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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
40
0
-104°F (4°-40
0
C)
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
Basic carrier: with
WARNING:
one expansion carrier 1000 Btu/hr
two expansion carriers 1500 Btu/hr
Do not install the control unit outdoors.
2-2 Installing the Control Unit