Product Description; Copeland Eazy Cool ™ Condensing Units For Refrigeration Networks; Network Configurations; Product Nameplate - Emerson Copeland EazyCool OMQ-56-Nxx-TWD Series Application Manuallines

2

Product Description

2.1 About Copeland EazyCool™ condensing units for refrigeration
networks
Copeland has developed a special version of Copeland EazyCool condensing units that
can be used to create medium and larger size refrigeration network systems. The range
consists of Copeland EazyCool condensing units for medium and low temperature
applications and covers units from 7.5 to 15 hp. It includes units with two compressors,
allowing modulation in two steps as well as Copeland EazyCool Digital Scroll™
Condensing Units, which feature continuous modulation from 10 to 100%.
The concept of a condensing unit refrigeration network is based on connecting up to four
condensing units mechanically (tubing) and electronically (control system). The control
and oil distribution system is a Master/Slave configuration in which the Master unit takes
care of:
Compressor staging based on suction pressure
Oil distribution (oil reservoir in master unit)
Communication for remote monitoring
The Slave unit takes care of:
Fan speed control
And emergency control in case of communication line disruption between the unit
(master/slave)
Each Network should have only one master unit.
2.2

Network configurations

Basically there are three different configurations possible: two-unit network, three-unit
network and four-unit network. The three and four condensing unit network requires an
external receiver. Copeland offers a LRU (Liquid Receiver Unit) which contains a 90 l
receiver. If a larger receiver is required, this should be obtained from a third party. The
two-unit network consists of units with internal receivers, which allow faster installation.
2 Unit Network 3 Unit Network with LRU
2.3

Product nameplate

The condensing unit nameplate shows model designation and serial number.
The compressor has its own nameplate with all electrical characteristics.
The medium temperature range features ZB Scroll compressors, some models include a
Digital Scroll™ compressor.
The low temperature range features ZF Scroll compressors with vapour injection using a
pre-installed sub-cooler.
C6.1.4/0305/E
Condensing Unit For Refrigeration Networks
4 Unit Network with LRU
LRU: Liquid Receiver Unit
4 Part no: 3136433