Инструкция на Чиллеры Lennox серии LSE...

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1. Стр. 1 LSE water chillers

   water chillers – CS/CL heat pumps chillers – HS/HL free-cooling chillers – FS/FL Installation, use and maintenance manual

2. Стр. 4 1. GENERAL DESCRIPTION

   1.1 The series The LSE series of chillers, fluid coolers (CS-CL), heat pumps coolers (HS-HL) and Free Cooling coolers (FSFL), covers a power range from 355 to 918 kW. LSE industrial chillers are equipped with SCROLL compressors assembled in an heavy frame made in galvanized steel powder coated in…

3. Стр. 5 2.3 Unpacking

   The packing must be carefully removed to avoid the risk of damaging the unit. Different packing materials are used: wood, cardboard, nylon etc. It is recommended to keep them separately and deliver them to suitable waste disposal or recycling facilities in order to minimise their environmental…

4. Стр. 6 SOLLEVAMENTO E

   MOVIMENTAZIONE LIFTING AND HANDLING Va eseguita tramite sollevamento con gru e apposite tubazioni in acciaio ø2”1/2 (consegnate in dotazione - da inserire nel basamento attraverso gli appositi fori) dimensionate per far fronte al massimo peso dell’unità, alle quali assicurare funi o cinghie di…

5. Стр. 7 TRASPORTO

   Carico laterale tramite muletto TRANSPORT Side loading by forklift truck Il carico/scarico laterale tramite carrello sollevatore non è possibile se non utilizzando un camion a pianale ribassato (luce di carico minima pari a 3000mm) completamente apribile di lato e non centinato - vedi fig.4. Una…

6. Стр. 8 3. INSTALLATION

   3.1 Generalities You should pay attention to the following aspects when choosing the best site for installing the unit and the relative connections: - size and position of water pipes; - location of power supply; - accessibility for maintenance or repairs; - solidity of the supporting base…

7. Стр. 9 1,5 m

   1,5 m unit front 2m unit rear 1,5 m 3.3 General guidelines for hydraulic connections When you are getting ready to set up the water circuit for the evaporator you should follow the indication given below and in any case make sure you comply with national or local regulations (use the diagrams…

8. Стр. 10

   • drainage valve and, where necessary, a drainage tank for emptying out the equipment for maintenance purposes or when the unit is taken out of service at the end of the season. [A 1” drainage valve is provided on the optional water storage reservoir: this operation may only be carried out when the…

9. Стр. 11

   The Fig.6 shows the integrated and well-balanced effect of the gather tank. Its function supports an exact control of the temperature according to the ambient parameters of the connected groups. Fig.6 Tank Tt Q; TW in Q; TW out A standard feature of LSE units is a device for controlling the flow…

10. Стр. 12 The free-cooling configuration allows considerable savings in every situation in which the outdoor

    temperature is lower than the circulating fluid one (transformation industry, close control applications, data-transmission in general, convention halls, etc.). The free-cooling circuit performances depend on the difference between the outdoor air temperature and the circulating water temperature in…

11. Стр. 13 4. ELECTRICAL CONNECTIONS

    4.1 Generalities Before carrying out any job on electrical parts, make sure the power supply is disconnected. Check that the mains electricity supply is compatible with the specifications (voltage, number of phases, frequency) shown on the unit rating plate. The connection to the power supply should…

12. Стр. 14 4.3 Electric connections of the circulation pump (if present)

    If selected on ordering, it/they is/are supplied pre-wired with all LSE units. The pump must be started before the chiller and stopped after the latter (minimum recommended delay: 60 seconds). If included as an option, this function is already performed by the electric control board on the unit. 4.4…

13. Стр. 15 The diagram above illustrates a specific property [Charles’ Law] of gases, which are more soluble in

    liquids as the pressure increases but less soluble as the temperature increases: if the oil in the sump is held at a constant pressure, an increase in temperature will significantly reduce the amount of refrigerant dissolved in it, thus ensuring that the lubricating function desired is maintained.…

14. Стр. 16 -Make sure the superheating of the suction gas is limited to between 5 and 8 °C: to this end

    1) read the temperature indicated by a contact thermometer placed on the compressor intake pipe; 2) read the temperature indicated on the scale of a pressure gauge likewise connected to the intake side; refer to the pressure gauge scale for the refrigerant R410A. The degree of overheating is given…

15. Стр. 17 6. OPERATING LIMITS

    Operating limits of LSE units in relation with outlet water temperature and outdoor air temperature: Min. 5 (30) -10 Evaporator outlet water temperature [°C]: External air temperature [°C]: Max. 12 (45) 45 Limits of the Chiller versions CS/CL Producer water T 15° 13° 5° External air T 25° 42° 46°…

16. Стр. 18 6.1 Water flow to the evaporator

    The nominal flow rate is based on a thermal differential of 5° C between inlet and outlet water, in relation to the cooling capacity provided at the nominal water (12/7 °C) and air (35°C) temperatures. The maximum allowed flow rate is associated with a thermal differential of 3 °C: higher flow rates…

17. Стр. 19 6.5 Limits of the Free-Cooling versions FS/FL

    Free-Cooling option is available for all models operating with only cooling. This function cannot be matched with heat pump operating. Due to the particular kind of application, all units are provided with a condensation control device and a microprocessor control, type ADVANCED, mounted by series.…

18. Стр. 20 7. CONTROL DEVICE SETTINGS

    7.1 Generalities All the control devices are set and tested in the factory before the unit is dispatched. However, after the unit has been in service for a reasonable period of time you can perform a check on the operating and safety devices. The settings are shown in Tables II and III. The control…

19. Стр. 21 7.3 Minimum pressure switch

    The low pressure switch stops the compressor when the intake pressure falls below the set value for more than 180 seconds. The switch is automatically reset when the pressure rises above the set differential (see Table II); however, the unit will not resume operation until the alarm memory on the…

20. Стр. 22 8. ROUTINE MAINTENANCE AND CHECKS

    The only tasks to be performed by the end user are turning the chillers on and off and switching them between the cooling and heating functions as the seasons change. All other operations are to be considered maintenance work and must thus be carried out by qualified personnel trained to do their…

21. Стр. 23 8.2 Generalities

    It is a good idea to carry out periodic checks to ensure that the unit is working properly: • Check the efficiency of all the control and safety devices as previously described. • Check the terminals on the electric control board and compressor terminal boards to ensure that they are securely…

22. Стр. 24 8.5 Hard vacuum and drying of the cooling circuit

    To achieve a hard vacuum in the cooling circuit it is necessary to use a pump capable of generating a high degree of vacuum, i.e. 15 Pa of absolute pressure. If there is no suitable vacuum pump available, or whenever the circuit has remained open for long periods of time, you are strongly…

23. Стр. 25 9. TROUBLESHOOTING

    On the next pages you will find a list of the most common causes that may cause the chilling unit to fail or malfunction. These causes are broken down according to easily identifiable symptoms. You should be extremely careful when attempting to implement any of the possible remedies suggested…

24. Стр. 26 FAULT

    Low condensation pressure Possible causes Transducer fault. Outdoor T too low and/or presence of strong winds. Low evaporation pressure Low water T, in the case of heat pump operation. Insufficient flow of water. Malfunctioning of thermostatic valve. Filter clogged. Low condensation T. Low level of…

25. Стр. 27 10. TECHNICAL FEATURES

26. Стр. 30 All rights reserved

    No part of this publication may be reproduced without the prior written permission of Lennox. Lennox S.p.A. reserves the right to change the specifications and other information contained herein without notice. In no case shall Lennox be responsible for damage or injury caused to property or persons…

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