Midea M thermal Mono Series Engineering Data
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Midea M thermal Mono Series Engineering Data

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Commercial Air Conditioners
Engineering Data
M thermal A Series Mono(18~30kW)
Midea CAC Confidential

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  • Page 1 Commercial Air Conditioners Engineering Data M thermal A Series Mono(18~30kW) Midea CAC Confidential...
  • Page 2 M thermal Mono CONTENTS Part 1 General Information ................3 Part 2 Engineering Data ................17 Part 3 Installation and Field Settings ............35 201910 Midea CAC Confidential...
  • Page 3 M thermal Mono 201910 Midea CAC Confidential...

  • Page 4: Table Of Contents

    M thermal Mono Part 1 General Information 1 M thermal Mono System ................4 2 Unit Capacities ................... 6 3 Nomenclature .................... 6 4 System Design and Unit Selection .............. 7 5 Typical Applications ................... 9 202005 Midea CAC Confidential...

  • Page 5: Thermal Mono System

    The backup electric heater also serves as a backup in case of heat pump malfunction and for anti-freeze protection of the outside water piping in winter. 202005 Midea CAC Confidential...
  • Page 6  Enables selection of lower capacity heat pump.  Ideal for refurbishments and upgrades. Figure 1-1.2: System configurations 202005 Midea CAC Confidential...

  • Page 7: Unit Capacities

    Appearance 3 Nomenclature Refrigerant N8: R32 Power Supply R: 3-phase, 380-415V, 50Hz Compressor and fan motor types D2: All DC Unit category W: Outdoor unit Capacity index The capacity in kW Inverter Mono Heat pump Midea 202005 Midea CAC Confidential...

  • Page 8: System Design And Unit Selection

    If the water outlet design temperature falls between two temperatures listed in the outdoor unit's capacity table, calculate the corrected capacity by interpolation. Select Mono units which should satisfy both total heating and cooling load requirements. 202005 Midea CAC Confidential...
  • Page 9  Connecting room thermostats (field supplied) to the hydronic system helps prevent excessive space heating by stopping the outdoor unit and circulator pump when the room temperature is above the thermostat set point. 202005 Midea CAC Confidential...

  • Page 10: Typical Applications

    Collector / Distributor (field supplied) Stop valve (field supplied) FHL 1...n Floor heating loop (field supplied) Wired controller Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 11 Balance tank (field supplied) P_s: Solar pump(field supplied) Air purge valve FHL 1...n Floor heating loop (field supplied) Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 12 Floor heating loop (field supplied) Drain valve FCU 1…n Fan coil units(field supplied) Expansion vessel (field supplied) Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 13 SV1: 3-way valve (field supplied) Balance tank (field supplied) FHL 1...n Floor heating loop (field supplied) Air purge valve Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 14 Balance tank (field supplied) T1: Outlet water temperature sensor(field supplied) Air purge valve FHL 1...n Floor heating loop (field supplied) Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 15 SV1: 3-way valve (field supplied) Balance tank (field supplied) FHL 1...n Floor heating loop (field supplied) Air purge valve Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 16 FHL 1...n Floor heating loop (field supplied) Drain valve(field supplied) FCU 1...n Fan coil units (field supplied) Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 17 Floor heating loop (field supplied) Drain valve(field supplied) FCU 1...n Fan coil units (field supplied) Fill valve (field supplied) Notes: The example is just for application illustration; please confirm the exact installation method according to the installation manual. 202005 Midea CAC Confidential...
  • Page 18 2 Dimensions and Center of Gravity ............19 3 Piping Diagrams ..................20 4 Wiring Diagrams ..................21 5 Capacity Tables..................22 6 Operating Limits ..................28 7 Hydronic Performance ................29 8 Sound Levels .................... 30 9 Accessories ....................33 202005 Midea CAC Confidential...
  • Page 19 5. Outdoor air temperature 35⁰C DB; EWT 23⁰C, LWT 18⁰C. 6. Outdoor air temperature 35⁰C DB; EWT 12⁰C, LWT 7⁰C. 7. Seasonal space heating energy efficiency class tests in average climate conditions. ：EN12102-1 8. Test standard 202005 Midea CAC Confidential...
  • Page 20 M thermal Mono 2 Dimensions and Center of Gravity Figure 2-2.1: MHC-V18(22, 26,30)W/D2RN8 dimensions and center of gravity (unit: mm) 202005 Midea CAC Confidential...
  • Page 21 Water side heat exchanger water outlet Tw_out temperature sensor Water side heat exchanger water inlet Tw_in temperature sensor Final water outlet temperature sensor Domestic hot water tank temperature sensor Room temperature sensor (Built-in controller) 202005 Midea CAC Confidential...
  • Page 22 M thermal Mono 4 Wiring Diagrams Figure 2-4.1: MHC-V18(22, 26,30)W/D2RN8 wiring diagram 202005 Midea CAC Confidential...
  • Page 23 12774 1712 7.46 12484 1898 6.58 12195 2085 5.85 11905 2271 5.24 11516 2596 4.44 11127 2920 3.81 Abbreviations: LWT: Leaving water temperature (°C ) HC: Total heating capacity (W) PI: Power input (W) Notes: 1.Integrated heating capacity values take account of capacity drops caused by frost accumulation and during defrosting. 202005 Midea CAC Confidential...
  • Page 24 12748 1735 7.35 12458 1923 6.48 12167 2110 5.77 11877 2298 5.17 11536 2619 4.41 11196 2940 3.81 Abbreviations: LWT: Leaving water temperature (°C ) HC: Total heating capacity (W) PI: Power input (W) Notes: 1.Integrated heating capacity values take account of capacity drops caused by frost accumulation and during defrosting. 202005 Midea CAC Confidential...
  • Page 25 12722 1759 7.23 12431 1947 6.38 12140 2136 5.68 11849 2324 5.10 11557 2642 4.37 11264 2959 3.81 Abbreviations: LWT: Leaving water temperature (°C ) HC: Total heating capacity (W) PI: Power input (W) Notes: 1.Integrated heating capacity values take account of capacity drops caused by frost accumulation and during defrosting. 202005 Midea CAC Confidential...
  • Page 26 12696 1782 7.12 12405 1972 6.29 12113 2161 5.61 11821 2351 5.03 11577 2665 4.34 11333 2979 3.80 Abbreviations: LWT: Leaving water temperature (°C ) HC: Total heating capacity (W) PI: Power input (W) Notes: 1.Integrated heating capacity values take account of capacity drops caused by frost accumulation and during defrosting. 202005 Midea CAC Confidential...
  • Page 27 18417 3003 6.13 17071 2806 6.08 25774 2590 9.95 23248 2496 9.31 21354 2425 8.80 20091 2378 8.45 18197 2307 7.89 Abbreviations: LWT: Leaving water temperature (°C ) CC: Total cooling capacity (W) PI: Power input (W) 202005 Midea CAC Confidential...
  • Page 28 19737 3595 5.49 18627 3273 5.69 26544 3815 6.96 23832 3478 6.85 21798 3225 6.76 20442 3057 6.69 18408 2804 6.56 Abbreviations: LWT: Leaving water temperature (°C ) CC: Total cooling capacity (W) PI: Power input (W) 202005 Midea CAC Confidential...
  • Page 29 Shaded areas indicate If IBH/AHS setting is valid, only IBH/AHS turns on. If IBH/AHS setting is invalid, only heat pump turns on. Shaded areas indicate water flow temperature drop or rise interval Shaded areas indicates heat pump runs If the IBH or AHS setting is valid; no heat pump operation if IBH or AHS setting is invalid 202005 Midea CAC Confidential...
  • Page 30 Figure 2-7.1: MHC-V18(22, 26,30)W/D2RN8 hydronic performance Available external static presurre VS Flow rate Ⅲ Ⅱ Ⅰ Flow rate (m Abbreviations: ESP: External static pressure Notes: I, II and III indicate water pump speed: I: Low II: Medium III: High. 202005 Midea CAC Confidential...
  • Page 31 Figure 2-8.1: Sound pressure level measurement (unit: mm) Front 1000 (H+1000)/2 dB(A) is the maximum value tested under the conditions below: Outdoor air temperature 7⁰C DB, 85% R.H.; EWT 30⁰C, LWT 35⁰C. Outdoor air temperature 7⁰C DB, 85% R.H.; EWT 47⁰C, LWT 55⁰C. 202005 Midea CAC Confidential...
  • Page 32 EWT 47⁰C, LWT 55⁰ NR-40 NR-30 Outdoor air temperature 35⁰C DB; NR-20 EWT 12⁰C, LWT 7⁰C NR-10 NR-0 Outdoor air temperature 35⁰C DB; 31.5 1000 2000 4000 8000 EWT 23⁰C, LWT 18⁰C Octave band center frequency (Hz) 202005 Midea CAC Confidential...
  • Page 33 NR-40 NR-30 Outdoor air temperature 35⁰C DB; NR-20 EWT 12⁰C, LWT 7⁰C NR-10 NR-0 Outdoor air temperature 35⁰C DB; 31.5 125 250 500 1000 2000 4000 8000 EWT 23⁰C, LWT 18⁰C Octave band center frequency (Hz) 202005 Midea CAC Confidential...
  • Page 34 H1 and H2 at the terminal of the communication system. 9.2 Optional Accessories Table 2-9.2: Standard accessories Quantity MHC-V18W/D2RN8 Name Shape MHC-V22W/D2RN8 MHC-V26W/D2RN8 MHC-V30W/D2RN8 Thermistor for the backup heater exchanger or AHS outlet water temp.T1 Extension wire for Tw2 or T5 202005 Midea CAC Confidential...
  • Page 35 M thermal Mono 202005 Midea CAC Confidential...
  • Page 36 DIP Switch Settings ................48 Internal Circulation Pump Speed Settings ..........49 User Interface Field Settings ..............51 Operation Parameter ................69 Network Configuration Guidelines ............70 10 Appendix ..................... 74 11 Error Code Table .................. 77 202005 Midea CAC Confidential...

  • Page 37: Preface To Part 3

    The information contained in this Engineering Data Book may primarily be of use during the system design stage of a Midea M thermal Mono project. Additional important information which may primarily be of use during field installation has been placed in boxes, such as the example below, titled “Notes for installers”.

  • Page 38: Installation

    Outdoor units should not be installed in locations where exposure to oil or to corrosive or harmful gases, such as acidic or alkaline gases, may occur. Outdoor units should be installed in well-drained, well-ventilated positions. Outdoor units should be installed in positions that are sufficiently close to the desired position of the wired controller 202005 Midea CAC Confidential...
  • Page 39 Figure 3-2.3 for installation of the unit. If turn the air outlet side toward the building's wall, fence or screen. Make sure there is enough room to do the installation Figure 3-2.2: Strong wind installation direction 202005 Midea CAC Confidential...
  • Page 40 Fix the unit securely to foundation by means of the Φ10 expansion bolt. It is best to screw in the foundation bolts until their length is 20 mm from the foundation surface. 202005 Midea CAC Confidential...
  • Page 41 For more details please refer to the figures below. Figure 3-2.7: Single unit installation (Wall or obstacle) Air inlet >300 Maintain the electric wire and pipeline Air inlet >600 Air outlet 202005 Midea CAC Confidential...
  • Page 42 M thermal Mono Figure 3-2.8: Parallel connect the two units or above >300 >600 >3000 Figure 3-2.9: Parallel connect the front with rear sides >6000 >3000 >1000 >4000 >300 202005 Midea CAC Confidential...

  • Page 43: Water Pipework

    Calculating the pre-pressure of the expansion vessel: The pre-pressure (Pg) to be set depends on the maximum installation height difference (H) and is calculated as Pg(bar)=(H(m)/10+0.3) bar 202005 Midea CAC Confidential...
  • Page 44 Water connections must be made correctly in accordance with the labels on the outdoor unit, with respect to the water inlet and water outlet. If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit: Use clean pipes only. 202005 Midea CAC Confidential...
  • Page 45 Uninhibited glycol will turn acidic under the influence of oxygen. This process is accelerated by presence of copper and at higher temperatures. The acidic uninhibited glycol attacks metal surfaces and forms galvanic corrosion cells that cause severe damage to the system. It is of extreme importance: 202005 Midea CAC Confidential...
  • Page 46 If the outdoor ambient temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the sealing materials should be at least 20mm in order to avoid condensation on the surface of the seal. 202005 Midea CAC Confidential...

  • Page 47: Electrical Wiring

    Most field wiring on the unit is to be made on the terminal block inside the switch box. To gain access to the terminal block, remove the switch box service panel. Fix all cables using cable ties. 202005 Midea CAC Confidential...
  • Page 48 P_s: Solar pump (field supplied) Contactor (field supplied) P_c: Circulation pump / zone 2 pump (field supply) Power supply P_o: Outside circulation pump / zone 1 pump (field supply) SV3: 3-way valve for Zone 2 (field supplied) 202005 Midea CAC Confidential...

  • Page 49: Dip Switch Settings

    Start pumpo after six hours will will be invalid be valid without TBH with TBH 00=variable speed pump (Max head:8.5m) 01=constant speed pump OFF/ON 10=variable speed pump(Max head:10.5m) 11=variable speed pump(Max head:9m) Reserved Reserved Reserved Reserved Reserved OFF/OFF 202005 Midea CAC Confidential...

  • Page 50: Internal Circulation Pump Speed Settings

    Ambient temperature too high Improve room ventilation, check operating conditions, request customer service, if necessary Electronic faults Electronics defective Request customer service * In addition to the LED display, the fault signal LED is continuously illuminated in red. 202005 Midea CAC Confidential...
  • Page 51 In order to ensure the service life of the pump, it is recommended that the unit run at least once every 2 weeks (ensure that the pump is running) or keep it powered on for a long time (in the power-on standby state, the unit will run the pump for 3 minutes every 6 hours) 202005 Midea CAC Confidential...

  • Page 52: User Interface Field Settings

    UNLOCK Unlock /lock some functions such as “DHW temperature adjusting” Go to the next step when programming a schedule in the menu structure and confirm a selection to enter in the submenu of the menu structure. 202005 Midea CAC Confidential...
  • Page 53 M thermal Mono Menu Structure 202005 Midea CAC Confidential...
  • Page 54 DHW PRIORITY mode, when it is available and the space heating/cooling is OFF, the heat pump will heat the water as required. If space heating/cooling is ON, the water will be heated as required when the immersion heater is unavailable. 202005 Midea CAC Confidential...
  • Page 55 T4DHWMIN can take is -25°C, which is the DHW mode lower ambient temperature operating limit of the heat pump. t_INTERVAL_DHW sets the DHW mode compressor re-start delay. When the compressor stops running, it will not re-start 202005 Midea CAC Confidential...
  • Page 56 DHW pump, select ON so that the user is able to set pump start times. PUMP RUNNING TIME sets the length of time the pump runs for at each of the user-specified start times on the DHW 202005 Midea CAC Confidential...
  • Page 57 Figure 3-7.18. dTSC is only applicable if YES is selected for ROOM TEMP in the TEMP. TYPE SETTING menu. Refer to Part 3, 7.8 “TEMP. TYPE SETTING Menu”. t_INTERVAL_C sets the cooling mode compressor re-start delay. When the compressor stops running, it will not re-start until at least t_INTERVAL_C minutes have elapsed. 202005 Midea CAC Confidential...
  • Page 58 (T1) and the heat pump leaving water set temperature (T1S) above which the heat pump provides heated water to the space heating terminals. Note: Only when ROOM TEMP is enabled will this function be available 202005 Midea CAC Confidential...
  • Page 59 AHS: Additional heating source IBH: Backup electric heater T4CMAX: The ambient temperature above which the heat pump will not operate in cooling mode. T4HMIN: The ambient temperature below which the heat pump will not operate in heating mode. 202005 Midea CAC Confidential...
  • Page 60 Figure 3-7.20: Set WATER FLOW TEMP. and ROOM TEMP. to YES; Set DOUBLE ZONE to NON or YES Homepage (zone 1) Addition page (zone 2) (Double zone is effective) 202005 Midea CAC Confidential...
  • Page 61 ROOM THERMOSTAT = NON: No room thermostat. ROOM THERMOSTAT = MODE SET: Room thermostat can control heating and cooling individually. ROOM THERMOSTAT=ONE ZONE: Room thermostat provides the switch signal to unit. ROOM THERMOSTAT=DOUBLE ZONE: Indoor unit is connected with two room thermostat. 202005 Midea CAC Confidential...
  • Page 62 Additional heating source AHS: T4: Outdoor ambient temperature IBH LOCATE means IBH is installed for pipe heating. P_IBH1, P_IBH2 set heating capacity of IBH and P_TBH sets heating capacity of TBH, which are used for energy consumption statistics. 202005 Midea CAC Confidential...
  • Page 63 On selecting YES, the process of restoring all settings to their factory defaults begins and progress is displayed as a percentage. Figure 3-7.29: RESTORE FACTORY SETTINGS screens 10 RESTORE FACTORY SETTINGS 10 RESTORE FACTORY SETTINGS Please wait… All the settings will come back to factory default. Do you want to restore factory settings? CONFIRM 202005 Midea CAC Confidential...
  • Page 64 11 TEST RUN( POINT CHECK) 11 TEST RUN PUMPSOLAR 3-WAY VALVE 1 PUMPDHW 3-WAY VALVE 2 INNER BACKUP HEATER PUMP I TANK HEATER PUMP O 3-WAY VALVE 3 PUMP C ON/OFF ON/OFF ON/OFF ON/OFF ▼ ▲ 202005 Midea CAC Confidential...
  • Page 65 If any error code is displayed during the cool mode running operation, the cause should be investigated. Refer to Part 3, 8.2 “Error Code table”. 202005 Midea CAC Confidential...
  • Page 66 Figure 3-7.37: DHW MODE RUNNING display 11 TEST RUN Test run is on. DHW mode is on. Water flow temper. is 45°C Water tank temper. is 30°C CONFIRM 202005 Midea CAC Confidential...
  • Page 67 During the preheating for floor operation all buttons except OK are inactivated. To exit the preheating for floor operation, press OK and then select YES when prompted. Refer to Figure 3-7.38. 202005 Midea CAC Confidential...
  • Page 68 Note: In the event of a heat pump malfunction, floor drying up mode will continue if a backup electric heater and/or additional heating source is available and configured to support space heating mode. ENTER EXIT ADJUST 202005 Midea CAC Confidential...
  • Page 69 SOLAR INPUT sets whether solar control signal is connected to hydronic PCB. 15.10 RT/Ta_PCB ADJUST F-PIPE LENGTH sets the length of refrigerant pipes between outdoor unit and indoor unit. dTbt2 sets the temperature difference for starting the unit. RT/Ta_PCB sets whether hydronic adapter board is valid. 202005 Midea CAC Confidential...

  • Page 70: Operation Parameter

    230V T2B PLATE F-IN TEMP. 35°C P1 COMP. PRESSURE 2300kPa DC GENERATRIX VOLTAGE 420V Th COMP. SUCTION TEMP. 5°C ODU SOFTWARE 01-09-2018V01 DC GENERATRIX CURRENT Tp COMP. DISCHARGE TEMP. 75°C HMI SOFTWARE 01-09-2018V01 ADDRESS ADDRESS ADDRESS 202005 Midea CAC Confidential...

  • Page 71: Network Configuration Guidelines

    Go to “MENU”> “WLAN SETTING”> “RESTORE WLAN SETTING”, select YES, press OK and wireless configuration is reset. Figure 3-8.2: RESTORE WLAN SETTING menu RESTORE WLAN SETTING Do you want to restore the WLAN setting and exit? 202005 Midea CAC Confidential...
  • Page 72 Scan the following QR code in Figure 3-8.3 or research "MSmartLife" in APP STORE or GOOGLE PLAY to install the APP. Figure 3-8.3: QR code for MSmartLife APP 9.2.2 Sign in After installation, open the APP and click the "+" button to register account according to the guide. Figure 3-8.4: register account 202005 Midea CAC Confidential...
  • Page 73 9.2.3 Add Home Appliances  Choose the wired controller model, then go to add the device.  Operate the wired controller according to APP prompts. Wait for the home appliance to connect, and click “Finish”.  202005 Midea CAC Confidential...
  • Page 74 If the network distribution process fails, or the mobile connection demands reconnection and replacement, operate “RESTORE WLAN SETTING” on the wired controller, and then repeat the above process. Figure 3-8.6: successful connection Figure 3-8.7: failed connection 202005 Midea CAC Confidential...

  • Page 75: Appendix

    It only has the curves of the low temperature setting for heating, if the low temperature is set for heating. Curve 4 is default in low temperature heating mode and curve 6 is default in ECO mode. 202005 Midea CAC Confidential...
  • Page 76 Curve 6 Curve 7 Curve 8 T4(℃) Notes: It only has the curves of the low temperature setting for cooling, if the low temperature is set for cooling. Curve 4 is default in low temperature cooling mode. 202005 Midea CAC Confidential...
  • Page 77 T1SETC2 T1SETH2 T4C1 T4C2 T4H1 T4H2 The setting of T1SETH1, T1SETH2, T4H1, T4H2 refer to Part 3, 8.6” HEATING MODE SETTING Menu” and T1SETC1, T1SETC2, T4C1, T4C2 refer to Part 3, 8.5” COOLING MODE SETTING Menu”. 202005 Midea CAC Confidential...

  • Page 78: Error Code Table

    Low pressure protection （Pe<0.6） occured 3 times in 1 hour in cooling mode Low pressure protection High pressure protection Compressor overcurrent protection Compressor discharge temp. too high protection High Temperature difference protection between water inlet and water outlet of the plate heat exchanger. 202005 Midea CAC Confidential...
  • Page 79 DC bus high voltage protection from DC driver MCE fault Zero speed protection Phase sequence fault Compressor frequency variation greater than 15Hz within 1 second protection Actual compressor frequency differs from target frequency by more than 15Hz protection 202005 Midea CAC Confidential...
  • Page 80 Note: Product specifications change from time to time as product improvements and developments are released and may vary from those in this document. GD MIDEA Heating & Ventilating Equipment Co. Ltd participates in the ECP programme for LCP-HP. Check ongoing validity of certificate: www. eurovent-certification.com...

This manual is also suitable for:

Mhc - v18w/d2rn8Mhc - v22w/d2rn8Mhc- v26w/d2rn8Mhc- v30w/d2rn8

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