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V6-i VRF 50Hz

94

Midea

V

6

-i

Series

Engineering D

at

a Bo

ok

4.6

Branch Joints

4.7

Pipe Flushing

4.7.1

Purpose

To remove dust, other particles and moisture, which could cause compressor malfunction if not flushed out before the
system is run, the refrigerant piping should be flushed using nitrogen. As described in Part 3, 4.1.1 “Installation procedure”,
pipe flushing should be performed once the piping connections have been completed with the exception of the final
connections to the indoor units. That is, flushing should be performed once the outdoor units have been connected but
before the indoor units are connected.



Use U-shaped branch joints as specified on the
construction drawings – do not replace U-shaped branch
joints with tee joints.



Indoor branch joints may be installed either horizontally or
vertically. Horizontal branch joints must be installed at an
angle to the horizontal not exceeding 10° in order to avoid
uneven distribution of refrigerant and possible
malfunction. Refer to Figure 3-4.8.



To  ensure  even  distribution  of  refrigerant,  a  limitation  is
placed  on  how  close  branch  joints  may  be  installed  to
bends,  other  branch  joints  and  the  straight  sections  of
piping leading to indoor units. Refer to Part 3, 3.6 “Branch
Joints”.

Figure 3-4.8: Branch joint orientation

Notes for installers



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Содержание MVi-200WV2RN1

Страница 1: ...Commercial Air Conditioners R410A Engineering Data MVi 200WV2RN1 A MVi 280WV2RN1 A MVi 224WV2RN1 A MVi 335WV2RN1 A MVi 260WV2RN1 A V6 i Series VRF ...

Страница 2: ...V6 i VRF 50Hz 1 CONTENTS CONTENTS Part 1 General Information 3 Part 2 Outdoor Unit Engineering Data 19 Part 3 System Design and Installation 77 ...

Страница 3: ...V6 i VRF 50Hz 2 Midea V6 i Series Engineering Data Book ...

Страница 4: ...V6 i VRF 50Hz 3 Part 1 General Information Part 1 General Information 1 Indoor and Outdoor Unit Capacities 4 2 External Appearance 6 3 Nomenclature 8 4 Combination Ratio 12 5 Selection Procedure 13 ...

Страница 5: ...2 8 9 1 28 28 28 28 28 28 28 28 28 3 6 12 1 25 36 36 36 36 36 36 36 36 36 36 4 5 15 1 6 45 45 45 45 45 45 45 45 45 45 5 6 19 2 56 56 56 56 56 56 56 56 7 1 24 2 5 71 71 71 71 71 71 71 71 71 8 0 27 3 80 80 80 80 80 80 80 9 0 30 3 2 90 90 90 90 90 90 10 0 34 3 6 100 100 11 2 38 4 112 112 112 112 112 14 0 48 5 140 140 140 140 140 16 0 55 6 160 160 160 20 0 68 7 200 200 25 0 85 9 250 250 28 0 96 10 280...

Страница 6: ...tion 1 3 Outdoor Units Table 1 1 5 Outdoor unit capacity range Capacity Model Name 7HP MVi 200WV2RN1 A 8HP MVi 224WV2RN1 A 9HP MVi 260WV2RN1 A 10HP MVi 280WV2RN1 A 12HP MVi 335WV2RN1 A Notes 1 V6 i series outdoor units could not be combined ...

Страница 7: ...r unit appearance One way Cassette Two way Cassette Q1 Q2 Compact Four way Cassette Four way Cassette Q4C Q4 Medium Static Pressure Duct High Static Pressure Duct T2 T1 Wall mounted Ceiling Floor G DL Floor Standing Console F Z 2 1 2 Fresh air processing unit Table 1 2 2 Fresh air processing unit appearance Fresh Air Processing Unit FA ...

Страница 8: ... i VRF 50Hz 7 Part 1 General Information 2 2 Heat Recovery Ventilator Table 1 2 3 Heat recovery ventilator appearance Heat Recovery Ventilator 2 3 Outdoor Units Table 1 2 4 Outdoor unit appearance 7 12HP ...

Страница 9: ...arks 1 MDV Midea VRF 2 D VRF indoor unit 3 28 Capacity index the capacity in kW multiplied by 10 4 Q4 Indoor unit type Q1 One way Cassette Q2 Two way Cassette Q4C Compact Four way Cassette Q4 Four way Cassette T2 Medium Static Pressure Duct T1 High Static Pressure Duct G Wall mounted DL Ceiling Floor F Floor Standing Z Console 5 N1 Refrigerant type N1 R410A 6 E Design code ...

Страница 10: ...dium Static Pressure Duct T1 High Static Pressure Duct G Wall mounted DL Ceiling Floor F Floor Standing Z Console 6 D Series category D DC series 7 H Power supply Omit 1 phase 220 240V 50Hz H 1 phase 220 240V 50 60Hz 8 N1 Refrigerant type N1 R410A 3 1 2 Fresh air processing unit AC Series MDV D 280 T1 N1 FA 1 2 3 4 5 6 Legend No Code Remarks 1 MDV Midea VRF 2 D AC series VRF indoor unit 3 280 Capa...

Страница 11: ...by 10 5 FA Indoor unit type FA Fresh Air Processing Unit 6 D Series category D DC series 7 H Power supply Omit 1 phase 220 240V 50Hz H 1 phase 220 240V 50 60Hz 8 N1 Refrigerant type N1 R410A 3 2 Heat recovery ventilator AC Series HRV 200 1 2 Legend No Code Remarks 1 HRV Heat recovery ventilator 2 200 Airflow in m3 h DC Series HRV D 200 1 2 3 Legend No Code Remarks 1 HRV Heat recovery ventilator 2 ...

Страница 12: ... V2 R N1 A 1 2 3 4 Legend No Code Remarks 1 MV Midea VRF 2 i Individual series 3 280 Capacity index the capacity in kW multiplied by 10 4 W VRF outdoor unit 5 V2 All DC inverter 6 R Power supply R 3 phase 380 415V 50Hz 7 N1 Refrigerant type N1 R410A 8 A Product version code ...

Страница 13: ...ot exceed 30 of the total capacity of the outdoor units and the combination ratio must not exceed 100 Table 1 4 2 Combinations of Indoor and outdoor units Outdoor unit capacity Sum of capacity indexes of connected indoor units standard indoor units only Sum of capacity indexes of connected indoor units fresh air processing units and standard indoor units together Maximum number of connected indoor...

Страница 14: ... temperature and humidity indoor and outdoor Required heat load of each room System peak load Piping length level differences Indoor unit specifications type and quantity Decide indoor unit safety factor Select indoor unit models ensuring that Indoor unit capacity corrected for indoor air temperature WB1 Required heat load Indoor unit safety factor Determine required total heat load on the outdoor...

Страница 15: ...0 7 4 5 1 5 1 4 0 4 0 25 6 14 00 9 3 4 5 4 5 4 1 4 1 26 5 16 00 8 3 3 9 3 9 3 8 3 8 23 7 The maximum piping lengths and level differences in this example are as given in Figure 1 5 2 Figure 1 5 2 System diagram Indoor unit type for all rooms Medium Static Pressure Duct T2 Step 2 Select indoor units In this example a safety factor is not used i e the safety factor is 1 Select indoor unit models usi...

Страница 16: ... 15 7 9 7 15 4 8 8 Abbreviations TC Total capacity kW SHC Sensible heat capacity kW Table 1 5 3 Selected indoor units Room A Room B Room C Room D Room E Peak heat load kW 9 3 5 1 5 1 4 1 4 1 Selected indoor unit MI2 112T2DHN1 MI2 56T2DHN1 MI2 56T2DHN1 MI2 45T2DHN1 MI2 45T2DHN1 Corrected TC kW 10 5 5 3 5 3 4 2 4 2 Step 3 Select outdoor unit Determine the required total heat load from the indoor uni...

Страница 17: ...ity of the outdoor unit a The sum of the indoor unit CIs is 314 and the CI of the 9HP outdoor unit MVi 260WV2RN1 A is 260 so the combination ratio is 314 260 121 b Using the outdoor unit s cooling capacity table interpolate to obtain the capacity B corrected for outdoor air temperature indoor air temperature and combination ratio Refer to Tables 1 5 6 and 1 5 7 Table 1 5 6 Extract from table 2 8 3...

Страница 18: ...nit capacity is provisionally selected Repeat Step 3 Select outdoor unit Determine the required total heat load from the indoor units to the outdoor unit based on either the sum of the peak loads of each room or the system peak load In this example it is determined based on the system peak load Therefore the required heat load is 26 5kW Provisionally select an outdoor unit using the sum of the cap...

Страница 19: ... the outdoor unit a The sum of the indoor unit CIs is 314 and the CI of the 10HP outdoor unit MVi 280WV2RN1 A is 280 so the combination ratio is 314 280 112 b Using the outdoor unit s cooling capacity table interpolate to obtain the capacity B corrected for outdoor air temperature indoor air temperature and combination ratio Refer to Tables 1 5 10 and 1 5 11 Table 1 5 10 Extract from table 2 8 4 M...

Страница 20: ...nit and outdoor unit For level differences positive values indicate that the outdoor unit is above the indoor unit negative values indicate that the outdoor unit is below the indoor unit d Calculate the corrected capacity of MVi 280WV2RN1 A C by using K1 C B K1 30 01 0 898 26 95kW The corrected capacity 26 95 kW is larger than required total heat load 26 5kW so selection is complete 50 40 40 30 30...

Страница 21: ...V6 i VRF 50Hz 20 Midea V6 i Series Engineering Data Book ...

Страница 22: ...ring Data 1 Specifications 22 2 Dimensions 24 3 Installation Space Requirements 25 4 Piping Diagrams 26 5 Wiring Diagrams 28 6 Electrical Characteristics 29 7 Functional Components and Safety Devices 30 8 Capacity Tables 31 9 Operating Limits 73 10 Sound Levels 74 11 Accessories 76 ...

Страница 23: ...Direct Refrigerant Type R410A Factory charge kg 6 5 6 5 6 5 Pipe connections4 Liquid pipe mm Ф9 53 Ф9 53 Ф9 53 Gas pipe mm Ф19 1 Ф19 1 Ф22 2 Sound pressure level5 dB A 58 58 59 Sound power level5 dB A 78 78 78 Net dimensions W H D mm 1120 1558 528 Packed dimensions W H D mm 1270 1720 565 Net weight kg 143 143 144 Gross weight kg 159 159 160 Ambient Temp operation range Cooling oC 5 48 Heating oC 2...

Страница 24: ...frigerant Type R410A Factory charge kg 6 5 8 Pipe connections4 Liquid pipe mm Φ9 53 Φ12 7 Gas pipe mm Φ22 2 Φ25 4 Sound pressure level5 dB A 60 61 Sound power level5 dB A 78 81 Net dimensions W H D mm 1120 1558 528 Packed dimensions W H D mm 1270 1720 565 Net weight kg 144 157 Gross weight kg 160 173 Ambient Temp operation range Cooling oC 5 48 Heating oC 20 24 Notes 1 Indoor temperature 27 C DB 1...

Страница 25: ...V6 i VRF 50Hz 24 Midea V6 i Series Engineering Data Book 2 Dimensions Figure 2 2 1 Dimensions unit mm 668 206 440 400 528 494 1558 1120 ...

Страница 26: ...le unit installation unit mm For single row installation Figure 2 3 3 Parallel connect the two units or above unit mm Figure 2 3 4 Parallel connect the front with rear sides unit mm 300 600 300 3000 Wall or obstacle Maintain the electric wire and pipeline Air outlet Air inlet Air inlet 600 600 3000 300 600 600 3000 1000 6000 4000 300 ...

Страница 27: ...T3 Heat exchanger temperature sensor 4 Oil separator T4 Outdoor ambient temperature sensor 5 Four way valve T5 Discharge temperature sensor 6 Heat exchanger Tf Heat sink temperature sensor 7 Electronic expansion valve EXV TL Refrigerant cooling pipe temperature sensor 8 Fan SV2 Liquid injection valve 9 Low pressure switch SV4 Oil return valve 10 Accumulator SV7 Refrigerant bypass valve SV2 SV7 T4 ...

Страница 28: ...valve SV2 Protects the compressor If compressor discharge temperature rises above 98 C SV2 opens and sprays a small amount of liquid refrigerant to cool the compressor SV2 closes again once the discharge temperature has fallen below 85 C 6 Solenoid valve SV4 Returns oil to the compressor Opens once the compressor has run for 200 seconds and closes 600 seconds later and then opens for 3 minutes eve...

Страница 29: ...eries Engineering Data Book 5 Wiring Diagrams Figure 2 5 1 Wiring diagram PED MD BOARD CN22 CN23 To centralized controller To kilowatt hour meter Reserved To indoor units communi cation bus CN10 CN30 CN11 PE1 GND1 or shorting stub ...

Страница 30: ...26 4 33 2 32 19 6 2 0 17 2 1 2 1 Abbreviations MCA Minimum Circuit Amps TOCA Total Over current Amps MFA Maximum Fuse Amps MSC Maximum Starting Current A RLA Rated Load Amps FLA Full Load Amps Notes 1 Units are suitable for use on electrical systems where voltage supplied to unit terminals is not below or above listed range limits Maximum allowable voltage variation between phases is 2 2 Select wi...

Страница 31: ...scharge pipe temperature sensor 50 C 50kΩ Crankcase heater 25W 2 Fan motor Safety thermostat On 115 C Off System High pressure switch Off 4 4 0 1 MPa On 3 2 0 1 MPa Low pressure switch Off 0 05 0 05 MPa On 0 15 0 05 MPa High pressure sensor Output voltage V 1 1603 P 0 5 where P is the discharge pressure in MPa Heat exchanger temperature sensor 25 C 10kΩ Outdoor ambient temperature sensor 25 C 10kΩ...

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Страница 63: ...25 15 9 17 25 06 9 28 7 7 6 25 60 8 87 25 51 8 97 25 51 9 07 25 42 9 13 25 42 9 18 25 33 9 29 5 5 6 27 60 9 52 27 50 9 62 27 41 9 73 27 41 9 79 27 41 9 84 27 32 9 96 3 3 7 27 96 10 03 27 87 10 14 27 78 10 25 27 78 10 30 27 69 10 37 27 69 10 49 0 0 7 28 50 10 83 28 41 10 94 28 32 11 06 28 32 11 13 28 32 11 20 28 23 11 26 3 2 2 31 12 10 63 31 12 10 73 31 03 10 85 30 94 10 91 30 94 10 83 28 95 9 75 5...

Страница 64: ... 54 24 70 9 09 23 70 8 66 21 71 7 81 7 7 6 25 33 9 40 25 33 9 49 25 24 9 41 24 70 8 97 23 70 8 54 21 71 7 70 5 5 6 27 32 9 41 27 23 9 50 25 70 9 08 24 70 8 67 23 70 8 27 21 71 7 48 3 3 7 27 69 9 43 27 60 9 51 25 70 9 40 24 70 8 97 23 70 8 56 21 71 7 73 0 0 7 28 23 9 44 27 60 9 52 25 70 9 88 24 70 9 43 23 70 8 99 21 71 8 14 3 2 2 29 59 9 45 27 60 9 35 25 70 8 58 24 70 8 20 23 70 7 82 21 71 7 10 5 4...

Страница 65: ...46 6 47 17 10 5 96 16 47 5 70 15 74 5 46 14 48 4 98 7 7 6 19 72 6 90 18 46 6 38 17 10 5 88 16 47 5 64 15 74 5 39 14 48 4 91 5 5 6 19 72 6 71 18 46 6 22 17 10 5 74 16 47 5 50 15 74 5 27 14 48 4 81 3 3 7 19 72 6 95 18 46 6 44 17 10 5 94 16 47 5 70 15 74 5 46 14 48 4 99 0 0 7 19 72 7 31 18 46 6 77 17 10 6 26 16 47 6 00 15 74 5 75 14 48 5 26 3 2 2 19 72 6 39 18 46 5 94 17 10 5 49 16 47 5 28 15 74 5 06...

Страница 66: ... 27 70 10 52 7 7 6 28 30 10 06 28 20 10 17 28 20 10 28 28 10 10 35 28 10 10 41 28 00 10 53 5 5 6 30 50 10 80 30 40 10 91 30 30 11 03 30 30 11 10 30 30 11 16 30 20 11 30 3 3 7 30 90 11 37 30 80 11 50 30 70 11 62 30 70 11 68 30 60 11 76 30 60 11 89 0 0 7 31 50 12 28 31 40 12 41 31 30 12 54 31 30 12 62 31 30 12 69 31 20 12 77 3 2 2 34 40 12 06 34 40 12 17 34 30 12 31 34 20 12 37 34 20 12 28 32 00 11 ...

Страница 67: ...1 27 70 10 64 27 60 10 74 27 60 10 82 27 30 10 31 26 20 9 82 24 00 8 86 7 7 6 28 00 10 65 28 00 10 75 27 90 10 67 27 30 10 17 26 20 9 68 24 00 8 73 5 5 6 30 20 10 67 30 10 10 77 28 40 10 30 27 30 9 83 26 20 9 38 24 00 8 48 3 3 7 30 60 10 69 30 50 10 78 28 40 10 65 27 30 10 17 26 20 9 70 24 00 8 77 0 0 7 31 20 10 70 30 50 10 79 28 40 11 20 27 30 10 69 26 20 10 20 24 00 9 22 3 2 2 32 70 10 72 30 50 ...

Страница 68: ...40 7 34 18 90 6 76 18 20 6 47 17 40 6 19 16 00 5 64 7 7 6 21 80 7 82 20 40 7 24 18 90 6 67 18 20 6 39 17 40 6 11 16 00 5 57 5 5 6 21 80 7 60 20 40 7 05 18 90 6 50 18 20 6 24 17 40 5 97 16 00 5 45 3 3 7 21 80 7 88 20 40 7 30 18 90 6 73 18 20 6 47 17 40 6 19 16 00 5 66 0 0 7 21 80 8 29 20 40 7 68 18 90 7 10 18 20 6 81 17 40 6 52 16 00 5 96 3 2 2 21 80 7 25 20 40 6 73 18 90 6 22 18 20 5 98 17 40 5 73...

Страница 69: ...3 10 10 75 33 10 10 81 32 98 10 94 7 7 6 33 69 10 46 33 57 10 58 33 57 10 70 33 45 10 76 33 45 10 83 33 33 10 96 5 5 6 36 31 11 23 36 19 11 35 36 07 11 48 36 07 11 54 36 07 11 61 35 95 11 75 3 3 7 36 79 11 83 36 67 11 96 36 55 12 09 36 55 12 15 36 43 12 23 36 43 12 37 0 0 7 37 50 12 77 37 38 12 90 37 26 13 05 37 26 13 12 37 26 13 20 37 14 13 28 3 2 2 40 95 12 54 40 95 12 66 40 83 12 80 40 71 12 86...

Страница 70: ... 98 11 07 32 86 11 17 32 86 11 25 32 50 10 72 31 19 10 21 28 57 9 21 7 7 6 33 33 11 08 33 33 11 19 33 21 11 09 32 50 10 58 31 19 10 07 28 57 9 08 5 5 6 35 95 11 10 35 83 11 20 33 81 10 71 32 50 10 22 31 19 9 75 28 57 8 82 3 3 7 36 43 11 11 36 31 11 21 33 81 11 08 32 50 10 58 31 19 10 09 28 57 9 12 0 0 7 37 14 11 13 36 31 11 22 33 81 11 65 32 50 11 12 31 19 10 61 28 57 9 59 3 2 2 38 93 11 15 36 31 ...

Страница 71: ...6 24 29 7 63 22 50 7 03 21 67 6 72 20 71 6 43 19 05 5 87 7 7 6 25 95 8 13 24 29 7 53 22 50 6 94 21 67 6 65 20 71 6 36 19 05 5 79 5 5 6 25 95 7 91 24 29 7 33 22 50 6 76 21 67 6 49 20 71 6 21 19 05 5 67 3 3 7 25 95 8 20 24 29 7 59 22 50 7 00 21 67 6 72 20 71 6 43 19 05 5 88 0 0 7 25 95 8 62 24 29 7 99 22 50 7 38 21 67 7 08 20 71 6 78 19 05 6 20 3 2 2 25 95 7 54 24 29 7 00 22 50 6 47 21 67 6 22 20 71...

Страница 72: ...andard indoor units at maximum load with the thermostat set to maximum under standard conditions Under partial load conditions there is only a minor deviation from the rate of change in capacity shown in these figures 3 The capacity of the system is either the total capacity of the indoor units obtained from indoor unit capacity tables or the corrected capacity of the outdoor units as per the calc...

Страница 73: ...frosting which has occurred Corrected heating capacity values which take these factors into account can be calculated as follows using the correction factors for frost accumulation given in Table 2 8 5 Table 2 8 11 Correction factor for frost accumulation Heat exchanger inlet port temperature C RH 85 7 5 2 0 2 5 7 Correction factor for frost accumulation 0 94 0 93 0 89 0 84 0 83 0 91 1 00 Correcte...

Страница 74: ...ditions Equivalent piping length 7 5m Level difference 0 50 55 45 40 35 30 25 20 Outdoor temperature o C DB Range for continuous operat i on Range for intermittent operat i on Indoor temperature o C DB 15 10 5 0 5 10 10 15 20 25 30 35 Outdoor temperature o C DB Range for continuous operat i on Range for intermittent operat i on 30 25 20 15 10 5 0 5 10 15 20 25 Indoor temperature o C DB 10 15 20 25...

Страница 75: ...t and H 1000 2mm above the floor in a semi anechoic chamber During in situ operation sound pressure levels may be higher as a result of ambient noise Figure 2 10 1 Sound pressure level measurement unit mm 10 2 Octave Band Levels Figure 2 10 2 7 8HP octave band level Octave band sound pressure level dB A Octave band center frequency Hz 1000 H 1000 2 Front 10 20 30 40 50 60 70 80 90 63 125 250 500 1...

Страница 76: ...ve band level Octave band sound pressure level dB A Octave band center frequency Hz 10 20 30 40 50 60 70 80 90 63 125 250 500 1000 2000 4000 8000 10 20 30 40 50 60 70 80 90 63 125 250 500 1000 2000 4000 8000 NC 70 NC 60 NC 50 NC 40 NC 30 NC 20 Approximate minimum audible limit on continuous noise NC 70 NC 60 NC 50 NC 40 NC 30 NC 20 Approximate minimum audible limit on continuous noise ...

Страница 77: ...Used for outdoor drainage Matched resistor 2 Enhances communication stability Waterproof chassis cover 2 Used for centralized drainage Connection pipe 1 Connecting pipes 11 2 Optional Accessories Table 2 11 2 Optional accessories Optional accessories Model Packed dimensions mm Net gross weight kg Function Indoor branch joint kits FQZHN 01D 290 105 100 0 3 0 4 Distribute refrigerant to indoor units...

Страница 78: ...3 78 2 Unit Placement and Installation 79 3 Refrigerant Piping Design 82 4 Refrigerant Piping Installation 88 5 Drain Piping 99 6 Insulation 102 7 Charging Refrigerant 104 8 Electrical Wiring 106 9 Installation in Areas of High Salinity 109 10 Commissioning 110 11 Appendix to Part 3 System Commissioning Report 112 ...

Страница 79: ...Definitions In this Engineering Data Book the term applicable legislation refers to all national local and other laws standards codes rules regulations and other legislation that apply in a given situation 1 3 Precautions All system installation including installation of piping and electrical works must only be carried out by competent and suitably qualified certified and accredited professionals ...

Страница 80: ...ion treatment for high salinity areas customization option has been added and the precautions described in Part 3 9 Installation in Areas of High Salinity are taken Outdoor units should be installed in well drained well ventilated positions that are as close as possible to the indoor units 2 1 2 Spacing Outdoor units must be spaced such that sufficient air may flow through each unit Sufficient air...

Страница 81: ...r weight bearing support are fully supported Bolt spacings should be as per Figure 3 2 5 A drainage ditch should be provided to allow drainage of condensate that may form on the heat exchangers when the units are running in heating mode The drainage should ensure that condensate is directed away from roadways and footpaths especially in locations where the climate is such that condensate may freez...

Страница 82: ...specifications and quantity of the units delivered are as ordered Check that all accessories ordered have been included Retain the Owner s Manual for future reference Notes for installers Do not remove any packaging before hoisting If units are not packaged or if the packaging is damaged use suitable boards or packing material to protect the units Hoist one unit at a time using two ropes to ensure...

Страница 83: ...ngths and Level Differences The piping length and level difference requirements that apply are summarized in Table 3 3 2 and are fully described as follows refer to Figure 3 3 2 1 Requirement 1 The total length of piping in one refrigerant system should not exceed 150m 2 Requirement 2 The piping between the farthest indoor unit N6 and the outdoor unit should not exceed 100m actual length and 110m ...

Страница 84: ... Requirement 1 above 2 Refer to Requirement 2 above 3 Refer to Requirement 3 above 4 Refer to Requirement 5 above 5 Refer to Requirement 6 above When the outdoor unit connects to one indoor unit the piping length and level difference requirements that apply are summarized in Table 3 3 3 Table 3 3 3 Summary of permitted refrigerant piping lengths and level differences connects to one indoor unit Th...

Страница 85: ...es 3 3 3 and 3 3 4 indicates the larger size Table 3 3 5 Main pipe1 L1 and first indoor branch joint A Capacity of outdoor unit Equivalent length of all liquid pipes and gas pipes 90m Equivalent length of all liquid pipes and gas pipes 90m Gas pipe mm Liquid pipe mm Branch joint kit Gas pipe mm Liquid pipe mm Branch joint kit 7 8HP Φ22 2 Φ9 53 FQZHN 01D Φ25 4 Φ12 7 FQZHN 03D 9 10HP Φ22 2 Φ9 53 FQZ...

Страница 86: ...5 9kW Refer to Table 3 3 3 Indoor main pipe L4 is Φ15 9 Φ9 53 Indoor branch joint D is FQZHN 01D The indoor units N5 and N6 downstream of indoor branch joint E have total capacity of 4 5 5 6 10 1kW Refer to Table 3 3 3 Indoor main pipe L5 is Φ15 9 Φ9 53 Indoor branch joint E is FQZHN 01D The indoor units N3 to N6 downstream of indoor branch joint E have total capacity of 4 5 x 3 5 6 19 1kW Refer t...

Страница 87: ...3 5 Figure 3 3 5 Branch joint spacing and separation from bends unit mm Table 3 3 7 Indoor branch joint dimensions unit mm Model Gas side joints Liquid side joints FQZHN 01D FQZHN 02D FQZHN 03D ID 12 7 ID 15 9 OD 19 1 ID 19 1 OD 19 1 ID 19 1 ID 15 9 ID 12 7 ID 15 9 OD 19 1 OD 12 7 ID 9 5 ID 9 5 ID 6 4 OD 9 5 ID 6 4 OD 9 5 ID 9 5 ID 15 9 ID 19 1 OD 22 2 ID 22 2 OD 22 2 ID 22 2 ID 25 4 ID 15 9 ID 19...

Страница 88: ...f refrigerant in a room following a leak can be calculated as follows Calculate the total amount in of refrigerant in the system A as the nameplate charge the charge in the system when delivered from the factory plus the additional charge added as per Part 3 7 1 Calculating Additional Refrigerant Charge Calculate the total volume B of the smallest room into which refrigerant could potentially leak...

Страница 89: ... with the exception of the final connections to the indoor units That is flushing should be performed once the outdoor unit have been connected but before the indoor units are connected Notes for installers Vacuum drying Joint insulation Pipe insulation Pipe brazing and installation Pipe flushing Gastightness test CLEAN DRY Reasons Particles such as oxide produced during brazing and or building du...

Страница 90: ...g Notes for installers Lubrication oil used during some copper pipe manufacturing processes can cause deposits to form in R410A refrigerant systems causing system errors Oil free copper piping should therefore be selected If ordinary oily copper piping is used it must be cleaned with gauze dipped in tetrachloroethylene solution prior to installation Caution Never use carbon tetrachloride CCl4 for ...

Страница 91: ...laring 1 2H half hard piping anneal the end of the pipe to be flared Remember to place the flare nut on the piping before flaring Ensure the flared opening is not cracked deformed or scratched otherwise it will not form a good seal and refrigerant leakage may occur The diameter of the flared opening should be within the ranges specified in Table 3 4 1 Refer to Figure 3 4 2 Table 3 4 1 Flared openi...

Страница 92: ...refore not be fixed too tightly otherwise stress concentrations may occur in the piping with the potential for rupturing Table 3 4 2 Refrigerant piping support spacings Pipe mm Interval between support points m Horizontal Piping Vertical Piping Ф20 1 1 5 Ф20 Ф40 1 5 2 Ф40 2 2 5 Piping bending methods Hand bending is suitable for thin copper piping Ф6 35mm Ф12 7mm Mechanical bending using a bending...

Страница 93: ...at 0 02 0 03MPa during brazing Start the flow before brazing starts and ensure that the nitrogen continuously passes through the section being brazed until the brazing is complete and the copper has cooled down completely Figure 3 4 4 Flowing nitrogen through piping during brazing Legend 1 Copper piping 2 Section being brazed 3 Nitrogen connection 4 Hand valve 5 Pressure reducing valve 6 Nitrogen ...

Страница 94: ...7 Figure 3 4 7 Piping overlap and gap for brazed joints A D B Brazing Legend A Inner diameter of larger pipe D Outer diameter of smaller pipe B Inlaid depth overlap Table 3 4 3 Piping overlap and gap for brazed joints1 D mm Minimum permissible B mm Permissible A D mm 5 D 8 6 0 05 0 21 8 D 12 7 12 D 16 8 0 05 0 27 16 D 25 10 25 D 35 12 0 05 0 35 35 D 45 14 Notes 1 A B D refer to the dimensions show...

Страница 95: ... units have been connected but before the indoor units are connected Use U shaped branch joints as specified on the construction drawings do not replace U shaped branch joints with tee joints Indoor branch joints may be installed either horizontally or vertically Horizontal branch joints must be installed at an angle to the horizontal not exceeding 10 in order to avoid uneven distribution of refri...

Страница 96: ...t the indoor unit which is furthest from the outdoor unit Indoor unit A in Figure 3 4 9 5 Start to open the nitrogen cylinder valve and gradually increase the pressure to 0 5MPa 6 Allow time for nitrogen to flow as far as the opening at indoor unit A 7 Flush the first opening a Using suitable material such as a bag or cloth press firmly against the opening at indoor unit A b When the pressure beco...

Страница 97: ...auge to check for small leakages If there is a small leakage the pressure gauge will drop distinctly If there are no small leakages charge the piping with nitrogen at 4 2MPa and leave for at least 24 hours to check for micro leakages Micro leakages are difficult to detect To check for micro leakages allow for any change in ambient temperature over the test period by adjusting the reference pressur...

Страница 98: ...es additional leak detection in addition to the gas tightness test The general methods for identifying the source of a leak are as follows 1 Audio detection relatively large leaks are audible 2 Touch detection place your hand at joints to feel for escaping gas 3 Soapy water detection small leaks can be detected by the formation of bubbles when soapy water is applied to a joint 4 Refrigerant leak d...

Страница 99: ... the outdoor unit gas pipe stop valve the red high pressure side hose to the outdoor unit liquid pipe stop valve and the yellow hose to the vacuum pump Step 2 Start the vacuum pump and then open the pressure gauge valves to start vacuum the system After 30 minutes close the pressure gauge valves After a further 5 to 10 minutes check the pressure gauge If the gauge has returned to zero check for le...

Страница 100: ... horizontal drain pipes should not meet at the same level Refer to the Figure 3 5 2 for suitable connection arrangements Such arrangements also allow the slope of the two horizontal pipes to be selected independently Figure 3 5 2 Drain piping joints correct and incorrect configurations Drain pipe Tee joint Drain pipe Tee joint Drain pipe Tee joint Branch drain piping should join main drain piping ...

Страница 101: ...blown back into the drainage pan Traps should be arranged as in Figure 3 5 6 The vertical separation H should be in excess of 50mm A plug may be fitted to allow cleaning or inspection 5 3 Selecting Piping Diameters Select branch drainage piping the drain piping connection to each unit diameters according to indoor unit flow volume and select main drainage piping diameters according to the combined...

Страница 102: ...ed through the air vent or water flow may be impeded Figure 3 5 7 Downward sloping section of drain piping 5 5 Drain Piping Installation Installation of the drain piping should proceed in the following order Caution Ensure that all joints are firm and once the drain piping is all connected conduct a watertightness test and water flow test Do not connect air conditioner drain piping to waste rainwa...

Страница 103: ...th all applicable legislation 6 1 3 Thickness of insulation Minimum thicknesses for refrigerant piping insulation are specified in Table 3 6 1 In hot humid environments the thickness of insulation should be increased over and above the specifications in Table 3 6 1 Table 3 6 1 Refrigerant piping insulation thickness Pipe outer diameter mm Minimum insulation thickness mm Humidity 80 RH Minimum insu...

Страница 104: ... Insulation Use rubber plastic insulating tube with a B1 fire resistance rating The insulation should typically be in excess of 10mm thick For drain piping installed inside a wall insulation is not required Use suitable adhesive to seal seams and joints in the insulation and then bind with cloth reinforced tape of width not less than 50mm Ensure tape is fixed firmly to avoid condensation Ensure th...

Страница 105: ... after performing a gas tightness test and vacuum drying Never charge more refrigerant than required as doing so can lead to liquid hammering Only use refrigerant R410A charging with an unsuitable substance may cause explosions or accidents Use tools and equipment designed for use with R410A to ensure required pressure resistance and to prevent foreign materials from entering the system Refrigeran...

Страница 106: ...rigerant can be charged close the three valves on the pressure gauge run the outdoor unit in cooling mode and then open the yellow and blue valves Continue charging until the full R kg of refrigerant has been charged then close the yellow and blue valves Note Before running the system be sure to complete all the pre commissioning checks as listed in Part 3 10 3 Pre commissioning Checks and be sure...

Страница 107: ...erformance would suffer Additionally liquid refrigerant returning directly to the compressor from the powered off unit would cause liquid hammering potentially damaging the compressor For outdoor unit power wire sizing and circuit breaker sizing refer to Table 2 6 1 in Part 2 6 Electrical Characteristics Caution All installation and wiring must be carried out by competent and suitably qualified ce...

Страница 108: ...istor should be connected between the P and Q terminals After the final indoor unit the communication wiring should NOT be continued back to the outdoor unit that is do not attempt to form a closed loop The P and Q communication wires should NOT be grounded The shielding nets of the communication wires should be connected together and grounded Grounding can be achieved by connecting to the metal c...

Страница 109: ... 8 4 and Table 3 8 1 Caution Communication wiring has polarity Care should be taken to connect the poles correctly Figure 3 8 4 Outdoor unit communication terminals Table 3 8 1 Communication connections Terminals Connection K1 K2 E Connect to outdoor unit monitor O A E Connect to digital energy meter X Y E Connect to indoor unit centralized controller P Q E Connect between indoor units and master ...

Страница 110: ...o install outdoor units outside direct exposure to the sea air should be avoided A canopy should be added to shield the units from sea air and rain Ensure that base structures drain well so that outdoor unit footings do not become waterlogged Check that outdoor unit casing drainage holes are not blocked 9 3 Inspection and maintenance In addition to standard outdoor unit servicing and maintenance t...

Страница 111: ... per instructions 3 All condensate drain piping is complete and a water tightness test has been satisfactorily completed 4 All power and communication wiring is connected to the correct terminals on units and controllers Check that the different phases of the 3 phase power supplies have been connected to the correct terminals 5 No wiring has been connected in a short circuit 6 The power supplies t...

Страница 112: ...re that the crankcase heaters have heated the compressor oil sufficiently 5 Run the system a Run the system in cooling mode with the following settings temperature 17 C fan speed high b After one hour complete Sheet A of the system commissioning report then check the system parameters using the UP DOWN button on the outdoor unit s main PCB and complete the cooling mode columns of one Sheet D and o...

Страница 113: ...i Series Engineering Data Book 11 Appendix to Part 3 System Commissioning Report A total of up to 4 report sheets should be completed for each system One Sheet A one Sheet B and one Sheet C per system One Sheet D per outdoor unit ...

Страница 114: ...Commissioning engineer Outdoor unit information Model Serial no Power supply V COOLING MODE PARAMETER RECORD After running in cooling mode for one hour OUTDOOR UNIT Compressor suction pipe temperature Current A System pressure at check port Within normal range INDOOR UNITS Sample of over 20 of the indoor units including the unit farthest from the outdoor unit Room no Model Address Set temp C Inlet...

Страница 115: ...ommissioning engineer Outdoor unit information Model Serial no Power supply V COOLING MODE PARAMETER RECORD After running in heating mode for one hour OUTDOOR UNIT Compressor suction pipe temperature Current A System pressure at check port Within normal range INDOOR UNITS Sample of over 20 of the indoor units including the unit farthest from the outdoor unit Room no Model Address Set temp C Inlet ...

Страница 116: ...me RECORD OF ISSUES SEEN DURING COMMISSIONING No Description of observed issue Suspected cause Troubleshooting undertaken Serial no of relevant unit 1 2 3 OUTDOOR UNIT FINAL CHECKLIST SW2 system check performed Any abnormal noise Any abnormal vibration Fan rotation normal Commissioning engineer Dealer Midea representative Name Signature Date ...

Страница 117: ...Actual value value displayed 13 EXVA position Actual value value displayed 8 14 Actual current A Actual value value displayed 15 Inverter compressor current A Actual value value displayed 16 Actual voltage V Actual value value displayed 17 DC bus voltage V Actual value value displayed 18 Indoor heat exchanger pipe T2 T2B temperature C Actual value value displayed 19 Priority mode Refer to Note 3 2...

Страница 118: ...ing 6 Midea Avenue Shunde Foshan Guangdong China Postal code 528311 Tel 86 757 26338346 Fax 86 757 22390205 hbt midea com www midea group com Note Product specifications change from time to time as product improvements and developments are released and may vary from those in this document ...

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