Carel E2V S0 Series User Manual
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Carel E2V S0 Series User Manual

Carel E2V S0 Series User Manual

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Summary of Contents for Carel E2V S0 Series

  • Page 2 Guide to the EEV system User manual LEGGI E CON SERVA QU EST E I ST RU Z I ON I READ AN D SAV E T H ESE I N ST RU CT I ON S...
  • Page 4 User manual...
  • Page 5 CAREL, its employees or subsidiaries be liable for any lost earnings or sales, losses of data and information, costs of replacement goods or services, damage to things or people, downtime or any direct, indirect, incidental, actual, punitive,...

  • Page 6: Table Of Contents

    Contents Selecting the valve...............................................7 Installing the valve...............................................7 Diagram of the refrigerant circuit............................................7 In-line filter ....................................................8 Flow of refrigerant and spatial orientation of the valve.......................................8 Welding ......................................................8 Positioning the probes..............................................9 Ideal position of the probes ..............................................9 Positioning with external pressure probe........................................... 10 Positioning for reverse-cycle heat pumps (E V in bi-directional operation)...............................
  • Page 7 Code +030220811- rel. 1.0 – 26.04.2007...

  • Page 8: Selecting The Valve

    V– E V valve selection" manual +030220815, downloadable from www.carel.com. Alternatively, guided selection software is available on ksa.carel.com. Incorrect sizing may cause various problems. If the valve is undersized the performance of the system will be affected, as it will not be possible to reach the desired temperature and the superheat will generally be high or greater than the set point.

  • Page 9: In-Line Filter

    2.3 Flow of refrigerant and spatial orientation of the valve The recommended direction of connection (Figure 2.c) sees the inlet on the side of the valve; nonetheless, the CAREL E V valves are bi-directional up to the pressure differential specified on the instruction sheet.

  • Page 10: Positioning The Probes

    installation Observe the following warnings: • do not let water or other foreign bodies/fluids inside the valve: this would make it impossible to completely clean the parts inside; • preferably use the side fitting on the valve for the refrigerant inlet; •...

  • Page 11: Positioning With External Pressure Probe

    installation 3.2 Positioning with external pressure probe If there is the need to simplify the inspection and replacement of the pressure probe, or to share the reading of the probe between master and slave utilities (for multiplexed showcases with controllers that support this function), the pressure probe can be installed outside of the showcase and away from the temperature probe.

  • Page 12: Installing The Probes

    installation 4. Installing the probes NTC**HP** 4.1 Suction temperature probe The temperature probe must be selected based on the application. Showcases/cold rooms: NTC***HF** (with clamp) or NTC***HP**. Air-conditioners/chillers: NTC***WF** preferably in a socket, or NTC***HF** or NTC***HP**. NTC**HF** Fig. 4.b Fig.

  • Page 13: Evaporation Pressure Transducer

    In air-conditioners/above-zero chillers, where better measurement precision and a faster response is required, the NTC***WF** probe should be used, with installation in a socket. Good thermal coupling must be guaranteed between the socket and the probe, applying abundant conductive paste inside the socket.

  • Page 14: Electrical Connections

    installation Both types of transducers use the SPKC****** 3-wire cable with Packard co-moulded connector. The ratiometric transducer uses all and three wires, the 4-20 mA transducer only uses two (the green wire is not used). Each pressure transducer is supplied with a different range of measurement. The parameters corresponding to the minimum and maximum pressure of the transducer used then need to be set.

  • Page 15: Probe And Power Supply Connections

    installation 5.2 Probe and power supply connections Then complete the wiring of the driver, following the information provided on the instruction sheet supplied in the packaging. Connect the 24 V power supply, the optional battery module, the optional communication LAN (pLAN, tLAN or RS485), the alarm relay, if used, the digital input for enabling control, if used, and finally the temperature and pressure probes.
  • Page 16 installation Fig. 5.g Fig. 5.h Fig. 5.j Code +030220215- rel. 1.4 – 25.04.2007-...

  • Page 17: Electronic Valve Control Devices

    Models EVD0000400, EVD0000410, EVD0000420 can be configured to control different types of valves with stepper motor (CAREL, Sporlan, Alco, Danfoss). Models EVD0000430, EVD0000440, EVD0000450 on the other hand are pre-configured for CAREL valves only. All models of EVD400 are available in multiple packages (10 pcs), code EVD00004*1.

  • Page 18: Controllers With Built-In Driver

    6.2 Controllers with built-in driver Some specific CAREL controllers for showcases and cold rooms include the hardware and software for the management of electronic valves; these are programmed in different ways. Model MasterCase MasterCase 2 MPXPRO Code MGE000*020 MC200N0B10...

  • Page 19: Control Devices: Advanced Parameter Settings

    control 8. Control devices: advanced parameter settings The control of the electronic valve can be divided into two categories: superheat control with reference to the corresponding set point, and control of unit safety with protectors that are activated only if the pressure or temperature reach dangerous values that can be set by the user.

  • Page 20: Protection Function Control Parameters

    The use of the protectors is recommended, however this is at the user’s discretion. 8.3 Recommended parameters Below are the most suitable values of the parameters for each application and specifically for CAREL valves. If valves made by other manufacturers are used, the same recommended parameters can be used initially, modifying the “Proportional gain”...
  • Page 21 control With Perturbed SHOWCASES - COLD ROOMS Multiplexed compressor system on board Shset Superheat set point °C K prop PID: proportional gain PID: integration time PID: derivative time LowSH LowSH prot.: threshold °C LowSH Ti LowSH prot.: integration time -45 °C (LT) LOP prot.: threshold °C -25 °C (NT)
  • Page 22 control Plate Tube bundle Finned coil AIR-CONDITIONERS - CHILLERS evaporator evaporator evaporator SHset Superheat set point °C K prop PID: proportional gain PID: integration time PID: derivative time LowSH LowSH prot.: threshold °C LowSH Ti LowSH prot.: integration time LOP prot.: threshold °C LOP Ti LOP prot.: integration time...

  • Page 23: Start-Up

    control 9. Start-up When starting control for the first time, make sure that: the electronic valve opens and starts controlling when the start control signal is sent (from digital input, pLAN, tLAN or built-in controller); the valve position constantly follows the superheat value, opening or closing when the superheat increases or decreases;...
  • Page 24 control As concerns the control parameters, the following general indications can be used as a guide: Proportional gain (from 3 to 30) Increasing the proportional gain K increases the reaction speed of the valve and is recommended if the system is particularly perturbed or to make superheat control faster.

  • Page 25: Troubleshooting

    control 10. Troubleshooting The following table lists a series of situations of malfunctions that may occur when starting and operating the driver and the electronic valve. These cover the more common problems and provide an initial response to help resolve the fault.
  • Page 26 control PROBLEM CAUSE SOLUTION Check the controller condenser settings, giving the parameters “blander” values (e.g. increase the proportional band or increase the integration time). Note: the required stability involves a The condensing pressure swings variation within +/- 0.5 bar. If this is not effective or the settings cannot be changed, adopt electronic valve control parameters for perturbed systems (see paragraph 8.3) The superheat swings even with the...
  • Page 27 Check that and the valve remains closed the driver is in stand-alone mode. showcases only) CAREL reserves the right to make modifications or changes to its products without prior warning. Code +030220811- rel. 1.0 – 26.04.2007...
  • Page 29 Agency CAREL S.p.A. Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 Fax (+39) 049.9716600 http://www.carel.com - e-mail: carel@carel.com...

This manual is also suitable for:

E2v sf seriesE2v sm seriesE2v rb series

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