14
Researching the requirements
These guidelines should
beused
along with the following tables when
estimating air conditioning requirements. Exact requirements should be
determined by a qualified air conditioning engineer.
El
CAUTION
I
Proper air conditioning
standkds
.
Digital systems require constant power regardless of
the level of system activity (idle or busy) and therefore
generate heat continuously. Ensure that proper air
conditioning standards are met at all times.
Table 6 shows the maximum power dissipation in the form of heat for each
SL-1 Module. These figures apply to both AC- and DC-powered systems.
The power figures listed here do not necessarily correspond to total input
power, since some of the power
-
especially for peripheral equipment
-
is
distributed out to the sets and is not dissipated within the system.
Table 7 shows the maximum heat dissipation for some of the external DC
power equipment supplied by Northern Telecom.
Table 6
SL-1 system heat dissipation
Heat dissipation
Module Watts
BTU/hr
NTSDll
450 1530
Common/Peripheral
Equipment
NT6D39 400 1360
CPU/Network
NT8D34
300 1020
CPU
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Installation planning
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