Manual
EKC 315A Industrial Evaporator Controller
6
USCO.PD.RD0.A1.22 / 521U0092
© Danfoss USCO (HMR_MKS), 04-2008
Quick Setup Guide
NOTE: For most applications, only the below parameters need to be reviewed and possibly changed. For each parameter, record your setting and
other pertinent settings if any, in the “Field Settings” column provided in each parameter table on the following pages. After going through the quick
start procedure below, it is best to review the complete parameter list to ensure all needed changes have been done for your application.
Essential settings that must be made before others will take effect:
1) If the controller is already wired it may be best to put the controller into standby by setting parameter r12 to OFF. This way the controller
will not try to regulate while setting up the parameters. If this is done, parameter r12 must be changed back to ON for the controller to
regulate.
2) The desired units must be set prior to programming any settings. For the units to be entered and displayed in °F and psig, parameter r05
must be changed to F-P (the default units are °C and bar pressure).
3) Change parameter o12 to 60 Hz unless the supply is 50 Hz.
Setting up the controller for superheat regulation
1) Select the valve that is being used, parameter o09. Typical settings are par. o09=4 when using the pulse-width expansion valve type
AKVA or par. o09=7 when using the ICM motor valve with ICAD motor actuator’s default settings input setting.
2) Enter the pressure transmitters working range in parameters o20 (min value) and o21 (max. value). Note: These settings must be entered
in gauge pressure and most transmitter ranges are listed in absolute pressure which will need converted to gauge pressure before
entered.
3) Select the refrigerant that is being used, parameter o30. For R717 (ammonia) that setting would be par. o30=5.
4) Set the superheat regulation method, parameter n21. For industrial refrigeration systems, it is best to try load-defined superheat
regulation which would be par. n21=2.
5) The controller will regulate superheat based on a user-defined superheat range in parameters n09 and n10. It is best to leave these at the
default settings and later fine tune them if needed.
Note: parameter n10 must be set higher than parameter n22.
6) For most applications the shaded parameters in the parameter list should not be changed.
7) Verify that parameter r12 is ON.
Setting up the thermostat function for controlling a liquid line solenoid valve
The additional temperature sensor S3 must be installed for use of the thermostat function. The controller will then control the solenoid relay
and alarm relay based on the sensor S3 reading and the user defined setpoints.
1) Set the thermostat set point. This setting is not changed by entering the parameter list, but by pushing both buttons simultaneously.
2) Set the differential for the thermostat function, parameter r01.
3) Turn on the thermostat function with parameter r14 (r14=1 for ON).
4) If desired, set up the alarm parameters A1, A2 and A3.
5) Verify that parameter r12 is ON.
