Emerson SCROLL SZO44 - Manual (Page 9)

3 2006SSD-75 R4 (10/10)
Dual-Compressor Module Introduction
1.0 i
NtroduCtioN
The Copeland Scroll ® SZO44 Compressor Module comes equipped with two Copeland Scroll ®
Compressors designed for Class I, Division II applications. The Compressor Module is designed for
assembly into a Compressor Package ready for service in the field; the completed housing is done by
equipment Packagers. This section provides an overview of these components.
These terms are used throughout this manual:
• Compressor Module - the SZO44 Compressor Module shown in Section 1.1
• Compressor - a Copeland Scroll ® Compressor (two per Compressor Module)
• Compressor Package - the entire assembly, including the Compressor Module, ready for service in
the field
• Packagers - the company that prepares the Compressor Module for service
• VFD - Variable Frequency Drive used to power a variable speed Compressor Module
1.1 The Compressor Module
The Compressor Module consists of two Compressors and the other components shown in Figure 1.
Figure 1 Compressor Module Components
Oil coolers with fans (2)
Oil circuit
filter
Oil circuit
thermal
bypass valve
Copeland Scroll ®
compressors (2) for
Class I, Divison II
First-stage
oil separator
Oil level
sight tube
Fan speed
thermistor
High discharge
gas temp switch
High discharge
gas pressure switch
Inlet suction screen Inlet check valves (2)
LEFT
SIDE
VIEW
Suction gas connection
(1-1/2" NPT)
Control wiring
terminations
Power wiring
terminations
Second-stage
separator
Discharge gas
connection (1" NPT)
Oil cooler
fans (2)
RIGHT
SIDE
VIEW