2
3
Hysteresis
This feature is a pressure value added to the switchover pressure value to determine the pressure at which the
IntelliSwitch will switch back to a cylinder after the “Look Back” time has expired. This features provides
added protection against inadvertently drawing from the reserve bank when the primary still has gas.
Economizer Function
When using liquid cylinders in switchover application, it is common for the reserve cylinder to build pressure
due to the vaporization of liquid within the cylinder. When this pressure reaches the set point of the relief
valve on the liquid cylinder, the relief valve will open, venting gas to the atmosphere. The IntelliSwitch
constantly monitors the reserve cylinder and, at a predetermined pressure, will change the valving to allow gas
from the headspace of the reserve cylinder to feed the system, thus drawing down the pressure in the reserve
cylinder. There are three pressure ratings for liquid cylinder relief valves, 230 PSIG, 350 PSIG and 500 PSIG;
the IntelliSwitch has predetermined settings for all three types that may be selected on the front panel of the
system.
Settable Switchover Pressure
The IntelliSwitch can be configured to switch at pressures ranging from 100 to 500 PSI. This value is factory
set but can be changed in the field. To change this value refer to the section on changing the switchover
pressure.
Manual Bank Switching
It is possible to manually change the side that gas is being drawn from by pressing the “BANK SELECT”
button provided that there is sufficient pressure on the side being switched to.
Selectable Units of Measure
The default units of measure for the IntelliSwitch are PSI. Alternate units of BAR or MPA can be selected by
changing internal DIP switch settings. To change units of measure refer to the section on changing units of
measure.
Security Lockout
The IntelliSwitch has the ability to electronically lockout the front panel buttons to discourage tampering.
The factory default setting is OFF or disabled. Refer to section on Keypad Security Lockout for details.
Alarm Notification
The IntelliSwitch is designed to interface with CONCOA Remote Alarms and comes with the necessary
mating connector for their use. Refer to the section on connecting a remote alarm for more information.
Serial Port
The IntelliSwitch is capable of communicating to peripheral equipment via a standard serial port. For more
information on the serial port refer to the section on connecting to a serial port.
Burst Disk Overpressure Protection
The IntelliSwitch is equipped with a replaceable burst disk for each bank to protect the system from extreme
pressure increases and liquid withdrawal.
Summary of Contents for INTELLISWITCH
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