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VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
FOAM DRAIN
When foam reaches the top probe of the water probe assembly Vapor-logic
initiates an immediate Foam Drain. The humidifier is not allowed to produce
steam with foam in the tank because the water detection system may read
inaccurately, causing a safety issue. The Foam Drain sequence will drain
the foam, flush the foam out, refill the tank and then restart. The Foam Drain
feature cannot be disabled. This feature is similar to the Auto Drain for the
Automatic Drain Sequence but it does not wait for Usage or allowed time and
day requirements.
DUCT HIGH LIMIT SWITCH OPTION
When a duct high limit option is ordered, DriSteem provides either a duct
high limit switch or a duct high limit humidity transmitter (4 to 20 mA output,
0 to 100% RH range) for duct mounting.
The duct high limit switch prevents duct saturation by turning off the humidifier
when reaching the device set point. When this occurs, a “Duct HL trip”
message appears in the Alert Log of the touchscreen and a message appears
in the Messages Log and autoclears when duct RH drops below the duct high
limit set point.
MODULATING HIGH LIMIT TRANSMITTER OPTION
The modulating high limit transmitter operates in conjunction with the room/
duct controlling transmitter or demand signal through the Vapor-logic control
system to prevent excess humidification in the duct. Vapor-logic starts lowering
the humidifier output when the duct relative humidity is within a user-defined
percentage (default is 5%) of the duct high limit set point. This value is called
the duct high limit span and is defined during Setup.
When duct relative humidity enters this range, a “Duct HL span” alert appears
in the Alert Log of the touchscreen and a message appears in the Message
Log of the Web interface. If necessary, the reduction of the humidifier output
continues until maximum high limit set point is reached, shutting off the
humidifier completely. If this occurs, a “Duct HL trip” alert appears in the Alert
Log of the touchscreen and a message appears in the Message Log of the Web
interface.
When the high relative humidity starts to decrease in the duct, Vapor-logic
slowly starts to increase steam production. When the duct relative humidity
decreases to greater than the defined percentage below the duct high limit
set point, the control transmitter or signal by others demand signal is restored
as the primary controller, returning the control system to normal operation,
and the messages in the Message Log of the Web interface and active alerts
automatically clear.
Options and features
OPERATION
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