Installation guide

Page 18 • DRI-STEEM GTS Humidifier Installation, Operation, and Maintenance Manual
GTS outdoor enclosure sequence of operation
• Power is applied to the outdoor enclosure.
• If the ambient temperature in the enclosure is below
50 °F (10 °C), the strip heaters are powered up. If the enclosure
temperature reaches 35 °F (2 °C), power is allowed to the GTS
subpanel and the GTS unit is enabled. The strip heaters remain
on until the enclosure reaches 50 °F (10 °C) to ensure that
the temperature inside the enclosure does not drop below the
freezing point.
• When the enclosure temperature is at or above 50 °F (10 °C), the
GTS tank heats the enclosure. When there is no call for humidity,
an aquastat maintains tank temperature at the factory default
of 70 °F (21 °C). This temperature can be reset in the field to be
from 40-180 °F (4-82 °C).
• When the ambient temperature in the enclosure reaches 85 °F
(29 °C), two ventilation fans turn on to cool the electronic
components. A high limit is also provided to power down the
GTS if the enclosure temperature reaches 150 °F (66 °C). In a
high limit situation, the ventilation fans continue to run and once
the enclosure temperature falls below 130 °F (54 °C), the GTS
automatically resumes normal operation.
• A normally open drain valve is provided on the GTS outdoor
enclosure to drain the tank in the event of a power loss.
Outdoor enclosure operation
Installation