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Installation and maintenance manual
Manuel d'installation et de maintenance
MQL/MQH 4 ÷ 17
English
Air cooled water chillers and air-to-water reverse cycle heat pumps
4.5
Refroidisseurs de liquide à condensation par air et pompes à chaleur
16.5 kW
réversibles air-eau
4.6
18.4 kW
IOM MQLH-N.1GBF
Date : November / Novembre 2005
Supersedes / Annule et remplace : None
Français
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Summary of Contents for Itelco-Clima units MQL4
- Page 1 Installation and maintenance manual Manuel d’installation et de maintenance MQL/MQH 4 ÷ 17 English Français Air cooled water chillers and air-to-water reverse cycle heat pumps Refroidisseurs de liquide à condensation par air et pompes à chaleur 16.5 kW réversibles air-eau ...
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Page 2: Table Of Contents
Manuale MQL-MQH 10.6.2005 12:25 Pagina 1 Table of contents Table of contents 1 FOREWORD 6 MINICHILLER CONTROL 1.1 Introduction 6.1 Operating instructions 1.2 Warranty 6.2 Failure Diagnostics 1.3 Emergency stop/Normal stop 7 GENERAL DESCRIPTION 1.4 An introduction to this manual 7.1 Introduction 2 SAFETY 7.2 General specifications... -
Page 3: Foreword
FOREWORD 1.1 Introduction 1.3 Emergency stop / Normal stop Itelco-Clima units, manufactured to state-of-the-art de- The emergency stop of the unit can be enabled using the master switch on the control panel (move down sign and implementation standards, ensure top per- the lever). -
Page 4: Safety
The packaging material must not be dis- tion of hydrocarbons. posed of in the surrounding environment or burnt. Itelco-Clima units are designed and manufactured according to the requirements of European Standard PED 97/23/EC (pressure vessels). – The used refrigerants are included in group II (non- 2.2 Definitions... -
Page 5: Access To The Unit
Manuale MQL-MQH 10.6.2005 12:26 Pagina 4 Safety OPERATOR: means a person authorised by the own- use tools in a good state of repair; be sure to have er to do on Itelco-Clima unit all the regulation and understood the instructions before using them control operations expressly described in this manu- be sure to have removed all tools, electrical cables al, that must be strictly complied with, without ex-... -
Page 6: Precautions During Maintenance Operations
Manuale MQL-MQH 10.6.2005 12:26 Pagina 5 Safety periodically check the board’s internal wiring To carry out any measurements or checks which re- quire the activation of the machine: do not use cables having an inadequate section or flying connections, even for limited periods of time work with the electrical board open only for the or in an emergency necessary time... -
Page 7: Safety Labels
Manuale MQL-MQH 10.6.2005 12:26 Pagina 6 Safety 2.7 Safety labels The labels below will be affixed to each unit in the indicated point: Electrical warning Adjacent to the master switch Identification of the unit - Outside, on the right-hand front column EIN - INLET ENTRÉE - ENTRATA AUS - OUTLET... -
Page 8: Safety Regulations
Manuale MQL-MQH 10.6.2005 12:26 Pagina 7 Safety Safety regulations Refrigerant data Safety data: R407C Toxicity Contact with skin If sprayed, the refrigerant is likely to cause frost burns. If absorbed by the skin, the danger is very limited; it may cause a slight irritation, and the liquid is degreasing. - Page 9 Manuale MQL-MQH 10.6.2005 12:26 Pagina 8 Safety General precautions Do not inhale concentrated vapours. Their concentration in the atmos- phere should not exceed the minimum preset values and should be maintained below the professional threshold. Being more weighty than the air, the vapour concentrates on the bottom, in narrow areas. There- fore, the exhaust system must work at low level.
- Page 10 Manuale MQL-MQH 10.6.2005 12:26 Pagina 9 Safety Refrigerant oil data Safety data: Polyolester oil (POE) Classification Not harmful Contact with skin May cause slight irritation. Does not require first aid measures. It is rec- ommended to follow usual personal hygiene measures, including wash- ing the exposed skin with soap and water several times a day.
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Page 11: Transport, Lifting And Positioning
Manuale MQL-MQH 10.6.2005 12:26 Pagina 10 Transport, Lifting and Positioning TRANSPORT, LIFTING 3.3 Anchoring AND POSITIONING It is not essential to secure the unit to the foundations, unless in areas where there is a serious risk of earth- Refrigerators are supplied assembled. The equip- quake, or if the appliance is installed on the top of a ment are full of refrigerant and oil (except to the con- steel frame. -
Page 12: Installation
Manuale MQL-MQH 10.6.2005 12:26 Pagina 11 Installation INSTALLATION The units should be installed on a flat and hard, preferably concrete base. 4.1 Installation advices When fixing the unit, a slope of 1 cm/m is recom- mended to allow draining of rain water. Unit placement Units MQL/MQH 4 and 6 cannot be The MQL/MQH water chillers are cooled by air. - Page 13 Manuale MQL-MQH 10.6.2005 12:26 Pagina 12 Installation Fixing dimensions The fixing dimensions of the unit are shown on the figure opposite. Vibration isolators are recommend- ed for all roof mounted installation or wherever vibration transmis-sion is a consideration. Picture 3 shows the location of each isolato ARIA 4xØ13 1142...
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Page 14: Water Connections
Manuale MQL-MQH 10.6.2005 12:26 Pagina 13 Installation Water connections Safety Differential Pressure Switch Water Piping A safety differential pressure switch (ref. 6) is facto- ry mounted on water inlet piping of evaporator, in Local authorities can supply the installer with the order to ensure adequate water flow to evaporator proper building and safety codes required for safe before starting up the unit. -
Page 15: Pressure Drop In Tubes And Accessories
Manuale MQL-MQH 10.6.2005 12:26 Pagina 14 Installation 4.3 Pressure Drop in Tubes and 4.4 Hydraulic connection Accessories The water inlet/outlet fittings shall conform to the in- To determine the appropriated pipe section, see structions provided by the plates affixed neat the table n°... -
Page 16: Power Supply
Manuale MQL-MQH 10.6.2005 12:26 Pagina 15 Installation 4.7 Power supply 4.8 Electrical connections Before carrying out any operations on the The unit must be installed on site according to the electrical system, make sure that the unit is Machinery Directive (98/37/EC), the Low Voltage Di- deenergised. -
Page 17: Start-Up
Manuale MQL-MQH 10.6.2005 12:26 Pagina 16 Start-up START-UP 5.2 Start-up Start-up sequence: On MQL-MQH Chiller the first start up must be done by an authorized technician. Fol- Turn on the main switch disconnector (at least 4 lowing suggestions should be applied in or- hours before). -
Page 18: Checking The Operation
Manuale MQL-MQH 10.6.2005 12:26 Pagina 17 Start-up 5.3 Checking the operation Check the following: The temperature of the water entering the evapo- rator. The temperature of the water leaving the evapora- tor. The level of the water flow rate in the evaporator, if possible. -
Page 19: Minichiller Control
Manuale MQL-MQH 10.6.2005 12:26 Pagina 18 Control System MINICHILLER CONTROL Doing this, you can display the shop setting, which is 12 °C. This setting can be increased or Operating instructions decreased by scrolling its value up or down, through the relevant keys. 6.1.1 Before start-up Once the desired value has been displayed, sim- ply press both keys for 2 seconds to accept it and... -
Page 20: Failure Diagnostics
Manuale MQL-MQH 10.6.2005 12:26 Pagina 19 Control System 6) In case of summer/winter switching through re- • an anomalous noise in the compressor mote contact, the unit will operate in cool- • the lack of the correct differential between dis- ing mode when this contact is closed and charge pressure and suction pressure (i.e. -
Page 21: General Description
Manuale MQL-MQH 10.6.2005 12:26 Pagina 20 General Description GENERAL DESCRIPTION All the units are equipped with a pump; in this case too, it is possible to buy a kit which makes it possi- ble to remove the pump from the unit and to install a 7.1 Introduction pump outside the unit (see picture). -
Page 22: Compressors
Manuale MQL-MQH 10.6.2005 12:26 Pagina 21 General Description 7.3 Compressors Furthermore, protection against frost is ensured by electric heaters. These exchangers can work up to a pressure of 3 - bar on the hydraulic side and up to a Compressors are of rotary type for sizes 4 and 6 and pressure of 30 - bar on the coolant side. - Page 23 Manuale MQL-MQH 10.6.2005 12:26 Pagina 22 General Description Outline refrigerator MQL 10-17 Members system refrigerator: Members hydraulic system: Devices of Emergency: 1 Compressor Drain Valve A+P1 High pressure 2 Coil + Fan Safety Valve B+P1 Low pressure 3 Capillary tube Water Manometer D+P1 It differentiates them 4 Heat exchanger...
- Page 24 Manuale MQL-MQH 10.6.2005 12:26 Pagina 23 General Description Outline refrigerator MQH 10-17 Members system refrigerator: Members hydraulic system: Devices of Emergency: 1 Compressor Drain Valve A+P1 High Pressure Switch 2 4 Way Valve Safety Valve A+P2 Emergency ventilation 3 Coil + Fan Water Manometer B+P1 Low Pressure Switch 4 Capillary tube...
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Page 25: Technical Data
Manuale MQL-MQH 10.6.2005 12:26 Pagina 24 Technical data TECHNICAL DATA 8.1 Technical data Power supply V/ph/Hz 220V-1-50Hz 220V-1-50Hz 220V-1-50Hz 400/3+N/50 Number of circuits Number of steps 0-100 0-100 0-100 0-100 Refrigerant Type R407C Charge (1) Compressors Type Rotating Rotating Scroll Scroll Number Start-up type... - Page 26 Manuale MQL-MQH 10.6.2005 12:26 Pagina 25 Technical data Power supply V/ph/Hz 220V-1-50Hz 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50 Number of circuits Number of steps 0-100 0-100 0-100 0-100 0-100 Refrigerant Type R407C Charge (1) 2.42 2.42 2.43 3.6. Compressors Type Scroll Scroll Scroll Scroll Scroll...
- Page 27 Manuale MQL-MQH 10.6.2005 12:26 Pagina 26 Technical data Power supply V/ph/Hz 220V-1-50Hz 220V-1-50Hz 220V-1-50Hz 400/3+N/50 Number of circuits Number of steps 0-100 0-100 0-100 0-100 Refrigerant Type R407C Charge (1) Compressors Type Rotating Rotating Scroll Scroll Number Start-up type Direct Evaporator Type Slabs...
- Page 28 Manuale MQL-MQH 10.6.2005 12:26 Pagina 27 Technical data Power supply V/ph/Hz 220V-1-50Hz 400/3+N/50 400/3+N/50 400/3+N/50 400/3+N/50 Number of circuits Number of steps 0-100 0-100 0-100 0-100 0-100 Refrigerant Type R407C Charge (1) 2.66 2.66 2.74 3.8. Compressors Type Scroll Scroll Scroll Scroll Scroll...
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Page 29: Unit Electrical Data
Manuale MQL-MQH 10.6.2005 12:26 Pagina 28 Technical data 8.2 Unit Electrical Data MQL/MQH Rated voltage V/ph/Hz 230V-1-50Hz 400/3+N/50 Max. absorbed power Rated current 10.1 16.4 Max. current (FLA) 11.7 20.7 Max. start-up current (LRA) External fuses Max. cable section (1) MQL/MQH Rated voltage V/ph/Hz... - Page 30 Manuale MQL-MQH 10.6.2005 12:26 Pagina 29 Technical data Fans Electrical data MQL/MQH Fans Number n° Rated power per fan 0.15 0.15 0.15 0.15 Max. absorbed current per fan MQL/MQH Fans Number n° Rated power per fan 0.15 0.15 0.15 0.15 0.15 Max.
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Page 31: Overall Dimensions
Manuale MQL-MQH 10.6.2005 12:26 Pagina 30 Technical data 8.3 Overall dimensions MQL/MQH 4-8 400,5 FRONT VIEW SIDE VIEW NOTES: A - WATER INLET Ø 1" GAS F B - WATER OUTLET Ø 1" GAS F C - WATER DRAIN Ø 1/2"... -
Page 32: Clearances
Manuale MQL-MQH 10.6.2005 12:26 Pagina 31 Technical data 8.4 Clearences MQL/MQH 4-8 MQL/MQH 10-17 Page 31... -
Page 33: Maintenance
9.1 General requirements Check delivery pressure • and temperature Itelco-Clima units have been designed for continuous operation, providing that they are subjected to regu- lar maintenance, within the limits specified in this Check that the fins of the •... -
Page 34: Refrigerant Charge
Manuale MQL-MQH 10.6.2005 12:26 Pagina 33 Maintenance 9.3 Refrigerant charge Compressors use polyester oil. During maintenance operations on the compressor, or if you have to open the refrigerant circuit Do not inject refrigerant liquid into the LP in any point, remember that this type of oil side of the circuit. -
Page 35: Thermostatic Expansion Valve (Only Mql-Mqh 4-8)
Manuale MQL-MQH 10.6.2005 12:26 Pagina 34 Maintenance Thermostatic expansion valve (Only MQL-MQH 4-8) The circuit of the unit is equipped with a thermostatic expansion valve, with external equalizer. The valve is shop-calibrated for an overheating of 5°C. Procedure to check for overheating: –... -
Page 36: Troubleshooting
Manuale MQL-MQH 10.6.2005 12:26 Pagina 35 Troubleshooting 10 TROUBLESHOOTING The table below lists the anomalies of operation of the unit, the relevant causes and the corrective measures. For anomalies of any other type or not listed, contact one of Itelco-Clima’s Service Centre for technical assis- tance. - Page 37 Manuale MQL-MQH 10.6.2005 12:26 Pagina 36 Troubleshooting Anomaly Cause Operation Compressors is not work- Breaking of the electric circuit. Check the electric circuit and detect ing. any ground dispersions and short cir- cuits. Check fuses. Intervention of the HP pressure Reset the pressure switch and the con- switch.
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Page 38: Spare Parts
Manuale MQL-MQH 10.6.2005 12:26 Pagina 37 Spare parts SPARE PARTS 11.1 Spare part list The table below shows the list of spare parts recom- mended during the first two years of operation. Component Number HP pressure switch LP pressure switch Gas filter Thermostatic valve (only 4-8) Fan’s fuses (only 4-8) -
Page 39: Dismantling, Demolition And Scrapping
Manuale MQL-MQH 10.6.2005 12:26 Pagina 38 Dismantling, Demolition and Scrapping 12 DISMANTLING, DEMOLITION After draining operations, the piping of the hydraulic networks can be disconnected and disassembled. AND SCRAPPING Once they have been disconnected as specified, the During the draining of the refrigeration cir- packaged units can be disassembled in a single cuits, do not let the refrigerant overflow in piece. - Page 40 Wesper S.A.S. 42, cours Jean-Jaurès 17800 PONS - FRANCE : +33-5 46 92 33 33 : +33-5 46 91 38 33 www.wesper.com Your distributor / Votre agent commercial : As part of our ongoing product improvement programme, our products are subject to change without prior notice.
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