Survey of functions
Function
Para-
meter
Parameter by operation via
data communication
Normal display
The superheat is normally shown.
The opening degree is displayed during manual operation or if the valve is under
analogue control.
SH/OD%
Reference
Miscellaneous
Unit
Here you select whether the controller is to indicate the temperature values in °C or in
°F and pressure values in bar or psig.
If indication in °F is selected, other temperature settings will also switch to Fahrenheit,
either as absolute values or as delta.
The combination of temperature unit and pressure unit is depicted to the right.
r05
Units (Menu = Misc.)
0: °C + bar
1: °F + psig
Correction of signal from S2
(Compensation possibility through long sensor cable).
r09
Adjust S2
Correction of signal from S4
(Compensation possibility through long sensor cable).
r10
Adjust S4
Start/stop of refrigeration
With this setting, refrigeration can be started and stopped. Start/stop of refrigeration
can also be accomplished with the external switch function. See also appendix 1.
r12
Main Switch
Alarm
Alarm setting
If there is an alarm, the LEDs on the front of the external display will flash if it is con-
nected. The alarm relay in the controller is closed.
Battery alarm
Here it is defined whether the controller is to monitor the voltage from the battery
backup. If there is low voltage, or no voltage, an alarm will be given
A34
Batt. alarm
Control parameters
Injection control
Valve definition
0 = ETS 12½, ETS 25, KVS 15
1 = ETS 50, CCM 10, CCM 20, CCM 30
2 = ETS 100, CCM 40
3 = ETS 250, KVS 42
4 = ETS 400
5 = user-defined
6 = Saginomiya UKV/SKV/VKV/PKV;
7 = ETS 6
8 = CCMT 2, CCMT 4, CCMT 8
n03
Valve type
On using external display EKA 164A, please check page 9 section ETS valve
P: Amplification factor Kp
If the Kp value is reduced the regulation becomes slower.
n04
Kp factor
I: Integration time Tn
If the Tn value is increased the regulation becomes slower.
n05
Tn sec.
D: Differentiation time Td
The D-setting can be cancelled by setting the value to min. (0).
n06
Td sec.
Max. value for the superheat reference
n09
Max SH
Min. value for the superheat reference
Warning
:
Due to the risk of liquid flow, the setting should not be lower than approx. 2-4 K.
n10
Min SH
MOP
Note:
If no MOP function is required, select pos. Off. (A value of 200 corresponds to Off)
n11
MOP (bar)
Startup time for safety signal
If the controller does not obtain a reliable signal within this period of time the con-
troller will try to establish a stable signal in other ways. (A value that is too high may
result in a flooded evaporator).
The value should only be changed by specially-trained staff .
n15
StartUp time
Signal safety during startup
The control function uses the value as a start value for the valve’s opening degree at
each thermostat cut-in. By adaptive control the controller continuously calculates a
new value.
The value should only be changed by specially-trained staff.
n17
Start OD%
Stability factor for regulation of superheat
With a higher value, the control function will allow a greater fluctuation of the super-
heat before the reference is changed. The value should only be changed by specially-
trained staff.
n18
Stability
Survey and function (continued)
Damping of amplification near reference value
This setting damps the normal amplification Kp, but only just around the reference
value. A setting of 0.5 will reduce the KP value by half.
The value should only be changed by specially-trained staff.
n19
Kp Min
Amplification factor for the superheat
This setting determines the valve’s opening degree as a function of the change in
evaporating pressure. An increase of the evaporating pressure will result in a reduced
opening degree. When there is a drop-out on the low-pressure thermostat during
startup, the value must be raised slightly. If there is pendling during start-up, the
value must be reduced slightly.
The value should only be changed by specially-trained staff.
n20
Kp T0
Definition of superheat regulation (Ref. section "Operation")
1: Lowest permissible superheat (MSS). Adaptive regulation.
2: Load-defined superheat. The reference is established based on the line formed by
the three points: n09, n10 and n22.
n21
SH mode
Value of min. superheat reference for loads under 10%
(The value must be smaller than "n10").
n22
SH Close
Max. opening degree
The valve’s opening degree can be limited. The value is set in %.
n32
ETS OD% Max
Number of steps from 0% to 100% open (User-defined valve, n03 =5)
(Automatic setting when valve is selected in n03).
n37
Max. steps (100 to 6000 step)
Spindle stroke speed (number of steps per second)
(Automatic setting when valve is selected in n03).
n38
Steps/sec (5 to 300 step/sec)
Integration time for the inner loop gain
Used only when o56 = 2
The value should only be changed by specially-trained staff.
n44
TnT0 sec
Miscellaneous
Miscellaneous
Address/data communication
The controller must always have an address. The factory-set address is 240.
When an external display is connected, the display itself will find the address of the
controller so that communication can take place.
Note:
A display and a system unit must not be connected at the same time.
The display will not be able to communicate in this situation.
If the controller is to be part of a network with other controllers and a system unit, the
controller‘s address must be within the range 1 to 200.
This address must EITHER be set via a display before it is connected to the data com-
munication and a scan of the network is performed
OR the network is connected and a scan is performed. The address is then set after-
wards. A new scan is performed so that the new address is known.
Requirements for the installation and data communication cable are discussed in the
separate document no. "RC8AC".
The controller can be operated via the
system unit and AK service tool.
It cannot be operated via AKM type
system software.
o03
Unit addr.
The address is set between 0 and 200.
(When the address is set, the system
the system unit’s scan function should
be activated)
Application mode
1: The controller receives signals from another controller and must control the valve’s
opening degree.
2: Superheat regulation.
o61
Appl. mode
Input signal for external control of the valve
‘
s opening degree
Only used if o61 is set to 1.
Definition of the signal's range.
0: No signal
1: 0-20 mA
2: 4-20 mA
3: 0-10 V
4: 1-5 V
(At the lower value the valve will be closed. At the upper value the value will be fully
open. There is a linear relationship between the signal and the opening degree. The
height of the valve is not taken into account.)
o10
AI type
©Danfoss A/S (AC-MCI / sw), 2014-03
DKRCC.PS.RP0.A1.02/520H7142
19
18
DKRCC.PS.RP0.A1.02/520H7142
©Danfoss A/S (AC-MCI / sw), 2014-03
Manual Superheat controller type EKD 316
Manual Superheat controller type EKD 316