Инструкция на Чиллеры Lennox серии LCE

Текст инструкции

1. Стр. 1 Installation, use and maintenance manual

   COOLING ONLY AND HEAT PUMP VERSIONS USER MANUAL

2. Стр. 2 File : LCE-0-UM-GB-02_LENNOX

   Validità: 17/06/2008 2

3. Стр. 3 CONTENTS

   1 THE SERIES 6 2 FIELD OF APPLICATION 7 3 GENERALITIES 7 4 INSPECTION, CONVEYANCE, SITING 4.1 INSPECTION 9 4.2 LIFTING AND CONVEYANCE 9 4.3 UNPACKING 10 4.4 SITING 10 INSTALLATION 11 5.1 INSTALLATION CLEARANCE REQUIREMENTS 11 5.2 GENERAL GUIDELINES FOR PLUMBING CONNECTIONS 12 5.3 WATER CONNECTION TO…

4. Стр. 4

   ANTIFREEZE THERMOSTAT 25 9.6 ANTI-RECYCLE TIMER 25 9.7 OIL DIFFERENTIAL PRESSURE SWITCH 25 10 ROUTINE MAINTENANCE AND CHECKS 25 10.1 WARNINGS 25 10.2 GENERALITIES 26 10.3 REPAIRING THE COOLING CIRCUIT 26 10.4 TIGHTNESS TEST 26 10.5 HARD VACUUM AND DRYING OF THE COOLING CIRCUIT 27 10.6 CHARGING WITH…

5. Стр. 5 Declaration of conformity

   The declaration of conformity is individually appended to the documents accompanying the unit, normally placed inside the electrical enclosure. File : LCE-0-UM-GB-02_LENNOX Validità: 17/06/2008 5

6. Стр. 6 1 THE SERIES

   Fluid chillers and heat pumps designed to cool water or mixtures of water and an antifreeze agent, intended for civil air conditioning and industrial cooling systems. LCE chillers, available in versions with different acoustic designs (“S”, “L”, “Q”) and cooling circuit architectures (Efficiency…

7. Стр. 7 Below is a list of all possible models, broken down by efficiency pack

8. Стр. 8 - THE UNIT MUST BE STARTED UP FOR THE FIRST TIME EXCLUSIVELY BY QUALIFIED

   PERSONNEL AUTHORISED BY LENNOX S.P.A. (SEE ATTACHMENT). - FAILURE TO COMPLY WITH THE RULES PROVIDED IN THIS MANUAL OR ANY MODIFICATION MADE TO THE UNIT WITHOUT PRIOR AUTHORISATION WILL RESULT IN THE IMMEDIATE INVALIDATION OF THE WARRANTY. Warning: Before performing any kind of work on the unit, make…

9. Стр. 9 4 INSPECTION, CONVEYANCE, SITING

   4.1 INSPECTION On receiving the unit, check that it is perfectly intact: the chiller left the factory in perfect conditions; immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing it. Check, in particular, that the fins of the finned block heat…

10. Стр. 10

    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…

11. Стр. 11 5 INSTALLATION

    5.1 INSTALLATION CLEARANCE REQUIREMENTS It is of fundamental importance to ensure an adequate volume of air both on the intake and outlet sides of the finned condenser coils; it is highly important to prevent the air delivered from being re-aspirated as this may impair the performance of the unit or…

12. Стр. 12

    GENERAL GUIDELINES FOR PLUMBING CONNECTIONS When you are getting ready to set up the water circuit for the evaporator you should follow the directions below and in any case make sure you comply with national or local regulations (use the diagrams included in this manual as your reference). - Connect…

13. Стр. 13

    WATER CONNECTION TO THE EVAPORATOR It is of fundamental importance that the incoming water supply is hooked up to the connection marked “Water Inlet”. Otherwise the evaporator would be exposed to the risk of freezing since the antifreeze thermostat would not be able to perform its function; moreover…

14. Стр. 14 A standard feature of LCE units is a device for controlling the flow rate (differential

    pressure switch) in the water circuit in the immediate vicinity of the evaporator. Any tampering with said device will immediately invalidate the warranty. It is advisable to install a metal mesh filter on the inlet water pipe. It is strongly recommended to install a safety valve in the water…

15. Стр. 15

    SAFETY DEVICES ON THE HIGH PRESSURE SIDE Cooling circuit safety devices are provided on each refrigerant circuit according to the volumetric capacity of the compressors installed, as prescribed by Directive 97/23 (PED); in particular, with respect to equipment design, this Directive requires…

16. Стр. 16 The above operating conditions must always be complied with: failure to ensure said

    conditions will result in the immediate invalidation of the warranty. The electrical connections must be made in accordance with the information shown in the wiring diagram provided with the unit and current regulations. Electrical connections and preliminary checks:: • Put on the main switch, turn…

17. Стр. 17

    REMOTE CONTROLS If you wish to include a remote control for switching the unit on and off, you must remove the jumper between the contacts indicated in the wiring diagram and connect the remote ON/OFF control to the terminals themselves [see annexed wiring diagram]. All remote controls work with a…

18. Стр. 18 pCo

    7 STARTING UP 7.1 PRELIMINARY CHECKS - Check that all the valves in the cooling circuit are open (liquid line). - Check that the electrical connections have been made properly and that all the terminals are securely tightened. This check should also be included in a periodic six-month inspection.…

19. Стр. 19 Pressure within

    crankcase Oil T % of R410A dissolved in oil 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 is held at a constant pressure, an increase in temperature will…

20. Стр. 20

    CHECKS DURING OPERATION - Check the phase sequence relay on the control board to verify whether the phases occur in the correct sequence: if they do not, disconnect the unit from power supply and reverse two phases at the unit input. Never attempt to modify internal electrical connections: any undue…

21. Стр. 21 Warning: the refrigerant R410A requires “POE” polyolester oil of a type approved by the

    compressor manufacturer. For no reason should a mineral oil be introduced into the oil circuit. P Compressor discharge real P Average T (T1+T2)/2 T1 (start of condensation) DEW POINT T2 (end of condensation) BUBBLE POINT R410A Enthalpy h - 7.5 The difference between the Dew Point and Bubble Point is…

22. Стр. 22 Proactive action of an Electronic Expansion Valve

    In the event of a compressor on/off request: The electronic driver pre-positions the valve at a point very near the final equilibrium point A status of equilibrium is quickly reached with small adjustments The electronic expansion valve becomes an active, rather than passive, component within the…

23. Стр. 23

    CHILLED WATER TEMPERATURE The minimum temperature of the water leaving the evaporator is 5°C: lower temperatures are possible, but for such applications the Manufacturer should be consulted at the time the order is placed. The maximum temperature of the water entering the evaporator is 20°C. To…

24. Стр. 24 TABLE II – SETTING OF SAFETY - CONTROL DEVICES

    - LCE SERIES CONTROL DEVICE Antifreeze thermostat Safety maximum pressure switch Safety maximum pressure switch High pressure relief valve Minimum pressure switch Modulating condensation control device Time lapse between two starts of the same compressor Delay in flow switch alarm Delay in low…

25. Стр. 25

    ANTIFREEZE THERMOSTAT The antifreeze sensor situated at the evaporator outlet detects the presence of excessively low temperatures and stops the unit. Together with the flow switch and low pressure switch, this device protects the evaporator from the risk of freezing as a result of faults in the…

26. Стр. 26 10.2 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…

27. Стр. 27 Do not use oxygen in the place of nitrogen as a test agent, since this could cause a risk

    of explosion as well as the certainty of extensive oxidisation in high-temperature areas. 10.5 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.…

28. Стр. 28 10.7 ENVIRONMENTAL PROTECTION

    The law implementing the regulations [reg. EEC 2037/00] which govern the use of ozone-depleting substances and greenhouse gases bans the dispersal of refrigerant gases in the environment and requires whoever is in their possession to recover them and, at the end of their useful life, either to…

29. Стр. 29 12 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…

30. Стр. 30 The unit does not start

    Possible causes Corrective actions Check that power is being supplied both to the primary and auxiliary circuits. The electronic card is cut off from Check the protections. the power supply. Alarms have been triggered. Check whether any alarms are signalled on the microprocessor control panel…

31. Стр. 31 Low condensation pressure

    Low evaporation pressure. The compressor does not start. File : LCE-0-UM-GB-02_LENNOX Possible causes Corrective actions Transducer fault. Check the transducers and the efficiency of the needle pusher on the schrader valves they are connected to. Outdoor T too low and/or presence Install the…

32. Стр. 32 High evaporation pressure

    Possible causes Corrective actions Water T too high. Check the thermal load and/or efficiency of the thermostat function. Check the efficiency of the thermostatic valve. Defrosting absent or incomplete Error in parameter settings. Check the setting of the start and (HS-HL-HQ versions). end defrost…

33. Стр. 33 14 SUMMARY TECHNICAL DATA

34. Стр. 35 15 SUMMARY TABLE OF WEIGHTS

    This drawing illustrates the points of the machine for which the weights for the basic chiller and heat pump models have been calculated. The values are shown in the following tables. Important note: the weights of hydronic modules (C-H; with 2 pumps + reservoir, with 1 pump + reservoir, with 2…

35. Стр. 37 LCE weights - heat pump

36. Стр. 39 Weights with 1 pump + full storage reservoir (to be added to the STD weight)

37. Стр. 40 Weights with 2 pumps (to be added to the STD weight)

38. Стр. 41 Weights with 1 pump (to be added to the STD weight)

39. Стр. 42 15.3 PUMPING AND STORAGE SYSTEMS

    LCE units may be equipped with 6 types of pumping systems, complete with expansion tank and storage reservoirs single standard pump single uprated pump standard pump and back-up pump uprated pump and back-up pump standard pump for combined operation uprated pump for combined operation. In the case…

40. Стр. 44 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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