Controller for temperature control - EKC 202D1 Manual

Controller for temperature control - EKC 202D1 Manual
Controller for temperature control
- EKC 202D1
Manual
Contents
Introduction........................................................................................................ 2
Operation............................................................................................................. 3
Applications........................................................................................................ 7
Survey of functions........................................................................................... 8
Operation...........................................................................................................17
Menu survey......................................................................................................18
Ordering.............................................................................................................21
Connections......................................................................................................22
Data......................................................................................................................23
Introduction
Application
• The controller is used for temperature control refrigeration
appliances in supermarkets
• With many predefined applications one unit will offer you
several options. Flexibility has been planned both for new
installations and for service in the refrigeration trade
Principle
The controller contains a temperature control where the signal
can be received from one or two temperature sensors.
The thermostat sensors are either placed in the cold air flow after
the evaporator, in the warm air flow just before the evaporator,
or both. A setting will determine how great an influence the two
signals are to have on the control.
A measurement of the defrost temperature can be obtained
directly through the use of an S5 sensor or indirectly through
the use of the S4 measurement. Four relays will cut the required
functions in and out – the application determines which. The
options are the following:
• Refrigeration (compressor or relay)
• Fan
• Defrost
• Rail heat
• Alarm
• Light
The different applications are described on page 7.
Advantages
• Several applications in the same unit
• The controller has integrated refrigeration-technical functions,
so that it can replace a whole collection of thermostats and
timers
• Buttons and seal imbedded in the front
• Easy to remount data communication
• Quick set-up
• Two temperature references
• Digital inputs for various functions
• Clock function with super cap backup
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EKC 202D1
Operation
Sensors
Up to two thermostat sensors can be connected to the controller.
The relevant application determines how.
A sensor in the air before the evaporator: S3
This connection is primarily used when control is based on area.
A sensor in the air after the evaporator: S4
This connection is primarily used when refrigeration is controlled
and there is a risk of a too low temperature near the products.
A sensor before and after the evaporator: S3 + S4
This connection offers you the possibility of adapting the
thermostat, the alarm thermostat and the display to the relevant
application. The signal to the thermostat, the alarm termostat
and the display is set as a weighted value between the two
temperatures, and 50% will for example give the same value from
both sensors.
The signal to the thermostat, the alarm thermostat and the display
can be set independently of one another.
Defrost sensor: S5
The best signal concerning the evaporator’s temperature
is obtained from a defrost sensor mounted directly on the
evaporator. Here the signal may be used by the defrost function,
so that the shortest and most energy-saving defrost can take
place.
If a defrost sensor is not required, defrost can be stopped based
on time, or S4 can be selected.
Change of temperature reference
In an impulse appliance, for example, used for various product
groups. Here the temperature reference is changed easily with
a contact signal on a digital input. The signal raises the normal
thermostat value by a predefined amount. At the same time the
alarm limits with the same value are displaced accordingly.
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
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Digital inputs
There are two digital inputs both of which can be used for the
following functions:
- Case cleaning
- Door contact function with alarm
- Starting a defrost
- Coordinated defrost
- Change-over between two temperature reference
- Retransmission of a contact’s position via data communication
Case cleaning function
This function makes it easy to steer the refrigeration appliance
through a cleaning phase. Via three pushes on a switch you
change from one phase to the next phase.
The first push stops the refrigeration – the fans keep working
”Later”: The next push stops the fans
”Still later”: The next push restarts refrigeration
The different situations can be followed on the display.
On the network a cleaning alarm is transmitted to the system unit.
This alarm can be ”logged” so that proof of the sequence of events
is provided.
-
+
+
°C
1
÷
+
Fan
2
÷
÷
Off
3
+
+
°C
Door contact function
In cold rooms and frost rooms the door switch can switch the light
on and off, start and stop the refrigeration and give alarm if the
door has remained open for too long.
Overriding of light diagram
(Only for use with circuit diagram 2 in which relay 4 is used to
control the light)
By holding the middle button in for four seconds, the light relay
will change over to the opposite position. An “-L-” will appear in
the display as a conformation.
The override will only apply to the current On or Off period. The
next change will follow the planned diagram.
If the light function is set to follow the door function, the override
will not be possible and the door function will be followed.
An override cannot be performed if the regulation is stopped by
the “Main switch” or “Appliance cleaning function”, or if it is awaiting the "Power up delay”.
4
The middle button is
activated here
The middle button is
activated here
Planned change
via diagram
Position of
light relay
Manual RS8FL202 © Danfoss 08-2009
EKC 202D1
Defrost
Depending on the application you may choose between the following defrost methods:
Natural: Here the fans are kept operating during the defrost
Electric: The heating element is activated
Brine:
The valve is kept open so that the brine can flow through the evaporator
Gas
Simple defrost
Start of defrost
A defrost can be started in different ways
Interval:
Defrost is started at fixed time intervals, say, every eight hour
Refrigeration time:
Defrost is started at fixed refrigeration time inter-
vals, in other words, a low need for
refrigeration will ”postpone” the coming defrost
Schedule:
Here defrost can be started at fixed times of the day and night. However, max. 6 times
Contact:
Defrost is started with a contact signal on a digital input
Network:
The signal for defrost is received from a system unit
via the data communication
S5 temp
In 1:1 systems the efficiency of the evaporator can be followed. Icing-up will start a defrost.
Manual:
An extra defrost can be activated from the control-
ler’s lower-most button
All the mentioned methods can be used at random – if just one
them is activated a defrost will be started.
Coordinated defrost
There are two ways in which coordinated defrost can be arranged.
Either with wire connections between the controllers or via data
communication
Wire connections
One of the controllers is defined to be the controlling unit and
a battery module may be fitted in it so that the clock is ensured
backup.
The controlling unit is the controller with a defrost diagram installed in t1-t6, t11-t16. This is indicated when the “HACCP” symbol
lights up in the front.
When a defrost is started all the other controllers will follow
suit and likewise start a defrost. After the defrost the individual
controllers will move into waiting position. When all are in waiting
position there will be a change-over to refrigeration.
(If just one in the group demands defrost, the others will follow
suit. A manual start of the defrost function will only apply to the
current controller.).
Max. 15
Defrost via data communication
All controllers are fitted with a data communication module, and
via the override function from a gateway/system manager the
defrost can be coordinated.
Defrost on demand
1 Based on refrigeration time
When the aggregate refrigeration time has passed a fixed time,
a defrost will be started.
2 Based on temperature
The controller will constantly follow the temperature at S5.
Between two defrosts the S5 temperature will become lower
the more the evaporator ices up (the compressor operates for a
longer time and pulls the S5 temperature further down). When
the temperature passes a set allowed variation the defrost will
be started.
This function can only work in 1:1 systems
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Manual RS8FL202 © Danfoss 08-2009
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Night time cover function
The controller has a function that automatically detects when a
night time cover has been placed over the refrigeration appliance.
This function requires the use of both an S3 and S4 sensor.
When the night time cover is placed over the appliance, heat
intake and thus the need for increased cooling are reduced. The
temperature difference between S3 and S4 will be reduced, and
the controller will change to night operation mode once this
difference becomes less than the set difference (night time cover
difference).
Example
During day operation there is a temperature difference of e.g. 8K
between S3 and S4.
During operating with a night time cover the difference drops to
e.g. 3 K.
r75 Cover diff must be set to a value between the two values. In
this case, 5.5 k.
This function is not active during the following operating
situations:
Interrupted regulation
Appliance cleaning
Defrosting
Pull-down sequence
If the controller registers a negative difference, it will “see” this as
an inversion of the two sensors. It will therefore send the alarm,
“S3/S4 inverted”.
Night time cover
placed over
Night
appliance
time cover
detected
Night
time cover
removed
Removal of
night time
cover detected
Example of temperature sequence
Example of settings:
r15 Ther S4% = 100%
r61 Ther S4% Night = 0%
r13 Night setback = 3 K
r75 Cover dif = 5 K
This function has no influence on the light function.
Extra module
• The controller can afterwards be fitted with an insertion module
if the application requires it.
The controller has been prepared with plug, so the module
simply has to be pushed in
- Battery module
The module guarantees voltage to the controller if the supply
voltage should drop out for more than four hours. The clock
function can thus be protected during a power failure.
- Battery and buzzer module
As above + sound buzzer
- Data communication
If you require operation from a PC, a data communication module has to be placed in the controller.
• External display
If it is necessary to indicate the temperature on the front of
refrigeration appliance, a display can be mounted. The extra display will show the same information as the controller's display,
but does not incorporate buttons for operation.
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Applications
Here is a survey of the controller’s field of application.
A setting will define the relay outputs so that the controller’s
interface will be targeted to the chosen application.
On page 18 you can see the relevant settings for the respective
wiring diagrams.
Refrigeration control with one compressor
The functions are adapted to small refrigeration systems which
either may be refrigeration appliances or cold rooms.
The three relays can control the refrigeration, the defrost and the
fans, and the fourth relay can be used for either alarm function,
light control or rail heat control
• The alarm function can be linked up with a contact function
from a door switch. If the door remains open longer than allowed there will be an alarm.
• The light control can also be linked up with a contact function
from a door switch. An open door will switch on the light and
it will remain lit for two minutes after the door has been closed
again.
• The rail heat function can be used in refrigeration or freezing
appliances or on the door’s heating element for frost rooms.
S3 and S4 are temperature sensors. The application will determine whether either one or the other or both sensors are to be
used. S3 is placed in the air flow before the evaporator. S4 after
the evaporator.
A percentage setting will determine according to what the
control is to be based. S5 is a defrost sensor and is placed on the
evaporator.
DI1 and DI2 are contact functions that can be used for one of the
following functions: door function, alarm function, defrost start,
external main switch, night operation, change of thermostat reference, appliance cleaning, forced refrigeration or coordinated
defrost. See the functions in settings o02 and o37.
1
The fans can be stopped during defrost and they may also follow
a door switch’s open/close situation.
There are several other functions for the alarm function as well
as the light control, rail heat control and fans. Please refer to the
respective settings.
The connections shown in applications 1, 2 and 3 are the
recommended connections if an extra display is not installed.
If an extra display (type EKA 163A) is connected, terminal 21
must be used for the display, and solely for the display.
2
3
The remaining connections can be made as follows:
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Manual RS8FL202 © Danfoss 08-2009
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Survey of functions
Function
Para- Parameter by operation via data
meter communication
Normal display
Normally the temperature value from one of the two thermostat sensors S3 or S4 or a
mixture of the two measurements is displayed.
In o17 the ratio is determined.
Thermostat
Set point
Regulation is based on the set value plus a displacement, if applicable. The value is set
via a push on the centre button.
The set value can be locked or limited to a range with the settings in r02 and r 03.
The reference at any time can be seen in ”u28 Temp. ref”
Differential
When the temperature is higher than the reference + the set differential, the compressor relay will be cut in. It will cut out again when the temperature comes down to
the set reference.
Display air (u56)
Thermostat control
Cutout °C
r01
Differential
To avoid a too high setting of the setpoint, the max. allowable reference value must
be lowered.
To avoid a too low setting of the setpoint, the min. allowable reference value must be
increased.
Correction of the display’s temperature showing
If the temperature at the products and the temperature received by the controller are
not identical, an offset adjustment of the shown display temperature can be carried
out.
Temperature unit
Set here if the controller is to show temperature values in °C or in °F.
r02
Max cutout °C
r03
Min cutout °C
r04
Disp. Adj. K
r05
Temp. unit
°C=0. / °F=1
(Only °C on AKM, whatever the setting)
Correction of signal from S4
Compensation possibility through long sensor cable
r09
Adjust S4
Correction of signal from S3
Compensation possibility through long sensor cable
r10
Adjust S3
Start / stop of refrigeration
With this setting refrigeration can be started, stopped or a manual override of the
outputs can be allowed.
Start / stop of refrigeration can also be accomplished with the external switch function connected to a DI input.
Stopped refrigeration will give a ”Standby alarm”.
Night setback value
The thermostat’s reference will be the setpoint plus this value when the controller
changes over to night operation. (Select a negative value if there is to be cold accumulation.)
Selection of thermostat sensor
Here you define the sensor the thermostat is to use for its control function. S3, S4, or a
combination of them. With the setting 0%, only S3 is used (Sin). With 100%, only S4.
r12
Main Switch
Ref.
Dif.
Setpoint limitation
The controller’s setting range for the setpoint may be narrowed down, so that much
too high or much too low values are not set accidentally - with resulting damages.
1: Start
0: Stop
-1: Manual control of outputs allowed
r13
Night offset
r15
Ther. S4 %
Activation of reference displacement
When the function is changed to ON the thermostat differential will be increased by
the value in r40. Activation can also take place via input DI1 or DI2 (defined in o02 or
o37).
r39
Th. offset
Value of reference displacement
The thermostat reference and the alarm values are shifted the following number of
degrees when the displacement is activated. Activation can take place via r39 or input
DI
r40
Th. offset K
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EKC 202D1
Selection of thermostat sensor S4% during night operation with night blinds
Here you define the sensor the thermostat is to use for its control function.
S3, S4, or a combination of them.
With the setting 0%, only S3 is used (Sin). With 100%, only S4.
Temperature difference for night time cover
When the night time cover is placed over the appliance, the difference between
the S3 and S4 sensors will fall due to the reduced cooling loss. Here you can set the
temperature difference that must be reached for the regulation to change to night
operation.
This function will remain inactive if set to 0 K.
r61
Ther.S4% Ngt
r75
Cover diff
Night setbck
(start of night signal)
Forced cool.
(start of forced cooling)
Alarm settings
Alarm
The controller can give alarm in different situations. When there is an alarm all the
light-emitting diodes (LED) will flash on the controller front panel, and the alarm relay
will cut in.
Alarm delay (short alarm delay)
If one of the two limit values is exceeded, a timer function will commence. The alarm
will not become active until the set time delay has been passed. The time delay is set
in minutes.
A03
With data communication the importance of the individual alarms can be
defined. Setting is carried out in the
“Alarm destinations” menu.
Alarm delay
Time delay for door alarm
The time delay is set in minutes.
The function is defined in o02 or in o37.
Time delay for cooling (long alarm delay)
This time delay is used during start-up, during defrost, immediately after a defrost.
There will be change-over to the normal time delay (A03) when the temperature has
dropped below the set upper alarm limit.
The time delay is set in minutes.
Upper alarm limit
Here you set when the alarm for high temperature is to start. The limit value is set in
°C (absolute value). The limit value will be raised during night operation. The value is
the same as the one set for night setback, but will only be raised if the value is positive.
The limit value will also be raised in connection with reference displacement r39.
Lower alarm limit
Here you set when the alarm for low temperature is to start. The limit value is set in °C
(absolute value).
The limit value will also be raised in connection with reference displacement r39.
Delay of a DI1 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o02.
Delay of a DI2 alarm
A cut-out/cut-in input will result in alarm when the time delay has been passed. The
function is defined in o37
Definition of alarm sensor
Both S3 and S4, or a combination of both units, can be used as an alarm sensor. A03
and A12 are to be used for time delay.
1: 1: Here a combination of S3 and S4 is used. Weighting is set in A36. Alarm limits can
be set in A13 and A14. (A56 and A57 are not used.)
2: Here there are alarm limits for both S3 and S4. S4 limits can be set in A13 and A14.
S3 limits can be set in A56 and A57 (A36 is not used).
Signal to the alarm thermostat
Here you have to define the ratio between the sensors which the alarm thermostat
has to use. S3, S4 or a combination of the two.
With setting 0% only S3 is used. With 100% only S4 is used
High alarm limit for S3.
Here you must set the point at which the high temperature alarm is activated. Limit
value is set °C (absolute value).
The limit value is raised during night operation. The value is the same as that set for
the night increase value, but it is only raised if the value is positive.
The limit value is also raised for reference displacement r39.
Low alarm limit for S3
Here you must set the point at which the low temperature alarm is activated. Limit
value is set °C (absolute value).
The limit value is also raised for reference displacement r39.
A04
DoorOpen del
A12
Pulldown del
A13
HighLim Air
A14
LowLim Air
A27
AI.Delay DI1
A28
AI.Delay DI2
A33
AirAlarm Cfg
A36
Alarm S4%
A56
HighLimS3
A57
LowLimS3
Reset alarm
EKC error
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
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Compressor
Compressor control
The compressor relay works in conjunction with the thermostat. When the thermostat calls for refrigeration will the compressor relay be operated.
Running times
To prevent irregular operation, values can be set for the time the compressor is to run
once it has been started. And for how long it at least has to be stopped.
The running times are not observed when defrosts start.
Min. ON-time (in minutes)
Min. OFF-time (in minutes)
Reversed relay function for D01
0: Normal function where the relay cuts in when refrigeration is demanded
1: Reversed function where the relay cuts out when refrigeration is demanded (this
wiring produces the result that there will be refrigeration if the supply voltage to the
controller fails).
The LED on the controller’s front will show whether refrigeration is in progress.
Defrost
The controller contains a timer function that is zeroset after each defrost start.
The timer function will start a defrost if/when the interval time is passed.
The timer function starts when voltage is connected to the controller, but it is displaced the first time by the setting in d05.
If there is power failure the timer value will be saved and continue from here when
the power returns.
This timer function can be used as a simple way of starting defrosts, but it will always
act as safety defrost if one of the subsequent defrost starts is not received.
The controller also contains a real-time clock. By means of settings of this clock and
times for the required defrost times, defrost can be started at fixed times of the day.
If there is a risk of power failure for periods longer than four hours, a battery module
should be mounted in the controller.
Defrost start can also be accomplished via data communication, via contact signals or
manual start-up.
All starting methods will function in the controller. The different functions have to be
set, so that defrosts do not ”come tumbling” one after the other.
Defrost can be accomplished with electricity, hotgas or brine.
The actual defrost will be stopped based on time or temperature with a signal from a
temperature sensor.
Defrost method
Here you set whether defrost is to be accomplished with electricity, gas, brine or
"non".
During defrost the defrost relay will be cut in.
(With brine the ”refrigeration control valve” will be kept open during defrost)
c01
c02
c30
Min. On time
Min. Off time
Cmp relay NC
Comp Relay
Here you can read the status of the
compressor relay, or you can forcecontrol the relay in the ”Manual
control” mode
Defrost control
d01
Def. method
0 = non
1 = El
2 = Gas
3= Brine
Defrost stop temperature
The defrost is stopped at a given temperature which is measured with a sensor (the
sensor is defined in d10).
The temperature value is set.
d02
Def. Stop Temp
Interval between defrost starts
The function is zeroset and will start the timer function at each defrost start. When
the time has expired the function will start a defrost.
The function is used as a simple defrost start, or it may be used as a safeguard if the
normal signal fails to appear.
If master/slave defrost without clock function or without data communication is used,
the interval time will be used as max. time between defrosts.
If a defrost start via data communication does not take place, the interval time will be
used as max. time between defrosts.
When there is defrost with clock function or data communication, the interval time
must be set for a somewhat longer period of time than the planned one, as the
interval time will otherwise start a defrost which a little later will be followed by the
planned one.
In connection with power failure the interval time will be maintained, and when the
power returns the interval time will continue from the maintained value.
The interval time is not active when set to 0.
Max. defrost duration
This setting is a safety time so that the defrost will be stopped if there has not already
been a stop based on temperature or via coordinated defrost.
d03
Def Interval
(0=off )
d04
Max Def. time
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Manual RS8FL202 © Danfoss 08-2009
EKC 202D1
Time staggering for defrost cutins during start-up
The function is only relevant if you have several refrigeration appliances or groups
where you want the defrost to be staggered in relation to one another. The function is
furthermore only relevant if you have chosen defrost with interval start (d03).
The function delays the interval time d03 by the set number of minutes, but it only
does it once, and this at the very first defrost taking place when voltage is connected
to the controller.
The function will be active after each and every power failure.
Drip-off time
Here you set the time that is to elapse from a defrost and until the compressor is to
start again. (The time when water drips off the evaporator).
d05
Time Stagg.
d06
DripOff time
Delay of fan start after defrost
Here you set the time that is to elapse from compressor start after a defrost and until
the fan may start again. (The time when water is “tied” to the evaporator).
d07
FanStartDel
Fan start temperature
The fan may also be started a little earlier than mentioned under “Delay of fan start
after defrost”, if the defrost sensor S5 registers another allowable value than the one
set here.
Fan cut in during defrost
Here you can set whether fan is to operate during defrost.
d08
FanStartTemp
d09
Defrost sensor
Here you define the defrost sensor.
0: None, defrost is based on time
1: S5
2: S4
Pumpdown delay
Set the time where the evaporator is emptied of refrigerant prior to the defrost.
d10
FanDuringDef
0=no
1=yes
DefStopSens.
d16
Pump dwn del.
Defrost on demand – aggregate refrigeration time
Set here is the refrigeration time allowed without defrosts. If the time is passed, a
defrost will be started.
With setting = 0 the function is cut out.
Defrost on demand – S5 temperature
The controller will follow the effectivity of the evaporator, and via internal calculations and measurements of the S5 temperature it will be able to start a defrost when
the variation of the S5 temperature becomes larger than required.
Here you set how large a slide of the S5 temperature can be allowed. When the value
is passed, a defrost will start.
The function can only be used in 1:1 systems when the evaporating temperature
will become lower to ensure that the air temperature will be maintained. In central
systems the function must be cut out.
With setting = 20 the function is cut out
Minimum defrost time
Setting of the smallest permissible defrost time.
If you wish to see the temperature at the defrost sensor, push the controller’s lowermost button.
If you wish to start an extra defrost, push the controller’s lowermost button for four
seconds.
You can stop an ongoing defrost in the same way
d18
MaxTherRunT
d19
CutoutS5Dif.
d24
Min.Def.Time
The LED on the controller’s front will indicate whether a defrost is going on.
Defrost temp.
Def Start
Here you can start a manual defrost
Defrost Relay
Here you can read the defrost relay
status or you can force-control the
relay in “Manual control” mode.
Hold After Def
Shows ON when the controller is
operating with coordinated defrost.
Defrost state
Status on defrost.
1=pump down / defrosting
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
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Fan
Fan stopped at cut-out compressor
Here you can select whether the fan is to be stopped when the compressor is cut out
Delay of fan stop when compressor is cut out
If you have chosen to stop the fan when the compressor is cut out, you can delay the
fan stop when the compressor has stopped.
Here you can set the time delay.
Fan stop temperature
The function stops the fans in an error situation, so that they will not provide power
to the appliance. If the defrost sensor registers a higher temperature than the one set
here, the fans will be stopped. There will be re-start at 2 K below the setting.
The function is not active during a defrost or start-up after a defrost.
With setting +50°C the function is interrupted.
The LED on the controller’s front will indicate whether a defrost is going on.
Real-time clock
The controller can accommodate one insertion module which may either be a data
communication module or a battery module for the real-time clock.
The battery module is used in conjunction with the real-time clock and will keep the
clock going during lengthy power failures.
Real-time clock
You can set up to six individual times for defrost starts for each 24-hour period. There
is also a date indication used for registration of temperature measurements.
Defrost start, hour setting
Defrost start, minute setting (1 and 11 belong together, etc.)
When all t01 to t16 equal 0 the clock will not start defrosts.
Clock: Hour setting
F01
Fan control
Fan stop CO
(Yes = Fan stopped)
F02
Fan del. CO
F04
FanStopTemp.
Fan Relay
Here you can read the fan relay status,
or force-control the relay in “Manual
control” mode.
(Times cannot be set via data communication. Settings are only relevant
when there is no data communication).
t01-t06
t11-t16
t07
Clock: Minute setting
t08
Clock: Date setting
t45
Clock: Month setting
t46
Clock: Year setting
t47
Miscellaneous
Delay of output signal after start-up
After start-up or a power failure the controller’s functions can be delayed so that overloading of the electricity supply network is avoided.
Here you can set the time delay.
Digital input signal - DI1
The controller has a digital input 1 which can be used for one of the following functions:
Off: The input is not used
1) Status display of a contact function
2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A4” is passed, an alarm
will be given and refrigeration will be resumed.
3) Door alarm. When the input is open it signals that the door is open. When the time
setting in “A4” is passed, there will be alarm.
4) Defrost. The function is started with a pulse pressure. The controller will register
when the DI input is activated. The controller will then start a defrost cycle. If the
signal is to be received by several controllers it is important that ALL connections
are mounted the same way (DI to DI and GND to GND).
5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.
6) Night operation. When the input is short-circuited, there will be regulation for
night operation.
7) Reference displacement when DI1 is short-circuited. Displacement with “r40”.
8) Separate alarm function. Alarm will be given when the input is short-circuited.
9) Separate alarm function. Alarm will be given when the input is opened. (For 8 and
9 the time delay is set in A27)
10) Case cleaning. The function is started with a pulse pressure. Cf. also description on
page 4.
11) Forced refrigeration when the input is short-circuited.
12
Manual RS8FL202 © Danfoss 08-2009
o01
o02
Miscellaneous
DelayOfOutp.
DI 1 Config.
Definition takes place with the numerical value shown to the left.
(0 = off )
DI state
(Measurement)
The DI input’s present status is shown
here. ON or OFF.
EKC 202D1
If the controller is built into a network with data communication, it must have an
address, and the master gateway of the data communication must then know this
address.
These settings can only be made when a data communication module has been
mounted in the controller and the installation of the data communication cable has
been finished.
This installation is mentioned in a separate document “RC8AC”.
The address is set between 1 and 240 , gateway determined
After installation of a data communication module the controller can be
operated on an equal footing with the
other controllers in ADAP-KOOL®
refrigeration controls.
o03
The address is sent to the gateway when the menu is set in pos. ON
IMPORTANT: Before you set o04, you MUST set o61. Otherwise you will be transmitting incorrect data.
Access code 1 (Access to all settings)
If the settings in the controller are to be protected with an access code you can set a
numerical value between 0 and 100. If not, you can cancel the function with setting 0.
(99 will always give you access).
Sensor type
Normally a Pt 1000 sensor with great signal accuracy is used. But you can also use a
sensor with another signal accuracy. That may either be a PTC sensor (1000 ohm at
25°C) or an NTC sensor (5000 Ohm at 25°C).
All the mounted sensors must be of the same type.
Display step
Yes: Gives steps of 0.5°
No: Gives steps of 0.1°
Max. standby time after coordinated defrost
When a controller has completed a defrost it will wait for a signal which tells that the
refrigeration may be resumed. If this signal fails to appear for one reason or another,
the controller will itself start the refrigeration when this standby time has elapsed.
Select signal for the display S4%
Here you define the signal to be shown by the display.
S3, S4, or a combination of the two.
With setting 0% only S3 is used. With 100% only S4.
o04
o05
-
o06
SensorConfig
Pt = 0
PTC = 1
NTC = 2
o15
Disp. Step = 0.5
o16
Max HoldTime
o17
Disp. S4%
Digital input signal - D2
The controller has a digital input 2 which can be used for one of the following functions:
Off: The input is not used.
1)Status display of a contact function
2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A4” is passed, an alarm
will be given and refrigeration resumed.
3) Door alarm. When the input is open it signals that the door is open. When the time
setting in “A4” is passed an alarm will be given.
4) Defrost. The function is started with a pulse pressure. The controller will register
when the DI input is activated. The controller will then start a defrost cycle. If the
signal is to be received by several controllers it is important that ALL connections
are mounted the same way (DI to DI and GND to GND).
5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.
6) Night operation. When the input is short-circuited, there will be regulation for
night operation.
7) Reference displacement when DI2 is short-circuited. Displacement with “r40”.
8) Separate alarm function. Alarm will be given when the input is short-circuited.
9) Separate alarm function. Alarm will be given when the input is opened.
10) Case cleaning. The function is started with a pulse pressure. Cf. also description on
page 4.
11) Forced refrigeration when the input is short-circuited.
12) The input is used for coordinated defrost in conjunction with other controllers of
the same type
Configuration of light function (relay 4 in applications 2)
1) The relay cuts in during day operation
2) The relay to be controlled via data communication
3) The relay to be controlled by the door switch defined in either o02 or o37 where
the setting is selected to either 2 or 3. When the door is opened the relay will cut in.
When the door is closed again there will be a time delay of two minutes before the
light is switched off.
Activation of light relay
The light relay can be activated here, but only if defined in o38 with setting 2.
o37
DI2 config.
o38
Light config
o39
Light remote
Rail heat during day operation
The ON period is set as a percentage of the time
Rail heat during night operation
The ON period is set as a percentage of the time
Rail heat cycle
The period of time for the aggregate ON time + OFF time is set in minutes
o41
Railh.ON day%
o42
Railh.ON ngt%
o43
Railh. cycle
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
13
Case cleaning
The status of the function can be followed here or the function can be started manually.
0 = Normal operation (no cleaning)
1 = Cleaning with fans operating. All other outputs are Off.
2 = Cleaning with stopped fans. All outputs are Off.
If the function is controlled by a signal at the DI1 or DI2 input, the relevant status can
be seen here in the menu.
Selection of application
The controller can be defined in various ways. Here you set which of the 3 applications is required. On page 6 you can see a survey of applications.
This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.
Transfer a set of presetting to the controller
It is possible to select a quick setting of a number of parameters. It depends on
whether an application or a room is to be controlled and whether defrost is to be
stopped based on time or based on temperature. The survey can be seen on page 20.
This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.
After the setting the value will return to 0. Any subsequent adjustment/setting of
parameters can be made, as required.
Access code 2 (Access to adjustments)
There is access to adjustments of values, but not to configuration settings. If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100. If not, you can cancel the function with setting 0. If the
function is used, access code 1 (o05) must also be used.
Copy the controller’s present settings
With this function the controller’s settings can be transferred to a programming key.
The key can contain up to 25 different sets. Select a number. All settings except for
Application (o61) and Address (o03) will be copied. When copying has started the display returns to o65. After two seconds you can move into the menu again and check
whether the copying was satisfactory.
Showing of a negative figure spells problems. See the significance in the Fault Message section.
Copy from the programming key
This function downloads a set of settings earlier saved in the controller. Select the
relevant number.
All settings except for Application (o61) and Address (o03) will be copied. When copying has started the display returns to o66. After two seconds you can move back into
the menu again and check whether the copying was satisfactory. Showing of a negative figure spells problems. See the significance in the Fault Message section.
Save as factory setting
With this setting you save the controller’s actual settings as a new basic setting (the
earlier factory settings are overwritten).
o46
Case clean
o61
--- Appl. Mode (only output in Danfoss
only)
o62
-
o64
-
o65
-
o66
-
o67
- - - Night Setback
0=Day
1=Night
Service
Temperature measured with S5 sensor
Status on DI1 input. on/1=closed
Temperature measured with S3 sensor
Status on night operation (on or off ) 1=closed
Temperature measured with S4 sensor
Thermostat temperature
Read the present regulation reference
Status on DI2 output. on/1=closed
Temperature shown on display
Measured temperature for alarm thermostat
* Status on relay for cooling
* Status on relay for fan
* Status on relay for defrost
* Status on relay for railheat
* Status on relay for alarm
* Status on relay for light
Status of night time cover detection (On = night time cover has been detected)
*) Not all items will be shown. Only the function belonging to the selected application is shown.
14
Manual RS8FL202 © Danfoss 08-2009
u09
u10
u12
u13
u16
u17
u28
u37
u56
u57
u58
u59
u60
u61
u62
u63
U08
Service
S5 temp.
DI1 status
S3 air temp
Night Cond.
S4 air temp
Ther. air
Temp. ref.
DI2 status
Display air
Alarm air
Comp1/LLSV
Fan relay
Def. relay
Railh. relay
Alarm relay
Light relay
CoverDetect.
EKC 202D1
Fault message
Alarms
In an error situation the LED’s on the front will flash and the alarm relay will be activated. If you push the top button in this situation you can see the alarm report in the
display. If there is more than one, simply push the button to scroll through and view
them.
There are two kinds of error reports - it can either be an alarm occurring during the
daily operation, or there may be a defect in the installation.
A-alarms will not become visible until the set time delay has expired.
E-alarms, on the other hand, will become visible the moment the error occurs.
(An A alarm will not be visible as long as there is an active E alarm).
Here are the messages that may appear:
A1: High temperature alarm
1 = alarm
High t. alarm
A2: Low temperature alarm
Low t. alarm
A4: Door alarm
Door Alarm
A5: Information. Parameter o16 is expired
Max Hold Time
A8: High temperature alarm for S3
S3 High temp
A9: Low temperature alarm for S3
S3 Low temp
A15: Alarm. Signal from DI1 input
DI1 alarm
A16: Alarm. Signal from DI2 input
DI2 alarm
A45: Standby position (stopped refrigeration via r12 or DI input)
Standby mode
A59: Case cleaning. Signal from DI1 or DI2 input
Case cleaning
A81: Switched S3 and S4 sensors? (S3 temperature registered lower than S4 temp.)
S3S4 switched
Max. def time
E1: Faults in the controller
EKC error
E6: Fault in real-time clock. Check the battery / reset the clock.
-
E25: Sensor error on S3
S3 error
E26: Sensor error on S4
S4 error
E27: Sensor error on S5
S5 error
When copying settings to or from a copying key with functions o65 or o66, the following information may appear:
0: Copying concluded and OK
4: Copying key not correctly mounted
5: Copying was not correct. Repeat copying
6: Copying to EKC incorrect. Repeat copying
7: Copying to copying key incorrect. Repeat copying
8: Copying not possible. Order number or SW version do not match
9: Communication error and timeout
10: Copying still going on
(The information can be found in o65 or o66 a couple of seconds after copying has
been started).
Alarm destinations
The importance of the individual
alarms can be defined with a setting
(0, 1, 2 or 3)
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
15
Operating status
(Measurement)
The controller goes through some regulating situations where it is just waiting for
the next point of the regulation. To make these “why is nothing happening” situations
visible, you can see an operating status on the display. Push briefly (1s) the upper button. If there is a status code, it will be shown on the display.
The individual status codes have the following meanings:
EKC State:
(Shown in all menu displays)
S0: Regulating
0
S1: Waiting for end of the coordinated defrost
1
S2: When the compressor is operating it must run for at least x minutes.
2
S3: When the compressor is stopped, it must remain stopped for at least x minutes.
3
S4: The evaporator drips off and waits for the time to run out
4
S10: Refrigeration stopped by main switch. Either with r12 or a DI-input
10
S11: Refrigeration stopped by thermostat
11
S14: Defrost sequence. Defrost in progress
14
S15: Defrost sequence. Fan delay — water attaches to the evaporator
15
S17: Door is open. DI input is open
17
S20: Emergency cooling *)
20
S25: Manual control of outputs
25
S29: Case cleaning
29
S30: Forced cooling
30
S32: Delay on outputs during start-up
32
Other displays:
non: The defrost temperature cannot be displayed. There is stop based on time
-d-: Defrost in progress / First cooling after defrost
PS: Password required. Set password
*) Emergency cooling will take effect when there is lack of signal from a defined S3 or S4 sensor. The regulation will continue with a registered average
cutin frequency. There are two registered values – one for day operation and one for night operation.
16
Manual RS8FL202 © Danfoss 08-2009
EKC 202D1
Operation
Display
The values will be shown with three digits, and with a setting you
can determine whether the temperature are to be shown in °C or
in °F.
Set temperature
1. Push the middle button until the temperature value is shown
2. Push the upper or the lower button and select the new value
3. Push the middle button again to conclude the setting.
Reading the temperature at defrost sensor
• Push short the lower button
Light-emitting diodes (LED) on front panel
The other LED’s on the front panel will light up when the belonging relay is activated.
Manuel start or stop of a defrost
• Push the lower button for four seconds. (Defrosting is only
started for the current controller. Any coordinated defrosting
sequence is not affected.)
= Refrigeration
= Defrost
= Fan running
The light-emitting diodes will flash when there is an alarm.
In this situation you can download the error code to the display
and cancel/sign for the alarm by giving the top knob a brief push.
Defrosting
A “-d-” is appears in the display during defrosting. This display will
appear for up to 15 minutes after cooling resumes.
However, the “-d-” display does not apply if:
- Temperature is reached within 15 minutes.
- Regulation is stopped via the “Main Switch”.
- A high temperature alarm is activated.
The buttons
When you want to change a setting, the upper and the lower
buttons will give you a higher or lower value depending on the
button you are pushing. 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 middle buttons until value for the parameter
is shown. When you have changed the value, save the new value
by once more pushing the middle button.
Examples
Get a good start
With the following procedure you can start regulation very quickly:
1 Open parameter r12 and stop the regulation (in a new and not
previously set unit, r12 will already be set to 0 which means
stopped regulation.)
2 Select electric connection based on the drawings on page 7
3 Open parameter o61 and set the electric connection number in
it
4 Now select one of the preset settings from the table on page 20.
5 Open parameter o62 and set the number for the array of presettings. The few selected settings will now be transferred to the
menu.
6 Regulation is now started (r12 was set to 1 in point 5)
Set menu
1. Push the upper button until a parameter r01 is shown
2. Push the upper or the lower button and find that parameter you
want to change
3. Push the middle button until the parameter value is shown
4. Push the upper or the lower button and select the new value
5. Push the middle button again to freeze the value.
7 Go through the survey of factory settings. The values in the grey
cells are changed according to your choice of pre-settings. Make
any necessary changes in the respective parameters.
8 For network. Set the address in o03 and then transmit it to the
gateway/system unit with setting o04.
Cutout alarm relay / receipt alarm/see alarm code
• Push short the upper button
If there are several alarm codes they are found in a rolling stack.
Push the uppermost or lowermost button to scan the rolling
stack.
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
17
Menu survey
SW = 1.4x
EL-diagram
number (page 7)
Codes 1
2
3
Parameters
Function
Normal operation
Temperature (set point)
Thermostat
Differential
Max. limitation of setpoint setting
Min. limitation of setpoint setting
Adjustment of temperature indication
Temperature unit (°C/°F)
Correction of the signal from S4
Correction of the signal from S3
Manual service, stop regulation, start regulation (-1, 0, 1)
Displacement of reference during night operation
Definition and weighting, if applicable, of thermostat sensors - S4% (100%=S4,
0%=S3)
Activation of reference displacement r40
Value of reference displacement (activate via r39 or DI)
Thermostat sensor S4% can be selected under night operation with night time
cover.
Temperature difference for night time cover (0 K = not detected)
Alarm
Delay for temperature alarm
Delay for door alarm
Delay for temperature alarm after defrost
High alarm limit
Low alarm limit
Alarm delay DI1
Alarm delay DI2
Definition of alarm sensor
1: Combination of S3 and S4 (A36, A13 and A14 must be set)
2: Separate values for S3 and S4 (A13, A14, A56 and A57 must be set)
Signal for alarm thermostat. S4% (100%=S4, 0%=S3)
High alarm limit for S3
Low alarm limit for S3
Compressor
Min. ON-time
Min. OFF-time
Compressor relay 1 must cutin and out inversely
(NC-function)
Defrost
Defrost method (none/EL/GAS/BRINE)
Defrost stop temperature
Interval between defrost starts
Max. defrost duration
Displacement of time on cutin of defrost at start-up
Drip off time
Delay for fan start after defrost
Fan start temperature
Fan cutin during defrost
Defrost sensor (0=time, 1=S5, 2=S4)
Pump down delay
Max. aggregate refrigeration time between two defrosts
Defrost on demand - S5 temperature’s permitted variation during frost build-up.
On central plant choose 20 K (=off )
Minimum defrost time
Fan
Fan stop at cutout compressor
Delay of fan stop
Fan stop temperature (S5)
Real time clock
Six start times for defrost.
Setting of hours.
0=OFF
Six start times for defrost.
Setting of minutes.
0=OFF
Clock - Setting of hours
Clock - Setting of minute
Clock - Setting of date
Clock - Setting of month
Clock - Setting of year
Miscellaneous
Delay of output signals after start-up
Input signal on DI1. Function:
0=not used. 1=status on DI1. 2=door function with alarm when open. 3=door
alarm when open. 4=defrost start (pulse-pressure). 5=ext.main switch. 6=night
operation 7=change reference (activate r40). 8=alarm function when closed.
9=alarm function when open. 10=case cleaning (pulse pressure). 11=forced
cooling
Network address
On/Off switch (Service Pin message)
IMPORTANT! o61 must be set prior to o04
Access code 1 (all settings)
18
***
***
***
***
***
***
***
***
***
***
***
Min.-value
Max.-value
Factory
setting
---
-50.0°C
50.0°C
2.0°C
r01
r02
r03
r04
r05
r09
r10
r12
r13
r15
0.0 K
-49.0°C
-50.0°C
-20.0 K
°C
-10.0 K
-10.0 K
-1
-10.0 K
0%
20.0K
50°C
49.0°C
20.0 K
°F
+10.0 K
+10.0 K
1
10.0 K
100%
2.0 K
50.0°C
-50.0°C
0.0 K
°C
0.0 K
0.0 K
0
0.0 K
100%
r39
r40
r61
OFF
-50.0 K
0%
ON
50.0 K
100%
OFF
0.0 K
100%
r75
0K
20 K
0K
A03
A04
A12
A13
A14
A27
A28
A33
0 min
0 min
0 min
-50.0°C
-50.0°C
0 min
0 min
1
240 min
240 min
240 min
50.0°C
50.0°C
240 min
240 min
2
30 min
60 min
90 min
8.0°C
-30.0°C
30 min
30 min
1
A36
A56
A57
0%
-50.0°C
-50.0°C
100%
50.0°C
50.0°C
100%
8.0°C
-30.0°C
c01
c02
c30
0 min
0 min
0
OFF
30 min
30 min
1
ON
0 min
0 min
0
OFF
d01
d02
d03
d04
d05
d06
d07
d08
d09
d10
d16
d18
d19
no
0.0°C
0 hours
0 min
0 min
0 min
0 min
-50.0°C
no
0
0 min
0 hours
0.0 K
bri
25.0°C
48 hours
180 min
240 min
60 min
60 min
0.0°C
yes
2
60 min
48 hours
20.0 k
EL
6.0°C
8 hours
45 min
0 min
0 min
0 min
-50.0°C
yes
0
0 min
0 hours
20.0 K
d24
0 min
180 min
0 min
F01
F02
F04
no
0 min
-50.0°C
yes
30 min
50.0°C
no
0 min
50.0°C
t01t06
0 hours
23 hours
0 hours
t11t16
0 min
59 min
0 min
t07
t08
t45
t46
t47
0 hours
0 min
1
1
0
23 hours
59 min
31
12
99
0 hours
0 min
1
1
0
o01
o02
0s
1
600 s
11
5s
0
o03
o04
0
OFF
240
ON
0
OFF
o05
0
100
0
Manual RS8FL202 © Danfoss 08-2009
Actual
setting
EKC 202D1
Used sensor type (Pt /PTC/NTC)
Display step = 0.5 (normal 0.1 at Pt sensor)
Max hold time after coordinated defrost
Select signal for display view. S4% (100%=S4, 0%=S3)
Input signal on DI2. Function:
(0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door
alarm when open. 4=defrost start (pulse-pressure). 5=ext. main switch 6=night
operation 7=change reference (activate r40). 8=alarm function when closed.
9=alarm function when open. 10=case cleaning (pulse pressure). 11=forced cooling . 12=coordinated defrost)
Configuration of light function (relay 4)
1=ON during day operation. 2=ON / OFF via data communication. 3=ON follows
the DI-function, when DI is selected to door function or to door alarm
Activation of light relay (only if o38=2)
Rail heat On time during day operations
Rail heat On time during night operations
Rail heat period time (On time + Off time)
Case cleaning. 0=no case cleaning. 1=Fans only. 2=All output Off.
Selection of EL diagram. See overview page 7
Transfer a set of pre-settings See overview page 20.
Access code 2 (partly access)
Save the controllers present settings to the programming key. Select your own
number.
Load a set of settings from the programming key (previously saved via o65 function)
Replace the controllers factory settings with the present settings
Service
Status codes
Temperature measured with S5 sensor
Status on DI1 input. on/1=closed
Temperature measured with S3 sensor
Status on night operation (on or off ) 1=closed
Temperature measured with S4 sensor
Thermostat temperature
Read the present regulation reference
Status on DI2 output. on/1=closed
Temperature shown on display
Measured temperature for alarm thermostat
Status on relay for cooling
Status on relay for fan
Status on relay for defrost
Status on relay for rail heat
Status on relay for alarm
Status on relay for light
Status of night time cover detection (On = night time cover has been detected)
***
*
*
***
*
o06
o15
o16
o17
o37
Pt
no
0 min
0%
0
ntc
yes
60 min
100%
12
Pt
no
20 min
100%
0
o38
1
3
1
o39
o41
o42
o43
o46
o61
o62
o64
o65
OFF
0%
0%
6 min
0
1
0
0
0
ON
100%
100%
60 min
2
3
10
100
25
OFF
100%
100%
10 min
0
1
0
0
0
o66
0
25
0
o67
OFF
On
OFF
1
2
3
S0-S33
u09
u10
*** u12
*** u13
*** u16
u17
u28
u37
u56
u57
**
u58
**
u59
**
u60
**
u61
**
u62
**
u63
U08
***
*) Can only be set when regulation is stopped (r12=0)
**) Can be controlled manually, but only when r12=-1
***) With access code 2 the access to these menues will be limited
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
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
19
Transfer a set of pre-settings. o62 =
Function / Code
Normal operation
Temperature (set point)
Thermostat
Differential
Max. limitation of setpoint setting
Min. limitation of setpoint setting
Manual service, stop regulation, start regulation (-1, 0, 1)
Reference displacement during night operation
Value of reference displacement
Selection of thermostat sensor S4% during night operation with night blinds
Temperature difference for night blinds
Alarm
Delay for temperature alarm
Delay for temperature alarm after defrost
High alarm limit
Low alarm limit
Definition of alarm sensor
Signal for alarm thermostat. S4% (100%=S4, 0%=S3)
High alarm limit for S3
Low alarm limit for S3
Compressor
Reversed relay function for Compressor relay 1
(NC-function)
Defrost
Defrost stop temperature
Interval between defrost starts
Max. defrost duration
Drip off time
Delay for fan start after defrost
Fan cutin during defrost
Defrost sensor
Miscellaneous
Delay of output signal after start-up
Used sensor type (Pt /PTC/NTC)
Display step = 0.5 (normal 0.1 at Pt sensor)
Max hold time after coordinated defrost
Select signal for display view. S4% (100%=S4, 0%=S3)
Input signal on DI2. Function:
Rail heat during day operation
Rail heat during night opeation
20
1
2
3
4
5
6
7
8
9
10
---
-8.0°C
-32.0°C
-30.0°C
-32.0°C
-28.0°C
-28.0°C
-2.0°C
-1.5°C
0.5°C
-2.0°C
r01
r02
r03
r12
r13
r40
r61
4.0 K
-5.0°C
-10.0°C
1
0
0
0
4.0 K
-28.0°C
-34.0°C
1
0
0
0
1.0 K
-28.0°C
-34.0°C
1
0
0
0
4.0 K
-28.0°C
-34.0°C
1
0
0
100%
1.0 K
-25.0°C
-50.0°C
1
0
6K
0
1.0 K
-25.0°C
-50.0°C
1
0
0
0
1.0 K
5.0°C
-10.0°C
1
0
0
0
1.0 K
6.0°C
-2.0°C
1
3K
-1.5 K
0
1.0 K
4.0°C
-1.0°C
1
3K
0.5 K
0
2.0 K
50.0°C
-50.0°C
0
0
0
100%
r75
0
0
0
0
0
0
0
3K
3K
0
A03
A12
A13
A14
A33
A36
A56
A57
30 min
60 min
13.0°C
-8.0°C
1
0
13.0°C
-8.0°C
30 min
60 min
-11.0°C
-32.0°C
1
0
-11.0°C
-32.0°C
30 min
60 min
-11.0°C
-32.0°C
1
0
-11.0°C
-32.0°C
30 min
60 min
-11.0°C
-35.0°C
1
100%
-11.0°C
-35.0°C
10 min
35 min
-15.0°C
-50.0°C
2
0
-16.0°C
-50.0°C
10 min
35 min
-15.0°C
-50.0°C
1
100%
-15.0°C
-50.0°C
30 min
60 min
10.0°C
-10.0°C
1
0
10.0°C
-10.0°C
10 min
45 min
2.0°C
-50.0°C
1
100%
50.0°C
-50.0°C
10 min
45 min
5.0°C
-50.0°C
1
100%
50.0°C
-50.0°C
30 min
90 min
8.0°C
-30.0°C
1
100%
8.0°C
-30.0°C
c30
0
0
0
0
0
0
0
1
1
0
7.0°C
6 hours
40 min
0 min
0 min
Yes
0
10.0°C
4 hours
35 min
0 min
0 min
Yes
S4
10.0°C
4 hours
35 min
0 min
0 min
Yes
S4
6.0°C
8 hours
45 min
0 min
0 min
Yes
0
5s
NTC
Yes
20 min
0
12
100%
100%
0
NTC
No
30 min
0
12
0
0
0
NTC
No
30 min
0
12
0
0
5s
Pt
No
20 min
100%
0
100%
100%
d02
d03
d04
d06
d07
d09
d10
o01
o06
o15
o16
o17
o37
o41
o42
5.0°C
5.0°C
5.0°C
5.0°C
5.0°C
15.0°C
12 hours 12 hours 48 hours 12 hours 24 hours 24 hours
45 min
45 min
45 min
45 min
60 min
45 min
0 min
2 min
2 min
2 min
10 min
10 min
0 min
3 min
0 min
3 min
5 min
5 min
Yes
No
Yes
No
No
No
0
0
0
0
0
0
5s
NTC
Yes
20 min
0
12
100%
100%
5s
NTC
Yes
20 min
0
12
100%
100%
5s
NTC
Yes
25 min
0
12
100%
100%
5s
NTC
Yes
25 min
100%
12
100%
100%
Manual RS8FL202 © Danfoss 08-2009
5s
NTC
Yes
15 min
0
12
100%
100%
5s
NTC
Yes
15 min
100%
12
100%
100%
EKC 202D1
Override
The controller contains a number of functions that can be used together with the override function in the master gateway / System
Manager.
Function via data communication
Functions to be used in the gateway’s
override function
Used parameter in EKC 202D1
Start of defrosting
Defrost control
Time schedule
- - - Def.start
Coordinated defrost
Defrost control
- - - HoldAfterDef
u60 Def.relay
Night setback
Day/night control
Time schedule
- - - Night setbck
Light control
Day/night control
Time schedule
o39 Light Remote
Ordering
Type
Function
EKC 202D1
Refrigeration controller without data
communication but prepared for mount- 230 V a.c.
ing of one module
EKA 178A
Voltage supply
Number
Code no.
1
084B8554
30
084B8654
Data communication module
MOD-bus
084B8564
EKA 179A
Data communication module
LON RS 485
084B8565
EKA 181A
Battery and buzzer module that will protect the clock in case of lengthy
power failure
084B8566
EKA 181C
Battery module that will protect the clock in case of lengthy power failure
084B8577
EKA 182A
Copy key EKC - EKC
084B8567
EKA 163A
External display
084B8562
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
21
Connections
Relays
The general uses are mentioned here. See also page 7 where the
different applications are shown.
DO1: Refrigeration. The relay will cut in when the controller demands refrigeration
DO2: Defrost. The relay will cut in when defrost is in progress
DO3: Fans
The relay will cut in when the fans have to operate
DO4: For either alarm, rail heat or light
Alarm: Cf. diagram. The relay is cut in during normal operation and cuts out in alarm situations and when the controller
is dead (de-energised)
Rail heat: The relay cuts in when rail heat is to operate
Light: The relay cuts in when the light has to be switched on
Power supply
230 V a.c.
Sensors
S3 and S4 are thermostat sensors.
A setting determines whether S3 or S4 or both of them are to be
used.
S5 is a defrost sensor and is used if defrost has to be stopped
based on temperature.
Digital On/Off signals
A cut-in input will activate a function. The possible functions are
described in menus o02 and o37.
External display
Connection of display type EKA 163A.
Data communication
The controller is available in several versions where data communication can be carried out with one of the following systems:
MOD-bus or LON-RS485.
If data communication is used, it is important that the installation
of the data communication cable is performed correctly.
See separate literature No. RC8AC…
The controller cannot be hooked up with a monitoring unit
type m2.
Electric noise
Cables for sensors, DI inputs and data communication must be
kept separate from other electric cables:
- Use separate cable trays
- Keep a distance between cables of at least 10 cm
- Long cables at the DI input should be avoided
Coordinated defrost via
cable connections
The following controllers can be connected
up in this way:
EKC 202D, EKC 202D1, AK-CC 210
(But max. 15 controllers)
Refrigeration is resumed when all
controllers have “released” the signal for
defrost.
Coordinated defrost via
data communication
22
Manual RS8FL202 © Danfoss 08-2009
EKC 202D1
Data
Supply voltage
230 V a.c. +10/-15 %. 2.5 VA, 50/60 Hz
Pt 1000 or
Sensors 3 pcs off
PTC (1000 ohm / 25°C) or
either
NTC-M2020 (5000 ohm / 25°C)
Measuring range -60 to +99°C
±1 K below -35°C
±0.5 K between -35 to +25°C
±1 K above +25°C
Controller
Accuracy
(The level of accuracy below -25°C
is more than doubled during the
use of NTC sensors)
±0.3 K at 0°C
Pt 1000 sensor
±0.005 K per grad
Display
LED, 3-digits
External display
Digital inputs
Electrical connection cable
EKA 163A
Signal from contact functions
Requirements to contacts: Gold plating
Cable length must be max. 15 m
Use auxiliary relays when the cable is longer
Max.1.5 mm2 multi-core cable
CE
(250 V a.c.)
Relays*
DO1.
Refrigeration
10 (6) A
DO2. Defrost
10 (6) A
DO3. Fan
6 (3) A
DO4. Alarm, light 4 (1) A
or rail heat
Min. 100 mA**
Environments
Density
0 to +55°C, During operations
-40 to +70°C, During transport
20 - 80% Rh, not condensed
No shock influence / vibrations
IP 65 from front.
Buttons and packing are imbedded in the front.
Escapement
reserve for the
clock
4 hours
Approvals
EU Low Voltage Directive and EMC demands re CEmarking complied with
LVD tested acc. EN 60730-1 og EN 60730-2-9, A1, A2
EMC tested acc. EN50082-1 og EN 60730-2-9, A2
* DO1 and DO2 are 16 A relays. DO3 and DO4 are 8 A relays. Max. load must be kept.
** Gold plating ensures make function with small contact loads
EKC 202D1
Manual RS8FL202 © Danfoss 08-2009
23
24
Manual RS8FL202 © Danfoss 08-2009
DE-BD
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
EKC 202D1
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