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Instructions
EKC 531D1
Identifi cation
Dimensions
084B8007
Principle
RI8HU352 12-2004
ENGLISH
Connections
Brine cooling
All inputs are low-voltage.
All relay outputs may be
high-voltage.
Data communication
Necessary connections
Terminals:
1-2
Application dependent connections
20-21
AKD start/stop *
The relay cutin when the frequency converter have to
start.
Supply voltage 24 V a.c.
4- 19
Relay outputs for either compressors, unloaders or
fan motors
37-38
Voltage signal to external condenser control
22-24
Alarm relay *
There is connection between 22 and 24 in alarm situations
and when the controller is dead
39-41
Possibility of connecting an external display type
EKA 161 for display of Pc
42-44
Possibility of connecting an external display type
EKA 161 for display of P0, or EKA 162 for operation and
27-28
24 V signal to start / stop of regulation
display of P0
27-29
24 V signal from the safety circuit DO 1
45-46
Contact function for alarm signal
27-30
24 V signal from the safety circuit DO 2
45-47
Contact function for alarm signal
27-31
24 V signal from the safety circuit DO 3
48-49
Contact function for alarm signal
27-32
24 V signal from the safety circuit DO 4
48-50
Contact function for displacement of the suction
27-33
24 V signal from the safety circuit DO 5
pressure reference or for alarm signal.
27-34
24 V signal from the safety circuit DO 6
51-52
Contact function for displacement of the condenser
27-35
24 V signal from the safety circuit DO 7
pressure reference or for alarm signal.
27-36
24 V signal from the safety circuit DO 8
51-53
Separate sensor Saux1. Sensor signal fra AKS 11,
57-59
Suction pressure. Voltage signal from AKS 32R **
AKS 12 or EKS 111
60-62
Condenser pressure. Voltage signal from AKS 32R **
54-56
Air temperature at condenser outlet. Sensor signal
54-55
Out temperature (Sc3). Sensor signal from AKS 11,
from AKS 11, AKS 12 or EKS 111
AKS 12 or EKS 111
Data communication
25-26
Unloader
Mount only, if a data communication module has
been mounted.
For ethernet communication the plug connection RJ45
must be used. (LON FTT10 can also be connected in this
way.
It is
important
that the installation of the data commu-
nication cable be done correctly. Cf. separate literature
No. RC8AC..
The termination bracket is placed to the right of
terminal 26.
If an output is used for an unloader it is
not neccessary to wire the belonging
safety circuit.
*) Relays DO9 and DO10 may in special cases be reconfi gurated so that they can be
used as fan relays.
**)
•
If the controller has to control only the comrpessor or the fans, respectively Pc and
Pc sensor can be dispensed
•
In brine systems temperature measurement at terminals 57-58 and 60-61 may be
used instead of pressure measurement with AKS 32R. See also o06.
2
Instructions RI8HU352 © Danfoss 12/2004
EKC 531D1
Compressor confi guration
Setting "C16" will defi ne the confi guration.
Setting "C08" will defi ne coupling mode.
Capacity step
All
capacity steps are presumed to
be identical. The only exception is
the settings C16 = 0, 4, and 21 to 26.
Couplings
When there is cyclic operation and
connections with unloaders there
will in some capacity cutins and
cutouts be overlappings where
the unloaders from either one
compressor or another may be
active.
In such cases the unloaders on the
compressor with the lowest number
of hours will be cut in, and the others
cut out.
The changeover will take place at
6-second intervals.
Coupling
mode
Compressor connections
Set
"C16"
to
Set
"C08"
to
Relay no.
Coupling mode
Coupling mode 1 =
sequential
operation.
Coupling mode 2 =
cyclic
operation.
Coupling mode 3 =
cyclic
and binary
operation where the compressor
capacities are, as follows:
1: 9%
2: 18%
3: 36%
4: 36%
There is cyclic coupling at 3 and 4,
and binary on 1, 2 and 3/4.
(for c16=4 only)
Equalised operation
When C16 = 21 to 26, compressor
1 + belonging unloader must have
the same capacity as each of the
subsequent compressors. The
unloading function will equalise the
cut-in capacity when the subsequent
compressors are cut in and out.
Compressor 1 will always be
operating.
User-defi ned combination.
Condenser couplings
When the compressor relays have been established the turn
comes to the fan relays.
The fi rst vacant relay
(DO1-DO8) will become the fi rst fan relay.
It will be followed by the subsequent relays. If more relays are
required than the vacant DO relays, a relay module can be
connected to the analog output. The function is, as follows:
If there are up to four external fans on an EKC 331:
If there are more than four external fans on two EKC 331 units:
1.
2.
Output signal from EKC 531D1
In EKC 331 the voltage range must be set to 0-5 V (“o10” = 6).
In EKC 331 the number of steps must be set to 4 (“o19” = 4) (also when
fewer fans are connected).
Output signal from EKC 531D1
In the fi rst EKC 331, set 0-5 V (“o10” = 6).
In the second EKC 331, set 5-10 V (“o10” = 7).
In both EKC’s the number of steps must be set to 4 (“o19” = 4) (also when
fewer fans are connected to the second EKC).
Connection
Connection
If the entire condenser capacity is to be controlled by a
frequency converter, EKC 531D1 must send an analog
signal about the required capacity (“c29” = 9).
The signal varies from 0 to 10 V. Signal and capacity
have the following context.
EKC 531D1
Instructions RI8HU352 © Danfoss 12/2004
3
Operation
Menu survey EKC 531D1
SW: 1.22
Para-
meter
Min.
Max.
Factory
setting
Display
The values will be shown with three digits, and with a setting you
can determine whether the pressures are to be shown in °C or i °F.
Function
Normal display
Shows P0 in EKA 162 (display with but-
tons)
-
°C
Shows Pc in EKA 161
-
°C
P0 reference
Neutral zone
r01
0.1 °C
20 °C
4.0
Correction of signal from P0 sensor
r04
-10 °C
10 °C
0.0
Select unit (0=bar and °C, 1=Psig and °F)
r05
0
1
0
Start/Stop of regulation
r12
OFF
ON
1
EKA 162
For operation and display of
evaporating pressure. The
light-emitting diodes on the
left-hand side fl ash when
there is an alarm.
EKA 161
For display of condensing
pressure.
Reference off set for P0
r13
-20 °C
20 °C
0.0
Set regulation setpoint for P0
r23
-99 °C
30 °C
0.0
Shows total P0 reference
r24
°C
0.0
Limitation: P0 reference max. value *
r25
-99 °C
30 °C
30.0
Limitation: P0 reference min. value *
r26
-99 °C
0 °C
-99.9
Displacement of P0 (ON=active “r13”)
r27
OFF
ON
0
Pc reference
Set regulation setpoint for Pc
The buttons
When you want to change a setting, the two buttons will give you
a higher or lower value depending on the button you are push-
ing. But before you change the value, you must have access to the
menu. You obtain this by pushing the upper button for a couple
of seconds - you will then enter the column with parameter codes.
Find the parameter code you want to change and push the two
buttons simultaneously. When you have changed the value, save
the new value by once more pushing the two buttons simultane-
ously.
r28
-25 °C
75 °C
35
Shows total Pc reference
r29
°C
10
Limitation: Pc referencen max. value
r30
-99 °C
99 °C
99.9
Limitation: Pc referencen min. value
r31
-99 °C
99 °C
-99.9
Correction of signal from Pc sensor
r32
-10 °C
10 °C
0.0
Pc reference variation.1 and 2 are PI-
regulation
1: Fixed reference. “r28” is used
2: Variable reference. Outdoor tempera-
ture (Sc3) included in the reference
3: As 1, but with P-regulation (Xp-band)
4: As 2, but with P-regulation (Xp-band)
r33
1
4
1
Gives access to the menu (or cutout an alarm)
Gives access to changes
Reference off set for Pc
r34
-20 °C
20 °C
0.0
Saves a change
Capacity
Min. ON time for relays
c01
0 min
30 min. 0
Min. time period between cutins of same
relay
c07
0 min.
60 min
4
Operation
1. Push the upper button until a parameter is shown
2. Push one of the buttons and fi nd the parameter you want to
change
3. Push both buttons simultaneously until the parameter value is
shown
4. Push one of the buttons and select the new value
5. Push both buttons again to conclude the setting
Defi nition of regulation mode
1: Sequential (step mode / FILO)
2: Cyclic (step mode / FIFO)
3: Binary and cyclic
c08
1
3
1
If a regulation mode with unloaders is
selected, the relay must be defi ned to:
0: Cut in when more capacity is required
1: Cut out when more capacity is required
c09
0
1
0
Regulation parameter for + Zone
c10
0.1 K
20 K
4.0
During operation it is possible to show the condensing pressure
on the display EKA 162 by pushing the lower button short.
Regulation parameter for + Zone
c11
0.1 min 60 min
4.0
0.1
min.
Regulation parameter for ++ Zone
c12
20 min
2.0
Quick- start
If you wish to start the system in a hurry so that refrigeration can
be commenced you can set the following eight parameters: r23
– r28 – c08 – c09 – c16 – c29 – o30, and fi nally r12.
When regulation has then started you can go through the
remaining parameters and adjust these.
Regulation parameter for - Zone
c13
0.1 K
20 K
4.0
0.1
min.
Regulation parameter for - Zone
c14
60 min
1.0
0.02
min.
Regulation parameter for - - Zone
c15
20 min
0.5
Defi nition of compressor connections.See
options on page 10.
c16
0
26
0
The following “c17” to “c28” is only relevant
if “c16” has been selected to 0.
A code will then have to be set for the
relays that are to be ON at the diff erent
steps:
Step 1 (M&M operation)
c17
0
15
0
Literature survey:
Manual EKC 531D1
RS8DD---
Installation guide, Data communication link
RC8AC---
Step 2 (M&M operation)
c18
0
15
0
Step 3 (M&M operation)
c19
0
15
0
Factory setting
If you need to return to the factory-set values, it can be done in this way:
- Cut out the supply voltage to the controller
- Keep both buttons depressed at the same time as you reconnect the supply voltage
* also applies to regulation with reference displacement
Continues...
4
Instructions RI8HU352 © Danfoss 12/2004
EKC 531D1
Pc pressure transmitter’s working range
- max. value
Step 4 (M&M operation)
c20
0
15
0
o48
1 bar
60 bar
34.0
Step 5 (M&M operation)
c21
0
15
0
Read temperature at sensor "Saux1"
o49
0.0 °C
°C 22.4
Step 6 (M&M operation)
c22
0
15
0
Operating hours of relay 5 (value time
1000)
o50
0.0 h
99.9 h
0.0
Step 7 (M&M operation)
c23
0
15
0
Step 8 (M&M operation)
c24
0
15
0
Operating hours of relay 6 (value time
1000)
o51
0.0 h
99.9 h
0.0
Step 9 (M&M operation)
c25
0
15
0
Operating hours of relay 7 (value time
1000)
Step 10 (M&M operation)
c26
0
15
0
o52
0.0 h
99.9 h
0.0
Step 11 (M&M operation)
c27
0
15
0
Operating hours of relay 8 (value time
1000)
o53
0.0 h
99.9 h
0.0
Step 12 (M&M operation)
c28
0
15
0
Defi nition of condenser:
1-8:
Total number of fan relays
9:
Only via analog output and start of
frequency converter
Service
Read temperature at sensor "Sc3" u44 °C 23.5
Read temperature at sensor "Sc4" u45 °C 8.1
*) This setting will only be possible if a data communication moduel has
been installed in the controller.
c29
0/OFF
9
0
Proportinal band Xp for (P= 100/Xp) con-
denser regulation
n04
0.2 K
40 K
10
I: Integration time Tn for condenser regula-
tion
n05
30 s
600 s
150
Alarm
Delay time for a "Saux1" alarm
A03
0 min.
90 min
30
Low alarm and safety limit for P0
A11
-99°C
30°C
-10
600 s
/off
Delay time for a DI1 alarm
A27
1 s
600
600 s
/off
Delay time for a DI2 alarm
A28
1 s
600
600 s
/off
Delay time for a DI3 alarm
A29
1 s
600
Upper alarm and safety limit for Pc
A30
-10 °C
99 °C
60.0
0 °C
/off
Upper alarm limit for sensor "Saux1"
A32
140°C
0.0
Miscellaneous
Controllers address
o03*
1
60
The controller can give the following messages
E1
On/off switch (service-pin message)
o04*
-
-
Error
message
Fault in controller
Access code
o05
off (-1)
100
E2
Regulation is outside the range, or the control
signal is defective
Used sensor type for Sc3, Sc4 and "Saux1"
0=
PT1000,
1=
PTC1000
2-7=variations with temperature sensor
on P0 and Pc. See earlier in the manual.
o06
0
7
0
A2
Alarm
message
Low P0
A11
Refrigerant not selected
Set supply voltage frequency
o12
50 Hz
60 H
0
Manual control of outputs:
0:
No override
1-10:
1 will cut in relay 1, 2 relay 2, etc.
11-18:
Gives voltage signal on the analog
output. (11 gives 1.25 V, and so on in steps
of 1.25 V
A17
High Pc
A19
DO 1 alarm. Terminal 29 is open
o18
0
18
0
A20
DO 2 alarm. Terminal 30 is open
A21
DO 3 alarm. Terminal 31 is open
P0 pressure transmitter’s working range
- min. value
A22
DO 4 alarm. Terminal 32 is open
o20
-1 bar
0 bar
-1.0
A23
DO 5 alarm. Terminal 33 is open
P0 pressure transmitter’s working range
- max. value
o21
1 bar
40 bar
12.0
A24
DO 6 alarm. Terminal 34 is open
Use of DI4-input
0=
not used.
1=
P0 displacement.
2=
alarm
function. Alarm="A31"
A25
DO 7 alarm. Terminal 35 is open
o22
0
2
0
A26
DO 8 alarm. Terminal 36 is open
Operating hours of relay 1 (value time
1000)
o23
0.0 h
99.9 h
0.0
A27
Room temperature alarm (housing temp.)
Operating hours of relay 2 (value time
1000)
o24
0.0 h
99.9 h
0.0
A28
DI 1 alarm. Terminal 46 interrupted
Operating hours of relay 3 (value time
1000
A29
DI 2 alarm. Terminal 47 interrupted
o25
0.0 h
99.9 h
0.0
A30
DI 3 alarm. Terminal 49 interrupted
Operating hours of relay 4 (value time
1000)
o26
0.0 h
99.9 h
0.0
A31
DI 4 alarm. Terminal 50 interrupted
Setting of refrigerant
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 defi 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. 30=R417A
A32
DI 5 alarm. Terminal 52 interrupted
A45
Regulation stopped
S2
Status
message
Wait for “c01”
o30
0
30
0
S5
Wait for “c07”
S8
Wait for “c11” or “c12”
S9
Wait for “c14” or “c15”
Use of DI5-input
0=
not used.
1=
Pc displacment.
2=
alarm
function. Alarm="A32"
S10
Refrigeration stopped by the internal or external
start/stop function
o37
0
2
0
PS
Info
Access code is required before you have access to
the settings
Pc pressure transmitter’s working range
- min. value
o47
-1 bar
0 bar
-1.0
EKC 531D1
Instructions RI8HU352 © Danfoss 12/2004
5
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