Harris DiamondCD Series, Техническое руководство

Страница: 33 / 256

3/6/08 888-2463-001 2-3
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Diamond Series™
Keep in mind that the recommended system is sized only for cooling the transmitter.
Any additional cooling load in the building must be considered when selecting the air
system components.
The transmitter exhaust should not be the only exhaust in the room, as heat from the
peripheral equipment would then be drawn through the transmitter. Additional flushing
air is recommended for the removal of heat from any equipment surrounding the
transmitter. A good guideline is to keep input air no greater than 5°C above ambient.
The maximum transmitter operating temperature is 45°C at sea level (derate 2°C for
each 1000 feet above sea level).
Service Bulletin VHF-140 contains general information on air handling and some tips
for analyzing typical problems in air systems. To obtain a copy of this bulletin, contact
Harris Field Service department.
2.2.5 Electrical Power
The transmitter is designed to operate from 208/240/480 volts, 50/60 Hz. If voltage
variations in excess of +10% are anticipated, the transmitter power input must be
equipped with automatic voltage regulators (optional equipment) capable of correcting
the mains voltage.
AC power to the transmitter should be run in metallic conduit, connected to earth
ground for safety and to provide shielding against interference. All phases should be run
within the same conduit to cancel induced magnetic fields. The power run must be
terminated in a power distribution panel, whose case must also be connected to earth
ground.
2.2.6 Circuit Breaker Selection
Refer to the AC Power Flow drawing in Section 700 of the schematic package for the
connection and breaker information. Each cabinet is fed from the distribution panel
through a separate circuit breaker.
2.2.7 Disconnect Location
The circuit breaker panel should be located near the transmitter in a well lighted area.
As a safety precaution, controls for disconnecting the main power service supplying the
transmitter should be convenient to the operator and/or maintenance personnel. The
controls should be capable of being locked out to prevent accidental turn on during
maintenance periods. Provisions for emergency lighting should be made.