Generic Requirements for Environmental Control Systems for Electronic Equipment Enclosures
Document Number GR-27
Issue Number 01
Issue Date Dec 1994
Replaces TA-NWT-000027 Issue02
Components of this product are:
ABSTRACT: The Environmental Control System (ECS) is an electronic device with logic circuitry and/or microcomputer components. The ECS monitors
key environmental conditions, such as temperature and humidity in various types of electronic equipment enclosures and regulates these
conditions by operating heaters, ventilation fans, dehumidifiers, air conditioners (A/Cs), and other types of environmental
This document provides the Telcordia view of generic requirements for ECS's. In the Telcordia view, the generic requirements of
this GR must be met to help provide for the safety of telecommunications equipment and personnel working within various types of
electronic equipment enclosures such as Controlled Environmental Vaults (CEVs), Huts and Walk-In Cabinets.
GR-27 replaced TR-TSY-000027 and TA-NWT-000027.
When using GR-27, you may need to refer to ASTM D2197 and UL 94. You may also want to refer to GR-26, GR-43, and/or
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