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3 Installation
This section covers basic Com-Tech installation pro-
cedures. If your amplifier will be used in a Fire Protec-
tive Signaling application, refer to Section 9 as well.
3.1 Mounting
Com-Tech amplifiers are designed for standard
19 inch (48.3 cm) rack mounting or stacking without a
cabinet. In a rack, it is best to mount units directly on
top of each other. This provides the most efficient air
flow and support. If the rack will be transported, we
recommend that you fasten the amplifier's back panel
securely to the rack to help support the unit's weight.
All Com-Tech amplifiers are 19 inches (48.3 cm) wide,
16 inches (40.6 cm) deep, and 0.25 inches (0.6 cm) in
front of the mounting surface. As you can see in Fig-
ure 3.1, Com-Tech amplifiers vary in their vertical di-
mensions. Figure 3.1 labels the different heights as A,
B and C. These letters correspond to the list that fol-
lows showing Com-Tech models and their vertical di-
mensions.
Height A: 3.5 inches (8.9 cm)
Models: Com-Tech 200 (All)
Com-Tech 400 (North American)
Page 10
Height B: 5.25 inches (13.3 cm)
Models: Com-Tech 400 (100/120 VAC, 50/60 Hz)
Height C: 7 inches (17.8 cm)
Model: Com-Tech 1600 (All)
3.2 Cooling
It is important to understand cooling considerations
when installing a Com-Tech amplifier. First, never
block the amplifier's front or side air vents. This can
cause poor air flow and may result in overheating. If
the amplifier is rack-mounted, its sides should be at
least 2 inches (5 cm) away from the cabinet (see
Figure 3.2). Also, open spaces in the front of the rack
should be covered with blank panels to prevent
improper air flow. Otherwise, heated air from the side
exhaust vents can be drawn into the front air intake
which may greatly reduce the cooling system's
effectiveness.
The real air flow requirement for a Com-Tech amplifier
depends on many things, but the most important factor
is average (RMS) output power. Air flow requirements
increase as output power increases, so anything that
Fig. 3.1 Mounting Dimensions
Com-Tech 200/400/800/1600 Power Amplifiers
Com-Tech 400 (220/240 VAC, 50/60 Hz)
Com-Tech 800 (All)
B L E
E N A
O F F
P
O D E
IO C
S P I
C H 2
C H 1
i n
1 9
m )
. 3 c
( 4 8
. 5 i n
A : 3
)
c m
( 8 . 9
R
W E
P O
i n
. 2 5
B : 5
m )
. 3 c
( 1 3
i n
C : 7
m )
. 8 c
( 1 7
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