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VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
DriSteem offers three control options for all its humidification systems controlled
by Vapor-logic: On-off control, demand signal control, and transmitter control.
ON-OFF CONTROL
On-off control—the simplest control scheme—does exactly what its name
implies: the output device turns fully on, then fully off.
The humidistat that controls the humidifier has a differential between the on
and off switch points. The differential is established at a range sufficient to
prevent output short cycling. In other words, the humidity level has to fall below
set point before the humidistat closes and energizes the humidifier. Once the
humidifier is energized, the humidistat stays closed until the humidity is above
set point. This creates an operating range that prevents the humidifier from
running for very short periods of time.
In applications with a variable output stage, such as a GTS humidifier, the
outputs are ramped up until they reach 100%.
INSTALLATION
Step 1 – Field wiring: Control input signals
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