Orion System Dual Electronic Expansion Valve Module - Manual (Page 4)

Dual Electronic Expansion Valve Module
Technical Guide 4
Features and Applications
Features
The Dual Electronic Expansion Valve Module provides the following:
• Contains a 2x8 LCD character display and 4 buttons
that allow for status display, setpoint changes, and
confi guration changes.
• Can control two electronic expansion valves independently.
• Monitors suction pressure and coil temperature and
modulates electronic expansion valves to maintain
superheat.
• Provides active relays to monitor valve alarms.
NOTE: The
Dual Electronic Expansion Valve Module contains
no user-serviceable parts. Contact qualifi ed technical per-
sonnel if your
Dual Electronic Expansion Valve Module
is not operating correctly.
Adjustable Setpoints
The following describes some of the setpoints available for adjustment
using the LCD display on the Dual Electronic Expansion Valve Module:
• Superheat Setpoint - One setpoint is used for
both valves.
• Modulation Rate - This setpoint (in seconds) will
adjust how often the modulation routine will make a
valve adjustment.
• Proportional Window - This setpoint (in degrees)
will adjust how much of an adjustment will be made
according to how far away it is from setpoint.
Confi guration Settings
• Board Address – Can be addressed from 1 to 4.
Used as stand-alone, the default address is 1.
• Valve B Enable – When using the module for only
one valve, valve B can be disabled so false information
is not displayed such as alarms and sensor readings.
• Valve Steps – Confi gurable for what valve is being
used (1596, 2500, 3193, 6386)
• Max Valve Position – The maximum position each
valve will modulate (%).
• Min Valve Position – The minimum position each
valve will modulate (%).
•
Suction Pressure A Calibration Offset –
Adjustable between -10 and 10 PSI.
• Suction Pressure B Calibration Offset –
Adjustable between -10 and 10 PSI.