Lucent Technologies 555-661-140 manual Environment, Ventilation

MERLIN LEGEND Communications System Release 6.1	Issue 1
Installation 555-661-140	August 1998
Installing the Control Unit	Page 2-2
Overview

The following sections provide detailed instructions for these installation procedures. Follow the procedures in the order in which they are presented.

Environment

The control unit must be installed on a backboard. The placement of the backboard, and the control unit on it, requires careful consideration. Make sure you install the backboard in an area that meets all of the environmental requirements listed in Table 2–1.

Table 2-1. Environmental Requirements

Operating	40o–104oF (4o–40oC)
Temperatures	Optimal temperature: 60oF (15.6oC)
Humidity	20%–80%
Airborne	Do not expose the control unit to moisture, corrosive gases,
Contamination	dust, chemicals, spray paint, or similar material.
Ventilation	Allow at least 1 in. (2.54 cm) on the right and left sides of the
	control unit and at least 12 in. (30.48 cm) above and below it
	to prevent overheating.
	Do not place the control unit near extreme heat sources (for
	example: furnaces, heaters, attics, or direct sunlight).
Electrical Fields	Do not expose the control unit to devices that generate
	electrical currents causing interference (such as arc welders
	or motors).
Heat	Basic carrier: 500 Btu/hr
Dissipation	Basic carrier: with one expansion carrier 1000 Btu/hr
	Basic carrier: with two expansion carriers 1500 Btu/hr