Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Installing the Control Unit
Page 2-2
Overview
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
.
!
WARNING:
!
Do not install the control unit outdoors.
Table 2-1. Environmental Requirements
Operating
Temperatures
40
o
–104
o
F (4
o
–40
o
C)
Optimal temperature: 60
o
F (15.6
o
C)
Humidity 20%–80%
Airborne
Contamination
Do not expose the control unit to moisture, corrosive gases,
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
Dissipation
Basic carrier: 500 Btu/hr
Basic carrier: with one expansion carrier 1000 Btu/hr
Basic carrier: with two expansion carriers 1500 Btu/hr