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Necessary connections
11 - 12 Pt 1000 ohm sensor. Refrigeration outlet (S2)
13 - 14 Air temperature sensor before evaporator (S3)
15 - 16 Air temperature sensor after evaporator (S4)
It is application determined whether S3 or S4 or both
has to be mounted.
S3, S4 and S5 may either be Pt 1000 ohm or Ptc
1000 ohm, but they must all be of the same type.
20 - 22 Signal from pressure transmitter type AKS 32R
23 - 24 Supply voltage 230 V 50/60 Hz
25, 26 Protective earth connection
27 - 28 Expansion valve type AKV (230 V d.c.)
40 - 41 230 V signal for start/stop of regulation
(the connection can be left out with setting in o29).
Application dependent connections
1 - 2
Output signal on terminal 2, if there is coordinated
defrost with cable connections
3 - 4
Input signal from a contact function or signal on
terminal 4, if there is coordinated defrost with cable
connections
5 - 7
Possibility of connecting an external display type EKA
161
8 - 10
Possibility of connecting an external display with
operating knobs type EKA 162
17 -18 Defrost sensor on the evaporator (S5). (The sensor
can either be Pt 1000 ohm or Ptc 1000 ohm)
29 - 31 Alarm relay
There is connection between 29 and 31 in alarm
situations and when the controller is de-energised
32 - 33 Compressor relay
34 - 35 Defrost relay
36 - 37 Fan relay
38 - 39 Light relay
There is connection between 38 and 39
when control performed during day operation
43 - 44 Data communication
It is important that the installation of the data commu-
nication cable be done correctly. Cf. separate
literature No. RC.8A.C...
Gateway AKA 243B must be version 5.3x or newer
version.
The wire switch to the left of terminal 43 will termi-
nate with 120 ohm in closed position.
EKC 414A
Manual RS.8C.K3.02 © Danfoss 09-2003
Installation considerations
Accidental damage, poor installation, or site conditions, can
give rise to malfunctions of the control system, and ultimately
lead to a plant breakdown.
Every possible safeguard is incorporated into our products to
prevent this. However, a wrong installation, for example,
could still present problems. Electronic controls are no
substitute for normal, good engineering practice.
Danfoss wil not be responsible for any goods, or plant
components, damaged as a result of the above defects. It is
the installer's responsibility to check the installation thor-
oughly, and to fit the necessary safety devices.
Special reference is made to the necessity of signals to the
controller when the compressor is stopped and to the need
of liquid receivers before the compressors.
Your local Danfoss agent will be pleased to assist with further
advice, etc.
Plug
The controller comes factory-mounted with one part of a
plug connection. The other part is of the type Phoenix
and AMP with the following type designations:
ConnectionType
1-2:
MC1,5/2-ST-3,81
3-4:
""
Display:
AMP ital mod 2, housing 280 359,
crimp contact 280 708-2
Display:
""
S2:
AMP ital mod 2, housing 280 358,
crimp contact 280 708-2
S3:
""
S4:
""
S5:
""
20-22:
MC1,5/3-ST-3,81
23-25:
MSTBT2,5/3-ST-5,08
26-28:
""
29-31:
""
32-33:
MSTBT2,5/2-ST-5,08
34-35:
""
36-37:
""
38-39:
""
40-41:
MC1,5/2-ST1-5,08
43-44:
MC1,5/2-ST-3,81
The screw terminals (Phoenix plug) are not bypacked for some of
the code numbers.
Sensors and display supplied with plug.
13
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