AT&T 3.0 manual Environment

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	4 00-104°F (4°-400C )
Temperatures	Optimal temperature: 60°F(15.6°C)
Humidity	20%–80%
Airborne	Do not expose the control unit to moisture, corrosive gases, dust,
Contamination	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 12 in. (30.48 cm) minimum, 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 Dissipation	Basic carrier: 500 Btu/hr
	Basic carrier: with one expansion carrier 1000 Btu/hr
	Basic carrier: with two expansion carriers 1500 Btu/hr

WARNING:

Do not install the control unit outdoors.

2-2Installing the Control Unit