Purpose of the Document
This document applies to the series of precision air conditioners and cooling solutions which maintain optimal
environmental control of technological ecosystems at minimal operating costs. This document gives an
overview of the specications, installation, commissioning, and maintenance procedures with troubleshooting
from the user perspective. The gures used in this document are for reference only.
Please read this manual carefully before installing, maintaining, and troubleshooting.
Liebert PEX4 Air-cooled precision CRAC is a professional device, only professionals are permitted to access the
unit and is kept in a place where access is restricted to common people.
Styling used in this Guide
The styles used in the manual will be dened as mentioned in the following table:
Situation Description
Warning/Danger/Cauon
• The Warning/Danger/Caution note indicates a hazardous or potentially
harmful situation that can result in death or injury. It also indicates in-
structions that need to be adhered to, failing which may result in danger
and safety issues thereby having an adverse eect on the reliability of
the device and security. Even for practices not related to physical injury,
to avoid equipment damage, performance degradation, or interruption in
service, follow the warning instruction, carefully.
Note
• The Note section indicates additional and useful information. It also calls
attention to best practices and industry-best protocols that are
standardized and help make maximum utilization of the resources at
hand. Helpful information related to the product also comes under the
Note heading, helping the users with the denitions, concepts, and
terminologies used in the manual.
Version History
Version Revision Date Issue Changes
1.0 08.04.2019
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