Refrigerated Self-Serve Merchandiser (High Profile)
Page 20
Remote Operation
Electronic Expansion Valve (EEV) After 1/20
A traditional TXV uses springs and a temperature bulb to open and close a valve port that controls the flow of
refrigerant entering the evaporator coil. An electronic expansion valve (EEV) controls the refrigerant flow much
more precisely, increasing the performance and efficiency of the refrigeration system. The EEV controls the
flow of Refrigerant by opening and closing the valve port based on the response to signals sent to the EEV by
an electronic controller. The electronic Control bases these signals by processing information provided from a
temperature sensor and pressure transducer located on the discharge side of the evaporator coil.
These sensors monitor the evaporator superheat and protects the compressor from any liquid flood back under
low superheat conditions.
EEV Controller Settings
The
electronic expansion valve controller also allows the use of different types of refrigerants without the need
to change the expansion valve.
The controller is set from the factory to run on R449a refrigerant and will not need any changes to the control
unless another refrigerant is used.
Note: Check your State and Local regulations for approved refrigerants for your install location. Federal
Industries is not liable for any alternate refrigerants used.
The control is located on the base floor on the left-hand side front view .
Note: Never change any of the other setting other than the refrigerant type. It may also be necessary to
change the superheat setting only when using a different refrigerant
.
Changing Refrigerant
•
Access the set point mode by pressing and holding the
button until Ctl displays on the screen.
•
Use the
up or down arrows
to advance through the available set points until rFG displays on the
screen and press the
botton.
•
Use the
up or down arrows until the desired refrigeration displays on the screen and press and hold
the
button until rFG once again displays on the screen.
•
Press the
to return to escape the settings menue.
Changing Superheat
•
Access the set point mode by pressing and holding the
button until Ctl displays on the screen.
•
Use the
up or down arrows
to advance through the available set points until SSP displays on the
screen and press the
botton.
•
Use the
up or down arrows to set the desired superheat displays on the screen and press and hold
the
button until SSP once again displays on the screen.
•
Press the
to return to escape the settings menue.
