24431
Rev. A
10/12
http: www.networketi.com
Environmental Technology, Inc.
6 of 94
Automatic Air Dehydrator
ADH
®
SIROCCO™
Instruction Manual
GLOSSARY
Listed below are some important terms and their definitions.
Duty Cycle
The amount of time, expressed as a percentage, that the compressor is
actively pumping dry, pressurized air.
High Duty Cycle Alarm Level
The configurable set point at which the ADH Sirocco will indicate a high duty
cycle. The factory default setting is 50%. The system duty cycle and the
discharge pressure are available for display. Typically, the system should be
tight enough to limit the duty cycle to less than 20%. System component life
decreases as duty cycle increases. A Duty Cycle Alarm occurs if the duty
cycle exceeds the configured Duty Cycle Alarm level.
High Limit Target Pressure
The high set point of the operating pressure range for the dehydrator. This is
the pressure setting which the unit will target during compressor operation.
The actual turn-off pressure is adjusted in the software every pressurization
cycle after determining the rate of pressure change during that cycle. This
software compensation for the rate of pressure change during pressurization
minimizes compressor “undershoot.” The High Limit Target Pressure must be
between 0.20 psig and 7.5 psig (14mbar to 517mbar). The factory default
setting for High Limit Target Pressure is 0.5 psig (34.5mbar).
High Pressure Alarm Level
The user-configurable high pressure limit at which an alarm condition will be
indicated. Note that the High Pressure Alarm Level must be set higher than
the High Limit Target Pressure setting. The factory default setting is 1.5 psig
(103.5mbar). A High Pressure Alarm occurs if the pressure exceeds the
configured High Pressure Alarm Level for more than 30 seconds. Mechanical
Overpressure protection is recommended within the system to prevent
pressure reaching the High Pressure Alarm level.
