Page 2
Telect, Inc. • USA +1.509.926.6000 • 52.33.3836.37.52
www.telect.com • © 2011 Telect, Inc., All Rights Reserved, 139249-1 A0
1.4 IMPORTANT INSTALLATION GUIDELINES
ALERT
!
ALERT! It is absolutely IMPERATIVE that you understand and follow these guidelines.
A. Rectifier Load Limits
The enclosure ships from the factory with three
TRM-48M
rectifiers (1800W @ 92%
efficiency), providing a system design load capacity of 75A with N+1 redundancy.
If you connect equipment such as 2G BTS units, etc., in addition to Node B and AAV
equipment, then it is possible to exceed this system design limit. In such scenarios, it is
necessary to use
TRM-48ES
high efficiency rectifiers (2000W @ 96% efficiency). In such a
case, you MUST replace the existing TRM-48M rectifiers with TRM-48ES rectifiers and add
the appropriate number of additional TRM-48ES rectifiers up to the new system load design
of 160A plus N+1 redundancy.
B. Active Thermal Load Limits
Whenever you plan the 6RU equipment zone below the divider panel, you must consider the
following: When you install equipment you must adhere to the compartment’s thermal load
limits. The estimated* thermal budget associated with the installation of ancillary equipment
in this enclosure is 100W MAX, based on 38
o
C ambient and 40
o
C internal temperature.
*Telect MUST review the actual equipment configuration to confirm the thermal acceptability
of the equipment that you intend to install in this zone.
Consider your thermal budget and the manufacturer’s equipment requirements. Install
the equipment in an environment compatible with the maximum temperature specified by
the manufacturer.
Air flow
: For safe operation of the equipment in the 6RU zone, make sure that the
installed equipment conforms to the manufacturer’s equipment requirements for air flow.
C. Circuit Review
Determine the number of MDS modules required for installation and order the appropriate
number of MDS modules. Also be sure to buy the appropriate breaker sizes associated with
your circuit requirements. See Section
for details.
D. Grounding on the Front of the Enclosure
When you attach the ground ring to the enclosure frame, it is CRITICAL that you thoroughly
coat any exposed metal with No-Ox compound. See
