DIGITEL NEWEL 3 Universal Multi-Function Controller Instructions

DIGITEL NEWEL 3 Universal Multi-Function Controller

INTRODUCTION

NEWEL 3 represents a new generation of control systems for refrigeration installations. As the fruit of close collaboration between DIGITEL and professionals in the refrigeration industry, NEWEL 3 incorporates all the advantages of the NEWEL and NEWEL2 range, well-established on the market since 1990, and delivers numerous improvements in terms of flexibility, functional capability and reliability.

BASIC CONCEPT

The NEWEL 3 system is comprised of one or more control units, which are completely independent of each other. The range consists of universal DC24 modules mounted in two different types of housing:

• DC24D: In DIN housing
• DC24E: In a plug-in housing

The DC24 modules will fulfil instrument, monitoring and control functions for the regulating devices concerned (solenoid valve, defrosting system, fans, compressors, etc.).
These modules can assume an extremely wide variety of functions, specifically:

• control functions for cooling units
• management of the electronic expansion valve
• humidity control
• management of compressor units
• management of condensers
• other functions for specific applications (storage of fruits and vegetables, regulation of O2 – CO2, etc.)

The module can be programmed using the keys on the front panel of the housing, or using a computer, if the system is equipped with a remote management function. The integral display will indicate the variables, measured by connected probes, and is used for the programming of parameters.

PRODUCT RANGE

The following table summarizes the functions and characteristics of the various DC24 modules at a glance.

The main differences between the two universal modules are summarized in the following table:

DC24E / EE

• The module is embedded into the front panel of a cabinet, incorporated into a display window, etc.

DC24D / DE

• The module is mounted on DIN rails
• The module may be fitted in a cascade arrangement with other modules to enlarge the in-and-outputs for many applications

MODULE DISPLAY

We suggest mounting the modules the way the display will be seen straight or from below. The best result of the display is obtained in the following angles .

PROGRAMMING OF PARAMETERS USING KEYS

Figure 1.5.1 shows an example of the programming diagram applied for the parameterization of modules using the programming keys. The appropriate version of this diagram will be found in the corresponding user manual for the mode of operation which is to be assigned to the programmed module. For example, for the parameterization of a module for the management of a cooling unit, the diagram found in the chapter 3 Management of cooling units should be applied.

t1 and t1+t2

|  | 0| 999|
t3| 3| Lower setting limit of setpoint (°C)|  | -999| 999|
t4| 3| Upper setting limit of setpoint (°C)|  | -999| 999|
t5| 2| Lower alarm limit (°C)|  | -999| 999|
t6| 2| Upper alarm limit (°C)|  | -999| 999|
t7| 2| Alarm delay (min)|  | 0| 999|
t8| 2| Setpoint offset (°C)|

Parameter applied only if v1 = 3

| -999| 999|
t9| 2| Start of setpoint offset (HH:M)| 0| 240|
t10| 2| End of setpoint offset (HH:M)| 0| 240|
t11| 3| Minimum operating time (min)| 0| 999|
t12| 3| Minimum resting time (min)| 0| 999|
Fans|

v1

|

2

| Operation of fan

0 = tripped during defrosting 1 = continuously in-service 2 = controlled by valve

3 = controlled by evaporator probe

|  |

0

|

3

|
---|---|---|---|---|---|---|---
v2| 2| Fan start-up temperature (°C)| v1 = 3| -999| 999|
v3| 2| Fan trip temperature (°C)| v1 = 3| -999| 999|
v4| 3| Analogue output – temperature corresponding to 0% (°C)|  | -999| 999|
v5| 3| Analogue output – temperature corresponding to 100% (°C)|  | -999| 999|
Contacts C1, C2|

F1

|

3

| Operation of contact C1

0 = alarm upon closing 3 = none 1 = alarm upon opening

4 = setpoint offset upon closing

2 = shutdown of unit 5 = door contact

|  |

0

|

5

|
---|---|---|---|---|---|---|---
F2| 2| Alarm delay (min)| F1 = 0, 1, 5| 0| 999|

F3

|

2

| 0 = deactivated

1 – 99.9 = delay in the start-up of the compressor/solenoid valve after door closure

|  |

0

|

999

|

PROGRAMMING OF PARAMETERS

• To access parameterization mode, press on for 3 seconds.
• The display will read PAS, then 0. This means that you are required to enter a password (modules are delivered with all three passwords set to 0)
  • There are three levels of password: the first level, for users, will allow the modification of the setpoint and clock setting, the second level – which is intended for the use of the operating engineer – will provide access to virtually all functions, while the third level, which is reserved for the installer, will allow the complete configuration of the installation.
• Enter your password by pressing on to increase its value and to decrease its value, then on to validate. If the password is accepted, the display will indicate the symbol of the first parameter for 1 second, then its value. If the password is incorrect, repeat the entry operation.
• Press on  to increase and to decrease the value of a parameter o To change the value more rapidly, hold down one of these keys for 3 seconds or more. The display will scroll with increasing speed. As the desired value is approached, release the key, then press a few more times, but briefly, to achieve the exact value.
• Press on to validate the parameter concerned, and then move on to the next parameter.
• To move on to the next parameter without validating, press on . The display will indicate the symbol of the next parameter for 1 second, then its value.
• To return to the previous parameter, hold down then press on until the required parameter is shown.
• Parameters with similar functions will be combined in groups described as menus. Symbols for parameters in the same menu will have the same initial letter. To move from one menu to another, press on for 3 seconds. The various menus will scroll down. Release the key once you have reached the required menu.
• To save changes and quit programming mode, press on . If no saving operation is completed, parameters will be restored to their previous values.
• If no key is pressed for five minutes, the device will automatically return to normal mode, will delete all changes and restore the previous values of parameters.

Special operations:

• * In “cooling unit” mode:

• It is possible to initiate defrosting by means of an override, by pressing on and keys simultaneously for 5 seconds.
• By pressing and keys simultaneously for 5 seconds it is possible to force the “Day” mode (switch on the lights and mount the curtains)
• Pressing and keys simultaneously for 5 seconds will cancel the previously forced “Day” mode.
• It is also possible to acknowledge an alarm by pressing on for 3 seconds.
• By pressing the and , keys simultaneously, you will access the programming mode for the basic configuration (see chapter 1.5.2)

Temporary display

• During normal operation, the temporary display of various measured variables and the status of various inputs will be possible.
• In “cooling unit” mode, pressing briefly on the key will display the ambient temperature “tA”, while a second depression will call up the evaporator temperature “tb”, then the probe “tC”, the status of the contact “C1” and the status of the contact “C2”. The variable selected will be displayed for 1 minute, and then the display will return to its normal status, determined by the value of the parameter [r2].
• On the DC24DE and DI24EE modules (electronic expansion valve), it is also possible to display “P” – the suction pressure, “S” – overheating, and “o” – the degree of opening of the electronic expansion valve.
• In “pressure regulation” mode, successive depressions of the key will call up the display of the following values: “Pb” – pressure in bar, “Pt” – pressure in °C, “S1” – status of safety chain n° 1, “S2” – status of safety chain n° 2, “S3” – status of safety chain n° 3, “C1” – status of contact C1, “C” – status of contact C2.

PROGRAMMING OF BASIC CONFIGURATION

When a module is brought into service, the basic configuration for that module (parameter [r1]) must firstly be configured using the method described below. This configuration is comprised of a number of parameters, which will determine the subsequent operation of the module. Specifically, this configuration will determine whether the module is to function as a regulating device for cooling units, or as a regulating device for a condenser, compressors, humidity, etc. Once these variables have been correctly programmed, active parameters in this mode will be programmed by default, and the module will be operational thereafter. Attention!!! Before connecting the inputs and outputs, make sure the module is operating normally and that all the parameters have values that match to the configuration, the sensor and probe types connected to it. See chapter 1.9 Important remarks.

• To access parameterization mode for the basic configuration, hold down the and keys simultaneously for 3 seconds.
• The remainder of the programming method is identical to that described above.
• To save changes and quit parameterization mode, press on for 3 seconds.

The following example shows a compressor regulation function with a display in °C and a refrigerant R404A.

Symbol

| Access level|

Function

|

Comment

| Min. value| Max. value| Variable to be

programmed

---|---|---|---|---|---|---
PAS| 0| Password|  | 0| 999|

R1

|

3

| Operating mode

0 = cooling unit 1 = Compressor management

2 = Universal regulation 3 = Monitoring

4 = Management of evaporators 2, 3, etc.

|  |

0

|

4

|

1

cF1

|

3

| Slave adresse

0 = Pilote compressor 1-3        1 = compressor 4 – 6

2 = compressor 7 – 9              3 = compressor 10 – 12

|

r1 = 1

|

0

|

3

|

0

---|---|---|---|---|---|---
cF2| 3| Type of regulation

0 = low pressure 1 = high pressure

| r1 = 1| 0| 1| 0
cF3| 3| Display unit

0 = bar 1 = °C

| r1 = 1| 0| 1| 1

cF4

|

3

| Refrigerant

1 = R12 2 = R22 3 = R134A 4 = R502 5 = R500

6 = MP39 7 = HP80 8 = R404A 9 = R717 (NH3)

10 = chilled water 11 = R407 (fluid) 12 = R407 (gas/fluid) 13 = R23

|

r1 = 1

|

1

|

13

|

8

Our module will then be ready for operation with non-default parameters. If no key is pressed in programming mode for five minutes, the device will automatically return to normal mode, will delete all changes and restore the previous values of parameters.

PASSWORDS

NEWEL3 has passwords at three hierarchical levels. The first level authorizes access to an extremely limited number of parameters which can be modified by the owner of the installation who, in general, will not have the necessary expertise for the modification of sensitive data. The second level password will authorize access to all parameters, with the exception of the level 3 password, and will be used by qualified engineers operating on the installation. The option for the changing of passwords on the first and second levels will be available. The level three password authorizes access to all parameters. In principle, this level of password will only be used for the retrieval or modification of a second level password, in case of the loss or inadvertent modification of the latter. Where a password is set to 0000, access to the corresponding hierarchical level will be unrestricted.

MONITORING FUNCTIONS

The device will undertake the continuous monitoring of the installation, and will trigger an alarm in case of the detection of an anomaly. The codes, dates and times of the 5 most recent anomalies will be stored as parameters [A1C], [A1d], [A1b], [A1H], [A1M], [A2C], etc. A schedule of alarm codes and their meanings is included at the end of the programming diagram.

• By pressing on the key for 3 seconds, the alarm will be acknowledged and the alarm contact will open..

REMOTE MONITORING, REMOTE MANAGEMENT

NEWEL3 may be connected to a remote monitoring system via a DC58 central unit. A device of this type will allow the installer, or any other authorized person, to retrieve information from modules remotely via an internet TCP connection. Communications are managed by a computer (IBM-compatible PC) equipped with “TelesWin” software, which is sold by our company. Full data can be accessed on the current status of the installation (temperatures, humidity, status of inputs and outputs). It will also be possible to undertake the remote modification of all parameters, to instruct an override defrost cycle, shutdown or override operation of a unit, etc. The central remote monitoring unit also has the capability for the cyclical memorization of all key data concerning the installation (temperatures, humidity, status of inputs and outputs, etc.). The frequency of recording is programmable. In case of any anomaly or failure, the central unit will automatically connect to your computer, in order to allow the nature of the fault concerned to be displayed on screen. The priority level of each anomaly will be programmable (see chapter 12. Remote Monitoring & remote management). 600 modules may be connected to a single remote monitoring unit. Further details of remote management may be obtained in chapter 12. Remote Monitoring & remote management

WEEKLY SCHEDULE

An installation with remote monitoring may be equipped with the “Weekly schedule” option (see chapter 12 Remote Monitoring & remote management). For installations of the supermarket type, this option will allow the programming of the weekly cycle of store openings and closures, together with the automatic modification of the operation of the installation during periods of closure. These modifications will only affect slave units on which the parameter “Management of unit by weekly schedule” has been set to “Yes” (in the “Calendar” menu). Depending upon the mode of operation of slave units, modifications to the functioning of the latter during hours of closure may take various forms. These may involve the complete shutdown of the unit, a set point offset, lighting and night blind controls, modification to the processing of alarms, etc. (see user manual for the corresponding mode of operation).

IMPORTANT REMARKS

• Do not ever invert L1 and N on the supply of the DC24 modules. See following drawing:

• The modules are delivered with factory settings set for the inactive “cooling unit” mode. The display shows “OFF”. Every input and output is inactivated. Before connecting the module and activating it, every parameter shall be set for the planned configuration and use. Wrong parameters can cause serious dysfunction and deal important damage to the installation

  • Devices should not be fitted to elements which are affected by strong vibrations.¨
  • Devices should not be positioned in close proximity to a strong source of electromagnetic fields and interference (power cables, speed variator, etc.).
  • The device must not be exposed to moisture.
  • The contacts C1 and C2, together with safety contacts for the management of compressors, are zero-potential contacts. No exterior voltage must be applied to these inputs.

• All operations (connection of wires, plugging and unplugging of connectors, etc.) must be completed with the device isolated from supply. All operations must be undertaken by qualified personnel.

• Particular attention must be paid to the protection of the communication bus. This must not be exposed to overvoltage associated with connection errors or any induction associated with the proximity of a high-current conductor.

• For the connection of the communication bus, we recommend a cable of the CAT5 type, or a special RS485 bus cable. In all cases, a single pair of twisted conductors should be used. Any other wires should be left unconnected.

• The voltage applied to relay contacts during insulation tests must not exceed 1000 V.

  • All electrical connections must be checked prior to any connection to supply. Under no circumstances must voltages exceed the values specified in the technical characteristics.
  • In order to ensure compliance with protection standards for electromagnetic interference and extend the service life of relay contacts, it is recommended that RC filters should be installed in parallel with all inductive loads (coils of contactors, solenoid valves, etc.). Connections between the RC filter and the coil concerned should be as short as possible.
  • We would recommend the connection of probes and sensors using shielded cables. Shielding must be connected to ground on the electric switchboard side, and unconnected at the other end. Severe electromagnetic interference may influence measurements and result in substantial measuring errors.
  • Devices must be cleaned using a dry cloth.
  • Any use of devices which is not compliant with the provisions of the present document may result in the poor operation or destruction of the devices concerned, and will invalidate the guarantee.

• No objects (screwdrivers etc.) must be inserted into the ventilation slots. The circuit may be damaged as a
  result, and may no longer operate correctly.

  • Plans, drawings, descriptions and circuit diagrams must not be reproduced or disclosed to third parties without the written permission of DIGITEL SA, who shall retain ownership thereof. Sketches of circuit arrangements will be classified as drafts, for which we can assume no liability.
  • General circuit diagrams prepared by ourselves will be adapted by the concession-holder concerned in accordance with local regulations. Any deterioration of our equipment associated with non-regulation use will be excluded from the terms of the guarantee, and we can accept no liability for any resulting damage to equipment which is connected to our modules. We can accept no liability for any loss or damage associated with the breakdown of devices

TECHNICAL DATA

50-60 Hz
Maximum input power| 4W| 3W
Protection rating|  | 1| 1
Contamination rating|  | 2| 2
Overvoltage category|  | II| II
Conditions of use| Temperature| 0-40°C| 0-40°C
Humidity| 0-80% (without condensation)| 0-80% (without condensation)
Breaking capacity of relays

outputs.-(20-21, 22-23, 24-25 on DC24D & DC24E)

| Resistive load| 10A 250 V ac.| 3A 250 V ac.
Inductive load| 6A 250 V ac.| 3A 250 V ac.
Breaking capacity of triacs outputs (20-21on DC24DE & DC24EE)| Resistive load| 1A 250 V ac.| 1A 250 V ac.
Inductive load| 1A 250 V ac.| 1A 250 V ac.
Minimal current of triac output (20-21 on DC24DE &

DC24EE

|  |

11mA

|

11mA

Clock| Reserve operating margin| 4 days| 4 days
Input 4-20mA| Range of measurement| 4 – 20 mA| 4 – 20 mA
Input 0-10V| Range of measurement| 0 – 10 V| 0 – 10 V

Available temperature probe type

VIEW OF HOUSING AND PERFORATION PLANE

DC24D

DC24E

DC10A

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