Novus N323TR User manual

NOVUS AUTOMATION 1/5
N
323TR
TEMPERATURE CONTROLLER
– USER GUIDE – V1.8x K
1. SAFETY ALERTS
The symbols below are used in the device and throughout this
manual to draw the user’s attention to valuable information related to
device safety and use.
CAUTION:
Read the manual fully before
installing and operating the
device.
CAUTION OR HAZARD:
Risk of electric shock.
All safety recommendations appearing in this manual must be
followed to ensure personal safety and prevent damage to the
instrument or system. If the instrument is used in a manner other
than that specified in this manual, the device’s safety protections may
not be effective.
2. SUMMARY
1. SAFETY ALERTS........................................................................ 1
2. SUMMARY .................................................................................. 1
3. PRESENTATION......................................................................... 1
4. SPECIFICATIONS....................................................................... 1
5. ELECTRICAL CONNECTIONS................................................... 2
5.1 INSTALLATION RECOMMENDATIONS.............................. 2
6. OPERATION................................................................................ 2
6.1 LEVEL 1 – SETPOINT ADJUSTMENT LEVEL.................... 2
6.2 LEVEL 2 – OPERATION MODE LEVEL .............................. 2
6.3 LEVEL 3 – DEFROST SCHEDULING LEVEL ..................... 4
6.4 LEVEL 4 – CALIBRATION LEVEL ....................................... 4
7. WORKING WITH THE CONTROLLER....................................... 5
7.1 DEFROST PROCESS.......................................................... 5
8. CONFIGURATION PROTECTION.............................................. 5
8.1 CONFIGURATION PROTECTION OPERATION................. 5
9. MASTER PASSWORD................................................................ 5
9.1 HOW TO USE YOUR MASTER PASSWORD..................... 5
10. ERROR INDICATION.................................................................. 5
11. WARRANTY ................................................................................ 5
3. PRESENTATION
N323TR is a temperature controller suitable for refrigeration, with
functions designed for temperature control applications and
optimization of the defrosting process.
Its internal clock allows you to program defrost times and days.
It has 2 input channels for temperature sensors (NTC thermistors)
that measure the temperature of the monitored environment and the
evaporator module.
It has 3 independent outputs to control the compressor (refrigeration
output), the defrost module, and the fan.
The details of the controller are in accordance with the purchase
order and are shown on the label attached to the controller.
4. SPECIFICATIONS
SENSOR INPUT:
2 NTC Thermistors: Type 10 kΩ@ 25 °C | Measurement range:
-50 to 120 °C (-58 to 248 °F) | Accuracy: 0.6 °C (1.1 °F).
Note: The sensors are supplied with the equipment.
Its operating range is -30 to 105 °C (-22 to 221 °F). It has a 3 m
long cable (2 x 0.5 mm²), which can be extended up to 200
meters.
Maximum error when interchanging original NTC sensors: 0.75 °C
(33.35 °F). This error can be removed by using the Offset
parameter of the controller.
Measurement resolution:........ 0.1 °C in the range -19.9 to 199.9 °C
...........................................................................(-3.8 to 391.8 °F).
............................................................................ 1 °C: Elsewhere.
Note: The equipment maintains accuracy over the entire range,
although the low resolution of the display in a portion of the range
does not allow it to be visualized.
OUTPUT1:.............................................. SPDT Relay; 1 HP 250 Vac /
....................................................1/3 HP 125 Vac (16 A Resistive)
Optionally:.....................................Pulse, 5 Vdc, 25 mA maximum
OUTPUT 2:...........................................SPST-NO relay, 3 A / 250 Vac
OUTPUT 3:...........................................SPST-NO relay, 3 A / 250 Vac
POWER SUPPLY:
Voltage:.................................................100~240 Vac/dc (±10 %)
Optionally:..................................................... 24 V (12~30 Vdc) (*)
Frequency:......................................................................50~60 Hz
Consumption:..........................................................................5 VA
(*) Note: Models with a 24 V power supply do not have electrical
isolation between the power supply, input, and RS485
communication circuits.
In direct current (Vdc) supply networks, you must observe the
polarity of the connection.
Dimensions:
Width x Height x Depth:.......................................75 x 33 x 75 mm
Panel cutout:................................................................70 x 29 mm
Weight:.................................................................................. 100 g

N323TR
NOVUS AUTOMATION 2/5
Operation conditions:
Operating temperature: ...................0 to 40 °C (32 to 104 °F)
Storage temperature:.................... -20 to 60 °C (-4 to 140 °F)
Relative humidity: ............................................20 to 85 % RH
UL94 V-2 Polycarbonate housing.
Protection index: Housing: IP42 | Front Panel: IP65.
Connections for wires up to 4.0 mm².
RS485 interface with Modbus protocol (optional).
Serial interface not isolated from input circuit.
Interface isolated from the power supply circuit, except for the
model with 24 V power supply.
Certifications: CE, UKCA, UL.
5. ELECTRICAL CONNECTIONS
The following figure shows the connection, power supply, and output
terminals of the controller:
Figure 1 – Electrical connections
5.1 INSTALLATION RECOMMENDATIONS
•Input signal conductors should run through the plant separate
from output and supply conductors. If possible, in grounded
conduits.
•The power supply for electronic instruments must come from a
network specific to the instrumentation.
•It is recommended to use RC FILTERS (noise suppressors) in
contactor coils, solenoids, etc.
6. OPERATION
Before use, the controller must be configured. To configure it, you
must set values for the parameters that determine how the
equipment operates.
These configuration parameters are organized in groups or Levels,
called Parameter Levels:
LEVEL
RELATED FUNCTIONS
0
Temperature measurement
1
Setpoint adjustment
2 Operation Mode
3 Defrost Schedule
4 Calibration
Table 1 –Paramater levels
When the controller is turned on, the display will show the version of
the internal software. The controller will then display the temperature
value measured by the sensor. This is level 0or the Temperature
Measurement level.
To access level 1, press for 1 second, until SP parameter is
displayed. To return to the Temperature Measurement level, press
.
To access level 2, press for 2 seconds, until Unt parameter is
displayed. Release the key to remain at this level. To access the
other parameters of this level, press again. After the last
parameter, the controller will return to the temperature measurement
level.
To change the parameter values, use the and keys.
Notes:
1. The controller saves the programming when you move from
one parameter to another. Only then will it be considered valid.
Even in the event of a power outage, the configuration is
stored in permanent memory.
2. If the keys are not used for a time longer than 20 seconds, the
controller returns to the measuring level, finishing and saving
the configuration done so far.
3. When in temperature measurement mode, a short press of the
key will cause the controller to temporarily display the
temperature value measured by sensor 2 – Evaporator
temperature.
6.1 LEVEL 1 – SETPOINT ADJUSTMENT LEVEL
This level displays the Setpoint parameters. It sets the desired
temperature value for the system. The current SP value is shown
alternating with the parameter value.
To change the parameter values, use the and keys.
SP
Setpoint
Temperature control adjustment.
This adjustment is limited to the values programmed in
SPL
and
SPH
.
6.2 LEVEL 2 – OPERATION MODE LEVEL
Display the other parameters. The parameters are shown alternately
with their values.
To change the parameter values, use the and keys.
Unt
Unit
Temperature unit.
Allows you to define
the display unit of the measured
temperature:
0
Temperature in Celsius degrees.
1
Temperature in Fahrenheit degrees.
Of1
Offset
Sensor 1
Value to correct the temperature measured by Sensor
1.
Allows you to make small adjustments to the ambient
temperature indication to correct measurement errors
that appear, for example, when replacing the
temperature sensor.
Adjustable from 0.1 to 10.0 degrees.
Of2
Offset
Sensor 2
Value to correct the temperature measured by Sensor
2.
Allows you to make small adjustments to the evaporator
to correct measurement errors that appear, for
example, when replacing the temperature sensor.
Adjustable from -10.0 to 10.0 degrees.
spL
SP Low
Limit
Setpoint lower limit.
Minimum value that can be used when programming a
Setpoint value.
It must be programmed with a lower value than the one
programmed in
spH
.
spH
SP High
Limit
Setpoint upper limit.
Maximum value that can be used when programming a
Setpoint value.
It must be programmed with a higher
value than the
one programmed in
spL
.
Hys
Hysteresis
Hysteresis for the refrigeration output.
Allows you to define the difference between the point at
which the refrigeration output is switched on and off.
Adjustable from 0.1 to 50.0 degrees.

N323TR
NOVUS AUTOMATION 3/5
Cnt
Control
Allows you to define the position of the refrigeration
output (compressor):
0
Refrigeration in OUTPUT1.
Defrost in OUTPUT2.
Factory default.
1
Refrigeration in OUTPUT2.
Defrost in OUTPUT1.
dLy
Delay
Delay to the start of control.
Once the controller is turned on, the output will only be
turned on after the time programmed in this parameter
has elapsed.
Used in large refrigeration systems to prevent
compressors from being activated simultaneously
during a power outage.
Value in seconds. From 0 to 250 s.
0nt
on time
Allows you to define
the minimum on time for the
refrigeration output.
When the refrigeration output is turned on, it will
remain in this condition for at least the time
programmed in this parameter.
Typically used to extend the lifespan of the compressor
in a refrigeration system.
Value in seconds. From 0 to 999 s.
0ft
Off time
Allows you to define the minimum off time for the
refrigeration output.
When the refrigeration output is turned off, it will
remain in
this condition for at least the time
programmed in this parameter.
Typically used to extend the lifespan of the compressor
in a refrigeration system.
Value in seconds. From 0 to 999 s.
SCH
Schedule
Allows you to define the start mode of the defrosting
process:
0
The defrosting process starts as configured in
DFi
.
1
The defrosting process starts according to the
schedule.
dfi
Defrost
Interval
Allows you to define the interval between defrosts.
Adjustable time interval between 0 and 999
minutes in
which the defrost output remains off.
In 0, it determines that there will be no downtime for
the defrosting process.
Dft
Defrost
Time
Allows you to set the duration of the defrost.
Time interval that the defrost output remains on.
Adjustable between 1 and 999 minutes.
dfC
Defrost
Com-
pressor
Allows you to define the behavior of the refrigeration
output during the defrosting process:
0
The refrigeration output is switched off during
the defrosting process.
1
The refrigeration output remains
on during the
defrosting process.
2
The refrigeration output operates normally. It
switches on and off as required to maintain the
temperature.
Dfs
Defrost
Temperature
Allows you to define the temperature for the end of the
defrosting process.
Temperature value measured in the evaporator by
sensor 2 which, when reached, determines the end of
the defrost cycle, even if the defrost duration interval
has not ended.
Adjustable from -50 to 120 degrees.
Important note:
The defrost cycle will not start if the
evaporator temperature is above the value set in this
parameter.
ddt
Defrost
Drainage
Time
Allows you to define the draining time.
After the defrosting process, the output still need to be
switched off for a while, as water can accumulate on
the evaporator.
This interval must be dimensioned so that the water is
eliminated.
Adjustable between 0 and 999 minutes.
Frs
Fan Return
Setpoint
Evaporator temperature value for fan return.
After defrosting and draining, the refrigeration will be
switched on immediately, as the room temperature
must be high.
To prevent this heated air from circulating in the
controlled environment, requiring more energy to lower
the temperature, the controller prevents the ventilation
output (OUTPUT3) from being switched on until the
temperature in the evaporator has dropped to the
value set in this parameter.
fdL
Fan
Drainage
Limit
Maximum time for the fan to return after draining.
For the safety of the stored products, if the
temperature in the evaporator does not reach the value
set in
frs, ventilation will resume at the end of the
time interval set in this parameter.
Adjustable between 0 and 999 minutes.
foc
Fan
Operation
With
Compresso
r
Allows you to define the fan's behavior during
refrigeration:
0
The fan only stays on as long as the
compressor is on.
1
The fan remains on during the entire
refrigeration cycle,
even when the
compressor is switched off.
fod
Fan On
Operation
Defrost
Allows you to define the fan's behavior during the
defrosting process:
0
The fan remains off during defrost.
1
The fan remains on during defrost.
fss
Fan Stop
Setpoint
Fan stops due to evaporator heating.
It switches off the fan when the evaporator heats up,
improving system efficiency and protecting the
compressor.
The fan will turn on again when the temperature drops
by 2 degrees from the value set in this parameter.
Coe
Compresso
r
Operation
On Sensor
Error
Allows you to define the compressor's behavior when
sensor 1 (ambient temperature) is disconnected.
When sensor 1 is defective (disconnected, broken,
etc.), the compressor will assume the condition defined
in this parameter:
0
The compressor switches off when sensor 1
is defective.
1
The compressor switches on when sensor 1
is defective.
dfH
defrost hold
This allows the temperature display to remain
unchanged during the defrost time plus
the time set in
this parameter:
0
Allows you to update the display.
1
to
250
From the moment of defrosting, the
temperature display will remain unchanged,
showing the temperature measured at the
start of the defrosting process.
In seconds, minutes, or hour.
For applications without defrost, set to 0.
Add
Address
Controllers with RS485 serial communication interface
display the
Add
parameter.
In this parameter, you can define a communication
address for each network element.
The address defined must be between 1 and 247.

N323TR
NOVUS AUTOMATION 4/5
6.3 LEVEL 3 – DEFROST SCHEDULING LEVEL
CLc
Current time.
Day
Day of the week.
1-7: Sunday to Saturday.
Pro
0
Weekly schedule (seven days a week).
1
Weekday schedule (Monday-Friday).
2
Daily schedule (every day with the same
schedule).
1:P1
1
:
P2
1
:
P3
...
7
:
P8
Defrosting schedule:
1:P1, 1:P2,..., 1:P8 → Sunday defrosting schedule.
2:P1, 2:P2,..., 2:P8 → Monday defrosting schedule.
3:P1, 3:P2,..., 3:P8 → Tuesday defrosting schedule.
4:P1, 4:P2,.... 4:P8 → Wednesday defrosting
schedule.
5:P1, 5:P2,.... 5:P8 → Thursday defrosting schedule.
6:P1, 6:P2,..., 6:P8 → Friday defrosting schedule.
7:P1, 7:P2,..., 7:P8 → Saturday defrosting schedule.
1 Sunday
1 – 1st program of the day
2 Monday 2 – 2nd program of the day
3 Tuesday 3 – 3rd program of the day
4 Wednesday 4 – 4th program of the day
5 Thursday 5 – 5th program of the day
6 Friday
6 – 6th program of the day
7 Saturday
7 – 7th program of the day
8 – 8th program of the day
Example: 2:P1 (Monday Program 1)
6.4 LEVEL 4 – CALIBRATION LEVEL
The controller leaves the factory already calibrated. When a
recalibration is necessary, it must be performed by a specialized
professional.
To access this level, press the key for more than 3 seconds.
If you access it by accident, simply step through all the parameters,
until the controller returns to the measurement screen.
Pas
Password
Parameter to enter a password that will allow you to
change other parameters.
CL1
Calibration
Low Input
1
Calibration of the input 1 measurement range Offset.
Allows you to adjust the lower value of the sensor
measurement range.
CH1
Calibration
High Input
1
Calibration of the input 1 measurement scale gain.
Allows you to adjust the upper value of the sensor
measurement range.
CL2
Calibration
Low Input
2
Calibration of the input 2 measurement range Offset.
Allows you to adjust the lower value of the sensor
measurement range.
CH2
Calibration
High Input
2
Calibration of the input 2 measurement scale gain.
Allows you to adjust the upper value of the sensor
measurement range.
FAC
Factory
Calibration
Allows you to return to the original calibration of the
controller.
When changing from
0
to
1
, the original calibration will
be restored, and the changes made during the
calibration will be discarded.
PrT
Protection
Allows you to set the parameter levels to be protected.
PAC
Password
Change
Allows to change the current password. You can set
the password to a number between 1 and 999.
Sn2
Serial
Number 2
Displays the first 2 two digits of the electronic serial
number of the controller.
sn1
Serial
Number 1
Displays the middle 3 digits of electronic serial number
of the controller.
sn0
Serial
Number 0
Displays the last 2 two digits of the electronic serial
number of the controller.

N323TR
NOVUS AUTOMATION 5/5
7. WORKING WITH THE CONTROLLER
The controller switches the refrigeration output on or off to bring the
system temperature up to the value set in the Setpoint parameter.
On the front panel, the flag lights up when the refrigeration output
is switched on.
7.1 DEFROST PROCESS
The DEFROST process aims to melt the ice accumulated on the
evaporator, making the refrigeration process more efficient.
The defrosting process occurs periodically and has a defined
duration. However, its execution can be prevented, and its end can
be anticipated depending on the temperature measured directly on
the evaporator. See dfs parameter.
Defrosting can occur by compressor stop, resistance heating, or by
reversing the compressor cycle:
•Defrost by compressor stop: At the start of the defrost
cycle, the refrigeration output will be switched off and the
evaporator will defrost naturally.
•Defrost by resistance heating: The defrosting output will
be used to connect an electric resistance that will heat the
evaporator to melt the accumulated ice. In this mode, the
refrigeration output will also be switched off.
•Defrost by reversing the compressor cycle: The
refrigeration output will not be switched off and the defrost
output will be used to reverse the compressor cycle.
During defrost, the indicated room temperature can be prevented
from being updated, depending on what is programmed in the dfh
parameter.
The dfi and dft parameters define, respectively, the interval
between one defrost and another and the duration of the defrost. On
the front panel of the controller, the flag will light up when the
controller is in the defrosting process.
Manual defrost: The key allows you to start or stop defrosting
immediately. By pressing this key for 3 seconds, the controller will be
forced into defrost. If it is in defrosting process, its end will be forced.
Defining the evaporator temperature at the end of defrosting:
1. Wait for ice to form in the evaporator.
2. Trigger a manual defrost.
3. Visually monitor the evaporator until all the ice has
disappeared.
4. Check the temperature measured by sensor 2 at that
moment (short press on ). This is the value used in the
End Defrost Temperature parameter dfs.
8. CONFIGURATION PROTECTION
The configuration protection system prevents undue changes to the
parameters of the controller and, consequently, its operating mode.
This system is composed of parameters that define the degree of
protection to be adopted (full or partial).
Protection is defined by the following parameters:
Pas
Parameter to enter a password that will allow you to
change other parameters.
Prt
Allows you to set the parameter levels to be protected:
1. Only Calibration
level is protected (factory
configuration).
2. Calibration and Configuration levels are protected.
3. All levels are protected (Calibration, Configuration,
and SP).
PAC
Allows to change the current password. You can set the
password to a number between 1 and 999.
8.1 CONFIGURATION PROTECTION OPERATION
The PAS parameter appears at the beginning of the protected level.
If you enter the password correctly, it is possible to change the
parameters of the protected levels.
If you do not enter the password correctly or simply pass by this
parameter, the parameters of the protected levels can only be
viewed.
Important notes:
1. When you enter an incorrect password 5 consecutive times,
the equipment will prevent new attempts for 10 minutes.
If you do not remember the current password, you can enter a
master password, which only allows you to set a new
password.
2. The equipment leaves the factory with password 111.
9. MASTER PASSWORD
The master password, which allows you to set a new password for
the controller, uses the serial number of the equipment. It is
composed as follows:
[ 1 ] + [ largest number of SN2 ] + [ largest number of SN1 ] +
[ largest number of SN0 ]
The master password for an equipment with serial number 97123465
is: 1936
Example: 1 + sn2 = 97; sn1 = 123; sn0 = 465 = 1 + 9 + 3 + 6
9.1 HOW TO USE YOUR MASTER PASSWORD
1. In the Pas parameter, enter the master password.
2. In the PAC parameter, enter any new non-zero (0) password.
3. Use the new password.
10. ERROR INDICATION
On the display, the controller shows messages that correspond to
problems related to temperature measurement.
Whenever they are displayed, the control output relay will be turned
off immediately.
The measured temperature has exceeded the upper
limit of the sensor measurement range.
NTC sensor short-circuited.
The measured temperature has exceeded the lower
limit of the sensor measurement range.
Broken NTC sensor.
Table 2 –Error indications
11. WARRANTY
Warranty conditions are available on our website
www.novusautomation.com/warranty.