Novus N321R User manual

TEMPERATURE CONTROLLER
N321R
OPERATING MANUAL V1.9x A
N321R is an electronic controllerfor refrigeration and has features to facilitate the defrost
process. It has input for temperature sensors type Pt100 or NTC thermistor and can correct
indication errors (Offset). Each type of sensor has a specific temperature measurement
range. The controller has a relay-typecontrol output with Common, NO and NC contacts.
The characteristics of each controller are identified on the body of the device and according
to the purchase order.
SPECIFICATIONS
SENSOR INPUT: The sensor is chosen at the timeof purchase and displayed on the top
side of the thermometercase. The options are:
•Thermistor NTC: 10 kΩ@ 25 °C; Range: -50 to 120 °C (-58 to 248 °F); Accuracy: 0.6
°C (1.1 °F).
Maximum error in the interchangeability of original NTC sensors: 0.75 °C (1.35°F). This
error can be eliminated through the Offset parameter of the equipment.
Note: For the NTC thermistor option, the sensor is included in the equipment. Its
operating range is limited to -30 to +105 °C (-222 to +221 °F). It has a 3 m long, 2 x
0.5 mm² cable, which can be extended up to 200 meters.
•Pt100: Range: -50 to 300 °C (-58 to 572 °F); α= 0,00385; 3 wires; Accuracy: 0.7 °C (1.3
°F); according to IEC-751 standards.
MeasurementResolution:............................................................ 0.1° from -19.9 to 199.9°
............................................................................1°C elsewhere
Note: The equipment keeps its precision all over the range, despite the lack of display
resolution in a part of the range does not allow its visualization.
OUTPUT1: .......................... Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)
POWER SUPPLY: Voltage ........................................................ 100 to 240 Vac/dc(± 10 %)
Optionally: ........................................................................... 12 to 30 Vdc
Mains frequency: ..................................................................... 50~60 Hz
Power consumption:........................................................................ 5 VA
Dimensions: Width x Height x Depth: ................................................ 75 x 33 x 75 mm
Weight: ............................................................................................100 g
Panel cut-out: ........................................................................70 x 29 mm
Environment: 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
Housing: Polycarbonate UL94V-2
Protection: Housing IP42, Frontal panel IP65
Suitable wiring: Up to 4.0 mm².
Serial interface not isolated from input circuit.
Serial interface isolated from power supply circuit, except for themodel with 24 V
supply.
ELECTRICAL WIRING
The figure below indicates the connection terminals for the sensor,power and
controller output and a connection example.
Fig. 01 - Connections shown on controllerlabel
* The serial communication interface is optional.
Pt100 with 3-wire connection. For 2-wire connection, terminals 11 and 13 must be
interconnected. For proper cable resistance compensation, the conductors must all
have the same electrical resistances (same cross section).
INSTALLATIONRECOMMENDATIONS
•Input signal conductors must run through the plant separately from the supply and
output conductors. If possible, in grounded conduits.
•All electronic instruments must be powered by a clean mains supply, proper for
instrumentation.
•It is recommended to use RC FILTERS (47 Ω and 100 nF, series combination) at
contractor coils, solenoids, etc.
OPERATION
Before use, you must configure the controller. To configure it, youmust set values for
the parameters that determine how the equipment operates. These configuration
parameters are organized in groups or levels, calledparameter levels:
LEVEL
FUNCTION
0
Temperature Measurement
1
Setpoint Adjustment / Voltage indication
2
Parameters Configuration
3
Calibration
When you turn on the controller, the display shows the version of the equipmentfor 1
second. This information is important for eventual consultationswith the manufacturer.
Then, the controller starts presentingthe temperature value measured by the sensor.
This is level 0 or the Temperature Measurementlevel.
To access level 1, press key for 1 second until the SPmessage shows up. Press
key to go back to level 0.
To access level 2, press key for 2 seconds until the Unt message shows up.
Release the key to remain in this level. Press key to advance to thenext
parameter in that level. At the end of the level, the controller returns to the first level
(0). Use the and keys to alter a parameter value.
Notes:
1
The programming is savedby the controller when it switches from
one parameter to another, and only then is it considered valid.
Even in the event of a power outage, the programming is saved
in permanent memory.
2
If the keys arenot used for longer than 20 seconds, the controller
returns to the measuring level, finishing and saving the
programming done so far.
Level 1 –Setpoint Adjustment
This level displays the Setpoint (SP) parameteronly. It sets the desired temperature
value for the system. The current SP valueis shown alternately. To program the
desired value, use the and keys.
U
Voltage
Screen indicating the measured electrical voltage. If the voltage is below 150 V,
it should indicate 0. When it exceeds 254 V, it should saturate and indicate 255
V.
Function available only for N321R-NTC-LVD model.
SP
Setpoint
Adjustment of the control temperature or working temperature. This
adjustment is limited to the values programmed in SPL and SPk (see below).
Level 2 –Configuration Level
Displays the sequence of parameters that must be set by the user. The parameters
are shown alternately with their values. To program the desired value, use the and
keys.
Unt
Unit
Temperature unit. It allows you to choose the display unit for the measured
temperature.
0Temperature in Celsius degrees
1 Temperature in Fahrenheit degrees
oFS
Offset
Adjustment for temperature indication. Allows you to make small
adjustments to the temperature display, seeking to correct measurement
errors that appear, for example, when replacing the NTC temperature sensor.
SPL
SP Low Limit
Setpoint lower limit. Minimum value that can be used to program the
Setpoint. Must be programmed with a lower value than the one
programmed in spK.
SPH
SP High Limit
Setpoint upper limit. Maximum value that can be used to program the
Setpoint. Must be programmed with a higher value than the one programmed
in spK.
HYs
Hysteresis
Control hysteresis. Differential between the point of turning the control
output relay on and off. In degrees.
oFT
Off time
Defines the minimum off time for control output. Once the control output is
turned off, it remains so for at least the time programmed in this parameter.
Typically used to increase the life of the compressor in a refrigeration system.
For heating applications, program zero. Value in seconds (0 to 999 seconds).
ont
On time
Defines the minimum on time for control output. Once the control output is
turned on, it remains so for at least the time programmed in this parameter.
Typically used to increase the life of the compressor in a refrigeration system.
For heating applications, program zero. Value in seconds (0 to 999 seconds).
dLy
Delay
Delay time for control start. After the controller is switched on, the control
output will only be switched on when the time programmed in this
parameter has elapsed. Used in large refrigeration systems to prevent
simultaneous compressor starts on return from a power failure. Value in
seconds (0 to 250 seconds).
dIb
Defrost
Interval Base
Time base for dfi:
0Seconds
1Minutes
2Hours
dtb
Defrost Time
Base
Time base for dft:
0Seconds
1Minutes
2Hours
Literature # 1739

dFi
Unit
Interval between defrost cycles. Adjustable between 0 and 999
seconds/minutes/hours, depending on the specified time base.
dFt
Offset
Defrost duration. Adjustable between 0 and 999 seconds/minutes/hours ,
depending on the specified time base.
dFh
SP Low Limit
Hold the temperature indication throughout the defrost interval or the time defined
by this parameter.
0Allows to update the defrost indication.
1to 250 Time (seconds/minutes/hours) besides the defrost time the
indication will remain held.
CPE
SP High Limit
Enables compressor protection by monitoring the electrical voltage if the
mains voltage is not between the Setpoints C P L and C PH.
0Disables compressor protection.
1Enable compressor protection.
Function available only for N321R-NTC-LVD model.
CPt
Hysteresis
Determines a delay in compressor shutdown during the activation of compressor
protection by voltage monitoring. Adjustable time interval between 5 and 30
seconds.
Function available only for N321R-NTC-LVD model.
CPL
Off time
Voltage lower limit used by the compressor protection. Voltage minimum
value at which the compressor can operate.
Parameter adjustable between 150 to 254 Vac must be obligatorily 5 Vac
lower than the value set at the higher limit (CPH).
Function available only for N321R-NTC-LVD model.
CPh
On time
Voltage higher limit used by the compressor protection. Voltage maximum
value at which the compressor can operate.
Parameter adjustable between 150 to 254 Vac must be obligatorily 5 Vac
higher than the value set at the lower limit (C P L ).
Function available only for N321R-NTC-LVD model.
Add
Delay
Controllers with the optional RS485 Modbus RTU communication interfac e
have the Add parameter at the Configuration level. Set a unique
communication address for each equipment connected to the network. You
must set an address between 1 and 247.
Level 3 –Calibration Level
The controller is factory calibrated. Recalibration should only be done by qualified
personnel. Press the key for 3 seconds to access this level. This level alsocontains
the parameters for protectionconfiguration.
If you access it by accident, go throughall the parameters without changing them,
until the controller returnsto the measurement level.
PAS
Password. Parameter to enter a password to allow changes to the other
parameters.
CAL
Calibration Low. Calibration of the measuring range offset. Adjustment of
the lower value of the sensor measuring range.
CAH
Calibration High - Gain calibration. Adjustment of the upper value of the
sensor measuring range.
UoL
Voltage Calibration. Offset adjustment for calibrating the voltage
indication. Adjustable between -20 to 20 °C (-4 to 68 °F). Function available only
for N321R-NTC-LVD model.
FrQ
Frequency. Line frequency. Line frequency setting for the supply voltage
supervisor.
060 Hz
150 Hz
Function available only for N321R-NTC-LVD model.
CJL
Cold Junction Calibration. Function available only for thermocouples.
FAC
Factory Calibration. Restores factory calibration parameters. When changed
from 0to 1, the original calibration is retrieved and changes to the calibration
will be ignored.
Prt
Protection. Defines the levels of parameters to be protected.
PAC
Password Change. Parameter that allows you to change the curren t
password. You can set the password to a number between 1 and 999.
Sn2
Serial number. First part of the controller electronic serial number.
Sn1
Serial number. Second part of the controller electronic serial number.
Sn0
Serial number. Third part of the controller electronic serial number.
WORKING WITH THE CONTROLLER
The controller turns on the control output to maintain the system temperature at the
selected Setpoint. The front panel display shows the symbol whenever the compressor
is active. The defrost processof this controller is executed by stopping the compressor.
This procedure is done every time interval defined by the user. The control outputremains
off by time also defined by the user. During the defrost procedure, the temperature
indication can be held by adjusting theparameter dFk.
The d f 1 and dFt parameters define, respectively, the time interval betweendefrosts
and the duration of the defrost cycle. The controller displayshowsthe symbol to
indicate that a defrost cycle is in progress.
Manual defrost: The key allows you to start or stop the defrost immediately. By
pressing this key for 1 second, the controller is forced into defrost. If it is in defrost, it will
be forced to end.
CONFIGURATION PROTECTION
The configuration protectionsystem prevents unduechanges to the controller
parameters and, consequently, to its operating mode. This system is composed of
parameters that define the degree of protectionadopted (whether total or only partial).
Parameters that define protection:
P A s : Parameter to enter a password to allow changes in theother parameters.
P r t : Parameter to define the level of parameters that will be protected:
1- Only Calibration level is protected (Default configuration).
2- Calibration and Configuration levels are protected.
3- All levels are protected: Calibration, Configuration and SP.
PAC Parameter to changethe current password. Valid passwordsare in the range
0 to 999.
Configuration protection usage
The PAS parameter is displayed before entering a protected level. If the correct
password is entered, parametersin all following levels can be changed. If wrong or no
password is entered, parametersin the following levels will be read-only.
Important notes:
1 - After 5consecutive attempts to enter a wrong password, new tentative will be
blocked for the next 10 minutes. If the current valid password is unknown, the
master password can be used only to define a new password for thecontroller.
2 - The equipment leaves the factory with password 111.
MASTER PASSWORD
The master password, whichallows you todefine a new password for the controller, is
based in the serial number of thecontroller, and calculated as following:
[ 1 ] + [ higher digit of SN2 ] + [ higher digit of SN1 ] + [ higher digit of SN0 ]
For example, the master password for a devicewithserial number 97123 465 is: 1936
As follows: 1 + sn2= 97; sn1= 123; sn0= 465 = 1 9 3 6
How to use the master password:
1 - In the PA S parameter, enter the master password.
2 - In the PACparameter, enter a new password, which mustnot be zero (0).
3 - Use this new password.
ERROR MESSAGES
On the display, the controllershows messages that correspond to problemsrelated to
the temperature measurement. Wheneverthey are displayed, the control output relay is
turned off.
•Measured temperature exceeded maximum measurement range of the
sensor.
•Broken Pt100. Short-circuited NTC sensor.
•Measured temperature exceeded minimum measurement range of the
sensor.
•Short circuited Pt100. Broken NTC.
COMPRESSOR PROTECTION (N321R-NTC-LVD)
The controller constantly monitors the voltage of power networkand shutsthe compressor
if this tension is not within limits. These limitsare defined in parameters CPL and CPK,
adjustable between150 and 254 Vac.
In addition to shuttingdown the compressor, the controller starts to signal this occurrence
on its display: Toggles the indication of voltage value measured with the temperature
value.
If the voltage is below 150 Vac, it should indicate 0. When it exceeds 254 Vac, it should
saturate and indicate 255 Vac.
WARRANTY
For warranty conditions and returns, please contact [e-mail]
Temperature °Controls Pty Ltd
7 Yamma Street, Sefton NSW 2162 61 2 9721 8644
8/280 Whitehall St., Yarraville VIC 2013 61 3 9687 0000
36 121-125 Kerry Rd., Archerfield QLD 4108 61 7 3373 8424
[e-mail]
www.temperature.com.au
www.temperatureshop.com.au
Literature # 1739