Pego NEXUS P20 User And Maintenance Manual
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Pego NEXUS P20 User And Maintenance Manual

Driver for on/off electronic expansion valve
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NEXUS P20
Driver for ON/OFF electronic expansion valve
User and maintenance manual
ENGLISH
READ AND KEEP
Rel. 1
REV. 01-23
ELECTRICAL BOARDS FOR REFRIGERATING INSTALLATIONS
ENG

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Summary of Contents for Pego NEXUS P20

  • Page 1 NEXUS P20 Driver for ON/OFF electronic expansion valve User and maintenance manual ENGLISH READ AND KEEP Rel. 1 REV. 01-23 ELECTRICAL BOARDS FOR REFRIGERATING INSTALLATIONS...

  • Page 2: Table Of Contents

    CONTENTS INTRODUCTION CHAP. 1 Page 3 General Page 3 Product identification codes Page 4 Overall dimensions Page 4 Identification data INSTALLATION CHAP. 2 Page 5 General warnings for the installer Page 6 Mechanical fixing TECHNICAL FEATURES CHAP. 3 Page 7 Technical features WARRANTY TERMS CHAP.

  • Page 3: General

    NEXUS P20 CHAPTER 1: INTRODUCTION GENERAL DESCRIPTION: The NEXUSP20 is an electronic regulator for controlling the ON/OFF electronic expansion valve with 230/110/24 VAC or 24 VDC coil, with integrated connectivity functions through the myPego app. It manages the most common ON/OFF electronic expansion valves and integrates evaporator superheat management.
  • Page 4 NEXUS P20 OVERALL DIMENSIONS Dimensions in mm. IDENTIFICATION DATA The device described in this manual has a plate on one side bearing the identification data: • Name of Manufacturer • Code and model of the device • Serial number • Date of manufacture •...

  • Page 5: Mechanical Fixing

    NEXUS P20 CHAPTER 2: INSTALLATION GENERAL WARNINGS FOR THE INSTALLER 1. Install the device in places that respect its degree of protection. 2. Avoid using multi-pole cables with conductors connected to inductive and power conductors and signal conductors like sensors and digital inputs.

  • Page 6: Technical Features

    NEXUS P20 CHAPTER 3: TECHNICAL FEATURES TECHNICAL FEATURES Power supply 24 V~  10% 50-60Hz Main Voltage Max power consumption (electronic control only) ~ 7 VA Climatic conditions Operating temperature -5T50°C <90% R.H. non-condensing Storage temperature -10T70°C <90% R.H. non-condensing...

  • Page 7: Warranty Terms

    The intervention service in warranty can be refused when the equipment is modified or transformed. Under no circumstances Pego S.r.l. will be liable for any loss of data and information, costs of goods or substitute services, damage to property, people or animals, loss of sales...

  • Page 8: Display Description

    NEXUS P20 CHAPTER 5: DATA PROGRAMMING DISPLAY DESCRIPTION ENABLING ICON Led OFF = Enable input OFF (see In1/2/3 configuration) Led ON = Enable input ON (see In1/2/3 configuration) EEV OUTPUT STATUS ICON Led OFF = Valve closed Led ON = Valve open...

  • Page 9: Mypego App Interface

    NEXUS P20 MYPEGO APP INTERFACE The myPego app is the official Pego application for the control and supervision of NEXUS line instruments. It is available for free on the App Store and Google Play Store. Direct connection to the device via Bluetooth BLE;...
  • Page 10 Note: If the icon is grey, it may be necessary to set the date and time correctly on the instrument (parameters Hr, min, Yr, Mo, dy). NEXUS P20 instrument status Once logged in (via Bluetooth if it’s a nearby instrument or via Cloud if it’s a remote instrument) the NEXUSP20 status page opens.
  • Page 11 NEXUS P20 Enable input Defrost input Valve is open Current superheating Superheating setpoint Adjustment information Output status Input status Menu bar By touching the keys on the bottom bar it’s possible to access the other configuration pages: - Info page...

  • Page 12: Connections Setup

    NEXUS P20 - Parameters page Level selection: tap to change parameter level Parameter identifier Parameter description Parameter value: touch to modify (only with cCL=2) - Cloud page Allows configuration connection to the cloud and the network settings (see the Chapter Connections setup).
  • Page 13 NEXUS P20 To connect the NEXUS instrument to the internet via Wi-Fi or ethernet, do the following: 1) Download the myPego app from the Google/Apple store and install it on a smartphone/tablet. 2) Activate Bluetooth on the NEXUS instrument with the dedicated activation key. The flashing icon activates.
  • Page 14 NEXUS P20 8) By clicking “Ok” in the previous point, the Login page opens. If already registered, enter the registration e-mail and password and click Login. Otherwise click "Sign in" to make the first registration. 9) If you are registering for the first time, please enter a valid e-mail address and password.
  • Page 15 NEXUS P20 12) Enter your payment details (only the methods provided in the app are available). The charge will take place only after the trial period and it is possible to interrupt the renewal of the subscription at any time.
  • Page 16 NEXUS. 17) If the Cloud connection was configured (see point 13), after a few moments the icon is activated to signal that the device is correctly sending data to the Pego Cloud. USER AND MAINTENANCE MANUAL Pag. 16...

  • Page 17: Instrument Sharing

    NEXUS P20 INSTRUMENT SHARING 5.2.2 The "Instrument Sharing" function allows you to share the NEXUS with other users (up to 3) even if they are not subscribers (it’s sufficient that each user has their own account). Sharing users: receive alarms and notifications.

  • Page 18: Web Interface / Http Access

    = active registrations For further information, refer to the dedicated manual to be requested from Pego. WEB SERVER Type the local IP address of the connected instrument in the address bar of the web browser: the access page appears. Access to the NEXUS homepage is subject to access control using a username and password.
  • Page 19 NEXUS P20 The web interface consists of a few fixed sections: ▪ left: page navigation menu. ▪ above: page name, serial number and type of connected user. ▪ right: page content. - Main page Page navigation Current page Current superheat (and...
  • Page 20 NEXUS P20 - I/O (Inputs / Outputs) Input/output Input / output description Input/output status terminal PIN (digital or analog) If digital: - green: input / output active - grey: input / output not active If analog: the analog input or output value is displayed.
  • Page 21 NEXUS P20 Increases decreases Parameter code Parameter description Current value value - Setup On the "Setup” page it’s possible to configure the language of the webserver. - Info USER AND MAINTENANCE MANUAL Rev. 01-23 Pag. 21...

  • Page 22: Remote Console Interface (Optional)

    DOWN KEY Decrease values / Scroll down parameters  STAND BY KEY The NEXUS P20 instrument cannot be paused with this key but only by removing the enabling from the digital input or from LAN. SET KEY  View the set point.

  • Page 23: Remote Console Key Combination (Optional)

    NEXUS P20 "ALARM PRESENT" ICON  Led OFF = No alarm present. Led ON = Alarm triggered and then reset. Flashing LED = Alarm present. REMOTE CONSOLE KEY COMBINATION (OPTIONAL) 5.4.2 EXIT PROGRAMMING If pressed simultaneously for more than 3 seconds inside any programming menu, they save the settings made by exiting the menu itself.

  • Page 24: Esh Set Point Setting And Display

    NEXUS P20 QUICK VIEW MENU (READ ONLY) If pressed simultaneously for more than 3 seconds, they allow access to the quick display menu. When entering the menu, a confirmation BEEP is generated. Within this menu, the up and down arrows allow you to scroll through the various parameters.

  • Page 25: First Level Programming

    NEXUS P20 FIRST LEVEL PROGRAMMING (Installer level) Via the myPego app: 1. Open the myPego app and connect to the instrument called "NEXUSP20" via Bluetooth or via cloud. 2. Touch the "Parameters" button in the bottom toolbar. 3. Consult / modify the parameters of the desired level.
  • Page 26 NEXUS P20 PAR. MEANING VALUES DEFAULT 1 = (tS4) Probe visualization (S4) Suction temperature. 2 = (tS5) Probe display (S5) Evaporation temperature. Visualization on the main display 3 = (PS5) Probe display (S5) Evaporation pressure. 4 = (tSH) Superheating temperature display.
  • Page 27 NEXUS P20 PAR. MEANING VALUES DEFAULT Via the myPego app: Send the value "291" to restore the default parameters. Setting the default parameters With remote console: Position on the dEF parameter and press all the keys for 10 seconds to restore the default parameters.
  • Page 28 NEXUS P20 PAR. MEANING VALUES DEFAULT 11 = R449A 0 = R404 12 = R290 1 = R134 13 = R32 2 = R22 14 = R448A 3 = R407A 15 = R452A Type of refrigerant GAS used. 4 = R407F...
  • Page 29 NEXUS P20 PAR. MEANING VALUES DEFAULT LSH threshold (low superheat temperature). Superheat values that are too low can cause return of the liquid to the compressor, or extreme oscillations. 0,0 ÷ Set SH °C 2,0 °C Below the LSH threshold, the ELS protection forces the PID control to close the valve more quickly and bring the value back up to the superheat setpoint.
  • Page 30 NEXUS P20 PAR. MEANING VALUES DEFAULT threshold (minimum saturated evaporation temperature in relation to the S5 sensor) This represents the minimum saturated evaporation pressure below which the LOP protection is activated. When LOP -45°C ÷ (MOP-1) -45°C protection is enabled, the control opens to prevent the compressor from stopping due to low pressure (mechanical pressure switch).

  • Page 31: Valve Management (Eev Parameter)

    NEXUS P20 Valve management (EEV parameter) 5.9.1 Setting the EEV parameter from 1 to 5 loads the default values in the ESH, EPb, EtI, Etd, LSH, ELS, MOP, EMO, LOP, ELO parameters. In this case the controller acts as a superheat regulator, based on the value read by the connected pressure/temperature probes.

  • Page 32: Quick View Menu (Read-Only)

    NEXUS P20 QUICK VIEW MENU (READ-ONLY) 5.10 During the start-up of the system it may be useful to simply check the reading of the various probes or of some values to verify or optimize the process. To access these values: Via the myPego app: 1.

  • Page 33: Password Function

    EXPORT / IMPORT PARAMETERS 5.15 It’s possible to export / import the parameters set in the NEXUS P20 via the USB port on the board. To do this you need the optional remote display. 1) Insert the USB memory into the slot on the board.

  • Page 34: Telenet Monitoring/Supervision System

    NEXUS P20 CHAPTER 6: OPTIONS TELENET MONITORING/SUPERVISION SYSTEM To connect the electrical panel to a TeleNET network, follow the diagram below. Refer to the TeleNET user manual for instrument configuration. IMPORTANT: During the configuration, under "Module" select "PEV-PULSE Instrument". NETWORK CONFIGURATION WITH MODBUS-RTU PROTOCOL Connect the board to a RS485 network with Modbus-RTU protocol with reference to the diagram below.

  • Page 35: Diagnostics

    NEXUS P20 CHAPTER 7: DIAGNOSTICS DIAGNOSTICS In the event of any anomalies, the NEXUS P20 controller warns the operator through alarm codes displayed on the remote display or with notification via the myPego app. CODE POSSIBLE CAUSE OPERATION TO BE PERFORMED •...
  • Page 36 THIS DECLARATION OF CONFORMITY IS ISSUED UNDER THE EXCLUSIVE RESPONSIBILITY OF THE MANUFACTURER: PEGO S.r.l. a socio unico - Via Piacentina 6/b, 45030 Occhiobello (RO) – Italy – Società soggetta all’attività di direzione e coordinamento di Castel S.r.l. DENOMINAZIONE DEL PRODOTTO IN OGGETTO / DENOMINATION OF THE PRODUCT IN OBJECT MOD.:...

  • Page 37: Connection Diagram

    NEXUS P20 CONNECTION DIAGRAM USER AND MAINTENANCE MANUAL Rev. 01-23 Pag. 37...

  • Page 38: Layout And Description Of Sensors

    NEXUS P20 LAYOUT AND DESCRIPTION OF SENSORS Evaporator Condenser Suction Temperature Evaporation Pressure Compressor USER AND MAINTENANCE MANUAL Pag. 38 Rev. 01-23...
  • Page 39 Phone +39 0425 762906 e-mail: info@pego.it – www.pego.it TECHNICAL ASSISTANCE Phone +39 0425 762906 e-mail: tecnico@pego.it Distributor: PEGO s.r.l. reserves the right to make amendments to this user manual at any moment. USER AND MAINTENANCE MANUAL Pag. 39 Rev. 01-23...

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