Novus N323R User Manual download pdf

TEMPERATURE CONTROLLER

N323R

OPERATING MANUAL V1.7x

Man 5001283

The N323R is a Refrigeration controller designed to control the temperature of

refrigeration cases and coldrooms, embedding several specialized functions for best

system performance. The N323R can read two temperature probes (controller and

defrost probes) and has three relay outputs for controlling the compressor, the defrost

and the fan.

The controller can be ordered with optional features such as to comply with the

application’s requirements. The label on the instrument housing shows the complete

instrument configuration.

SPECIFICATIONS

PROBE INPUT:....................................................................................... 2 Thermistor NTC

............................................................................................................Type 10 kΩ

ΩΩ

Ω @ 25 °C

...................................................................................Range: –50 to 120 °C (-58 to 248°F)

...................................................................................................................Accuracy: 0,6 °C

Two 3-meter probe cable are bundled with the instrument. The cable can be

extended up to 200 m. Sensor interchangeability: 0,75 °C. This error can be

compensated by the offset parameter in the controller.

Measurement Resolution: .....................................................0,1 °C from –19.9º to 199.9º

.....................................................................................................................1 °C elsewhere

OUTPUT1: .......................Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive)

................................................Optionally: Pulse, 5 Vdc, 25 mA max.

OUTPUT2:........ Relay SPST-NA, 3 A / 250 Vac (General use) ; 5A / 250Vac (Resistive)

OUTPUT3:...................SPST-NA, 3 A / 250 Vac (General use) ; 5A / 250Vac (Resistive)

POWER SUPPLY: .................................100 to 240 Vca/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 x75 mm

Weight: .............................................................................100 g

Panel cut-out: .......................................................... 70 x 29 mm

ENVIRONMENT:....................................Operating temperature: 0 to 40 ºC (32 to 122 ºF)

.................................................................Storage temperature: -20 to 60 ºC (-4 to 140 ºF)

....................................................................Relative humidity: 20 to 85 % non-condensing

CASE:.........................Polycarbonate UL94 V-2; Protection: Front panel: IP65, Box: IP42

............................................................................................. Suitable wiring: Up to 4,0 mm²

DIGITAL COMMUNICATION: ........................RS-485, RTU MODBUS protocol (optional)

Serial interface not isolated from input circuitry.

Serial interface isolated from input circuitry, except in 24 V powered model.

INSTALLATION

It is important to follow the recommendations below:

•

Signal wires should be installed in grounded conduits and away from power or

contactor wires.

•

The instrument should have its own power supply wires that should not be shared

with electrical motors, coils, contactors, etc.

•

Installing RC filters (47 R and 100 nF, series combination) is strongly

recommended at contactor coils or any other inductor.

•

Use protection devices like circuit breakers and fuses.

ELECTRICAL WIRING

Figure 1 below shows the controller connections to sensor, mains and outputs.

Figure 1 – N323R terminals

OPERATION

The controller requires the internal parameters to be configured according to the

intended use for the instrument. The parameters are organized in 4 groups or levels:

Level Function

0 Temperature measurement

1 Setpoint Adjustment

2 Configuration

3 Calibration

Upon power-up, the N323R display shows for 1 second its firmware version. This

information is useful when consulting the factory.

Then, the temperature measured by the sensor is shown on the display. This is the

parameter level 0 (temperature measurement level).

To access level 1, press for 1 second until the “SP

SPSP

SP” message shows up. Pressing

again to go back to level 0.

To access level 2 of paramenters, press for 2 seconds until the “uNT

uNTuNT

uNT” message is

shown. Release the key to remain in this level. Each new pressing on the key

will advance to the next 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 A parameter configuration is saved when the

key is pressed to

advance to the next parameter in the cycle. The configuration is stored

in a non-volatile memory, retaining its value when the controller is de-

energized.

2 If no keyboard activity is detected for over 20 seconds, the controller

saves the current parameter value and returns to the measurement

level.

3. While in the temperature measurement level, a momentary pressing on

the

key will show the Probe 2 temperature (evaporator temperature)

Level 1 – Setpoint Adjustment

In this level only the Setpoint (SP

SPSP

SP) parameters are available, alternating the names with

their respective values. Adjust the desired temperature for each setpoint clicking on the

and

keys.

SPSP

Set Point

Case of coldroom temperate adjustment. SP

SPSP

SP value is limited to the

values programmed in SPL

SPLSPL

SPL and SPk

SPk SPk

SPk in the programming level

(Parameter configuration, level 2).

Level 2 – Configuration – Parameters configuration Level

Contains the configuration parameters to be defined by the user, according to the

system’s requirements. Use and keys to set the value. The display alternates

the parameter name and respective value.

Unt

UntUnt

Unt

Unit

Temperature Unit. Selects display indication for degrees Celsius or

Fahrenheit

0 Temperature Celsius. (factory default)

1 Temperature in degrees Fahrenheit.

Of1

Of1Of1

Of1

Offset

Probe 1

Probe 1 Offset - 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).

Range: ± 0.1 to 10.0 degrees.

Of2

Of2Of2

Of2

Offset

sensor 2

Probe 2 Offset - 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).

Range: ± 0.1 to 10.0 degrees.

Spl

SplSpl

Spl

SP Low Limit

SP Low Limit - Lower range for SP

SPSP

SP. SPL

SPL SPL

SPL must be programmed with a

lower value than spK

spKspK

spK.

spK

spKspK

spK

SP High Limit

SP High Limit - Upper range for SP

SPSP

SP. S

SPx

Px Px

Px must be greater than spl

splspl

spl.

Kys

KysKys

Kys

Histeresis

OUTPUT 1 Hysteresis: defines the differential range between the

temperature value at which the OUTPUT is turned on and the value at

which it is turned off. In degrees.

(nt

(nt(nt

(nt

Control

Defines the output position for the refrigeration relay.

0 Refrigeration at OUTPUT1 / Defrost at OUTPUT2. (factory default)

1 Refrigeration at OUTPUT2 / Defrost at OUTPUT1.

Dly

DlyDly

Dly

Delay

Delay time to start control. Upon power-on, control OUTPUT 1 is kept off

until the time programmed in dly

dlydly

dly is elapsed. Its usage is intended to

prevent multiple compressors to start simultaneously after the turn-on of

a system with several controllers. Value in seconds, 0 to 250 s.

0nt

0nt0nt

0nt

on time

On time - Defines the minimum on time for refrigeration output. Once

turned on, OUTPUT 1 remains so for at least the time programmed in

ont

ontont

ont. This parameter is intended for refrigeration systems where

increased compressor life is desired. Value in seconds, 0 to 999 s.

0ft

0ft0ft

0ft

Off time

Off time - Defines the minimum off time for control OUTPUT 1. Once

OUTPUT 1 is turned off, it remains so for at least the time programmed

in oft

oftoft

oft. This parameter is intended for refrigeration systems where

longer compressor life is desired. Value in seconds, 0 to 999 s.

df1

df1df1

df1

Defrost

Interval

Interval time between defrost cycles. Adjustable from 0 to 999s.

During this time, the defrost output remains off.

df1= 0

df1= 0df1= 0

df1= 0

disables this function (no defrost cycles)

Dft

DftDft

Dft

Defrost time

Defrost duration. Interval time during which the defrost output remains

on.

Value in minutes, 1 to 999.

df(

df(df(

df(

defrost

Compressor

Compressor output behavior during the defrost cycle:

0 Always off;

1 Always on ;

2 Compressor output works normally, turning on and off to maintain

the temperature.

1 2

Summary of Contents

Page 1 - OPERATION

TEMPERATURE CONTROLLER N323R OPERATING MANUAL V1.7x Man 5001283 The N323R is a Refrigeration controller designed to control the temperat

Page 2 - PRODUCT IDENTIFICATION

DfsDfsDfsDfs Temperature for finalizing the defrost clycle – evaporator temperature value as measured by sensor 2 which terminates

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