DESCRIPTION OF INPUTS / OUTPUTS
ANALOGUE INPUTS
Probes
1.
CONTROL :
used as the main controlling probe based on which the setpoint will
regulate the system.
2.
Condenser Inlet
: Senses Condenser Inlet temperature
3. Condenser
Outlet:
Senses Condenser Outlet temperature.
4.
Water Inlet
: Senses Water (CHILLER) Inlet temperature
5.
Water Outlet
: Senses Water (CHILLER) Outlet temperature
6.
Antifreeze
: Used to trip compressors below AFT set point .
DIGITAL INPUTS
Controller manages the following protections :
-
High Pressure trip for the compressor1(HP1)
-
Low Pressure Trip for the compressor1.(LP1)
-
Compressor Overload trip1(COMP O/L1)
-
OSS - Oil Safety Switch (OSS1)
-
Single Phase Preventor Trip1(SPP1)
-
High Pressure trip for the compressor2(HP2)
-
Low Pressure Trip for the compressor2.(LP2)
-
Compressor Overload trip2(COMP O/L2)
-
OSS - Oil Safety Switch (OSS2)
-
Single Phase Preventor Trip2(SPP2)
-
High Pressure trip for the compressor3(HP3)
-
Low Pressure Trip for the compressor3.(LP3)
-
Compressor Overload trip3(COMP O/L3)
-
OSS - Oil Safety Switch (OSS3)
-
Single Phase Preventor Trip3(SPP3)
-
Condenser Fan1 O/L Trip (FAN O/L1 )
-
Condenser Fan2 O/L Trip (FAN O/L2 )
-
Condenser Fan3 O/L Trip (FAN O/L3 )
-
Pump Overload Trip
-
Evaporator Water Flow Switch Trip
The controller informs the user of a fault condition via a buzzer and an ALARM-
RELAY.
DIGITAL OUTPUTS (RELAY)
1.
Chiller Pump
2.
Compressor1
3.
Condenser Fan1
4.
Compressor2
5.
Condenser Fan2
6.
Compressor3
7.
Condenser Fan3
