24431
Rev. A
10/12
http: www.networketi.com
Environmental Technology, Inc.
53 of 94
Automatic Air Dehydrator
ADH
®
SIROCCO™
Instruction Manual
CHANGING THE OPERATIONAL PRESSURE SETTINGS
The two most important factors in determining the system pressure parameters
are to keep a constant supply of dry, pressurized air circulating through the
system and to avoid any damage to the system feed horn window and other
sensitive system components. Before describing how to change the operational
pressure settings, it is important to first understand how these settings are
determined and how they work together.
Four numeric settings comprise the pressure parameters of the ADH Sirocco
automatic air dehydrator. In ascending order (which is how they appear on the
Operational Settings screens), these four settings are:
Low Pressure Alarm
Low Pressure Limit
High Pressure Limit
High Pressure Alarm
The Low Pressure Alarm setting must be at least 0.01 PSI lower than the Low
Pressure Limit, just as, at the high end, the High Pressure Alarm setting must be
at least 0.01 PSI higher than the High Pressure Limit. Additionally, there are
other requirements for each of the settings that an operator must know.
The Low Pressure Alarm must be set to at least 0.1 PSI or 7 mbar.
The Low Pressure Limit must be set to at least 0.2 PSI or 14 mbar.
The High Pressure Limit can be no greater than 7.50 PSI or 517 mbar.
The High Pressure Alarm can be no greater than 9.00 PSI or 620 mbar.
As it is explained later in this section, not only can none of these settings overlap,
but the dehydrator is programmed such that any overlapping or out of range
setting will not even be accepted by the unit.
If, for instance, you want to lower the Low Pressure Limit setting from the default
setting of 0.30 PSI to 0.12 PSI, you must first make sure that the Low Pressure
Alarm setting is no greater than 0.11 PSI. The same, though in reverse, is true at
the high end. To increase the High Pressure Limit from the default setting of
0.50 PSI to 3.0 PSI, for example, it will first be necessary to make sure that the
High Pressure Alarm setting is at least 3.01 PSI. The software inside the
dehydrator will help you make these settings by not accepting or allowing any
setting that is out of the acceptable range.