Novus N323TR Operating Manual

TEMPERATURE CONTROLLER
N323TR
OPERATING MANUAL -
N323TR is a temperature controller for cooling systems that has a number of specially developed
functions for applications in temperature control and defrosts optimization. It presents an internal
clock for defrost schedule, with weekly schedule, daily or days or working days. It has two input
channels for temperature sensors, NTC thermistors, to measure the temperature of the supervised
environment and the evaporator module. It has three independent outputs for the control of the
compressor (cooling output), defrost module and fan.
The characteristics of the controller are in accordance with the purchase order and are shown on
the label attached to the case of the controller.
SPECIFICATIONS
SENSOR INPUT: .................................................................................................... 2 Thermistors NTC
............................................................................................................................ Type 10 kΩ @ 25 °C
................................................................................................... Range: –50 to 120 °C (-58 to 248°F)
...................................................................................................................... Accuracy: 0.6 °C (1.1 °F)
Note: The sensors come with the equipment. Its operating range is limited to –30 to +105 °C (–222
to +221 °F). It has cable of 3 m in length, 2 x 0.5 mm², and can be extended up to 200 meters.
Maximum error in the interchangeability of original NTC sensors: 0.75 °C (33.35 °F). This error can
be eliminated through the offset parameter of the equipment.
Measurement Resolution: .................................................. 0.1 °C in the range of –19.9 to 119.9 °C
.................................................................................................................. 1 °C in the rest of the range
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 Res.)
.................................................................. Optionally: Pulse, 5 Vdc, 25 mA max.
OUTPUT2: ........................................................................................... Relay SPST-NA, 3 A / 250 Vac
OUTPUT3: ........................................................................................... Relay SPST-NA, 3 A / 250 Vac
POWER SUPPLY: Tension: ..................................... 100 to 240 Vca/cc ±10 %
Optionally: ...................................................... 12 to 30 Vdc
Frequency: .......................................................... 50~60 Hz
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: Operation temperature: ............................... 0 to 40 °C (32 to 104 °F)
Storage temperature: ............................... -20 to 60 °C (-4 to 140 °F)
Relative Humidity: ....................................................... 20 to 85 % UR
Case in Polycarbonate UL94 V-2; Protection: box IP42, front panel IP65;
Suitable wiring 4.0 mm²; Interface RS485 MODBUS protocol (optional);
Non-isolated serial interface input circuit. Isolated interface from the supply circuit except in the 24
V supply model.
Recommendations for the Installation
The cables of the temperature sensors must be separated from the control and power supply cables, if
possible, in grounded conduits.
The controller power supply should preferably come from an exclusive power network for the
instruments or in a different circuit from that used by the control output stage.
It is recommended to use RC filters (47 R and 100 nF, series) in coils of contactors, solenoids, etc.
ELECTRICAL WIRING
Figure 01 shows the connection terminals for power supply, sensors and outputs.
Figure 01 – Connections shown in the label on the controller case.
OPERATION
Before using the controller, it must be configured by the user. This setting is to set the values for
the various parameters that determine the operation mode of the equipment. These configuration
V1.8x E
parameters are organized into groups or levels, called level parameters.
Man 5001288
Level
0
1
2
3
4
Upon power-up, the N323TR display shows for 1 second its firmware version. This information is
useful when consulting the factory.
The controller then starts to display the value of the environment temperature measured by sensor
1.This is the 0 level or Temperature Measurement level. To access the level 1, press
second until the "SP" parameter appears. Release the key
to return to the level of temperature measurement. To access the second level, press
seconds until the "uNT" parameter appears. Release the key
to access the other parameters in this level. After the last parameter the controller back to the
level of temperature measurement.
Use the and
Notes: 1 The parameters are saved by the controller when it passes from a parameter to
another and only then it will be considered valid. The configuration is stored in a
permanent memory, even in the lack of electrical power.
2 If the keys are not used for more than 20 seconds, the controller returns to the level
of measurement, finalizing and saving the programming previously made.
3 While in the temperature measurement level, a momentary pressing on the
will show the sensor 2 temperature (evaporator temperature).
Level 1 – Setpoint Adjustment
In this level only the Setpoint (SP) parameters are available, alternating the names with their
respective values. Adjust the desired temperature for each setpoint clicking on the
keys.
SP
Set Point
Level 2 – Level of Operation Mode
Show other parameters that must be set by the user. The parameters are shown alternately with their
respective values.
Unt
Unit
Of1
Offset Sensor
1
Of2
Offset Sensor
2
Spl
SP Low Limit
spK
SP High Limit
Kys
Hysteresis
(nt
Control
Function
Temperature measurement
Setpoint Adjustment
Operation Mode
Defrost Schedule
Calibration
to stay at this level. Press again
to stay at this level. Press again
keys to alter a parameter value:
Case of coldroom temperate adjustment. SP value is limited to the values
programmed in SPL and SPk in the programming level (Parameter
configuration, Level 2).
Temperature Unit. Allows the user to select the temperature unit for all parameters of
the controller.
0 Temperature Celsius;
1 Temperature Fahrenheit.
Offset value to be added to the sensor 1 measured temperature such as to perform
fine adjustments to the value showed on the display (after sensor replacement, for
instance, if required). In degrees, adjustable from 0.1 to 10.0 degrees.
Offset value to be added to the sensor 2 measured temperature to perform fine
adjustments to the value showed on the display (after sensor replacement, for
instance, if required). Adjustable from -10.0 to 10.0 degrees.
Setpoint low limit: set a minimum value for the setpoint.
Setpoint high limit: set a maximum value for the setpoint. Must be set to a value
greater than spl.
Hysteresis for output cooling: Difference between ON and OFF for the cooling
output. Adjustable from 0.1 to 50.0 degrees.
Defines the output position for the refrigeration (compressor).
0 Refrigeration in OUTPUT1 / Defrost in OUTPUT2. (factory default)
1 Refrigeration in OUTPUT2 / Defrost in OUTPUT1.
Time delay to start cooling. After the controller is turned on, the cooling output will
Dly
only be triggered when the elapsed time set in this parameter. Used in large
Delay
refrigeration systems to prevent simultaneous starts for compressors in the return
of power failure. Value in seconds, 0 to 250 s.
Sets the minimum time to be turned ON the cooling output. Once the cooling output
0nt
is activated, it will remain so for at least the time set in this parameter. Typically used
On Time
to increase the service life of the compressor in the refrigeration system. Value in
seconds, 0 to 999 s.
Sets the minimum time to be turned OFF the cooling output. Once the cooling output
0ft
is activated, it will remain so for at least the time set in this parameter. Typically used
Off Time
to increase the service life of the compressor in the refrigeration system. Value in
seconds, 0 to 999 s. Value in seconds, 0 to 999 s.
Defrost starts as configured in DFi.
0
SCk
1 Defrost starts as schedule.
Schedule
Interval between defrost. Adjustable from 0 to 999 minutes. During this time, the
dfi
defrost output remains off.
Defrost
for 1
0 (zero), determines no stops in the defrost process.
Interval
Defrost duration. Interval time during which the defrost output remains on.
Dft
for 2
Value in minutes, 1 to 999.
Defrost Time
Compressor output behavior during the defrost cycle.
df(
Cooling output is OFF during defrost;
0
Defrost
Cooling output is ON during defrost;
Compressor
1
2 Compressor output works normally, turning on and off to maintain the
temperature.
Temperature for finalizing the defrost – Value of the evaporator temperature
Dfs
measured by the sensor 2 which, when reached determines the end of the defrost
Defrost
cycle, even if the interval of defrost duration has not ended. Adjustable between –
Temperature
key
50 and 120 degrees.
Important note: The defrost cycle will not initiate if the evaporator temperature is
the value defined in this parameter.
Drain down time – After defrost is still necessary a time interval with outputs in
ddt
OFF; this is because may there be water accumulated on the evaporator. This
and
Defrost
interval must be rated so that these drops of water are eliminated. Adjustable
Drainage
Time between 0 and 999 minutes.
Evaporator temperature for liberating the fan – After defrost and the draining,
Frs
refrigeration is turned ON immediately because the ambient temperature should
Fan
be high. To prevent this hot air circulate in a controlled environment, requiring
Return
Set Point more energy to lower the temperature, the controller prevents the ventilation
output (OUTPUT3) is turned ON until the evaporator temperature drops to the
value defined in this parameter.
Fan maximum delay after draining – For the safety of products stored, if the
fdl
evaporator temperature does not reach the set value in frs, the return of ventilation
Fan
will happen at the end of the time interval set in this parameter. Adjustable between 0
Drainage
Limit and 999 minutes.
Fan behavior during refrigeration.
foc
0 Fan is active only when the compressor is on.
Fun
Operation
1 Fan is active during the complete refrigeration cycle, even when the
With
compressor is turned off.
Compressor
Fan behavior during defrost.
fod
0 Fan is off during the defrost cycle.
Fun
On Operation
1 Fan is active during the defrost cycle.
Defrost
Fan deactivation due to evaporator heating – Turn OFF the fan when the
fss
evaporator heats up, improving system efficiency and protecting the compressor.
Fun
The fan is allowed to turn on again when the temperature drops 2 degrees below
Stop
Set Point the value defined in this parameter.
Sets the behavior of the compressor with sensor 1 (room temperature)
Coe
disconnected - When sensor 1 is with issues (disconnected, broken, etc.) the
Compressor
compressor assumes the condition defined in this parameter.
Operation
On Sensor Compressor is deactivated when sensor 1 is in error.
0
Error
Compressor is activated when sensor 1 is in error.
1