Midea H2 Series Technical & Service Manual
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Midea H2 Series Technical & Service Manual

Midea H2 Series Technical & Service Manual

Ac fan coil unit generation two pipe ceiling&floor series
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Midea AC Fan Coil Unit
nd
2
generation Two Pipe Ceiling&Floor Series
Technical Service Manual
Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.

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Summary of Contents for Midea H2 Series

  • Page 1 Midea AC Fan Coil Unit generation Two Pipe Ceiling&Floor Series Technical Service Manual Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.
  • Page 2 Midea AC Fan Coil Unit Generation Two Pipe Ceiling & Floor AC Fan Coil Unit Features ............................2 External Appearance ........................2 Products Lineup..........................2 Nomenclature ..........................3 Specifications ..........................4 Dimensions ..........................39 Sound Levels ..........................40 Service Spaces...........................42 Wiring Diagrams .........................43 Installation ..........................44 10.1 Transport and handling ....................44 10.2 Storage conditions ......................
  • Page 3 Midea AC Fan Coil Unit 1. Features Flexible for installation, designed for horizontal/vertical, concealed/cabinet application Ceiling Installation Floor Installation Concealed Installation Meet CE certification requirements The unit can meet the latest CE certification requirements for using AC fan motor. 2. External Appearance...
  • Page 4 Midea AC Fan Coil Unit 4. Nomenclature M K H2 – V 150 R3 Number of tube rows in the heat exchanger 3:3- row 4:4-row Nominal air volume (CFM) Power type V: DC Non:AC Type code H2: Cased type (air return from bottom)
  • Page 5 Midea AC Fan Coil Unit 5. Specifications MKH2-150-R3 MKH2-150-R4 MKH2-250-R3 MKH2-250-R4 Model MKH3-150-R3 MKH3-150-R4 MKH3-250-R3 MKH3-250-R4 Power supply V/Ph/Hz 220-240/1/50 255/165/142 255/192/139 400/273/180 425/284/184 Air flow (H/M/L) 150/97/84 150/113/82 235/161/106 250/167/109 External static pressure H2:0/H3:12 Total Capacity (H/M/L) 1.65/1.22/1.09 2.25/1.85/1.46 2.65/2.02/1.40...
  • Page 6 Midea AC Fan Coil Unit MKH2-350-R3 MKH2-350-R4 MKH2-500-R3 MKH2-500-R4 Model MKH3-350-R3 MKH3-350-R4 MKH3-500-R3 MKH3-500-R4 Power supply V/Ph/Hz 220-240/1/50 595/447/319 595/450/319 790/560/392 800/574/404 Air flow (H/M/L) 350/263/188 350/265/188 465/330/231 471/338/238 External static pressure H2:0/H3:12 Total Capacity (H/M/L) 3.85/3.19/2.46 4.20/3.38/2.48 4.65/3.80/2.92 5.35/4.25/3.31...
  • Page 7 Midea AC Fan Coil Unit MKH2-700-R3 MKH2-700-R4 MKH2-800-R3 MKH2-800-R4 Model MKH3-700-R3 MKH3-700-R4 MKH3-800-R3 MKH3-800-R4 Power supply V/Ph/Hz 220-240/1/50 1190/855/555 1150/885/591 1300/1088/782 1300/1132/836 Air flow (H/M/L) 700/503/327 677/521/348 766/641/461 766/667/492 External static pressure H2:0/H3:12 Total Capacity (H/M/L) 6.00/5.03/3.71 6.75/5.80/4.24 7.35/6.51/5.15 8.25/7.52/5.87...
  • Page 8 Midea AC Fan Coil Unit Capacity Table Cooling Capacity Table MKH2(3)-150-R3 Indoor temperature (D.B.) Indoor EWT ΔT tempe WPD TC WPD TC WPD TC WPD TC (W.B.) ° C ° C ° C kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa...
  • Page 9 Midea AC Fan Coil Unit (Continued) MKH2(3)-150-R3 Indoor temperature (D.B.) Indoor EWT ΔT tempe WPD TC WPD TC WPD TC WPD TC (W.B.) ° C ° C ° C kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa 0.57 0.57 0.17...
  • Page 10 Midea AC Fan Coil Unit MKH2(3)-250-R3 Indoor temperature (D.B.) Indoor ΔT tempe TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC (W.B.) [° C] [° C [° C] [m^3/h [kPa] [kW [m^3/h [kPa] [kW [m^3/h...
  • Page 11 Midea AC Fan Coil Unit (Continued) MKH2(3)-250-R3 Indoor temperature (D.B.) Indoor ΔT temp WPD TC WPD TC WPD TC WPD TC (W.B.) ° C ° C ° C kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa 1.03 1.03...
  • Page 12 Midea AC Fan Coil Unit MKH2(3)-350-R3 Indoor Indoor temperature (D.B.) ΔT temp TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 13 Midea AC Fan Coil Unit (Continued) MKH2(3)-350-R3 Indoor temperature (D.B.) Indoor ΔT temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 1.47 1.47 0.42 15.76 1.82 1.82 0.53 22.94 2.16 2.16 0.63 30.91 2.5 2.5 0.72 39.73 2.83 2.83 0.81 48.69...
  • Page 14 Midea AC Fan Coil Unit MKH2(3)-350-R4 Indoor Indoor temperature (D.B.) ΔT temp TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 15 Midea AC Fan Coil Unit (Continued) MKH2(3)-350-R4 Indoor Indoor temperature (D.B.) ΔT temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 1.62 1.62 0.47 11.49 2...
  • Page 16 Midea AC Fan Coil Unit MKH2(3)-500-R3 Indoor temperature (D.B.) Indoor EWT ΔT temp(W.B.) TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 17 Midea AC Fan Coil Unit (Continued) MKH2(3)-500-R3 Indoor temperature (D.B.) Indoor EWT ΔT temp(W.B.) TC SC WF WPD TC SC WPD TC SC WPD TC SC WPD TC SC ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 18 Midea AC Fan Coil Unit MKH2(3)-500-R4 Indoor temperature (D.B.) Indoor ΔT temp TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 19 Midea AC Fan Coil Unit (Continued) MKH2(3)-500-R4 Indoor temperature (D.B.) Indoor ΔT Temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 2.09 2.09 0.6 17.62 2.57 2.57 0.74 25.15 3.05 3.05 0.88 34.18 3.52 3.52 1.01 43.2 3.98 3.98 1.15 53.51...
  • Page 20 Midea AC Fan Coil Unit MKH2(3)-700-R3 Indoor temperature (D.B.) Indoor ΔT temp TC SC WPD TC SC WPD TC SC WPD TC SC WPD TC SC (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 21 Midea AC Fan Coil Unit (Continued) MKH2(3)-700-R3 Indoor temperature (D.B.) Indoor ΔT temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 2.31 2.31 0.66 17.79 2.9 2.9 0.83 26.26 3.49 3.49...
  • Page 22 Midea AC Fan Coil Unit MKH2(3)-700-R4 Indoor temperature (D.B.) Indoor Δ temp WF WPD WPD TC WF WPD TC (W.B.) ° C ° C ° C kW m 3/h kPa kW m^3/h kPa kW m^3/h kPa kW m 3/h kPa kW m^3/h kPa 6.09 4.5...
  • Page 23 Midea AC Fan Coil Unit (Continued) MKH2(3)-700-R4 Indoor temperature (D.B.) Indoor ΔT temp (W.B.) TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 2.63 2.63 0.75 9.84 3.3 3.3 0.95 14.55 3.95 3.95 1.13 19.7 4.58 4.58 1.31 25.43 5.21 5.21 1.51 32.17...
  • Page 24 Midea AC Fan Coil Unit MKH2(3)-800-R3 Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) ° C ° C ° C kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa kW m^3/h kPa 6.42 4.84 1.85 54.08 6.38 5.51 1.84 53.58 6.49 6.2 1.87 55.09 6.89 6.89 1.99 61.22 7.55 7.55 2.18 72.05 8.45 4.88 2.45 88.14...
  • Page 25 Midea AC Fan Coil Unit (Continued) MKH2(3)-800-R3 Indoor temperature (D.B.) Indoor ΔT temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 2.77 2.77 0.8 12.15 3.48 3.48...
  • Page 26 Midea AC Fan Coil Unit MKH2(3)-800-R4 Indoor Indoor temperature (D.B.) ΔT temp TC SC WF TC SC WF TC SC WF TC SC WF TC SC WF (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa...
  • Page 27 Midea AC Fan Coil Unit (Continued) MKH2(3)-800-R4 Indoor temperature (D.B.) Indoor ΔT temp TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD TC SC WF WPD (W.B.) ° C ° C ° C kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa kW kW m^3/h kPa 2.96 2.96 0.85 18.17 3.69 3.69 1.06 26.38 4.4 4.4 1.27 35.8 5.11 5.11 1.47 46.24 5.8 5.8 1.67 57.7...
  • Page 28 Midea AC Fan Coil Unit Heating Capacity Table MKH2(3)-150-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 1.31 0.19 5.73 1.09 0.16 4.14 0.84 0.12 2.64 0.65 0.09 1.71...
  • Page 29 Midea AC Fan Coil Unit MKH2(3)-150-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 1.67 0.24 11.7 1.48 0.21 1.31 0.19 7.54 1.13 0.16 5.81 1.68 0.18 1.48 0.16...
  • Page 30 Midea AC Fan Coil Unit MKH2(3)-250-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 2.08 5.93 1.83 0.26 4.66 1.55 0.22 3.53 1.27 0.18 2.51 1.94 0.21 3.17 1.65...
  • Page 31 Midea AC Fan Coil Unit MKH2(3)-250-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 2.29 0.33 2.01 0.29 7.28 1.71 0.25 5.54 3.99 2.15 0.23 5.01 1.84 3.85 1.52...
  • Page 32 Midea AC Fan Coil Unit MKH2(3)-350-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 3.01 0.43 14.43 2.62 0.38 11.35 2.23 0.32 8.59 1.82 0.26 6.14 2.79 7.73 2.38...
  • Page 33 Midea AC Fan Coil Unit MKH2(3)-350-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 3.25 0.57 13.89 2.87 11.06 2.46 0.43 8.53 2.06 0.36 6.28 2.97 0.32 5.32 2.54...
  • Page 34 Midea AC Fan Coil Unit MKH2(3)-500-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 3.25 0.56 22.45 2.82 0.49 17.62 0.41 13.32 1.97 0.34 9.53 2.78 7.77 2.34 0.25...
  • Page 35 Midea AC Fan Coil Unit MKH2(3)-500-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 4.21 0.73 21.39 3.66 0.64 16.99 3.16 0.55 13.05 2.63 0.46 9.56 0.41 8.01 3.24...
  • Page 36 Midea AC Fan Coil Unit MKH2(3)-700-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 4.38 0.76 19.52 0.66 15.25 3.22 0.56 11.44 2.63 0.45 3.69 6.52 3.07 0.33 4.81...
  • Page 37 Midea AC Fan Coil Unit MKH2(3)-700-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 5.13 0.88 11.25 4.42 0.77 8.83 3.77 0.65 6.66 3.09 0.53 4.75 4.36 0.47 3.89...
  • Page 38 Midea AC Fan Coil Unit MKH2(3)-800-R3 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 6.05 1.05 17.01 5.29 0.92 13.42 4.52 0.78 10.2 3.73 0.65 7.36 0.57 6.07 4.48...
  • Page 39 Midea AC Fan Coil Unit MKH2(3)-800-R4 Indoor temperature (D.B.) ΔT [° C] [° C] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] [kW] [m^3/h] [kPa] 6.14 1.07 23.3 5.39 0.93 18.4 0.79 14.03 3.81 0.66 10.17 5.44 0.59 8.43 6.36...
  • Page 40 Midea AC Fan Coil Unit 6. Dimensions Dimensions (unit: mm) Model(MKH2/3- 1020 1240 1240 1360 1360 1104 1104 1078 1078 1198 1198...
  • Page 41 Midea AC Fan Coil Unit 7. Sound Levels Sound Power Level： Model MKH2- 150-R3 250-R3 350-R3 500-R3 700-R3 800-R3 H2 (H/M/L) 47/35/34 46/37/31 52/44/36 59/51/43 63/56/45 62/58/50 H3 (H/M/L) 47/35/34 46/37/31 52/44/36 59/51/43 63/56/45 62/58/50 Model MKH2- 150-R4 250-R4 350-R4...
  • Page 42 Midea AC Fan Coil Unit Sound Pressure Level: Model MKH2- 150-R3 250-R3 350-R3 500-R3 700-R3 800-R3 H2 (H/M/L) 35/24/21 34/24/18 39/32/23 48/39/31 50/43/33 50/46/36 H3 (H/M/L) 35/24/21 34/24/18 39/32/23 48/39/31 50/43/33 50/46/36 Model MKH2- 150-R4 250-R4 350-R4 500-R4 700-R4 800-R4...
  • Page 43 Midea AC Fan Coil Unit 8. Service Spaces Cased type Footing ≥150 a (mm) ≥90 b (mm) ≥50 c (mm) Uncased type ≥150 a (mm) ≥90 b (mm) ≥50 c (mm)
  • Page 44 Midea AC Fan Coil Unit 9. Wiring Diagrams Model：MKH2-150/(250)/(350)/(500)/(700)/(800)R3/(R4) MKH3-150/(250)/(350)/(500)/(700)/(800)R3/(R4)
  • Page 45 Midea AC Fan Coil Unit 10. Installation 10.1 Transport and handling Caution: Do not open or tamper with the packaging before installation. The units should only be moved and lifted by specialized personnel trained in these operations. Check on arrival that the unit has not been damaged during transport and that it is complete with all its parts.
  • Page 46 Midea AC Fan Coil Unit ≥150 a (mm) ≥90 b (mm) ≥50 c (mm) Uncased type ≥150 a (mm) ≥90 b (mm) ≥50 c (mm) 10.4 Units installation Caution: Installation must only be carried out by qualified technicians, trained to work with air-conditioning and refrigeration systems.
  • Page 47 Midea AC Fan Coil Unit Casing assembly Figure 10.4.1 Mark the places for screws on the wall according to the unit mounting holes or dimensions specified in Figure 10.4.2. The drain pipe for condensate water must be smooth enough to allow unobstructed water discharge.
  • Page 48 Midea AC Fan Coil Unit Base Base Footing Figure 10.4.3 The footings shown in Figure 10.4.3 are optional. You can purchase them separately and install them as follows: 1. Put the footings beside the unit to be installed. 2. Place the mounting holes on the unit base into the corresponding footing locating pin and install screws ①...
  • Page 49 Midea AC Fan Coil Unit Figure 10.4.4 Diagram of ceiling exposed Figure 10.4.5 Diagram of ceiling concealed Liquid pipe connections Connect the unit to the water system using inlet and outlet connectors. Drainage Water outlet Water inlet Figure 10.4.6 All water system coils are equipped with discharge and drain valves.
  • Page 50 Midea AC Fan Coil Unit Wrap the connecting pipes and all the valve body with anti-condensation material (EPDM or PE) of no less ② than 10 mm thick, or install auxiliary drainage equipment. Pour water into the drain pan and check it all the way until you can see water flows from the drain outlet.
  • Page 51 Midea AC Fan Coil Unit auxiliary drain pan Figure 10.4.9 The customer may also need to purchase the auxiliary drain pan（Figure 10.4.9） separately from the manufacturer if required. See the steps below for installation of auxiliary drain pan: Electrical connections Caution: ...
  • Page 52 Midea AC Fan Coil Unit Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection， where MFA is used to select the current circuit breakers and residual current operation breakers Table 10.4.1...
  • Page 53 Midea AC Fan Coil Unit  The unit falls correctly towards the drainage outlet and the trap;  The heat-exchangers are clean;  The electrical connections are correct;  The screws holding the cables are well tightened;  The supply voltage is as required;...
  • Page 54 Midea AC Fan Coil Unit c) As shown in Figure 10.5.2, remove screws ①*2 to take the filter out. Then, remove the upper volute. After that, remove four screws (②) that fix the motor, to disconnect the motor cable and the main board. Then, take out the fan and the motor.
  • Page 55 Midea AC Fan Coil Unit the heat exchanger out. h) Pull out the temperature sensor plug. Install back the heat exchanger in reverse order Figure 10.5.3 Removal of casing Electric control Figure 10.5.4 Removing the electric control box Heat exchanger...
  • Page 56 Midea AC Fan Coil Unit If the unit or its parts need(s) to be removed, make sure that: Only a professional person can disassemble the unit. The system with antifreeze must not be discarded; otherwise, it will cause pollution. It should be collected and then be disposed off properly.
  • Page 57 Midea AC Fan Coil Unit Non-Unit Related Faults: The following fault symptoms are not caused by the unit itself: 1) Fault symptom: Fan speed is not consistent with the setting. The fan doesn’t respond to the controller. In cooling mode, when the pipe water temperature is outside the allowable range of room temperature, the fan speed will be maintained at a low level to avoid direct exposure to hot air.

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H3 seriesМкн2-150r3Mkh3-150r3Мкн2-150r4Mkh3-150r4Mkh2-250r3 ... Show all

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