Danfoss EKC 366 User guide

User Guide

Interface

EKC 366

The controller is used for regulating a valve in
a refrigerating system - for example in
connection with:

• Long-term storage of fruits and vegetables

• Refrigerating plant

• Brewery systems

• Processing plant

Application Here the controller has been specially

designed for the following functions:

Maintenance of a constant
evaporating pressure

A temperature sensor in the valve’s actuator will
regulate its temperature. This temperature is
an indication of the pressure in the valve, and
the interface module will keep this temperature
constant.

The media temperature is regulated
by a PLC or similar device

Here the interface module receives a variable
signal from the PLC and will subsequently
regulate the valve, so that the refrigeration will
be as accurate as possible.

PLC

© Danfoss | DCS (ADAP-KOOL®) |2015-11

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User Guide | Interface, EKC 366

System

The controller must always be used in conjunction with a pilot
valve of the types shown here.
The most commonly used one is pilot valve CVQ in conjunction
with main valve PM3 (sketched out above).

Valve types:

- CVQ + PM

- KVQ

- TQ

- PHTQ

- TEAQ

- CVMQ

Function

The valve constantly receives feedback of the pressure in the
evaporator. Whatever the variations in the suction pressure from
the compressor, this feedback will produce the result that the
evaporating pressure is kept constant.

In conjunction with the controller, an electronic constant-pressure
valve is thus obtained.

Inserted between the controller and the actuator is a so-called
inner regulating loop. This loop will - via an NTC resistance - con­stantly control the temperature in the actuator.

In an application where a PLC or similar device is used for regulat­ing a media temperature, the regulating system will in this way be
supplied with an outer regulating loop - which will result in great
regulating accuracy.

"Q valve"

PLC

© Danfoss | DCS (ADAP-KOOL®) | 2015-11

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User Guide | Interface, EKC 366

Survey of functions

Function Para-

meter

Temperature regulation Actuator temperature

Display of valve temperature

The display constantly shows the valve's temperature.
The display is ltered over a period of approx. 10 seconds

Valve’s basic temperature reference

This temperature setting is the valve’s basic setting. At this value no signal must be
received from an external regulation.
The setting value is taken from one of the curves shown and may be ne-adjusted lat­er when the valve has reached the temperature (read the manometer in the system).
(Push both buttons simultaneously to set the menu)

Temperature unit
Set here whether the controller is to show the temperature values in °C or in °F. If in­dication in °F is selected, other temperature settings will also change over to Fahren­heit, either as absolute values or as delta values.

Input signal’s temperature inuence

This setting determines how much the input signal has to raise the temperature in
the valve. You should aim at selecting the value, so that the valve can close at the
highest occurring evaporating pressure when the input signal is maximum (value to
be set in Kelvin)

Reference
The valve’s temperature is regulated on the basis of the basic setting plus the signal
from the external regulation. (Reference = SP Temp + percentage of "r06".)
The reference can be seen when you push the lower of the two buttons

Sundry congurations Miscellaneous

Parameter by operation via data
communication

- Actuator temp.

- SP Temp.

r05 Temp. unit (°C=0, °F=1)

(In AKM only °C is displayed, whatever
the setting).

r06 Ext.Ref.oset K

- Actuator Ref.

External signal

Here you set the signal that is to be connected to the controller.
0: no signal
1: 4-20 mA
2: 0-20 mA
3: 0-10 V
4: 2-10 V

Frequency

Set network frequency

Data communication

If the controller is built into a network with data communication, it must have an
address, and the master gateway of the data communication must then know this
address.
These settings can only be made when a data communication module has been
mounted in the controller and the installation of the data communication cable has
been completed.
This installation is mentioned in a separate document “RC.8A.C”.

The address is set between 1 and 60 o03

The address is sent to the gateway when the menu is set in pos. ON o04

Language

This setting is only required when data communication is connected to the controller.
Settings: 0=English, 1=German, 2=French, 3=Danish, 4=Spanish, and 6= Swedish
When the controller is operated via data communication, the texts in the right-hand
column will be shown in the selected language.
When you change the setting to an other language you must activate o04 before "the
new language" can be visible from the AKM program.

Service

o10 AI Type

o12 50 / 60 Hz

o11 Language

(50=0, 60=1)

Following installation of a data com­munication module, the controller can
be operated on a par with the other
controllers in ADAP-KOOL® refrigera­tion controls.

The signal will be constantly updated. If you wish to follow the signal beyond the
20 seconds, the time-out period, push one of the two buttons before the time-out
period expires

External current signal

Here you can read the value of the current signal received by the controller at its input

External voltage signal

Here you can read the value of the voltage signal received by the controller at its
input

© Danfoss | DCS (ADAP-KOOL®) | 2015-11

u06 AI mA

u07 AI Volt

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