Инструкция на Cистемы управления Lennox серии Enertronic 2 для чиллеров

Текст инструкции

1. Стр. 1 OPERATING MANUAL

   Enertronic Control System 2 The integrated control system for Lennox chillers in the Ecologic and Seconscrew ranges Manufacturer Lennox Benelux B.V. Postbus 1028, 3860 BA NIJKERK Watergoorweg 87, 3861 MA NIJKERK Netherlands Tel.: ++31 (0)33-2471800 Fax: ++31 (0)33-2459220 8 EC 91 0005.REV.C.EN 1

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   PREFACE The Enertronic Control System 2 provides the functionality required to protect, control and operate your Lennox Ecologic or Seconscrew chiller. It has the ability to operate those processes that take place in your chiller to the best advantage, thus guaranteeing efficient operation…

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   VERSIONS The Enertronic Control System 2 is an independently operating control system which provides the same functionality for both the single circuit machine and the double circuit machine. This functionality can be subdivided into three main groups : -Safety functions -Control functions…

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   HARDWARE The hardware for the Enertronic Control System 2 consists of a programmable logic controller (PLC). This PLC collects information from the chiller in the form of digital (I or 0) and analog (0-10 volt and resistance) signals. The status of the digital inputs is indicated by LEDs (Light…

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   Figure 2 shows an overview of the control system for the double circu Output LEDs Serial interface Input LEDs Figure , Double circuit control system NOTE: over without cutting off the power may provoke damage to the hardware. according to the machine version and the options you have chosen. Function…

6. Стр. 8 3.4. Inputs and outputs of single circuit version equipped with scroll compressors

   This applies amongst others to machine types: WA-40E to WA-110E WW-45E to WW-130E WS-45E to WS-130E The outputs numbered 0 to 23 are located on the top of the control. The inputs are grouped on the bottom of the control, numbered 32 to 55 inclusive. The status of the respective input or output is…

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   Number Function 32 Starting command On 33 Contact for flow or pump switch On 34 Failure contact pump unit (optional) On 35 High pressure protection input On 36 Safety chain compressor 1 On 37 Safety chain compressor 2 * 38 Safety chain compressor 3 * 39 Safety chain condenser On Table 2, Numbering…

8. Стр. 10 Inputs and outputs of single circuit version equipped with a screw type

   compressor This applies amongst others to machine types: SC W 160E to SCSC S 160E to SCview there are differences because the machines are equipped with screw- pe compressors. 3.5.1. -type compressor Number LED indicator 0 * 1 * 2 * 3 n/a 4 On 5 * 16 * 17 * 18 -speed fan 1 * Control economiser *…

9. Стр. 11 3.5.2. Digital inputs of single circuit version equipped with a screw-type compressor

   Number Function LED indicator 32 Starting command On 33 Contact for flow or pump switch On 34 Failure contact pump unit (optional) On 35 High pressure protection input On 36 Motor overload protection compressor 1 On 37 Thermistor / phase sequential protection compressor On 38 Oil level protection…

10. Стр. 12 Inputs and outputs of double circuit version equipped with scroll compr

    This applies amongst others to machine types: WAWWWS- -230D -255D -255D In this case as well, the outputs, numbered from 0 to 55 inclusive, are on top of the control and the inputs, numbered 64 to119, are on the bottom. version. The tables below summarise the inputs and outputs used: 3.6.1. Number…

11. Стр. 13 3.6.2. Analog outputs of double circuit version equipped with scroll compressors

    Number Function LED indicator 48 Water control valve circuit 1 (0-10VDC, optional) n/a 49 Water control valve circuit 2 (0-10VDC, optional) n/a 50 Fan speed control circuit 1 (0-10VDC, optional) n/a 51 Fan speed control circuit 2 (0-10VDC, optional) n/a Table 8 , Numbering of analog outputs 3.6.3.…

12. Стр. 14 3.6.4. Analog inputs of double circuit version equipped with scroll compressors

    Number Function LED indicator 64 External setpoint adjustment (0-10VDC, optional) n/a 65 to 67 Not used n/a 68 Water inlet temperature sensor (Ion, optional) n/a 69 t to 71 Not used n/a 112 Low pressure transmitter circuit 1 n/a 113 High pressure transmitter circuit 1 n/a 114 Low pressure…

13. Стр. 15 3.7. Inputs and outputs of double circuit version equipped with screw-type

    compressors This applies amongst others to machine types: WA-285D to WA-430D SC-W 240D to SC-W 410D SC-S 240D to SC-S 410D The inputs and outputs are located as outlined for the previous version. But from a functional point of view there are differences because the machines are equipped with…

14. Стр. 16 3.7.2. Analog outputs of double circuit version equipped with screw-type compressors

    Number Function LED indicator 48 Water control valve circuit 1 (0-10VDC, optional) n/a 49 Water control valve circuit 2 (0-10VDC, optional) n/a 50 Fan speed control circuit 1 (0-10VDC, optional) n/a 51 Fan speed control circuit 2 (0-10VDC, optional) n/a Table 12, Numbering of analog outputs 3.7.3.…

15. Стр. 17 3.7.4. Analog inputs of double circuit version equipped with screw-type compressors

    Number Function LED indicator 64 External setpoint adjustment (0-10VDC, optional) n/a 65 to 67 Not used n/a 68 Water inlet temperature sensor (Ion, optional) n/a 69 t to 71 Not used n/a 112 Low pressure transmitter circuit 1 n/a 113 High pressure transmitter circuit 1 n/a 114 Low pressure…

16. Стр. 18 3.8. Transfer function of analog sensors

    In some cases (e.g. when troubleshooting) the transfer function of the analog measurement transducer must be known. This is as follows for the low and high pressure transmitters: Figure 3, Transfer function of high pressure sensor FFigure 4, Transfer function of low pressure sensor Note: Pe =…

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    SAFETY FEATURES The Enertronic Control System 2 has extensive safety features for the different components used in your Lennox chiller. The safety features can be divided into four main groups, i.e.: -Safety features for the evaporator -Safety features for the compressors -Safety features for the…

18. Стр. 20 4.1.1. Transmission pump of evaporator

    The transmission pump in the hydraulic circuit will be switched on at ambient temperatures below 5°C. If a water/glycol mixture is used, the pump will be switched on at a lower ambient temperature, according to the glycol content. The switch-on point used for a given glycol content can be found by…

19. Стр. 21 °C

    -2 -4 -6 -8 -10 Figure 6 shows the relationship between the glycol percentage and the disengaging of all cooling capacity as well as the engaging of the evaporator heating and the heater unit in the buffer tank (optional). % glycol Figure 6,Disengaging in the event of low water outlet temperature…

20. Стр. 22 4.2. Safety features for the compressor(s)

    The compressors in your Lennox chiller can be protected in different ways against external or undesired operating conditions. The possible safety features and their characteristics are shown in the following table. Cause Result Limit values Failure? Reset required? Engaging or interruption of the…

21. Стр. 23 4.3. Safety features for the condensers

    The condenser fans in your Lennox chiller are protected against overloading. This is achieved by internal protection elements and overload relays. In both cases, a failure will result in disengaging of the respective refrigerant circuit and the generation of a failure indication. When an internal…

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    CONTROLS To operate your Lennox chiller as efficiently as possible, the control functions for the main chiller components are integrated into the Enertronic Control System. A distinction is made between: -Capacity control -Condenser control -Control of electronic expansion valve 5.1. Capacity…

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    Analog setpoint adjustment Analog setpoint adjustment provides the possibility of increasing or decreasing the operating range of your chiller continuously to a maximum of 10K.This is achieved by converting a 0-10 VDC signal (sent from an external control circuit) into a setpoint setting…

24. Стр. 26 5.2. Control of air-cooled condensers

    To adapt the condenser capacity to the cooling capacity to be supplied under different outside air conditions, a pair of controls are available: discrete control (on-off), pulse-width control and control using frequency controllers. The aim of these controls is to keep the condensation temperature…

25. Стр. 27 IN AIR-COOLED ECOLOGIC CHILLERS USING SCROLL COMPRESSORS THE FIRST FAN OF EACH

    CIRCUIT IS PULSE WIDTH CONTROLLED , THE OTHER FANS BEING DISCRETELY CONTROLLED. IN AIR-COOLED ECOLOGIC CHILLERS USING SCREW-TYPE COMPRESSORS THE FIRST TWO FANS OF EACH CIRCUIT ARE PULSE WIDTH CONTROLLED, THE OTHER FANS BEING DISCRETELY CONTROLLED 5.2.3. Control of condenser fans using frequency…

26. Стр. 28 5.4. Controlling the electronic expansion valve

    The Enertronic Control System 2 provides the exact refrigerant dosage to the evaporator. It achieves this by using process data provided by different measurement points in the chiller. Two ‘open / shut’ solenoid valves connected in parallel are used as the control device. These valves are operated…

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    OPERATION Your Enertronic 2 chiller control system has a display unit containing 5 function keys. Using this display and the intelligence integrated in the software, your Lennox chiller can be operated simply and its operating status can be determined. The display has a 4-line LCD screen (Figure 7).…

28. Стр. 30 6.1. Overview of operating functions

    The operations that can be performed using the display module can be roughly divided into four groups: ‘Measurements, Settings, Diagnose, Status’. In sequence, these functions provide the following options: Measurements: This allows a choice to be made to read out the different values measured in…

29. Стр. 31 Level 1

    Level 2 Level 3 F1 Measurements F1 Refrigerant F1 Circuit 1 Condensing pressure Condensing temperature Evaporating pressure Evaporating temperature (bar) (°C) (bar) (°C) F2 Circuit 2 Condensing pressure Condensing temperature Evaporating pressure Evaporating temperature (bar) (°C) (bar) (°C)…

30. Стр. 32 6.1.1. Specific functions

    A number of specific functions require further explanation. 6.1.1.1. Setpoint of water outlet control This can be used to modify the desired value of the water outlet temperature control. Changes of up to +6K with respect to the standard setpoint are possible. The standard setpoint (usually 6°C) is…

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    Reset mode This menu allows the machine to be reset using function key F3. This reset may be necessary if the locking safety feature is tripped by the Enertronic Control System (Chapter 4). REPEATED RESETTING OF THE INTERLOCKS AS A CONSEQUENCE OF INCORRECT SIZING OF THE HYDRAULIC SYSTEM, THE…

32. Стр. 34 Diagnose circuit 2

    30 Circuit OK 31 Low pressure failure circuit 2 34 High pressure failure circuit 2 35 Oil level compressor 2 too low (optional) 36 Motor overload protection compressor 2 tripped 37 Thermistor / phase sequential protection compressor 2 tripped 39 Temperature protection condenser fan(s) circuit 2…

33. Стр. 35 Subject to modification

    Manufacturer Lennox Benelux B.V. Postbus 1028, 3860 BA NIJKERK Watergoorweg 87, 3861 MA NIJKERK Netherlands Tel.: ++31 (0)33-2471800 Fax: ++31 (0)33-2459220 8 EC 91 0005.REV.C.EN 35

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