Electronic Expansion Valve (EEV) After 1/20 On Remote Cases Only
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 449A 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 in the base of the case to the left of the electrical connection box.
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.
Market Deli Refrigerated Cases
Page 20
