Battery Chamber; Battery Warmer; Wire Ingress Area; Rear Panel And Heat Exchanger - ADTRAN Total Access 3000 Installation And Maintenance Manual

Introduction

Battery Chamber

The vented and isolated Battery Chamber under the Equipment Chamber is accessed by
opening the Equipment Chamber door to expose the battery access panel hold down bolts.
After removing these bolts, the access panel can be lifted away exposing the customer
provided battery string. The Battery Chamber can hold one 4-battery string of rechargeable
12-volt series connected batteries designed for 150 Ahr of duty. Battery terminals are front
mounted. For Battery Chamber features and battery installation, refer to "Chapter 5, DC
Power" in Emerson document 631-205-071.

Battery Warmer

The battery tray in the Battery Chamber is equipped with a battery heater that is separately
powered from dual 15-amp circuit breakers in the AC Load Center. A controller turns the
heater on at temperatures below 40°F and off at temperatures above 60°F.

Wire Ingress Area

Adjacent to the Battery Chamber under the End Chamber are the various grommets and cable
sleeve cones and nozzles for cabinet wiring ingress.

Rear Panel and Heat Exchanger

The cabinet is equipped with a heat exchanger climate control system managed by the ECC.
The ECC is an intelligent system used to sense, control, and report the internal climate of the
cabinet. The ECC monitors thermistor input, heat exchanger fans, and ECC alarm outputs for
high temperature, intrusion, and system failures. For more information on the ECC refer to
"Section 6, Environmental Control Card" of Emerson document 631-205-071.
The rear panel of the cabinet houses the 800 watt heat exchanger and has air intake and
exhaust ducts for exchanging cooling air through the heat exchanger. The counter-flow heat
exchanger isolates outside air from the cabinet interior. A fan at the top of the Equipment
Chamber moves interior air down a duct and through the heat exchanger. The cooled air
exhausts at the bottom of the duct into the chamber to cycle up through the components back
to the top of the chamber. A separate fan moves outside air through a filter and up through
the heat exchanger thereby cooling the internally circulated air. Both cabinet heat exchanger
fans are independent of one another and are separately DC powered and controlled from the
ECC. The Total Access 23-Inch Fan Module Assembly provides additional cooling and air
movement for the stacked Total Access 3000 shelves. The 23-Inch Fan Module Assembly is
DC powered from the Valere Power System.

Standards Compliance

The Hi-Cap RT Solution cabinet is designed to meet all applicable standards including
Telcordia GR-487-CORE, Issue 2, March 2000 Generic Requirements for Electronic Equipment
Enclosures. For more information, refer to Emerson Document 631-205-071.
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