C6.1.7/1110-0519/E
7
2.7.6 Solenoid valve for Copeland Scroll Digital compressor
Copeland Scroll Digital compressors in HLR Digital Receiver units are equipped with a 24-volt AC
solenoid valve. The electronic controller operates the solenoid valve used for digital compressor
modulation based on the suction pressure.
2.7.7 Oil separator: Alco Controls OSH
The Alco Controls OSH-407 oil separator is fitted as standard on tandem-compressor Digital
Receiver units. The oil separator has the following characteristics:
▪
Hermetic construction
▪
Complies with UL standard and HP German pressurised vessel regulations (CE standard
effective Nov. 1999)
▪
PED category I
NOTE: The oil separator is not charged with oil. The installer has to charge the system
during the first hours in operation. Please refer to section 4.1 "Charging procedure".
2.8 Electronic controller EC2-552
The EC2-552 electronic condensing unit controller is mounted as standard in all HLR Digital
Receiver units, whether with one or two compressors.
The electronic controller enables:
▪
compressor modulation and/or staging based on suction pressure;
▪
TCP/IP Ethernet connection with web server functionality, to allow monitoring and configuration
of controllers through a standard web browser;
▪
alarm messaging by email;
▪
fan speed control if an Alco Controls FSP150 fan speed controller is installed.
Figure 3: Electronic controller EC2-552
The controller has been pre-programmed with a number of parameter values that are most likely
correct. Individual installation requirements however may make it necessary to alter parameter
settings.
The control target of the compressor controller (1) is to maintain the suction pressure at a defined
value by varying the available compressor capacity.
The control target of the condenser controller (2) is to maintain the condensing pressure at a
defined value. This is done by varying the fan speed, if fan speed control is installed.
2.8.1 Select parameter configuration
The configuration parameters can be protected by a numerical password. A value of "0" disables
this protection (default password: 12).
To select the parameter configuration:
➔
Press the
Prg
button for more than 5 seconds.
Controller 2: Fan
Value to be displayed:
LED ON: pressure
LED OFF: temperature
Active alarm
)
Compressor 1: On
Fan: On
Compressor 2: On
IR service LED
Controller 1: Compressor
