Johnson Controls MR12DR230-1C User manual

Electrical Control Cabinets
Including digital controller
Introduction
Designed to facilitate installers work, this range
of electrical cabinet is intended for use in cold
rooms working at positive or negative
temperatures and powered either with single
phase or three phase power supply.
Based on specifically designed controllers, it
incorporates all control functions as required by
modern cold room units, such as compressor
control, defrost management, fan management,
alarm function and solenoid valve for “pump
down”.
It also includes all the safety equipment needed
such as circuit breakers for the compressor and
for the controller.
Particular attention has been given to the
accessibility so that the installation time will be
reduced to a minimum. Space has been left
available for customisation.
12 modules (front) and 36 modules (back)
models
Features and Benefits
!Power rating from :
0,37 to 1,5 kW in single phase
1,5 to 7,5 kW in three phases
Cover most of standard applications.
!Standard DIN rail components Easy maintenance and servicing.
Availability of components.
!Most wiring integrated on the controller Increased quality and reduced space occupancy.
!Specifically designed controller to
manage Pump Down Better match application need.
!Accurate and interchangeable
IP 68 sensor Accurate control performance.
No re-calibration needed.
!IP 65 standard DIN polycarbonate cabinets High mechanical resistance.
Installation in harsh environment.
!Integrate circuit breaker for motor and
controller No time lost defining appropriate protection
!In field extension Possibility to field connect a condensing fan or a
door frame heater.
!Main Switch To power down the whole cabinet.
Increased safety protection.
Refrigeration Controls Catalogue
Catalogue Section 9
Product Bulletin CR1
Issue 0101
© 2000 Johnson Controls, Inc. Catalogue Section 9
Order No. P-CR-E

General features
Controller
Based on the field proven MR family of
controllers, it integrates specific features
required in cold rooms.
Positive temperature applications:
MR12DR230-1C
•Pump down management (selectable)
•Fan option
Negative temperature applications:
MR15DR230-2C
•Pump down management (selectable)
•Fan management
For additional information please refer to MR
documentation
Sensor
The CR series uses Johnson Controls A99
temperature sensor. Its accuracy, ± 0.5 K over a
range from -20ºC to 75ºC, and its gas tight
packaging makes it the best sensor for
refrigeration applications.
For details please refer to A99 documentation.
Circuit Breaker for motor
(Three phase models only)
Selected for its high protection against short
circuit, it features phase disconnection, thermal
protection and manual On/Off. The adjusted
protection value is independent of temperature
condition inside your cabinet.
For details on the short circuit protection, see
information page 13.
Circuit Breaker for controller, defrost
and fans
Specifically selected for virtually all applications it
features a high protection and an appropriate
magneto-thermal characteristic in function of the
application.
Positive temperature applications:
Mainly inductive loads: Curve D
Negative temperature applications:
Mainly resistive loads: Curve C
Negative temperature applications three
phase defrost only:
Mainly inductive loads: Curve D
Defrost Line: Curve C
For details, see information page 13.
Contactor
A VDR protection across the coil extends the life
of the controller relays. The contactor, being four
(4) poles, allows you to customise the cabinet to
your application. This additional contact could be
used to drive a condensing fan (up to 3 Amps) or
for signalling its operation.
Selected for use in AC-3 category: three-phase
motor with cage with a nominal speed of 1500
rpm.
Cabinet
Thanks to a specifically designed MR, there is
sufficient space in the cabinet in order to extend
your application.
Wiring is easily accessible.
The high protection level (IP65) allows you to
install this cabinet in harsh environment such as
outdoors. The polycarbonate material has a high
shock resistance, which could be necessary
during handling or at installation.
The class 2 insulation gives you the safety
required by all agencies.
2CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.

Dimensions (in mm)
90
220
A
B
140
54
110
DIN electrical cabinet
(12 or 18 modules)
240
A
B
140
42
122,5
370
125
DIN electrical cabinet
(24 or 36 modules)
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

52.5
2.07”
52.5
2.07”
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



70
2.76”
118
4.65”
45
1.78”
DIN Rail control enclosure
AB
12 modules 164 275
18 modules 269 380
24 modules 164 275
36 modules 269 380
50
1.97”
∅6
0.24” 2000
78.74”
A99B-9108 / A99BB-200C Sensor
Wiring Instruction
All wiring must be in accordance with local
regulations and national rules
These controllers are designed for use as an
operating control. When an operating control
failure would result in personal injury or loss of
property, it is the responsibility of the installer to
wire a separate backup control (e.g. a freeze
protection thermostat) in order not to use the
controller as an operating and safety device.
WARNING
When wiring and servicing make sure that:
•the electric supply to the actuator is
switched off to avoid possible damage to
the equipment, personal injury or shock.
•you do not touch or attempt to connect or
disconnect wires when electric power is on.
CR1 3
© 2010 Johnson Controls, Inc. Catalogue Section 9

Positive temperature cold room
Defrost functions
Defrost is initiated and terminated by a timer. The
user sets the interval between successive cycles and
its duration.
During the defrost cycle, the display can show
either the last measurement before this cycle or
the setpoint. You can also delay the normal
display function after the defrost cycle has
ended.
Manual defrost is possible by pushing a key on the
controller keypad.
Fan management functions
You can choose whether the fan is to be run in
parallel with the compressor or whether it should
remain constantly ON. In this case the fan will be
ON during defrost. This will decrease defrosting
duration.
Pump down selection
A selector is available to choose between the start
stop strategy for the compressor.
Condensing fan
On the 3-phase models, two terminals are
available to field connect a condensing fan.
Digital input functions
All defrost controllers are equipped with a digital
input performing the following functions:
•Shut-OFF: If the contact is open for a preset
time, all outputs are de-energised and an
alarm message is displayed.
•External alarm: Display shows AL, the Alarm
output is switched ON, all other functions will
perform as normal
•Door open: In this case the High alarm will
be disabled, other functions will perform as
normal.
Note:
A detailed list of available parameters and their
description can be found at the end of this
documentation.
Positive Temperature Cold Room Cabinet
Selection table:
Item code Power supply Compressor Evap. Fan Cond.
Fan Cabinet size Shipping
weight
V ac Φ
ΦΦ
ΦPower
AC-3 Amps Amps Amps modules Kg
CR-PS037-1 230 1 0,37 kW 5 1,6 - 12 2,2
CR-PS075-1 230 1 0,75 kW 8 1,6 - 12 2,2
CR-PS110-1 230 1 1,1 kW 10 3,2 - 12 2,2
CR-PS150-1 230 1 1,5 kW 12 4,8 - 12 2,2
CR-PT150-1 400 3 1,5 kW 3,5 3,2 3 18 3,2
CR-PT250-1 400 3 2,5 kW 5,7 3,2 3 18 3,2
CR-PT400-1 400 3 4,0 kW 8,5 4,8 3 18 3,2
CR-PT550-1 400 3 5,5 kW 11,5 4,8 3 18 3,2
CR-PT750-1 400 3 7,5 kW 15,5 4,8 3 18 3,2
Fan and
compressor
switched in parallel Continuous
fan
Solenoid valve and
compressor
switched in parallel Pump down
4CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.

Wiring diagram
Positive temperature cold room single phase model
Valve
Pump
down
reaker
1P+N
Circuit
B
Circuit
~ 400 V
Breaker
3
Contactor
Fan
230 Volts
Contact
pump
down
A99
1L1 3L2 5L3
2T1 4T2 6T3
I> I> I>
A1 1L1 3L2 5L3
2T1 4T2 6T3A2
Compressor
3 ~ 400 Volts
MR12DR230
B1 ADA
N13 7 4NNNN4’
13N
24N
Alarm
230V~
0,5 A
8T4
7L4
21 22
3’
Fan
Compressor
Compressor
K1
CB1
Ambient Sensor
23
Cond. Fan /
Door frame
24
Positive temperature cold room three phase model
CR1 5
© 2010 Johnson Controls, Inc. Catalogue Section 9

Negative temperature cold room
This control is equipped with two sensors, one for the
control of the refrigeration unit, the other senses the
evaporator temperature.
Defrost functions
Defrost cycle is initiated by a timer and
terminated either by temperature or time,
whichever comes first.
The defrost function includes the following
parameters:
•Type of defrosts (Hot gas or electrical heating).
•Interval time to adjust defrost frequency.
•Type of defrosts termination: time or temperature.
•Defrost end temperature.
•Maximum defrosts duration.
You can stop the compressor for an additional
configurable period called dripping time. This will
allow the evaporator to dry prior to resuming normal
operation.
In case of evaporator sensor failure, defrosts
cycle will be terminated by the maximum defrost
duration.
During defrost the display can be configured to show the
last measurement before defrost or the setpoint.
Fan management functions
Through the controller, you can choose whether
the fan is to be run in parallel to the compressor
or constantly ON. In any case the fan is switched
OFF during defrost.
After defrost, the fan can resume its work after a
preset time or after the evaporator temperature
has dropped below a user-settable temperature.
Condensing fan or door frame heater
On the 3-phase models, two terminals are
available to field connect a condensing fan or a
door frame heater to avoid the cell door sticking.
Digital input functions
All defrost controllers are equipped with an
additional digital input which can be configured to
perform the following functions:
•“Shut-OFF” function.
•External alarm function.
•“Door open” function.
Pump down selection
A selector is available to choose between the
start stop strategy for the compressor
Note:
A detailed list of available parameters and their
description can be found at the end of this
documentation.
Negative Temperature Cold Room Cabinet
Selection table:
Item code Power
supply Compressor Evap. Fan Cond. Fan/ Door frame
heater
Defrost Cabinet
Size Shipping weight
V ac Φ
ΦΦ
ΦPower
AC-3 Amps Amps Amps Amps modules Kg
CR-NS037-1 230 1 0,37 kW 5 1,6 - 8 12 2,5
CR-NS075-1 230 1 0,75 kW 8 1,6 - 12 12 2,5
CR-NS110-1 230 1 1,1 kW 10 3,2 - 12 12 2,5
CR-NS150-1 230 1 1,5 kW 12 4,8 - 16 12 2,5
CR-NT150-1 400 3 1,5 kW 3,5 3,2 3 12 18 3,5
CR-NT250-1 400 3 2,5 kW 5,7 3,2 3 12 18 3,5
CR-NT400-1 400 3 4,0 kW 8,5 4,8 3 15 18 3,5
CR-NT550-1 400 3 5,5 kW 11,5 4,8 3 15 18 3,5
CR-NT750-1 400 3 7,5 kW 15,5 4,8 3 15 18 3,5
Solenoid valve and
compressor
switched in parallel Pump down
6CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.

Wiring diagram
Negative temperature cold room single phase models
Valve
Pump
down
Defrost
230 V ~
reaker
1P+N
Circuit
B
Circuit
~ 400 V
Breaker
3
Contactor
Fan
230 Volts
A99
Contact
pump
down
A99
1L1 3L2 5L3
2T1 4T2 6T3
I> I> I>
A1 1L1 3L2 5L3
2T1 4T2 6T3A2
Compressor
3 ~ 400 Volts
MR15DR230
1011B1 ADAB2 A
N13 7 4NNNN4’
13N
24N
Alarm
230V~
0,5 A
8T4
7L4
21 22
N20
3’
Compressor
Compressor
K1
CB1
23
Cond. Fan /
Door frame
24
Ambient Sensor Evaporator Sensor
Negative temperature cold room three phase models
CR1 7
© 2010 Johnson Controls, Inc. Catalogue Section 9

Negative temperature cold room with three phase defrost
Selection table:
Item code Power
supply Compressor Evap.
Fan Cond. Fan /
Door frame
heater
Defrost Cabinet
Size Shipping weight
V ac Φ
ΦΦ
ΦPower
AC-3 Amps Amps Amps Amps modules Kg
CR-NDT150-1 400 3 1,5 kW 3,5 3,2 4 3 x 5 24 4,1
CR-NDT250-1 400 3 2,5 kW 5,7 3,2 4 3 x 9 24 4,1
CR-NDT400-1 400 3 4,0 kW 8,5 4,8 6 3 x 10 24 4,1
CR-NDT550-1 400 3 5,5 kW 11,5 4,8 6 3 x 12 24 4,1
CR-NDT750-1 400 3 7,5 kW 15,5 4,8 6 3 x 16 24 4,1
Wiring diagram:
Valve
Pump
down
Defrost
230 V 3~
reaker
1P+N
Circuit
B
Circuit
~ 400 V
Breaker
3
Contactor
Fan
230 Volts
A99
Contact
pump
down
A99
1L1 3L2 5L3
2T1 4T2 6T3
I> I> I>
A1 1L1 3L2 5L3
2T1 4T2 6T3A2
Compressor
3 ~ 400 Volts
MR15DR230
1011
B1 ADAB2 A
N13 74NNNN4’
13N
24N
Alarm
230V~
0,5 A
8T4
7L4
21
2121
21 22
2222
22
3’
1/ 2 3/ 4 5/6
2/1 4/3 6/5
1L1 3L2 5L3
2T1 4T2 6T3 8T4
7L4
A1
A2
Circuit
Breaker
4P
7/8
7/8
Compressor
Contactor
Defrost
Defrost
Compressor
K1
CB1
K2
Ambient Sensor Evaporator Sensor
23
Cond. Fan /
Door frame
24
Negative temperature cold room three phase Compressor and three phase Defrost models
8CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.

Negative temperature cold room with three phase defrost and evaporator fan
Selection table:
Item code Power
supply Compressor Evap. Fan Cond. Fan / Door frame
heater
Defrost Cabinet
Size Shipping weight
V ac Φ
ΦΦ
ΦPower
AC-3 Amps Amps Amps modules Kg
CR-NFDT150-1 400 3 1,5 kW 3,5 3 x 2 5 3 x 5 36 5,3
CR-NFDT400-1 400 3 4,0 kW 8,5 3 x 2 5 3 x 10 36 5,3
CR-NFDT750-1 400 3 7,5 kW 15,5 3 x 2 5 3 x 16 36 5,3
Wiring diagram
Valve
Pump
down
Defrost
230 V 3~
Fuses
reaker
Circuit
B
Circuit
~ 400 V
Breaker
3
Contactor
A99
Contact
pump
down
A99
1L1 3L2 5L3
2T1 4T2 6T3
I> I> I>
A1 1L1 3L2 5L3
2T1 4T2 6T3A2
Compressor
3 ~ 400 Volts
MR15DR230
1011
B1 ADAB2 A
N13 7 4NNNN4’
Alarm
230V~
0,5 A
8T4
7L4
21 22
Pressure
switch
HPBP
3’
1L1 3L2 5L3
2T1 4T2 6T3 8T4
7L4A1
A2
Circuit
Breaker
Compressor
Contactor
Defrost
Defrost
Compressor
K1
CB1
K2
Ambient Sensor Evaporator Sensor
23
Cond. Fan /
Door frame
24
F1
Fuses
Main
Switch
WIRING DIAGRAM FOR:
CR-NFDT150-1 / CR-NFDT400-1 / CR-NFDT750-1
Circuit
~ 400 V
Breaker
3
Contactor
1L1 3L2 5L3
2T1 4T2 6T3
I> I> I>
A1 1L1 3L2 5L3
2T1 4T2 6T3A2
Fan
8T4
7L4
Fan
Fan
K3
Q1
3 ~ 400 Volts
1L1
3L2
5L3
7L4
Negative temperature cold room- three phase Compressor, Defrost and Evaporator Fan
CR1 9
© 2010 Johnson Controls, Inc. Catalogue Section 9

Description of each parameter
Setpoint :
is defined as the relay cut OFF.
Hy Hysteresis
This is the difference between the temperature
at which the compressor output is switched OFF
and the temperature at which the output is
switched ON. This is an absolute value, related
to the setpoint.
Example:
Cooling Setpoint = 4 ºC
Differential = 2 K.
The compressor is switched
ON when the temperature
goes over 6 ºC, and is turned
OFF when the temperature
decreases to 4 ºC.
LL/HL Lower & Higher setpoint limit
The setpoint value cannot be adjusted outside
the limits defined by these parameters, to avoid
improper setpoint setting by the user.
CC Anti short cycle protection
This parameter prevents the compressor from
being turned ON / OFF too often. The value that
you set is the minimum time between two
subsequent switches ON of the output.
Cooling demand
Comp. output
Anti cycle timer
Co Deep freezing time
This is the time for which the compressor is
forced ON when pressing the deep freezing
cycle key from the faceplate.
AH High temperature alarm:
High temperature alarm value relative to
setpoint. If your set point is at 4ºC and you want
an alarm 5 K above setpoint, it will be triggered
at 9ºC.
AL Low temperature alarm:
Low temperature alarm value relative to setpoint.
If your set point is at 4ºC and you want an alarm
3 K below setpoint, it will be triggered at 1ºC.
Ad Alarm differential:
Useful to avoid alarm oscillations.
For example:
Setpoint = 4ºC,
Max. Temperature alarm = 6 K,
Alarm differential = 2 K.
In this case, when the cold room temperature
exceeds 4+6 = 10ºC for a time greater than
parameter At the alarm is activated; when
temperature drops below 4+6-2 = 8ºC the alarm
is reset
At Alarm time delay:
Delay between the detection of the temperature
alarm and the activation of the alarm sequences.
This is useful to prevent temporary conditions
from causing an alarm. Furthermore, the
controller automatically ignores the temperature
alarm condition in the following cases:
- for 20 minutes after the power-ON
-during defrost and for 20 minutes after the
defrost-end.
dF Defrost function:
Select the type of your installation and the way
defrost is performed
0 = Electrical defrost (Compressor OFF)
1 = Hot gas defrost (Compressor ON)
dE Defrost end function:
Select the defrost termination type:
0 = timer based, set with parameter dd
In this case the evaporator sensor is not
required and the fan will restart base on time.
1 = temperature based, set with parameter dt
Note: in any case defrost ends after the time set
on parameter dd.
dt Defrost termination temperature:
Used only when parameter dE =1. When the
evaporator temperature reaches this value,
defrost automatically ends.
di Defrost interval time:
This is the time between two subsequent defrost
cycles. This timer will initiate every defrost cycle.
dd Maximum defrost duration:
If defrost end by time has been selected
(parameter dE=1) defrost cycle will stop after this
time, even if the end temperature has not
reached parameter dt.
When defrost interval time is 1 hour, the
maximum duration is limited to 40 min.
dC Dripping time:
After defrost is terminated, the compressor is
stopped to allow the evaporator to drip.
Hysteresis
Cooling Setpoint T°C
10 CR1
Catalogue Section 9 © 2000 Johnson Controls, Inc.