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VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
AQUASTAT SET POINT FEATURE
The aquastat set point is the minimum tank temperature the Vapor-logic
controller maintains when there is no call for humidity or when safety circuits
are not satisfied (e .g ., high limit or airflow proving switch) . The aquastat set
point is adjusted through the water management section of the Settings menu .
This feature shortens the tank preheat time, providing a rapid response to a
call for humidity .
For example, if the aquastat is set at 180 °F (82 °C) when a call for humidity
occurs, the tank only needs to warm up 32 °F (18 °C) to reach the boiling
point . However, if the aquastat is at its minimum default setting of 40 °F (4 °C)
and the tank is in an average-temperature occupied room, when a call for
humidity occurs, the tank needs to warm up from room temperature to the
boiling point before producing steam . When an aquastat call is heating the
tank, the word “Heating” appears on the Home screen . Aquastat heating will
occur with high-limit and airflow alarm conditions .
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 of the Web
interface and an alert appears in the Alert Log of the touchscreen .
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-logic 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 Settings menu) .
Note: The Fan Dispersion option appears in the Settings menu of the
touchscreen only if the humidifier was originally ordered with fan or SDU
dispersion . To change to duct dispersion, consult with DriSteem technical
support and use the Web interface to choose Fan Dispersion .
Options and features
OPERATION
