Midea V4 Plus Technical & Service Manual
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Midea V4 Plus Technical & Service Manual

Water cooled vrf, 3 phase, 380-415v, 50hz
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Technical Service Manual
V4 Plus
Water Cooled VRF
Model:
3 phase, 380-415V, 50Hz
MDVS-252(8)W/DRN1
MDVS-280(10)W/DRN1
MDVS-335(12)W/DRN1

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Summary of Contents for Midea V4 Plus

  • Page 1 Technical Service Manual V4 Plus Water Cooled VRF Model: 3 phase, 380-415V, 50Hz MDVS-252(8)W/DRN1 MDVS-280(10)W/DRN1 MDVS-335(12)W/DRN1...
  • Page 2 Contents 001 Part 1 General Information 010 Part 2 Selection Procedure 015 Part 3 Specifications & Performances 170 Part 4 Installation 198 Part 5 Troubleshooting...

  • Page 3: Table Of Contents

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Part 1 General Information 1. V4+W VRF system introduction ............. 2 2. Features ....................2 3. Main units lineup ..................6 4. Indoor units lineup .................. 6 5. Nomenclature ..................9...

  • Page 4: V4+W Vrf System Introduction

    1. V4+W VRF system introduction Midea water source heat pump central air-conditioning system is a kind of VRF air-conditioning system which uses water as the cold/heat source. In this system, water is transported from the cold/heat source to the main unit through the water pipe, after the heat exchange between water and the refrigerant, main unit will send the refrigerant to indoor units.
  • Page 5 In the modern large-scale buildings, the load between the internal and external areas is different. It may occur situations that both cooling and heating are required. The V4 PLUS W series modular design, not only can realize meticulous system division in different areas but also can realize heat recovery at the same time, significantly improved energy efficiency.
  • Page 6 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 2.3 High reliability 2.3.1 Cycle duty operation V4+W intelligent control, according to the system load, cyclically changes start-up sequence of multiple main units, equalizes compressor duty and extends operation life-span.
  • Page 7 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 2.4 Enhanced comfort 2.4.1 Low noise Without outdoor units fan noise and fully enclosed design which realize lower noise. 2.5 Easy installation and service 2.5.1 Compact and lightweight 8,10,12HP three basic model with the same size and weight: W780mm×H1000mm×D550mm, 146kg.

  • Page 8: Main Units Lineup

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3. Main units lineup 8, 10, 12 HP 16 ,18 ,20, 22, 24 HP 26, 28, 30, 32, 34, 36 HP Main unit combinations Capacity Recommend combination Max. indoor Model (HP) units nos.
  • Page 9 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz (×100W) Four-way cassette & Compact four-way One-way cassette Two-way cassette Four-way cassette cassette silent type Duct unit Low static A5 duct High static pressure duct Capacity pressure duct (×100W) Indoor units lineup Capacity Floor-standing/Ceiling &...
  • Page 10 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 (×100W) Cased floor-standing Uncased floor-standing Ceiling & floor console Wall mounted/Fresh air processing unit Wall mounted Wall mounted Wall mounted Capacity Fresh air processing unit (S panel) (M panel) (R panel) (×100W)

  • Page 11: Nomenclature

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5. Nomenclature 5.1 Main unit MDV S – 252 (8) W / D R N1 Refrigerant type N1:R410A Omit for R22 Power Supply R: 380~415V, 50Hz, 3N Inverter Type D:DC Inverter Omit for AC Inverter...
  • Page 12 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Part 2 Selection Procedure 1. Introduction ................... 11 2. Unit Selection (Based on cooling load) ..........14 Selection Procedure...
  • Page 13 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 1. Introduction 1.1 Model selection procedure Select the model and calculate the capacity for each refrigerant system according to the procedure shown below.  Calculate the indoor air-conditioning load, calculate the maximum air-conditioning load for each room or zone.
  • Page 14 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 1.3 Outdoor unit selection Allowable combinations are indicated in INDOOR UNIT COMBINATION TOTAL CAPACITY INDEX TABLE. In general, outdoor unit can be selected as follows though the location of the unit, zoning and usage of the rooms may be considered.
  • Page 15 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 1.5 Variation in capacity in accordance with the length of refrigerant pipe 1.5.1 Cooling capacity modification Modification coefficient of the length and high difference of refrigerant pipe: L: Refrigerant pipe equivalent length H: Height difference between outdoor and indoor unit.
  • Page 16 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 2. Unit Selection (Based on cooling load) 2.1 Given condition  Design condition (Cooling: Indoor 20° C (WB), Outdoor 35° C (DB))  Cooling load: Location Room A Room B...
  • Page 17 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Part 3 Specification & Performance 1. Specifications ..................16 2. Dimensions .................... 18 3. Piping diagrams ..................18 4. Electric Characteristics ................ 20 5. Electric wiring ..................21 6. Capacity Tables ..................28 7.

  • Page 18: Specifications

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 1. Specifications MDVS-252(8)W/ MDVS-280(10)W/ MDVS-335(12)W Model DRN1 DRN1 /DRN1 Power supply V-Ph-Hz 380~415V 3Ph ~ 50Hz Capacity 25200 28000 33500 Cooling (*1) Input 4800 6100 8000 5.25 4.59 4.19 Capacity...
  • Page 19 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Total pipe length The farthest pipe length(actual) The farthest pipe length (equivalent) The farthest equivalent pipe 40(90) length from the first distributor (*5) Max. Vertical pipe length (When main units is above) Max.

  • Page 20: Dimensions

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 2. Dimensions 8HP/10HP/12HP (unit: mm) 3. Piping diagrams Symbol Description TSC1 Electronic expansion valve Electromagnetic valve TSC2 EXVA Pressure relief valve Way valve EXVB Filter Pressure sensor Pressure Switch Temperature probe...
  • Page 21 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Remark: TSC1: water outlet temp. of upper pipe TSC2: water outlet temp. of lower pipe TSJ: water inlet temp. of double-pipe heat exchanger T5: inverter module temp. Pc: discharge pressure Ps: suction pressure T7: discharge temp.

  • Page 22: Electric Characteristics

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 4. Electric Characteristics Main unit Power Supply Compressor Model Voltage Min. Max. TOCA MDVS-252(8)W/DRN1 380-415 18.6 MDVS-280(10)W/DRN1 380-415 18.6 MDVS-335(12)W/ DRN1 380-415 20.9 12.1 Remark: MCA: Min. Current Amps. (A) TOCA: Total Over-current Amps.

  • Page 23: Electric Wiring

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5. Electric wiring 5.1 Wiring diagram for 8,10,12HP 202095190760 IC22 Code DCCT1 Name COMP I NV Inverter compressor （ ） FAN1,FAN2 Cooling fan of control box Main 4-way valve (THE S ET TING OF E NC2 I S NOT ALLOWE D TO ALTE R DISCRE TIONAR ILY.)
  • Page 24 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 5.2 Terminal base function Communication switching plate XT1 powerline terminal Grounding terminal XT2 water flow switch XT3 water pump ON/OFF signal input ON/OFF signal ouput Electric control box diagram Note: Never apply line voltage to communication switching plate and XT2 water flow switch ON/OFF signal input terminal.
  • Page 25 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5.3 Signal wire of indoor/main units Signal wire of indoor/main unit adopts 3-core shielded wire (≥0.75mm2) which has polarity, please connect it correctly. Main unit Main unit Main unit (master unit)
  • Page 26 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 5.4.2 Water pump ON/OFF signal wiring 1)Each unit has configured a dry contact terminal for central control of the water pump (see Fig.3-3),this terminal cannot be connected to power terminal of the water pump directly, only should be connected to the control terminal of the water pump starter.
  • Page 27 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5.5 Example for power wire connection 5.5.1 A water circuit for single system wiring Specification & Performance...
  • Page 28 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 5.5.2 A water circuit for several systems wiring Note: 1. The signal connecting line between main units, indoor and main units and indoor units has polarity. When connecting, be careful to prevent error connection.
  • Page 29 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5.6 Electric specifications of main units Main unit Power Supply Compressor Model Voltage Min. Max. TOCA MDVS-252(8)W/DRN1 380-415 18.6 MDVS-280(10)W/DRN1 380-415 18.6 MDVS-335(12)W/ DRN1 380-415 20.9 12.1 Remark: MCA: Min. Current Amps. (A) TOCA: Total Over-current Amps.

  • Page 30: Capacity Tables

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 6. Capacity Tables 8HP cooling mode Indoor Air temperature (° CWB) Water Flow Inlet water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 CR(%) Rate ΔT ΔT ΔT ΔT ΔT ΔT ΔT...
  • Page 31 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP cooling mode Indoor Air temperature (° CWB) Water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water CR(%) Rate ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) (L/min) kW kW °...
  • Page 32 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP cooling mode Indoor Air temperature (° CWB) Water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water CR(%) Rate ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) (L/min) kW kW °...
  • Page 33 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP cooling mode Indoor Air temperature (° CWB) Water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water CR(%) Rate ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) (L/min) kW kW °...
  • Page 34 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP cooling mode Indoor Air temperature (° CWB) Water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water CR(%) Rate ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) (L/min) kW kW °...
  • Page 35 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP heating mode Indoor Air temperature (° CDB) Water Inlet water Flow 16.00 18.00 20.00 21.00 22.00 24.00 △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 36 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP heating mode Indoor Air temperature (° CDB) Water Inlet water Flow 16.00 18.00 20.00 21.00 22.00 24.00 △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 37 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP heating mode Indoor Air temperature (° CDB) Water Inlet water Flow 16.00 18.00 20.00 21.00 22.00 24.00 △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 38 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP heating mode Indoor Air temperature (° CDB) Water Inlet water Flow 16.00 18.00 20.00 21.00 22.00 24.00 △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 39 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP heating mode Indoor Air temperature (° CDB) Water Inlet water Flow 16.00 18.00 20.00 21.00 22.00 24.00 △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 40 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP cooling mode Indoor Air temperature (° CWB) Inlet Water water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp. Rate (° C) (L/min) °...
  • Page 41 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP cooling mode Indoor Air temperature (° CWB) Inlet Water water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp. Rate (° C) (L/min) °...
  • Page 42 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP cooling mode Indoor Air temperature (° CWB) Inlet Water water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp. Rate (° C) (L/min) °...
  • Page 43 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP cooling mode Indoor Air temperature (° CWB) Inlet Water water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp. Rate (° C) (L/min) °...
  • Page 44 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP cooling mode Indoor Air temperature (° CWB) Inlet Water water Flow 14.00 16.00 18.00 19.00 20.00 22.00 24.00 ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp. Rate (° C) (L/min) °...
  • Page 45 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 46 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 47 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 48 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 49 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow △T △T △T △T △T △T Temp.(° C) Rate (L/min) ° C °...
  • Page 50 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 51 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 52 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 53 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 54 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 55 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow CR (%) △T △T △T △T △T △T Temp.(° C) Rate (L/min) °...
  • Page 56 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow CR (%) △T △T △T △T △T △T Temp.(° C) Rate (L/min) °...
  • Page 57 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow CR (%) △T △T △T △T △T △T Temp.(° C) Rate (L/min) °...
  • Page 58 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow CR (%) △T △T △T △T △T △T Temp.(° C) Rate (L/min) °...
  • Page 59 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water Flow CR (%) △T △T △T △T △T △T Temp.(° C) Rate (L/min) °...
  • Page 60 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 61 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 62 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 63 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 64 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 65 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow CR (%) △T △T △T △T △T △T Temp.(° C) rate [L/min] °...
  • Page 66 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow CR (%) △T △T △T △T △T △T Temp.(° C) rate [L/min] °...
  • Page 67 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow CR (%) △T △T △T △T △T △T Temp.(° C) rate [L/min] °...
  • Page 68 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow CR (%) △T △T △T △T △T △T Temp.(° C) rate [L/min] °...
  • Page 69 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow CR (%) △T △T △T △T △T △T Temp.(° C) rate [L/min] °...
  • Page 70 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 71 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 72 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 73 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 74 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+8HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR(%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 75 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 76 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 77 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 78 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 79 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+8HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 80 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 81 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 82 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 83 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 84 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
  • Page 85 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 86 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 87 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 88 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 89 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 90 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 91 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 92 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 93 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 94 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 95 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
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  • Page 97 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 98 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 99 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 100 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
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  • Page 104 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow CR (%) ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) °...
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  • Page 107 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
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  • Page 109 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 110 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 8HP+8HP+10HP cooling mode Indoor Air temperature (° CWB) Water 14.00000 16.00000 18.00000 19.00000 20.00000 22.00000 24.00000 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
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  • Page 115 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8HP+8HP+10HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
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  • Page 157 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 158 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 10HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 159 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 10HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 160 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 161 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 162 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 163 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 164 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP+12HP cooling mode Indoor Air temperature (° CWB) Water 14.00 16.00 18.00 19.00 20.00 22.00 24.00 Inlet water Flow ΔT ΔT ΔT ΔT ΔT ΔT Temp.(° C) Rate (L/min) ° C °...
  • Page 165 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 166 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 167 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 168 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 12HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...
  • Page 169 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 12HP+12HP+12HP heating mode Indoor Air temperature (° CDB) Water 16.00 18.00 20.00 21.00 22.00 24.00 Inlet water flow △T △T △T △T △T △T Temp.(° C) rate [L/min] ° C °...

  • Page 170: Accessories

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 7. Accessories 7.1 Standard accessories Name Quantity Purpose Main unit installation manual Main unit owner’s manual Be sure to deliver it to the customer Indoor unit owner’s manual Be sure to deliver it to the customer User’s guideline...

  • Page 171: Functional Parts And Safety Devices

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 8. Functional parts and safety devices Item Symbol Capacity 10HP 12HP Inverter Inverter compressor E655DHD-65D2YG E655DHD-65D2YG E655DHD-65D2YG Safety Compressor Current protection board MDV-POWER-50A(IR341)-1 Crank case heater DJRD-520A-1500-27.6W Water inlet temp. of double-pipe B:4100，R(25℃)：10KΩ...
  • Page 172 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Part 4 Installation 1. Precautions ..................171 2. Main units installation ................. 172 3. Water system installation ..............177 4. Refrigerant pipe engineering .............. 184 5. Trial run ....................193...

  • Page 173: Precautions

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 1. Precautions  Be sure only trained and qualified service personnel to install, repair or service the equipment. Improper installation, repair, and maintenance may result in electric shocks, short-circuit, leaks, fire or other damage to the equipment.

  • Page 174: Main Units Installation

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 2. Main units installation 2.1 Main unit combination Mode Qty. of indoor unit Mode Qty. of indoor unit 8HP×1 12HP×2 10HP×1 8HP×2+10HP 12HP×1 10HP×2+8HP 8HP×2 10HP×3 10HP+8HP 10HP×2+12HP 10HP+10HP 12HP×2+10HP 10HP+12HP 12HP×3...
  • Page 175 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 2.4 Hoisting main unit  It is banned to take wooden cork base as the force bearing point of lifting up the unit during hoisting, the correct method is use the braces or lifting ropes which can bear the unit’s weight and go through the lifting holes of the front and back bottom plates in the unit for hoisting.
  • Page 176 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Position illustration of screw bolt (Unit: mm) (Unit: mm) 8,10,12 SIZE Centering position illustration of each connective pipe (Unit: mm) Installation...
  • Page 177 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 2.6 Main units’ placement sequence & master and slave units’ settings A system, which provide with more than two main units, will be set as the followings method: The main units in this system should place sequentially from the large to the small capacity;...
  • Page 178 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Installation space of several main units CAUTION: When install several main units, please reserve the top maintenance space as the single main unit installation. Installation...

  • Page 179: Water System Installation

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3. Water system installation 3.1 Basic requirements of connection of chilled water pipes CAUTION: •After the unit is in place, chilled water pipes can be laid. •The relevant installation regulations should be abided with when conducting connection of water pipes.
  • Page 180 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Model Rated water flow volume(m3/h) 10HP 12HP WARNING: •The water pipes network including water filters and heat exchangers should be periodically cleaned, otherwise, dreg or dirt may seriously damages the heat exchangers and water pipes.
  • Page 181 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz WARNING: It is needed to block the water outlet in the side which do not need to be connected with drainage pipes with water outlet plug and seal ring, otherwise the condensed water produced during the system operation will drain near the installation place, to cause inconvenience.
  • Page 182 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Direction schematic diagram of water system pipes Symbols description Gate valve Thermometer Pressure gage Motorized valve Water flow switch Drainage valve As the above Fig.3-5, when horizontal installing the water system main water inlet pipe and main water return pipe, the water inlet branch pipe and water return branch pipe which connected with the unit must be separate connected from the vertically lower direction of main water inlet pipe and main water return pipe;...
  • Page 183 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz flow switches. 4) Special grounding screws should be used for earth connection. Bolts should not be installed or removed at will; otherwise flow switches may suffer deformation and failure. 5) Flow switches have been set at minimal flow value prior to ex-factory. They should not be adjusted below the ex-factory setting value, or they may suffer failure.
  • Page 184 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.6.2 Double-pipe heat exchanger cleaning Cleaning system schematic diagram of double-pipe heat exchanger 3.6.2.1 Preparation of cleaning liquor: 1) The material of water side double-pipe is red copper, and for general corrosion situation it is suggested that use the pickle liquor with 5% oxalic acid, 1.2% buffer and 0.8%surfactant, and the temperature should be...
  • Page 185 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz method will be big different, the above method is only for reference. •The double-pipe heat exchanger is internal thread red copper pipe, so that it cannot use nitric acid as cleaning agent! •The cleaning liquor and neutralization will be irritated and corrosive to human eyes and skin, so please do...

  • Page 186: Refrigerant Pipe Engineering

    R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 4. Refrigerant pipe engineering 4.1 Length and drop height permitted of the refrigerant piping Table.4-1 Permitted value piping L1+(L2+L3+ L 4+L5+L6+L7+ 300m Total pipe length (Actual) L8+L9)×2+a+ (Note1) b+c+d+e+f+g+ h+i+j...
  • Page 187 Fig.4-2 CAUTION: 1. All branch pipes must apply the branch pipes specified by Midea, otherwise, that will cause serious error of the system! 2. Indoor units should be placed as equally as possible at the both sides of the U-shape branch pipe.
  • Page 188 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 4.2 Select the Refrigerant Piping Type Table.4-3 Pipe name Code (As per the Fig. 4-2) Main pipe Indoor unit main pipe L2~L9 Indoor unit aux. pipe a, b, c, d, e, f, g, h, i, j...
  • Page 189 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Table.4-5 Size of joint pipes for 410A main unit Model When the equivalent length of all liquid pipes < 90m, the size of main pipe(mm) Gas side Liquid side The 1st branching pipe Φ22.2...
  • Page 190 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Table.4-9 Main unit multi-connective pipe assembly Main unit Qty. Main unit connective pipe Parallel connect with the branching pipes Main pipe diameter 2 units g1, g2: Refer to 8, 10HP: Φ25.4/Φ12.7;...
  • Page 191 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz your selection, final confirm the main pipe diameter is: gas/liquid pipeΦ38.1/Φ22.2. D Parallel connect the main units 1) The main unit linked by Pipe g1 is 8HP, parallel connects with main unit. the connective pipe diameter to be selected according to its connector size isΦ25.4/Φ12.7;The main unit linked by Pipe g2 is 8HP, parallel...
  • Page 192 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 CAUTION: 1. Pressurized nitrogen（3.9MPa）is used for air tightness test. 2. It is not allow to use oxygen, combustible gas or toxic gas to conduct the air tightness test. 3. When welding, please use wet cloth insulating the low pressure valve for protection.
  • Page 193 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz CAUTION: 1.Don’t mix up the different refrigerants or abuse the tools and measurements which directly contact with refrigerants 2.Don’t adopt refrigerant gas for air vacuuming. 3. If vacuum level could not get to -0.1MPa, please check whether resulted by leakage and confirm the leakage site.
  • Page 194 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 × Wrong Way × Wrong Way 3) The branching pipe must be installed horizontally, error angle of it should not large than 10° . Otherwise, malfunction will be caused. Installation...

  • Page 195: Trial Run

    MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 5. Trial run 5.1 Inspection and confirmation before commissioning 1) Check and confirm that refrigeration pipe line and communication wire with indoor and main unit have been connected to the same refrigeration system. Otherwise, operation troubles shall happen.
  • Page 196 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 5.4 Caution on refrigerant leakage 1) This air conditioner adopts R410A as refrigerant, which is safe and noncombustible. 2) The room for air conditioner should be big enough that refrigerant leakage can not reach the critical thickness.
  • Page 197 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Commissioning Report for Midea MDV Pro System Date:dd mm yy Item name: Address: Tel: Supplier: Delivery date: dd mm yy Installation section: Principal: Commissioning section: Principal: Remark: recharged refrigeration quantity to system: kg...
  • Page 198 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Test Data for Test Run of __________System Model of main unit Production series no. Operation data of main unit (Cooling) Unit No.1 No.2 No.3 Run Voltage V Total current of run A...
  • Page 199 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz System parameter SW1: (CHECK)――Used to query main unit data. Check point sequence and corresponding actuality is as follows: Display content Note Display content Remark TSC1, water outlet temp. of Main unit address...
  • Page 200 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Part 5 Troubleshooting 1. Normal air conditioner phenomenon ..........199 2. Air conditioner protection in common ..........199 3. Malfunction code and troubleshooting ..........200 Troubleshooting...
  • Page 201 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 1. Normal air conditioner phenomenon 1.1 When main unit appears white vapor or water, the reasons is as follows: 1) The fan of main unit stops to begin defrosting. 2) The electromagnet valve sends out the noise when the defrosting begins and ends.
  • Page 202 If there is phenomenon as follows, please stop air conditioner running and cut power supply and refer to the following. However, if the problem insists, please contact the customer service center of Midea commercial air conditioner company, and offer machine’s model and detailed malfunction.
  • Page 203 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.1 E0: Communication error between main units E0: Communication error between main units ODU addresses (ENC1) are set incorrectly (the master unit address should be set as 0, slave Reset the ODU addresses...
  • Page 204 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.2 E1：Phase sequence error E1: Phase sequence error The 3-phase sequence of power supply is wrong. (The A, B, C terminal of three-phase power supply should meet compressor phase Exchange any two of the sequence requirement.
  • Page 205 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.3 E2: Communication error between indoors and the master unit E2: Communication error between indoors and the master unit Communication wires P, Q, E are Reconnect the communication short circuit or disconnected (Measure...
  • Page 206 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.3 E8: Main unit address error E8: Main unit address error The ODU's address is more than 3 or The addresses should be set less than 3 and differently be set repeatedly The communication wires H1, H2 and E are short circuit or disconnected.
  • Page 207 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.5 H0: Communication error between main control chip and inverter driver chip; H1: Communication error between main control chip and communication chip H0/H1 Power supply main Provide normal power supply...
  • Page 208 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.7 H7: Quantity of indoor units decrease error H7: Quantity of indoor units decrease error Fasten the communication Communication terminals P Q E terminals are loose Some IDU are assigned the...
  • Page 209 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.8 H8: High pressure sensor error When the discharge pressure is lower than 0.3MPa, the system will display H8 error, the ODU in standby. When the discharge pressure is back to normal, H8 disappears and normal operation resumes.
  • Page 210 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.9 P0: Top temperature protection of inverter compressor; P4: Discharge temperature protection; H6: P4 protection appears three times in 100 minutes H6 error cannot resume automatically, and it can resume only by restarting the machine.
  • Page 211 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.10 P1: High pressure protection When the pressure is over 4.4MPa, the system will display P1 protection, the ODU in standby. When the pressure is lower than 3.2MPa, P1 disappears and normal operation resumes.
  • Page 212 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.11 P2/H5: Low pressure protection When the pressure is lower than 0.05MPa, the system will display P2 protection, the ODU in standby. When the pressure is higher than 0.15MPa, P2 disappears and resumes normal operation.
  • Page 213 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.12 P3: Over current protection of compressor When the current of inverter compressor is over12A, the system will display P3 protection, the ODU in standby. When the current goes back to normal range, P3 disappears and normal operation resumes.
  • Page 214 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.13 P6: Inverter module protection; H4: P6 protection appears three times in 60 minutes When the system displays H4 error code, the system can resume only by restarting the machine. At this time, malfunction should be disposed promptly to avoid further damage.
  • Page 215 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 1) L0 troubleshooting Step 1: Compressor check Measure the resistance between each two of U, V, W terminals of the compressor, all the resistance should be the same and equal to 0.9~5 Ohms. (Fig. A and Fig. B) Measure the resistance between each of U, V, W terminals of the compressor to ground (Fig.
  • Page 216 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 2) L1/L4 troubleshooting Step 1: Check the DC voltage between 1 and 2 terminal, the normal value should be 510V~580V, if the voltage is lower than 510V, go to step 2.
  • Page 217 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3) L2 troubleshooting Step 1: Check the DC voltage between 1 and 2 terminal, the normal value should be 510V~580V, if the voltage is higher than 580V, go to step 2.
  • Page 218 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 Extend the power line of the inverter compressor of system B, connect compressor A to the control box of system B, make sure that the U, V, W terminals are connected in right order, then start system B.
  • Page 219 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz black, feculent, or even there is impurity in the oil, that means the system has problems and the oil has gone bad, the oil need to be replaced. The oil is black, it has been...
  • Page 220 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 The crankshaft is worn. The crankshaft is The scroll plate of the The scroll plate is worn. A normal bearing The bearing is worn seriously, The bearing is worn seriously,...
  • Page 221 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz Step 3: Replace the compressor Pour out some oil from compressor; check The oil is clean the quality of the oil The oil is dirty Pour out all of the oil from the compressor,...
  • Page 222 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 low-pressure accumulator. 3. Add oil to the compressor from the discharge pipe. The discharge pipe is connected to the oil pool of the compressor by the inner oil balance pipe, add oil from the discharge pipe with a funnel 4.
  • Page 223 MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz 3.15 C5: TSJ temperature too high or too low protection Max(TSJ)＞50 C or Min(TSJ)＜5 maximum outlet water Adjustment of water temperature temperature too high or minimum and water flow outlet water temperature is too low...
  • Page 224 R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04 3.16 C7: Temperature protection of inverter module When the temperature of inverter module is over 80 C, it will display C7 protection. Temperature sensor of main inverter module is short circuit Replace the sensor or disabled①.
  • Page 225 Commercial Air Conditioner Division Midea Group Address: Midea Headquarters Building, 6 Midea Avenue, Beijiao, Shunde, Foshan, Guangdong, China Midea CAC After-service Application Midea CAC News Application Postal code: 528311 Tel: +86-757-26338346 Fax: +86-757-22390205 cac.midea.com global.midea.com Note: The data in this book may be changed without notice for further improvement on...

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