Humidity; Cooling - Hitachi E-Compact Medium Power Series Operation Manual

2.6.2 Humidity.

Relative air humidity inside the shelter is also considered a critical factor for improved
performance and longer equipment life. Hitachi Kokusai Linear equipment should operate
in dry environments, which can also be achieved by the use of air conditioners. According
to the transmission power, the relative humidity inside the shelter should be:
• E-COMPACT LOW POWER TV TRANSMITTERS: 0 to 90%
• E-COMPACT MEDIUM POWER AND HIGH POWER TV TRANSMITTERS: 0 to 80%
There must never be condensation since water can damage the internal circuits of the
transmitter.

2.6.3 Cooling.

Cooling has to be always in "recirculate", with the air conditioning lowering the temperature
of the room, without external air intake. For better performance of the cooling system, the
air conditioner be installed in series with the transmitter cooling cycle, direct the output air
conditioning flow to the front of the Hitachi Kokusai Linear TV Transmitter.
The physical installation of the transmitter should protect a free area around it for better
cooling efficiency and access to maintenance.
E-Compact Medium Power
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