Electra Air-Conditioning MQH 6 Installation And Maintenance Manual

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Библиотека СОК 

Zertifizierungsstelle / Organismo Notificado No. 0035

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Summary of Contents for Electra Air-Conditioning MQH 6

Page 1 Библиотека СОК  Zertifizierungsstelle / Organismo Notificado No. 0035...
Page 3: Warranty
Foreword Failure to comply with any of these conditions will automati- FOREWORD cally void the warranty. 1.1 Introduction Emergency stop / Normal stop The units, manufactured to state-of-the-art design and The emergency stop of the unit can be enabled using the implementation standards, ensure top performance, main switch.
Page 4 Safety SAFETY The guards of the fans must be always mounted and must never be removed before 2.1 Foreword re-energising the appliance. These units must be installed in conformity with the provi- sions of Machinery Directive 2006/42/EC, Low Voltage Direc- tive 2006/95/EC, Pressure Vessels Directive 97/23/ EC, It is the User's responsibility to ensure that the Electromagnetic Interference Directive 89/336/EC, as well as...
Page 5: Access To The Unit
Safety ENGINEER: means a person authorised directly by the 2.5 Precautions against residual risks agent or, in all EC countries, excluding Italy, under his full Prevention of residual risks caused by the control responsibility, by the distributor of the unit, to perform any system routine and extraordinary maintenance operations, as well as any regulation, control, servicing operations and the...
Page 6 Safety Prevention of other residual risks for outdoor units, do not carry out any operations in the presence of dangerous climatic conditions (rain, snow, make sure that the connections to the unit conform to the mist etc.) instructions provided in this manual and on the unit's panelling The following precautions must be always adopted: if you have to disassemble the unit, make sure that it has...
Page 7: Safety Regulations
Safety 2.7 Safety regulations Refrigerant data Safety data: R410A Toxicity Contact with skin R410A vapors can irritate the skin and eyes. In liquid form, it can freeze skin on contact. If contact with skin occur, flush the exposed area with lukewarm water until all of the chemical is removed.
Page 8 Safety General precautions Do not inhale concentrated vapours. Their concentration in the atmo- sphere 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 9 Safety Refrigerant oil data Safety data:Polyvinylether oil (PVE) Classification Not harmful Contact with skin May cause slight irritation. Does not require first aid measures. It isrec- ommended to follow usual personal hygiene measures, including wash- ing the exposed skin with soap and water several times a day. It is also recommended to wash your overalls at least once a week.
Page 10: Safety Label
Safety Safety Label Caution C26081700/02 Caution C26081800/03 Attention Attention V orsicht V orsicht Attenzione Attenzione Precaución Precaución Do not insert any object into fan grille Ne pas insérer d’objets dans la grille du ventilateur Installing a 60 mesh strainer at the unit inlet pipe Führen Sie keine Gegenstände in das Ventilatorgitter ein Poser un filtre de de 60 mesh au tuyau d’admission de l’unité...
Page 11: Transport, Lifting And Positioning
Transport, Lifting and Positioning TRANSPORT, LIFTING AND POSITIONING Air conditioners are supplied assembled. The equipment are full of refrigerant and oil (except the condensing unit), in the quantity required for a proper operation. The unit cannot be transported at ambient temperature lower than -30°C. 3.1 Inspection When the unit is delivered, it is recommended to check it carefully and to identify any damage occurred during trans-...
Page 12: Installation
Installation INSTALLATION When fixing the unit, a slope of 1 cm/m is recommended to 4.1 Installation advices allow draining of rain water. Unit placement MQH06 and MQH08M/T and MQH10M/T cannot be installed with advanced inclination to 10°. The MQH air-to-water heat pumps must be installed in the open air, in an area where the flow of air to and from the condenser coil must not be limited.
Page 13 Installation Fixing dimensions The fixing dimensions of the unit are shown on picture 3. Vibration isolators are recommended for all roof mounted installation or wherever vibration transmission is a consideration. Picture 3 Maintenance access After installation, each side of the unit must allow easy access for periodic maintenance works. w easy access for periodic maintenance works.
Page 14 Installation Water connections Safety Differential Pressure Switch Water Piping A safety differential pressure switch is factory mounted Local authorities can supply the installer with the proper between water inlet and outlet piping of evaporator, in order building and safety codes required for safe and proper instal- to ensure adequate water flow to evaporator before starting lation.
Page 15: Hydraulic Connection
Installation 4.3 Pressure Drop in Tubes and Hydraulic connection Accessories The water inlet/outlet fittings shall conform to the instructions provided by the plates affixed neat the connection points. To determine the appropriated pipe section, see table 1 which shows the values of pressure drop for various water flows and the diameter of standard copper pipes for hydrau- lic installations.
Page 16: Power Supply
Installation Power supply Electrical connections The unit must be installed on site according to the Before carrying out any operations on the Machinery Directive (2006/42/EC), the Low Voltage electrical system, make sure that the unit is Directive (2006/95/EC), the Electromagnetic Interference deenergised.
Page 17: Preliminary Check
Start-up 5.2 Start-up START-UP On MQH heat pump unit the first start up must be Start-up sequence: done by an authorized technician. Following Turn on the main switch disconnector (at least 4 hours suggestions should be applied in order to do the before).
Page 18: Checking The Operation
Start-up 5.3 Checking the operation Check the following: The temperature of the water entering the evaporator. The temperature of the water leaving the evaporator. The level of the water flow rate in the evaporator, if possible. The current absorption upon the start of the compressor and in case of stabilised operation. The fan's current absorption.
Page 19: Control System
Control System MINICHILLER CONTROL During the normal operation the current value of entering water temperature is displayed flashing alternatively with Operating instructions the current status. To display other useful data, go to 6.1.1 Before start-up level l, use the ^ button to scroll the menu, and use the > button to select the display value.
Page 20 Control System For 3 phase unit, check the phase monitor. If the green LED light is on, means that the phase connection is reverse, need to exchange any two phase connection of three. When the red LED light is on, the compressor can start up normally. Table 5 List of standard parameters Min Value...
Page 21: General Description
42 bar on the refrigerant side. Hydraulic connections to the highly reliable and efficient performance. These appliances evaporator are 3/4" female gas threaded type for MQH 6 are fit for medium and small air - conditioning applications in and 8, 1" female gas threaded type for sizes 10 to 18.
Page 22 General Description Refrigerant Flow Diagrams - MQH 6 /8/10/14/16 Refrigerant Circuit: Hydraulic Circuit: A High Pressure Switch 1 Compressor 11 Drain Valve B Low Pressure Switch 2 4 Way Valve 12 Safety Valve C Differential Pressure Switch 3 Coil + Fan...
Page 23: Technical Data
Technical data TECHNICAL DATA 8.1 Technical data V/ph/Hz Power supply Number of circuits Number of steps Refrigerant Type Charge(l) 1.80 2.20 2.20 2.84 2.75 Compressors Type Rotary Rotary Rotary Rotary Rotary Number Start-up type Direct Evaporator Type Plate Number Condenser Type Coil Hydraulic connections...
Page 24 Technical data Power supply Number of circuits Number of steps Refrigerant Type Change(l) 3.60 3.53 4.63 5.65 Compressors Type Scroll Scroll Scroll Scroll Number Start-up type Direct Evaporator Type Plate Number Condenser Type Coil Hydraulic connections Type Female Inlet diameter Inch Outlet diameter Inch...
Page 25: Unit Electrical Data
Technical data Unit Electrical Data Rated voltage V-Ph-Hz Max. absorbed power Rated current 13.0 16.4 11.5 Max. current(FLA) 11.1 15.6 19.8 10.2 11.6 14.3 37.0 83.0 36.0 96.0 55.0 66.0 66.0 69.0 73.0 Max. start-up current(LRA) 20.0 25.0 12.0 16.0 12.0 16.0 16.0...
Page 26 Technical data Overall dimensions MQH 06/08M/08T FRONT VIEW SIDE VIEW DETAIL A TOP VIEW Air vent valve Water pressure gauge Water drain valve Elcctrica power Water outlet 3/4" supply gas fcmalc LP tap Water inlet 3/4" gas female HP tap Water drain valve MQH 10M/10T/12 FRONT VIEW...
Page 27 Technical data MQH 14/16/18 FRONT VIEW SIDE VIEW DETAIL A TOP VIEW Air vent valve Electrical power supply Water inlet 1" gas female Water pressure gauge Water outlet 1" gas female HP tap Water drain valve LP tap 8.4 Clearences MQH 06 to 18...
Page 28: Maintenance
Maintenance MAINTENANCE Planned maintenance Carefully read the "Safety" section of this manual before carrying out any maintenance operations. Do not discharge the refrigerant into the atmo- Operations sphere while the refrigeration circuits are being drained. Use appropriate recovery equip- ment. When the recovered refrigerant cannot be re-used, return it to the manufacturer.
Page 29: Refrigerant Charge
Maintenance Refrigerant charge Compressors use PVE oil. During maintenance operations on the compressor, or if you have to open the refrigerant circuit in any point, remember Do not inject refrigerant liquid into the LP side of that this type of oil is highly hygroscopic, and the circuit.
Page 30 Maintenance 9.8 Evaporator Check at regular intervals that the water side of the heat exchanger is perfectly clean. To do this, measure the pressure drop, water side (see Section 8) or measure the temperature of the liquid leaving and entering the heat exchanger, and compare it to the evaporation temperature.
Page 31: Troubleshooting
Troubleshooting 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 the Authorised Service Centre for technical assistance. Cause Abnormality Operation Insufficient charge of refrigerant...
Page 32 Troubleshooting Anomaly Cause Operation Identify and remove the leak Gas leak Activation of the LP alarm, Insufficient charge Refill stop of the unit Replace the pressure switch Failure of the pressure switch Check the operation of the pressure Failure of the pressure switch switch, replace it if defective The delivery valve is partially closed Open the valve and replace it, if faulty...
Page 33: Spare Part List
Spare parts SPARE PARTS 11. 1 Spare part list Exploded view please see appendix B. SPL for MQH 06/08 MQH 06 MQH 08M MQH 08T Description top plate condenser assembly fan motor base plate left front plate compressor right front plate compressor crank heater 4-way reversing valve air outlet grill...
Page 34 Spare parts...
Page 35: Dismantling, Demolition And Scrapping
Dismantling, Demolition and Scrapping DISMANTLING, DEMOLITION AND After draining operations, the piping of the hydraulic networks can be disconnected and disassembled. SCRAPPING Once they have been disconnected as specified, the During the draining of the refrigeration packaged units can be disassembled in a single piece. First circuits, do not let the refrigerant overflow in of all, disassemble the anchoring screws and then lift the the surrounding atmosphere.
Page 36: Wiring Diagram
Appendix A Wiring Diagram VALUE...
Page 37 Appendix A MQH 06/08M...
Page 38 Appendix A MQH 08T...
Page 39 Appendix A MQH 08T...
Page 40 Appendix A MQH 10M...
Page 41 Appendix A MQH 10M...
Page 42 Appendix A MQH 10T/12/14/16/18...
Page 43 Appendix A MQH 10T/12/14/16/18 VIII...
Page 44: Exploded View
Appendix B Exploded View MQH 06/08M/08T...
Page 45 Appendix B MQH 10M/10T/12/14/16/18...
Page 47 Electra Air-Conditioning(shenzhen)Co., Ltd. 2 Wuhe Avenue S., Bantian,Buji shenzhen, China...

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