4
DKRCC.PS.R1.A3.02 / 520H9752
© Danfoss A/S (DCS-IMCGPD/sw), 2015-03
Manual
Electronic superheat controller, type EKC 312
Data
Necessary connections
Terminals:
25-26 Supply voltage 24 V AC.
21-24 Supply to step motor
18-19 Pt1000 sensor at evaporator outlet (S2)
14-15 Pressure transmitter type AKS 33
1-2
Switch function for start/stop of regulation. If a switch is
not connected, terminals 1 and 2 must be shortcircuited.
Application dependent connections
Terminal:
18-20 Pt1000 sensor for measuring air temperature (S4)
12-13 Alarm relay
There is connection between 12 and 13 in alarm situa tions
and when the controller is dead
3-4
Data communication
Mount only, if a data communication module has been
mounted.
It is important that the installation of the data communi-
cation cable be done correctly. Cf. separate literature No.
RC8AC...
Connections
Supply voltage
24 V AC +/-15% 50/60 Hz, 10 V A
(the supply voltage is galvanically sepa-
rated from the input and output signals)
Power consumption
Controller
ETS step motor
5 V A
1,3 V A
Input signal
Press. transmitter 4-20 mA from AKS 33
Digital input from external contact func-
tion
Sensor input
2 pcs. Pt1000 ohm
Alarm relay
1 pcs. SPST
AC-1: 4 A (ohmic)
AC-15: 3 A (inductive)
Step motor output
Pulsating 100 mA
Data communication
Possible to connect a data
communication module
Ambient
temperature
-10 – 55 °C, During operation
-40 – 70 °C, During transport
20 – 80% Rh, not condensed
No shock influence/vibrations
Enclosure
IP 20
Weight
300 g
Mounting
DIN rail
Display
LED, 3 digits
Approvals
EU Low Voltage Directive and EMC
demands re CE-marking complied with.
LVD-tested acc. to EN 60730-1
and EN 60730-2-9
EMC-tested acc. to EN50081-1
and EN 50082-2
Data communication
< --------------- max. 5 m --------------->
Ordering
Type
Function
Code No.
EKC 312
Superheat controller
084B7250
EKA 173
Data communication module (accessories),
(FTT 10 module)
084B7092
EKA 175
Data communication module (accessories),
(RS 485 module)
084B8679
EKA 174
Data communication module (accessories),
(RS 485 module) with galvanic separation
084B7124
Temperature sensor Pt 1000 ohm / Pressure transmitter type AKS 33: Kindly refer to catalogue
RK0YG ETS valves: Kindly refer to data sheet RD1TA