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Operation
Freeze protection
Freeze protection is similar to aquastat operation with some
exceptions. The freeze protect set point is fixed at 40 °F (4 °C). Its
purpose is to prevent the tank from freezing in cold environments.
Unlike aquastat, if a condition exists that prevents the heaters,
burners, and valves from firing (such as an alarm, an external
interlock switch is open, or the humidifier is in Standby mode),
instead of remaining idle, the controller switches to manual drain
run mode and the tank drains to prevent freezing. Change mode to
Auto to resume operation.
When the tank is heating to prevent freezing, the word “Heating”
appears on the Home screen. When the tank is draining or has
drained to prevent freezing, the “Freeze drain” message appears
in the Messages Log and the Message softkey label becomes
highlighted.
Fan-based dispersion operation
If your humidifier is equipped with a Space Distribution Unit
(SDU) or an Area-type fan, it is enabled after the Vapor-logic4
controller receives a call for humidity and the tank water is
approaching boiling temperature.
When the humidifier no longer receives a call for humidity, it stops
heating and the SDU or Area-type fan continues to run for the
time delay period (as defined in the fan-based dispersion section
Setup menu).
Sensor offsets
All external transmitters shipped with Vapor-logic4 can be field
calibrated from the Setup menu. For example, if the system is
equipped with an RH transmitter, there is an RH offset setting.
The factory default for all transmitter offset settings is zero. The
sensors that have this adjustment capability are the humidity, duct
high limit, temperature compensation, and dew point transmitters.
F r e e z e p r o t e c t i o n , f a n o p e r a t i o n ,
s e n s o r o f f s e t s
Содержание Vapor-logic 4
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