Emerson Copeland Scroll SZO44, Installation, Operation & Maintenance Manual

5 

2006SSD-75 R4 (10/10) 

Dual-Compressor Module 

Installation

2.0  i

NstallatioN

2.1  Installation Guidelines

2.1.1  Required Component—Inlet Gas Scrubber

An appropriate inlet gas scrubber is 

REQUIRED

 to remove liquids from the gas prior to compression. If 

there is potential for liquid slugging, a suitable trap must be installed to prevent liquid from flooding and 

damaging the Compressor.

NOTE

Failing to use an appropriate inlet gas scrubber to remove liquids from the gas prior to 

compression can cause flooding and damage the Compressor.

2.1.2  General Installation Guidelines

Follow these general guidelines for installation:

•  The Compressor Module must be installed and operated in compliance with all applicable codes and 

regulations.

•  The system must be installed on a level surface.
•  Install pipe unions or flanges to connect the system to the inlet and discharge piping for ease of 

service.

•  Install isolation valves on the inlet and discharge piping.
•  A common ground must be connected between the Compressor Module and the 

Compressor Package chassis. This ground must comply with the National Electric Code (NEC) and 

any other applicable codes.

•  Solid debris also must be removed from the gas prior to compression. When required, use a 5 to 10-

micron inlet filter to remove debris from the gas stream. The degree of filtration required depends on 

the specific application.

2.2  Inlet and Discharge Pressures

Refer to 

Table 1 

for acceptable inlet and discharge pressure levels. 

Table 1 

Inlet and discharge pressure limits

Type

Level

Operating Guidelines

Minimum Inlet 

Pressure

0.75 psig

Consult the factory for operations below 0.75 psig.

Maximum Inlet 

Pressure

25 psig

Operation at pressures above 25 psig will result in:

•  Excessive oil carryover

•  Loss of oil from the Compressor Module

Discharge 

Pressure 

Range

70 psig

to

190 psig

(depends 

on model)

When the discharge pressure of the Compressor Module reaches the maximum, 

which ranges from 70 to 190 psig, depending on the model (see 

Compressor 

Module Nomenclature

 on page

 iv

):

•  The Compressor Module goes into high discharge pressure recycle if 

equipped. 

•  The Compressor Module’s bypass regulator diverts gas from the high-pressure 

side to the low-pressure side of the module. 

All Compressor Modules must be equipped with pressure-limiting or relief 

devices. A minimum pressure differential of 70 psi between inlet and discharge 

pressure is required for proper operation.