Carel pCO2 Manual

Standard Chiller/HP modulare per compressore a vite con driver CAREL
Cod.: +030221241 Rel. 1.0 dated 25 September 03
3
1 APPLICATIONS AND FUNCTIONS PERFORMED BY THE SOFTWARE
Type of control unit
AIR / WATER CHILLER
• Chiller only
• Chiller + Heat pump
• Chiller + Freecooling
WATER / WATER CHILLER
• Chiller only
• Chiller + Heat pump with gas reversing
• Chiller + Heat pump with water reversing
Type of control
Proportional or proportional + integral control on the evaporator water inlet temperature probe.
Time control of the neutral zone on the evaporator water outlet temperature probe.
Types of compressors
Screw compressors with 4 capacity control steps
Screw compressors with continuous duty capacity control.
Maximum number of compressors
From 1 to 4 with a maximum of 4 capacity control steps (1 compressor for every pCO*)
From 1 to 4 with continuous duty capacity control. (1 compressor for every pCO*)
Compressor duty call rotation
Rotation of all compressors to FIFO logic for stepped and continuous duty capacity control.
Condensation
Condensation can be performed according to temperature, pressure or ON/OFF
Fan management in stepped mode or with 0/10 Volt proportional signal
Type of defrosting
Overall defrosting of all pCO units connected to network: Independent/Simultaneous/Separate
Safety devices for all refrigerating circuits
High pressure (pressure switch/transducer)
Low pressure (pressure switch/transducer)
Oil/Oil Level differential pressure switch
Compressor thermal cutout
Thermal cutout for condensation fan
High delivery temperature to compressor
Pressure differential alarm
Antifreeze alarm
System Safety devices
Serious alarm input (shuts down entire unit)
Flow-switch input for evaporator/condenser (shuts down entire unit)
Pump thermal cutout input (shuts down entire unit)
Remote ON/OFF input.
Other functions
Alarms logging
Built-in terminal management (on pCO² only)
Management of ratiometric probes for pressure control (on pCO
1
only)
EVD driver for piloting the EXV valve.
Multilingual management.
Accessories
Supervision with serial card RS485 (CARE1 or MODBUS protocol)

Carel pCO2 Specifications

General

Brand	Carel
Model	pCO2
Category	Controller
Language	English