Carel pCO2 Manual

Standard Chiller/HP modulare per compressore a vite con driver CAREL
Cod.: +030221241 Rel. 1.0 dated 25 September 03
31
14 Forced capacity control
Inputs used
• Water temperature at evaporator outlet
• Compressor delivery temperature
• Condensation pressure
Parameters used
• High delivery temperature prevention threshold
• High delivery temperature prevention differential
• High pressure prevention threshold
• High pressure prevention differential
• Antifreeze temperature prevention threshold Antifreeze temperature prevention differential
• Forced selection of compressor at minimum/maximum power
Outputs used
• All compressor capacity control relays
14.1.1 Description of operation
The compressor forced capacity control function prevents the unit from operating in abnormal conditions of pressure, refrigerated water
temperature or condensation temperature, thus preventing any intervention by specific alarms.
A parameter is provided for selecting the compressor operating mode if forced capacity control is enabled. The compressor can be taken to
minimum/maximum power according to the selection when:
• High delivery temperature threshold exceeded
• High pressure threshold exceeded
• Antifreeze temperature threshold exceeded
Compressor delivery
temperature
Delivery temperature
threshold
Differential
Condensation
pressure
Condensation
pressure threshold
Differential
Evaporator outlet
temperature
Anti-freeze
temperature
threshold
Differential
14.1.2 Compressors with stepped capacity control
For compressors with stepped capacity control, forced capacity control means that the compressor has to operate at minimum or maximum
power according to selection.
14.1.3 Compressors with continuous capacity control.
For compressors with continuous capacity control, forced capacity control means that the compressor has to operate in continuous charging or
discharging mode according to selection.

Carel pCO2 Specifications

General

Brand	Carel
Model	pCO2
Category	Controller
Language	English