Specifications

124 RK0YG302 © Danfoss 05/2007
Menu survey
SW =1.2x
EKC 312
Function
Para-
meter
Min. Max.
Fac.
Set-
tings
Normal display
Shows the actual superheat/ valve's opening
degree/ temperature
Dene view in o17
-K
If you wish to see the expansion valve’s actual
opening degree, give the lower button a brief
push (1s). Dene view in o17
-%
Reference
Units (0=°C+bar /1=°F+psig)
r05 0 1 0
Start/stop of refrigeration r12 OFF On 1
Regulating parameters
P: Amplication factor Kp n04 0.5 20 3
I: Integration time T n05 30 s 600 s 120
Max. value of superheat reference n09 2 K 30 K 10
Min. value of superheat reference n10 1 K 12 K 4
MOP n11 0.0 bar 20 bar 20
Amplication factor for superheat
Changes should only be made by trained sta
n20 0.0 10.0 0,4
Value of min. superheat reference for loads
under 10%
n22 1 K 15 K 2
”n37” and ”n38” are adapted to valve type ETS 50
and should only be changed through the use of
another valve.
Number of steps from 0-100% opening degree
(x10)
(ETS 50= 263. ETS 100 = 353)
n37
000
stp*
5000
stp *
263
Number of steps per second n38
10
stp/s
300
stp/s
250
Integration time for inner loop (TnT0) n44 10 s 120 s 30
Miscellaneous
Controller’s address o03* 1 60
ON/OFF switch (service-pin message) o04* - -
Set supply voltage frequency o12 50 Hz 60 Hz 50
Select display for ”normal picture”
1: Superheat
2: Valve’s opening degree
3: Air temperature
o17
131
Manual control of outputs:
OFF: no manual control
3: Alarm relay activated (cut out)
At settings 3, ”o45” will be active
o18
o 3 0
Working range for pressure transmitter – min.
value
o20 -1 bar 60 bar -1.0
Working range for pressure transmitter – max.
value
o21 -1 bar
60 bar 12
Refrigerant setting
1=R12. 2=R22. 3=R134a. 4=R502. 5=R717.
6=R13. 7=R13b1. 8=R23. 9=R500. 10=R503.
11=R114. 12=R142b. 13=User dened.
14=R32. 15=R227. 16=R401A. 17=R507.
18=R402A. 19=R404A. 20=R407C. 21=R407A.
22=R407B. 23=R410A. 24=R170. 25=R290.
26=R600. 27=R600a. 28=R744. 29=R1270.
o30 0 29 0
Manual control of the valve’s opening degree.
The function can only be operated if ”o18” has
been set.
o45 0 % 100 % 0
Selection of loop ctrl:
1=Normal
2 = double loop
o56 1 2 1
Service
Read status of input DI u10 on/o
Temperature at S2 sensor u20 °C
Superheat u21 K
Superheat reference u22 K
Read AKV valve’s opening degree u24 %
Read evaporating pressure u25 bar
Read evaporating temperature u26 °C
Temperature at S4 sensor u27 °C
Read signal at pressure transmitter input u29 mA
*) This setting will only be possible if a data communication module has
been installed in the controller.