Service manual

Installation: Pre-Installation Considerations 2-3
2.1.3 Equipment Ventilation
The base stations/repeaters are equipped with cooling fans that are used to provided forced
convection cooling.
When planning the installation, observe the following ventilation guidelines.
• Mounting the MTR3000 base station/repeater in a cabinet
- Cabinets must be equipped with ventilation slots or openings in the front (for air entry) and
back or side panels (for air to exit). If several base stations/repeaters are installed in a
single cabinet, be sure ventilation openings surround each base station/repeater to allow
for adequate cooling.
- All cabinets must have at least 15 cm (6 in) of open space between the air vents and any
wall or other cabinets. This allows adequate air flow.
- When multiple cabinets (each equipped with several base stations/repeaters) are installed
in an enclosed area, make sure the temperature within each cabinet does not exceed the
recommended/maximum operating temperature of +60°C (+140°F). It may be necessary to
have air-conditioning or other climate-control equipment installed to satisfy the
environmental requirements.
IMPORTANT: The mounting of only ONE BASE STATION/REPEATER PER CABINET
is recommended. More than one base station/repeater per cabinet will
result in degradation of thermal specifications at high ambient
temperatures.
Appropriate precautions should be taken to ensure that base station/
repeater ambient temperature does not exceed +60°C (+140°F).
If multiple base stations/repeaters are required, AND THERMAL
SPECIFICATION DEGRADATION IS ACCEPTABLE, the following is
recommended when no cabinet fans are used. Up to three base stations/
repeaters can be mounted in a 76.2 cm (30 in) or larger cabinet with two
rack units of spacing between each base station/repeater. This will result
in thermal specification performance of
-30°C (-22°F) to +40°C (+104°F).
• Mounting the MTR3000 base station/repeater in a Rack
Multiple MTR3000 base stations/repeaters can be mounted in an open rack
without degradation of specification. To maintain thermal specifications for
equipment including the X621BF option, MTR3000 base stations/repeaters
require one rack unit of spacing between base stations/repeaters. For base
stations/repeaters with the X621BF option installed, with no spacing, the base
stations/repeaters' ambient temperature may not exceed +55˚C (+131˚F).
C a u t i o n