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Contents
Installation ................................................................................3
controllers ........................................................................................ 3
Stepper motor Output ................................................................ 3
Output relay contacts .................................................................. 3
Settings and checks to be made before start. ........................4
Basic Settings .................................................................................. 4
Finding the optimum settings. ................................................6
Details on the controller algorithm and settings .............. 6
The regulation modes for controlling superheat .............. 6
Problems of start up ..................................................................... 7
Types of regulation. ..................................................................8
Manually operating the valve. .............................................. 11
Operating the valve manually from the EKC316A ..............
controller ........................................................................................11
signal ...............................................................................................11
Operating the valve manually by an extern analogue ......
signal with MOP active ..............................................................11
Battery back-up. .................................................................... 13
Troubleshooting. ................................................................... 13
Alarms .................................................................................... 14
References .............................................................................. 15
Installation
The EKC 316A is normally mounted on a DIN rail, and the neces-
sary connections are shown in the diagram. If the sensor S3 is not
used to measure air temperature in connection with thermostat
function or as part of the controlling loop, then it is not necessary
to connect the S3 sensor. The 18Volt battery input at terminals 5
and 6 is not required if battery back-up is not needed.
Communication to controller is an option and can only be
achieved by inserting the data communication module EKA 174 or
EKA 175 in the EKC 316A controller.
2
Reference manual RS8ED102 © Danfoss 03-2006
Data communication
< --------------- max. 5 m --------------->
EKA 174/175
EKC 316A
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