14
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
