User Manual

Preinstallation RF-Orchestra!™ Transmitter Installation and Operation
3-6 6880493G02-C July 2000
Environmental Considerations
The environmental considerations include the temperature control, humidity control, and air
cleanliness conditions described in this section.
Temperature Control
Excessive and extreme temperatures can reduce the life span of the RF-O! paging station and
cause permanent damage.
To combat temperature problems, a Heating, Ventilation, Air-Conditioning (HVAC) system is
recommended. All HVAC systems must be thermostatically controlled and capable of
automatically switching between heating and cooling modes in response to the thermostat.
The environmental equipment must maintain the desired environment to meet the equipment
heat dissipation requirements.
Note: The heat dissipation requirements in British Thermal Units (BTUs) can be calculated by
multiplying the power rating of the equipment by a factor of 3.414 for each hour. For example,
if a piece of equipment has a power rating of 300 watts, the heat dissipation is equivalent to
1024.2 BTUs (300 x 3.414 = 1024.2) for each hour. A redundant HVAC system may also be
installed. The system must be wired on a delayed circuit to prevent both HVAC systems from
starting up simultaneously.
Existing building HVAC systems may be programmed to turn off during unoccupied hours.
This type of HVAC system must be evaluated to ensure that the site temperature will be
maintained continuously.
Humidity Control and Air Cleanliness
Take proper measures to ensure that the site meets the required conditions. The relative
humidity within the site should be less than 95% at +50 ˚C (+122 ˚F) non-condensing.
CAUTION
If the station is to be installed in an environment that is unusually dusty or dirty,
(thus not meeting air quality requirements), the air used to cool the station modules
must be treated using appropriate filtering devices. Dust or dirt accumulating on the
internal circuit boards and modules is not easily removed and can cause such
malfunctions as overheating and intermittent electrical connections.