GPC COMPRESSOR CONTROL
Precise and Efficient control
The RCS range of GPC compressor and condenser controllers provide efficient control of the refrigeration compressor plant, whilst ensuring optimum use of energy and maintaining minimum refrigerant charge
- Dual compressor and condenser control
- Simple to configure
- Floating head pressure  optimization
- Dual circuit capability

 
The GPC Range
GPC97 -  Controls up to 8 3-stage compressors and up to 12 stages of condenser cooling
Dual LT / HT circuit capability
GPC2000 -


Controls up to 4 3-stage compressors and up to 12 stages of condenser cooling
Total Control

The RCS GPC compressor and condenser controller provides efficient control for single or multiple stage compressors, together with multiple condenser fan systems.
Easy configuration of the system allows selection of a large variety of compressor and condenser combinations.
Condensers have an option of floating head pressure control, allowing system optimization.
A night time setback facility is available.		 Image33.gif (22608 bytes)
System Integration

The RCS GPC compressor condenser controllers can be used as stand alone units, and may be interrogated using the RCS Hand Held Unit. They

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 can also be connected to the RCS System Manager via the RS485 network. This provides remote interrogation and setup facilities, as well as recording alarms and logging data.
Individual Control

The electronics package comprises of a control board and LED display, and can be supplied in an enclosure or board only format.
The GPC97 controller requires separate I/O relays for control of high voltage contactors. The GPC2000 controller is supplied with integral relays for direct connection to contactors.
The GPC controller also supports a number of different types of pressure transducers.

 

GPC COMPRESSOR CONTROL
Technical Specification


Common Features of controllers in the GPC Range

Power Supply-                    
Available with mains PSU
Environment-
0°C to 40°C, 30% to 85% RH (non-condensing)

Temperature Inputs-
Eight Thermistor input channels for measuring suction, discharge, condenser temperatures, etc.

Pressure Inputs-
Up to three pressure sensor inputs, LT suction, HT suction and common discharge. 4-20mA or 0-10vdc versions available

Digital Outputs-
Up to 40 digital output channels available, GPC2000 has integral output relays

Digital Inputs-
Up to 16 contact sensing digital inputs for monitoring compressor status, etc.

Display-
Three 3½ segment LED displays for local indication of suction and discharge pressures, with 28 status LEDs

System Manager Communications-
The unit is linked to the RCS System Manager via an RS485 2-wire connection for data collection, alarm handling and remote
interrogation.
Supports the RMS protocol

Setup-
Default operational values are selected via bit switch settings.
The unit can also be setup from the RCS System Manager, or using a Hand Held Unit.
The unit operating settings and real-time clock are backed up by battery in the event of power failure. Operating settings are
also automatically backed-up by the RCS System Manager

Mechanical-
Available in a board only format for integration into clients own control panels, or in a robust metal enclosure.

GPC97 Compressor and Condenser controller features-

Enclosure-
Steel enclosure
300 x 260 x 75 mm

Analogue Inputs-
HT Suction Pressure
HT Suction Temperature
LT Suction Pressure
LT Suction Temperature
Common Discharge Pressure
Common Discharge Temperature
Condenser Air On and Air Off
Water in / Water out from heat reclaim

Digital Outputs-
Outputs to control up to 8 compressors each with a maximum of 3 stages
6 Condenser fan outputs
Gas dump valve, heat reclaim, etc.

Digital Inputs-
Compressor Status inputs
Fan Fault
BMS Demand, etc.