Installation and Maintenance
EHU-600 Series Humidifiers
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An automatic drain cycle blows down mineral-laden water to increase
tank life and reduce maintenance requirements. If the water in the
steam generator is not very conductive it will reach the high water
level. The drain duration is adjusted based on how often the high water
level is reached.
An overcurrent protection circuit will drain water from the tank to reduce
current flow and then de-energize the contactor to stop current flow if
overcurrent still exists.
The EHU-600 Series has a patented self-regulating maximum output
feature that eliminates manual adjustment and improves humidity
control. In low demand situations, units with greater capacity can quickly
overshoot setpoint because a fraction of the output satisfies the
requirement. This on-again/off-again behavior is called "hunting" because
the unit has difficulty attaining setpoint. The EHU-600 Series
automatically adjusts maximum output up or down depending on the
humidity demand history. If this feature is not desired it can be easily
over ridden by changing the position of jumper BJ3 on the printed
circuit board from CAPY STEP/NORMAL to CAPY STEP/TEST.
Make sure main power is turned off whenever changing jumpers
on PC board.
