COM-SVN003B-EN 7
General Information
Overview
The purpose of this document is to provide installation and
service information for Trane CSHW compressors.
This document is not meant to be provide a step-by-step
procedure, but is intended to identify procedures or
precautions that may be unique to a Trane compressor and
should be taken into account to properly and safely
remove, install, and troubleshoot the compressor.
Each installation has its unique set of circumstances which
also must be taken into account by the service technician.
POE Oil
Oil Handling
POE oil is very hygroscopic, which means it absorbs
moisture very readily. Therefore, it is important to properly
handle the oil.
POE Oil Handling Guidelines
• Always use the smallest container size required for the
job requirements.
• Always leave the oil container tightly sealed until time
of use.
• Do not reuse oil that has been opened.
Oil Level
Single compressor: The oil level should be stable in the
sightglass.
Tandem and trio compressors:
• Operation — The oil level will vary depending on the
operating condition. Some conditions will result in oil
levels below the sight glass.
• Off
— After several minutes, the oil levels should be the
same in each compressor and should be visible in the
sightglass. This is the best method to determine if the
system has sufficient oil.
Units overcharged with oil will operate with degraded
performance and could lead to compressor damage.
Operating Envelope
The compressor must be operated within the published
operating envelope.
Operating Map
Below figure represents the operating map for the CSHW
R-410A model compressors. For proper operation and
reliability, the compressor must always be operated
within the indicated limits shown in the operating map.
This includes both full unit operating map conditions of
the unit, and unit fault modes such as:
• Loss of evaporator air flow
• Loss of evaporator water flow
• Loss of condenser air flow
• Loss of condenser water flow
• Loss of refrigerant charge
Protection devices are required to keep the compressor
within the operating envelop during operation and fault
modes.
Table 1. Oil charge factory
Model Pints Liters
CSHW047 - CSHW073 3.2 1.5
CSHW082 - CSHW089 3.8 1.8
Notes:
1. Oil amount and type is also printed on the nameplate.
2. Use only Trane-approved oils and do not mix oils.
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