Pego 200NDIN3RK Operating instructions

Rel. Software: 6
REV. 01/04
User and maintenance manual
ENGLISH
ELECTRICAL BOARDS FOR REFRIGERATING INSTALLATIONS
READ AND KEEP
REV. 01-16
EN
200

DIN NANO 3RK Chapter 1 - Introduction
Rev. 01-16
Page 2
INTRODUCTION
Page 3 1.1 General
Page 3 1.2 Product identification codes
Page 4 1.3 Overall dimensions
Page 4 1.4 Identification data
INSTALLATION
Page 5 2.1 General rules for the installer
Page 5 2.2 Standard equipment for assembly and use
Page 6 2.3 Installation of the board
TECHNICAL FEATURES
Page 7 3.1 Technical features
TERMS OF THE GUARANTEE
Page 8 4.1 Terms of the guarantee
DATA PROGRAMMING
Page 9 5.1 Control panel
Page 9 5.2 Front keypad
Page 10 5.3 LED display
Page 11 5.4 Combination of keys
Page 12 5.5 Setting and viewing the set point
Page 12 5.6 Level 1 programming
Page 12 5.7 List of Level 1 variables
Page 14 5.8 Level 2 programming
Page 14 5.9 List of Level 2 variables
Page 18 5.10 Level 3 programming
Page 18 5.11 List of Level 3 variables
Page 19 5.12 Sequence and activation delays
Page 20 5.13 Operation mode
Page 25 5.14 Password function
OPTIONS
Page 26 6.1 TeleNET monitoring/supervision system
Page 26 6.2 Network configuration with Modbus-RTU protocol
DIAGNOSTICS
Page 27 7.1 Diagnostics
ANNEXES
Page 29 A.1 CE Declaration of Conformity
Page 30 A.2 Connection diagram
REV. 01/04
CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTER 5
CHAPTER 6
CHAPTER 7
CONTENTS

Chapter 1 - Introduction DIN NANO 3RK
Page 3
Rev. 01-16
GENERAL INFORMATION
DESCRIPTION
The DIN NANO 3RK is a 4 relay electronic regulator on DIN bar for the management of the
cooling control unit which allows up to a maximum of three compressors to be controlled or
up to three fans of the condensing unit, based on the measured pressure
APPLICATIONS:
-Controlling the compressors of the cooling control unit.
-Controlling the condensing fans of the cooling control unit.
MAIN FEATURES:
-It can be configured to control the compressors (up to a max. of 3) or condenser fans
(up to a max. of 3).
-0-10V analogue output for the speed adjustment as an alternative to digital outputs to
control the condenser fans or the compressors.
-View of the pressure transducer reading in Bar or in °C (depending on the type of
selected refrigerant gas).
-Compressor/fan rotation depending on the operation timing.
-Management of the compressors that have different or equal power.
-Management of the number of outputs used.
-Adjustment in sideband.
-3-digit LED display with sign, decimal point and system status icons.
-RS485 serial connection with Modbus-RTU or Telenet protocol.
-PEGO programming criteria that guarantees immediate start-up.
-Supply voltage 230Vac.
PRODUCT IDENTIFICATION CODES
200NDIN3RK01 4 relay electronic regulator on DIN bar to manage the
cooling control unit which allows up to a maximum of
three compressors to be controlled or up to three
fans of the condensing unit, based on the measured
pressure.
CHAPTER 1: INTRODUCTION
1.1
1.2

DIN NANO 3RK Chapter 1 - Introduction
Rev. 01-16
Page 4
OVERALL DIMENSIONS
Dimensions in mm.
IDENTIFICATION DATA
The device described in this manual has a plate on one side bearing the identification
data:
• Name of Manufacturer
• Code and model of the electrical board
of the device
• Serial number
• Date of manufacture
1.3
1.4
DIN NANO 3RK
200NDIN3RK01

Chapter 2 –Installation DIN NANO 3RK
Page 5
Rev. 01-16
GENERAL RULES FOR THE INSTALLER
1. Install the device in an area that ensures the correct degree of protection, and take all due care when
drilling holes in the box for the cable glands and/or hoses;
2. Avoid using multi-pole cables with conductors connected to inductive and power conductors and signal
conductors like probes and digital inputs;
3. Avoid inserting ducts and power cables with signal cables (sensors and digital inputs) in these;
4. Minimize the length of the connecting cables to prevent these from coiling up and adversely affecting the
electronics through induction;
5. All the conductors of the cables must be of an appropriate size to withstand the required load;
6. When extensions are needed for the sensors, it is necessary to use conductors of a suitable size
measuring no less than 1 mm². Extension or shortening of the probes may alter the factory settings; use
an external thermometer, therefore, for testing and calibration.
STANDARD EQUIPMENT FOR ASSEMBLY AND USE
The DIN NANO 3RK electronic controller is provided with the following for assembly and use:
• 1 x user manual.
2.1
2.2
CHAPTER 2: INSTALLATION

DIN NANO 3RK Chapter 2 - Installation
Rev. 01-16
Page 6

INSTALLATION OF BOARD
Fig. 1: Install the module on the DIN
guide and close the bottom clamp to
hold it in place.
Make all the electrical connections with reference to the diagrams of the relative
model (see the relative tables in the ANNEXES). During the cabling process, it is
advisable to keep the power conductors isolated from the signal conductors.
2.3

Chapter 3 –Technical features DIN NANO 3RK
Page 7
Rev. 01-16
TECHNICAL FEATURES
Power supply
Voltage
230 V~ 10% 50Hz / 60Hz
Max power consumption (electronic controller only)
~ 5 VA
Climatic conditions
Operating temperature
-5 ÷ +50°C
Storage temperature
-10 ÷ +70°C
Relative ambient humidity
Less than 90% RH
General features
Compatible type of pressure sensor:
pressure sensor: 4/20mA
Output features
Description
Relay installed
Features of output board
Notes
Compressor/Fan 1
(Relay 16A AC1)
16(6)A 250V~
Compressor/Fan 2
(Relay 16A AC1)
16(6)A 250V~
Compressor/Fan 3
(8A AC1 relay)
8(3)A 250V~
Alarm (voltage-free
contact)
(8A AC1 relay)
8(3)A 250V~
Dimensional features
Dimensions
12.15cm x 7.1cm x 10.5cm (HxWxL)
Insulation and mechanical properties
Degree of protection of front console (remote-
controlled by the power section if assembled on
front of board)
IP65
Material of boxes
PC+ABS self-extinguishing UL94 V-0
Type of insulation
Class II
CHAPTER 3: TECHNICAL FEATURES
3.1

DIN NANO 3RK Chapter 4 –Terms of guarantee
Rev. 01-16
Page 8
TERMS OF THE GUARANTEE
The NANO DIN electronic controls are guaranteed against all manufacturing defects for 24 months from the
date in the production identification code.
In the event of defects, the device must be returned properly packaged to our Site or authorised assistance
centre after requesting and receiving the authorisation number for returning the product.
The Customer has the right to repair the defective device inclusive of manual labour and spare parts. The
Customer assumes sole responsibility for the expenses and the risks associated with transport.
All work carried out under the terms of the guarantee does not renew or extend the duration of the
guarantee.
The guarantee does not cover:
Damage attributable to tampering, negligence, carelessness or inadequate installation of the device.
Installation, use or maintenance not in compliance with the rules and instructions provided with the
device.
Repairs carried out by unauthorised personnel.
Damage attributable to natural causes like lightning, natural disasters, etc.
In all the above cases, the customer pays for the cost of repair.
Request for repairs under the terms of the guarantee may be refused if the device has been modified or
converted.
PEGO S.r.l. cannot assume responsibility for any loss of data or information, the cost of replacement goods
or services, injury to people or animals, loss of sales or earnings, downtime, and any direct, indirect,
accidental, pecuniary, collateral, punitive, special or consequential damage or loss caused in any way, within
or outside the scope of the contract or due to negligence or other responsibilities associated with use or
installation of the product.
The guarantee is terminated automatically in the event of poor operation attributable to tampering, collisions
and inadequate installation. It is obligatory to observe all the rules in this manual and the operating
conditions of the device.
PEGO S.r.l. cannot assume any responsibility for inaccuracies in this manual attributable to printing or
transcription errors.
PEGO S.r.l. reserves the right to make changes to its products that it considers necessary or useful without
affecting their essential characteristics.
Each new release of the manuals for PEGO's products replaces all previous releases.
Unless specified otherwise, the guarantee is governed by the rules in force and, in particular, article 1512 of
the Italian Civil Code.
All disputes are settled at the Court of Rovigo.
4.1
CHAPTER 4: TERMS OF THE GUARANTEE

Chapter 5 –Data programming DIN NANO 3RK
Page 9
Rev. 01-16
CONTROL PANEL
FRONT KEYPAD
(1)
UP KEY
Increases value / Scrolls up through parameters
Acquires an alarm.
If pressed for more than 5 sec. while viewing the value contained in the Hr1, Hr2 and Hr3
variables (Hour counter of the digital outputs), the information will be reset.
(2)
DOWN KEY
Decreases value / Scrolls down through parameters.
(3)
STAND-BY
If pressed for more than 1 sec., the Stand-by state will alternate with the normal operating
status, and vice versa. In the stand-by state, the system stops and the display will change
the writing OFF with the current view.
If pressed, it switches the display view from °C to Bar and vice versa.
(4)
SET
Shows the set point
Enables configuration of the set point when pressed together with the Down or UP key.
CHAPTER 5: DATA PROGRAMMING
5.1
5.2
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(10)
(14)
(8)
(11)
(9)
(12)
(13)

DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 10
LED DISPLAY
(5)
Shows the values / parameters
(6)
"OUTPUT NO.1” ICON
LED ON = Digital output No.1 ON
If the control is set with 0-10V analogue output (mOd=2 or mOd=3): ON=analogue output between
0.1 and 3.3V.
Flashing Led = (Only for compressor performance) Digital Output no. 1 pending the delays for the
passage from on/off or off/on.
(7)
"OUTPUT NO.2" ICON
LED ON = Digital output No.2 ON
If the control is set with 0-10V analogue output (mOd=2 or mOd=3): ON=analogue output between
3.4 and 6.6V.
Flashing LED = (Only for compressor performance) Digital Output no. 2 pending the delays for the
passage from on/off or off/on.
(8)
"OUTPUT NO.3" ICON
LED ON = Digital output No.3 ON
If the control is set with 0-10V analogue output (mOd=2 or mOd=3): ON = analogue output > 6.6V.
Flashing LED = (Only for compressor performance) Digital Output no. 3 pending the delays for the
passage from on/off or off/on.
(9)
"PRG" ICON
Flashing LED = Programming (or SET POINT change)
(10)
"COMPRESSOR CONTROL" ICON
LED ON = Compressor control ENABLED (mOd=0 or mOd=3)
(11)
"CONDENSER FAN CONTROL" ICON
LED ON = Condenser Fan Control ENABLED (mOd=1 or mOd=2)
(12)
"UNIT OF MEASURE IN DEGREES CELSIUS" ICON
LED ON = Unit of measure in degrees Celsius of the viewed value.
(13)
"UNIT OF MEASUREMENT IN BAR" ICON
LED ON = Unit of measure in Bar of the viewed value.
(14)
ALARM IN PROGRESS ICON
LED OFF = No alarm triggered
LED ON = Alarm triggered and then cancelled
Blinking LED = Alarm in progress
5.3

Chapter 5 –Data programming DIN NANO 3RK
Page 11
Rev. 01-16
COMBINATION OF KEYS
+
LEVEL 1 PROGRAMMING
Pressing both keys together for more than 3 seconds
enables access to the Level 1 programming menu.
EXIT PROGRAMMING
Pressing both keys together for more than 3 seconds in
any programming menu exits the menu concerned.
+ +
LEVEL 2 PROGRAMMING
Pressing all keys together for more than 3 seconds
enables access to the Level 2 programming menu.
To exit the menu, press the up and down arrow keys
together.
+
LEVEL 3 PROGRAMMING
Pressing both keys together for more than 3 seconds
enables access to the Level 3 programming menu.
To exit the menu, press the up and down arrow keys
together.
pressed
+
SWITCHING FROM Bar to °C WHILE
VIEWING THE VALUE OF THE FOLLOWING
VARIABLES IN Bar (therefore, with SET
pressed).
The variables involved with this kind of view are:
SET POINT, r0, LSE, HSE.
When displaying the value contained in one of the variables
listed above, pressing the stand-by key switches the view from
Bar to °C according to the table of the gas type selected until
the keys are released.
+
OUTPUT HOUR COUNTER RESET
While viewing the working time of an output within the read-only
Hr1, Hr2 or Hr3 parameters while pressing the SET key and
pressing the "Up arrow" for at least 5 sec., the hour counter will
be reset.
5.4

DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 12
VIEWING AND CONFIGURATION OF SET POINT
1. Press the SET key to view the current Bar SET POINT value.
2. Pressing and holding the SET key and pressing one of the keys () or () alters the value of the Bar
SETPOINT.
Release the SET key to return to the value of the adjustment sensor. Any changes made are saved
automatically.
While viewing the SET POINT value in Bar (SET button pressed), if you press the standby key at the same
time, you will view the value changed to °C depending on the type of Gas set.
While viewing the value in °C, it will not be possible to change the set through the arrows.
LEVEL 1 PROGRAMMING (User level)
To access Level 2 programming, press and hold the UP key () and DOWN key () for over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu. The system closes the menu when the keypad is
not used for over 30 seconds.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 1 VARIABLES (User Level)
LABEL
MEANING
VALUES
DEFAULT
default
mOd
r0
SET differential (of the pressure)
(interlocked with iOV but only if
mOd=2)
with mOd=0
(comp. control)
0.2 30 bar
(with mOd=0 or 3)
0.6
*
with mOd=1 or 2
(fan control)
0.6 5 bar
(with mOd=1 or 2)
2
t1
The minimum time that must elapse
between the insertion of a
compressor step and the next one
(SECONDS)
This time avoids breakaways caused
by simultaneous start-ups.
0 500
step 2 sec
(with mOd=0 or 3)
20
*
(with mOd=1 or 2)
2
t2
The minimum time that must elapse
between two different compressor
step deactivations. (SECONDS)
0 500
step 2 sec
(with mOd=0 or 3)
10
*
(with mOd=1 or 2)
2
5.6
5.7
5.5

Chapter 5 –Data programming DIN NANO 3RK
Page 13
Rev. 01-16
t3
The minimum time that must elapse
between two successive insertions
of the same compressor step.
(SECONDS)
0 500
step 2 sec
(with mOd=0 or 3)
320
*
(with mOd=1 or 2)
10
t4
The minimum time that must elapse
between one shutdown and the next
insertion of the same compressor
step. (SECONDS)
0 500
step 2 sec
0
Fty
Type of refrigerant GAS in use.
The setting of this parameter is
essential for correct operation.
0 = 404 4 = 410
1 = 134 5 = 507
2 = R22 6 = CO2
3 = 407
1
UM
View unit of measurement
0 = bar
1 = °C
0
Hr1
Digital output 1 hour counter
(resettable)**
0 999
tens of hours
read-only
Hr2
Digital output 2 hour counter
(resettable)**
0 999
tens of hours
read-only
Hr3
Digital output 3 hour counter
(resettable)**
0 999
tens of hours
read-only
AO1
Display of the 0-10V analogue output
for condenser fans
0.0 –10.0V
(with mOd = 0 or
1 will be
displayed - - -)
read-only
ALL
View of the last alarm triggered
alarm code
read-only
A1
Minimum pressure alarm
The absolute pressure referring to the
ambient probe below which, once the Ald
delay time is activated, the LOW pressure
alarm is triggered showing EL alternating
with the pressure on the display and the
flashing of the alarm icon.
When the alarm turns off, the "alarm
presence" icon will remain lit to indicate
which operation has occurred until the UP
button is pressed.
(This parameter has meaning only if
mOd=0.)
-0.6 ÷ (A2-02)
Bar, step 0.2 Bar
-0.6 Bar
A2
Maximum pressure alarm
The absolute temperature referring to the
ambient probe above which, once the Ald
delay time is activated, the HIGH pressure
alarm is triggered showing EH alternating
with the pressure on the display and the
flashing of the alarm icon.
When the alarm turns off, the "alarm
presence" icon will remain lit to indicate
which operation has occurred until the UP
button is pressed.
(This parameter has meaning only if
mOd=0.)
(A1+0.2) ÷ +30.0
Bar, step 0.2 Bar
+30.0 Bar
Note (**):
Resetting the output working time is carried out by viewing the content of the desired hour meter (Hr1, Hr2,
etc.) using the SET key and pressing the "Up arrow" of acquisition for at least 5 sec.

DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 14
LEVEL 2 PROGRAMMING (Installer level)
To access Level 2 programming, press and hold the UP key (), DOWN key () and STAND-BY key for
over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 2 VARIABLES (Installer Level)
LABEL
MEANING
VALUES
DEFAULT
default
mOd
NO
Digital outputs number
selection to control.
1…3
3
Seq.
Logical selection of the
digital outputs
activation
0 = With rotation
1 = Without rotation
1
Man
Max. number (hours x
10) of operating hours
for a compressor after
which, a request for
maintenance will be
signalled (if = 0, the
request for
maintenance will not be
signalled)
0…510
step 2
0
In1
Settings of no.1 Digital
input
8 = General low pressure alarm (with DI=1)
7 = General high pressure alarm (with DI=1)
6 = Freon level alarm (with DI=1)
5 = Central alarm in manual mode (with DI=1)
4 = Read-only Alarm (with DI=1)
3 = Output No.3 Alarm (with DI=1)
2 = Output No.2 Alarm (with DI=1)
1 = Output No.1 Alarm (with DI=1)
0 =Disabled
-1 =Output No.1 Alarm (with DI=0)
-2 =Output No.2 Alarm (with DI=0)
-3 =Output No.3 Alarm (with DI=0)
-4 =Read-only Alarm (with DI=0)
-5 =Central alarm in manual mode (with DI=0)
-6 =Freon level alarm (with DI=0)
-7 = General high pressure alarm (with DI=0)
-8 = General low pressure alarm (with DI=0)
1
5.8
5.9

Chapter 5 –Data programming DIN NANO 3RK
Page 15
Rev. 01-16
In2
Settings of no.2 Digital
input
8 = General low pressure alarm (with DI=1)
7 = General high pressure alarm (with DI=1)
6 = Freon level alarm (with DI=1)
5 = Central alarm in manual mode (with DI=1)
4 = Read-only Alarm (with DI=1)
3 = Output No.3 Alarm (with DI=1)
2 = Output No.2 Alarm (with DI=1)
1 = Output No.1 Alarm (with DI=1)
0 = Disabled
-1 =Output No.1 Alarm (with DI=0)
-2 =Output No.2 Alarm (with DI=0)
-3 =Output No.3 Alarm (with DI=0)
-4 =Read-only Alarm (with DI=0)
-5 =Central alarm in manual mode (with DI=0)
-6 =Freon level alarm (with DI=0)
-7 = General high pressure alarm (with DI=0)
-8 = General low pressure alarm (with DI=0)
2
In3
Settings of no.3 Digital
input
8 = General low pressure alarm (with DI=1)
7 = General high pressure alarm (with DI=1)
6 = Freon level alarm (with DI=1)
5 = Central alarm in manual mode (with DI=1)
4 = Read-only Alarm (with DI=1)
3 = Output No.3 Alarm (with DI=1)
2 = Output No.2 Alarm (with DI=1)
1 = Output No.1 Alarm (with DI=1)
0 =Disabled
-1 =Output No.1 Alarm (with DI=0)
-2 =Output No.2 Alarm (with DI=0)
-3 =Output No.3 Alarm (with DI=0)
-4 =Read-only Alarm (with DI=0)
-5 =Central alarm in manual mode (with DI=0)
-6 =Freon level alarm (with DI=0)
-7 = General high pressure alarm (with DI=0)
-8 = General low pressure alarm (with DI=0)
3
DO5
General alarm output
settings
1 = DO5 relay enabled in presence of
alarm
0 = DO5 relay disabled
-1 = DO5 relay disabled in presence
of alarm
1
EP4
Pressure (bar) equal to
4mA. Referring to the
adjustment sensor.
-1.0…EP2-0,1
(with mOd=0)
0.0
*
(with mOd=1 or
2)
0.0
EP2
Pressure (bar) equal to
20mA. Referring to the
adjustment sensor.
EP4+0,1…50.0
(with mOd=0)
12.0
*
(with mOd=1 or
2)
30.0

DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 16
NiP
Time (hours) in which
the activation of the
manual central alarm is
triggered 5 times. At the
5th activation, it
remains in alarm.
0 240 hours
6 hours
rLo
Time (min.) with which
the freon/oil pre-alarm
becomes alarm. Once
this time has passed,
all outputs are disabled.
0 240 min
30 min
iOv
Offset Inverter fans (of
the pressure)
Value always less than
the (r0) value
0.5 2.5 bar
Always < r0
0.5
iMv
Inverter fans: minimum
0-10V output value
setting
0 100 %
30 %
BOv
Boost fans: Time for
which the 0-10V output
of the fans is pushed to
100%. This is used to
win the breakaway at
their start. (SECONDS)
0 240 sec
2 sec
LSE
Minimum value that can
be attributed to set
point
with mOd=0
-0.6…HSE-0.2
(with mOd=0)
0.2
*
with mOd=1 or 2
0.0…HSE-0.2
(with mOd=1 or
2)
10.0
HSE
Maximum value that
can be attributed to set
point
with mOd=0
LSE+0.2…10.0
(with mOd=0)
5.0
*
with mOd=1 or 2
LSE+0.2…30.0
(with mOd=1 or
2)
25.0
Ald
Minimum or maximum
pressure alarm
signalling and display
delay time.
(This parameter has meaning
only if mOd=0.)
0...240 min
120 min
CAL
Adjustment sensor
calibration
-10.0…+10.0
step 0.1 bar
0.0

Chapter 5 –Data programming DIN NANO 3RK
Page 17
Rev. 01-16
Ad
Network address for
connection to the
TeleNET or Modbus
supervision system
0 to 31 (with SEr=0)
1 to 247 (with SEr=1)
1
SEr
RS-485 communication
protocol
0= TeleNET protocol (NOT
PRESENT IN THE rel. 0 and 1)
1 = Modbus-RTU protocol
0
Bdr
Modbus baudrate.
0 = 300 baud
1 = 600 baud
2 = 1200 baud
3 = 2400 baud
4 = 4800 baud
5 = 9600 baud
6 = 14400 baud
7 = 19200 baud
8 = 38400 baud
5
Prt
Modbus parity checking.
0 = no parity bit
1 = even parity bit
2 = odd parity bit
0
P1
Password: type of
protection
(Active when PA is not
0)
0 = shows only the set point and
permits deactivation of the
alarms.
1 = disables access to level 1,2
and 3 programming (access
permitted to all other functions).
2 = disables access to level 2 and
3 programming (access
permitted to all other functions).
3 = disables access to level 3
programming (access permitted
to all other functions).
3
PA
Password
(see P1 for the type of
protection)
0...999
0 = function disabled
0
dEF
Reserved parameter
read-only
reL
Software release
read-only

DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 18
LEVEL 3 PROGRAMMING (Installer level)
To access Level 3 programming, press and hold the UP key () and STAND-BY key for over 3 seconds.
When the first programming variable appears:
1. Select the variable you want to change with the key () or with the key (). After selecting the required
variable, it is possible to:
2. View its configuration by pressing the SET key.
3. Edit configuration by pressing and holding the SET key and pressing either the () or () key.
4. After setting the configuration values, press and hold both the () key and the () key for a few seconds
until the cell temperature value appears and exit the menu.
5. Any changes made to the variables are saved automatically when the system closes the configuration
menu.
LIST OF LEVEL 3 VARIABLES (Installer Level)
LABEL
MEANING
VALUES
DEFAULT
default
mOd
mOd
Operating mode
selection:
0=Compressor control
with digital outputs
(sideband)
1= Condenser fan control
with digital outputs
(sideband)
2= Condenser fan control
with 0-10V analogue
output (sideband)
2= Compressor control
with 0-10V analogue
output (sideband)
PLEASE NOTE:
the mOd Exchange
involves loading default
settings dedicated on the
variables marked with an
asterisk in the "default
mOd" column
0…3
0
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Chapter 5 –Data programming DIN NANO 3RK
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Rev. 01-16
ACTIVATION SEQUENCE AND DELAYS
The activation logic of the digital outputs is selected by the Seq parameter.
With Seq=1, the activation of digital outputs always follows the 1, 2, 3 sequence and the 3, 2, 1 disabling one
complying with the t1, t2, t3 and t4 times. If an output is not available because it is alarm, it will be
temporarily excluded from the sequence.
With Seq=0 the activation/deactivation of the digital outputs is operation time-based, and in particular:
- The output that has the least number of operating hours in times t1, t2, t3 and t4, and that is available at
that time (therefore not in alarm).
- The output that has the largest number of operating hours in times t1, t2, t3 and t4 is deactivated.
“t1” determines the minimum time that must elapse between the insertion of a step and the next one. This
parameter avoids breakaways caused by simultaneous start-ups.
“t2” determines the minimum time that must elapse between the deactivation of two different steps.
“t3” determines the minimum time that must elapse between two subsequent insertions of the same
step. This parameter allows you to limit the number of start-ups per hour if the controlled motors
require this.
“t4” determines the minimum time that must elapse between one shutdown and the next insertion of the
same compressor step.
On the LED display, icons 6, 7, and 8 will flash when its output is pending ON or OFF due to these times.
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DIN NANO 3RK Chapter 5 –Data programming
Rev. 01-16
Page 20
OPERATING MODE
The mOd variable allows the operating mode of the controller to be selected.
PLEASE NOTE: the change of the mOd involves the loading of the default settings dedicated on variables
marked with an asterisk in the "default mOd" column and is therefore the first variable that must be set at the
first start-up.
With mOd=0 you have the Compressor management with digital outputs and sideband type adjustment.
The LED icon (10) turns on to identify the compressors control.
The adjustment pressure sensor (terminals 23 /24) is connected to the inlet pressure sensor.
Based on the value of the "SP" (set point), "r0" and "NO" parameters, the control calculates the various
points of insertion and deactivation of the compressor outputs (steps) by placing the various start-ups and
switching off within the r0 differential range. Each step has an r0/NO differential (where NO is the total
number of compressors).
The combination of the outlets to the steps depends on the setting of the Seq. variable.
For example, considering seq = 1 and mOd = 0, for Output No. 2, insertion will take place at SP+(r0/NO)*2
(the constant 2 indicates step 2) and deactivation will take place at SP+(r0/NO)*1 (See graph 1).
The number of compressors inserted depends on the deviation between the value measured by the
adjustment pressure sensor (positioned at vacuum) and the set vacuum Set Point.
CONTROL IN THE EVENT OF ALARMS
With the presence of alarms (alarm outputs 1, 2 and 3 alarm inputs enabled), operation is maintained equal
but the output relating to the alarm in the sequence and the relative alarm is shown on the display (EC1, EC2
or EC3).
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