unload Solenoid Unload Load
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