Humidity; Cooling - Hitachi E-Compact High 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. Comark equipment should operate in dry
environments, which can also be achieved using 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 must be always in circulation, with the air conditioning lowering the temperature of
the room, without external air intake. For better performance of the cooling system, the air
conditioner must be installed in series with the transmitter cooling cycle, directing the
output air conditioning flow to the front of the Comark transmitter.
The physical installation of the transmitter should protect a free area around it for better
cooling efficiency and access to maintenance. See image below:
E-Compact HP-BB3 Series
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