DriSteem Vapor-logic 4 User Manual

1BHFt%3*45&&.7BQPSMPHJD*OTUBMMBUJPOBOE0QFSBUJPO.BOVBM
4UFQo'JFMEXJSJOH
$POUSPMJOQVUTJHOBMT
DRI-STEEM offers three control options for all its humidification
systems controlled by Vapor-logic4: 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 where there are multiple contactor outputs, such as
an electric element humidifier, contactors for each heat stage are
pulled in one at a time with a one-second delay between them. In
applications with a variable output stage, such as a GTS humidifier,
the outputs are ramped up until they reach 100%.
Installation

DriSteem Vapor-logic 4 Specifications

General

Brand	DriSteem
Model	Vapor-logic 4
Category	Controller
Language	English