Midea MKG Series Technical & Service Manual
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Midea MKG Series Technical & Service Manual

50hz ac fan coil unit 2-pipe wall-mounted
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Midea 50Hz AC Fan Coil Unit
2-Pipe Wall-mounted 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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שמעון
February 24, 2025

צריך לעשות משהו בכדי לקבל חימום דרך גוף חימום

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2 comments:
Mr. Anderson
February 24, 2025

To enable heating through the heating element in the Midea MKG Series, press the Heater Button on the controller. This activates the heating function if the unit supports heating mode. If the model is cooling-only, the heating mode is skipped.

This answer is automatically generated

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שמעון
February 25, 2025

@Mr. Anderson

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Summary of Contents for Midea MKG Series

  • Page 1 Midea 50Hz AC Fan Coil Unit 2-Pipe Wall-mounted 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: Table Of Contents

    AC Fan Coil Unit Two-pipe Wall-mounted Series Wall-mounted AC Fan Coil Unit 1. INTRODUCTION ..................- 2 - 2. NOMENCLATURE ..................- 2 - 3. PRODUCT DETAILS ................... - 2 - 4. EXTERNAL APPEARANCE ................ - 3 - 5. FEATURE ....................- 4 - 6.

  • Page 3: Introduction

    Midea MKG series fan coil unit has been tested by national AC quality supervise testing center, as low noise level, high efficiency, stable operation and low power consumption make it as the advanced production in the world, Due to their reduced dimensions and pleasing design, these units are ideally suited for Commercial and Residential environments.

  • Page 4: External Appearance

    AC Fan Coil Unit Two-pipe Wall-mounted Series 4. External Appearance МИРКОНД буде поставляти в 2022-23 з таким дизайном A panel - 3 -...

  • Page 5: Feature

    AC Fan Coil Unit Two-pipe Wall-mounted Series 5. Feature Multi-connection outlet pipe method: left/right/rear, more flexible for installation. Lef t piping Left ba ck piping R ight piping R igh t back pi ping Wind direction adjustment can be in horizontal and vertical way for auto swing louver Vertical air deflector Horizontal air deflector Built-in 3-way electromagnetic valve.

  • Page 6: Specifications

    AC Fan Coil Unit Two-pipe Wall-mounted Series 6. Specifications 6.1 S type panel MKG-250-B / MKG-300-B / MKG-400-B Model MKG-250-B MKG-300-B MKG-400-B Power supply V/Ph/Hz 220-240/1/50 m3/h 425/390/350 510/470/390 680/550/460 Air flow (H/M/L) 250/230/205 300/275/230 400/325/270 Capacity (H/M/L) 2.63/2.41/2.16 2.97/2.47/2.12 3.28/2.83/2.41 Cooling Water flow rate...
  • Page 7 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-500-B / MKG-600-B Model MKG-500-B MKG-600-B Power supply V/Ph/Hz 220-240/1/50 m3/h 850/745/620 1020/915/780 Air flow (H/M/L) 500/440/365 600/540/460 Capac ity (H/M/L) 4.25/3.85/3.32 5/4.47/3.97 Cooling Water flow rate Water pressure drop 31.8 42.5 Capac ity (H/M/L) 5.81/5.17/4.43 6.7/6/5.28 Heating...
  • Page 8 AC Fan Coil Unit Two-pipe Wall-mounted Series 6.2 A type panel MKG-250-C / MKG-300-C / MKG-400-C Model MKG-250-C MKG-300-C MKG-400-C Power supply V/Ph/Hz 220-240/1/50 435/396/342 523/426/351 660/534/480 Air flow (H/M/L) 256/233/201 308/251/206 388/314/282 Capacity (H/M/L) 1.94/1.84/1.68 2.64/2.4/1.99 2.94/2.58/2.34 Cooling Water flow rate(H/M/L) 0.35/0.33/0.3 0.47/0.43/0.36 0.53/0.46/0.42...
  • Page 9 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-500-C / MKG-600-C Model MKG-500-C MKG-600-C Power supply V/Ph/Hz 220-240/1/50 m3/h 841/723/594 915/836/714 Air flow (H/M/L) 495/425/349 538/492/420 Capacity (H/M/L) 4.01/3.61/3.1 4.61/4.33/3.84 Cooling Water flow rate(H/M/L) m3/h 0.72/0.65/0.56 0.83/0.78/0.69 Water press ure drop(H/M/L) 47.1/33.5/29.7 51/39.5/34 Capacity (H/M/L)
  • Page 10 AC Fan Coil Unit Two-pipe Wall-mounted Series 6.3 P type panel MKG-250-D / MKG-300-D / MKG-400-D Model MKG-250-D MKG-300-D MKG-400-D Power supply V/Ph/Hz 220-240/1/50 435/396/342 523/426/351 660/534/480 Air flow (H/M/L) 256/233/201 308/251/206 388/314/282 Capacity (H/M/L) 1.94/1.84/1.68 2.64/2.4/1.99 2.94/2.58/2.34 Cooling Water flow rate(H/M/L) 0.35/0.33/0.3 0.47/0.43/0.36 0.53/0.46/0.42...
  • Page 11 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-500-D / MKG-600-D Model MKG-500-D MKG-600-D Power supply V/Ph/Hz 220-240/1/50 m3/h 841/723/594 915/836/714 Air flow (H/M/L) 495/425/349 538/492/420 Capacity (H/M/L) 4.01/3.61/3.1 4.61/4.33/3.84 Cooling Water flow rate(H/M/L) m3/h 0.72/0.65/0.56 0.83/0.78/0.69 Water press ure drop(H/M/L) 47.1/33.5/29.7 51/39.5/34 Capacity (H/M/L)

  • Page 12: Dimensions

    AC Fan Coil Unit Two-pipe Wall-mounted Series 7. Dimensions 7.1 S type panel MKG-250-B, MKG-300-B, MKG-400-B, MKG-500-B, MKG-600-B Model MKG-250(300,400)-B MKG-500(600)-B 1072 - 11 -...
  • Page 13 AC Fan Coil Unit Two-pipe Wall-mounted Series 7.2 A type panel MKG-250-C, MKG-300-C, MKG-400-C, MKG-500-C, MKG-600-C Model MKG-250(300,400)-C MKG-500(600)-C 1072 - 12 -...
  • Page 14 AC Fan Coil Unit Two-pipe Wall-mounted Series 7.3 P type panel MKG-250-D, MKG-300-D, MKG-400-D, MKG-500-D, MKG-600-D Model MKG-250(300,400)-D MKG-500(600)-D 1072 - 13 -...

  • Page 15: Service Spaces

    AC Fan Coil Unit Two-pipe Wall-mounted Series 8. Service Spaces 9. Main PCB ports - 14 -...
  • Page 16 AC Fan Coil Unit Two-pipe Wall-mounted Series Main PCB port description: Bit No. Description Remarks CN10 POWER: Mains input Standard CN29 CAN: Cooling and heating 2-way/3-way valve null line Standard CN14 ACN: Cooling and heating 2-way/3-way valve null line Reserved PUMP: Water pump output port Reserved (the CN11...

  • Page 17: Wiring Diagrams

    AC Fan Coil Unit Two-pipe Wall-mounted Series 10. Wiring Diagrams NOTE: 1.ALARM: Error codes or protections occurred , a closed signal output. 2.ON/OFF ： Short circuit, forced off; otherwise, all the controllers available. Power supply Control board POWER IN is grounded is grounded AC FAN ONLY AC...

  • Page 18: Sound Levels

    AC Fan Coil Unit Two-pipe Wall-mounted Series 11. Sound Levels Noise level under three speeds of fan [dB(A)] Series Model MKG-250-B MKG-300-B S panel MKG-400-B MKG-500-B MKG-600-B MKG-250-C MKG-300-C A panel MKG-400-C MKG-500-C MKG-600-D MKG-250-D MKG-300-D P panel MKG-400-D MKG-500-D MKG-600-D - 17 -...
  • Page 19 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-250-B / MKG-250-C / MKG-250-D MKG-300-B / MKG-300-C / MKG-300-D - 18 -...
  • Page 20 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-400-B / MKG-400-C / MKG-400-D MKG-500-B / MKG-500-C / MKG-500-D - 19 -...
  • Page 21 AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-600-B / MKG-600-C / MKG-600-D - 20 -...

  • Page 22: Installation

    AC Fan Coil Unit Two-pipe Wall-mounted Series 12. Installation 12.1 Installation Attention 1. Warning: • 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 23 AC Fan Coil Unit Two-pipe Wall-mounted Series • Connect the outdoor unit wires, then connect the indoor unit wires. You are not allowed to connect the air conditioner with the power source until wiring and piping the air conditioner is done. •...
  • Page 24 AC Fan Coil Unit Two-pipe Wall-mounted Series 12.2 Accessory Name Shape Quantity Function Installation board Screw ST3.9x25 for installation board Secure the installation board Plastic expanded tube Wrapping tape Drain pipe Sealing clay Wall conduit cover Remote controller (including operation manual) Frame Hold the remote controller Mounting screw(ST2.9×10-C-H)
  • Page 25 AC Fan Coil Unit Two-pipe Wall-mounted Series • Machine and medical facility. • A place there is no combustive gases and volatile matter. • A place of special environmental conditions. Installation in the following places: • A place where is no obstacle near the inlet and outlet area. •...
  • Page 26 AC Fan Coil Unit Two-pipe Wall-mounted Series • Always use a wall hole conduit when piercing metal lath, ply wood or metal plate. 12.4.3 Connective Pipe and Drainage Installation 1. Drainage Run the drain hose sloping downward. Do not install the drain hose as illustrated below. When connection extension drain hose, insulate the connecting part of extension drain hose with a shield pipe.
  • Page 27 AC Fan Coil Unit Two-pipe Wall-mounted Series b) Connect pipe. c) Install the pipe holder. (Refer to the following fig) 2) For the left-hand and rear-left-hand piping, install the piping as shown. Bend the connective pipe to be laid at 43mm height or less from the wall. 3) Fix the end of the connective pipe.
  • Page 28 AC Fan Coil Unit Two-pipe Wall-mounted Series put anything else in the box. 12.4.4 Indoor Unit Installation • Pass the piping through the hole in the wall. • Put the claw at the back of the indoor unit on the hook of the installation board, move the Indoor Unit from side to side to see that it is securely hooked.
  • Page 29 AC Fan Coil Unit Two-pipe Wall-mounted Series At the first debugging, completely expel air from coils via expelling valve. 12.6 Wiring Cautions: • The reserved function is indicated in broken line table, users can select it when necessary. • An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device (RCD) with the rating of above 10mA shall be incorporated in the fixed wiring according to the national rule.
  • Page 30 AC Fan Coil Unit Two-pipe Wall-mounted Series в настінних моделях інший фотоприймач. але дріт підєднання і роз'єм настінного пульта той самий Insert 2 & 3 together is OK The reserved wire control function is indicated in broken line table, users can purchase the wire controller when necessary.
  • Page 31 AC Fan Coil Unit Two-pipe Wall-mounted Series 12.7.1 E2: Room temperature T1 sensor check channel is abnormal. E2: Room temperature T1 sensor check channel is abnormal. T1 connecting wire between sensor and Reconnect and ensure that the main board gets loose connection is reliable.
  • Page 32 AC Fan Coil Unit Two-pipe Wall-mounted Series 12.7.4 E8: Fan motor malfunction E8: Fan motor malfunction Is the motor fan stuck Adjust the IDU fan Is the cable between the main board Properly connect the cable and the fan not connected or loose Power failure: contact the Is the IDU input power abnormal power supply sector...
  • Page 33 AC Fan Coil Unit Two-pipe Wall-mounted Series 12.8 Troubles and causes of air conditioner If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer. • The operation lamp is flashing rapidly (twice every second) •...

  • Page 34: Controller

    AC Fan Coil Unit Two-pipe Wall-mounted Series 13. Controller 13.1 Wireless remote controller R51/E 13.1.1 Remote Controller Specifications Model R51/E Rated Voltage 3.0V Lowest Voltage of CPU Emitting Signal 2.0V Reaching Distance 8m (when using 3.0 voltage, it can get 11m) Environment Temperature Range -5℃~60℃...
  • Page 35 AC Fan Coil Unit Two-pipe Wall-mounted Series 8 TIMER Button: This button is used to preset the time ON (start to operate) and the time OFF (turn off the operation) 9 ON/OFF Button: Push this button to start the unit operation. Push the button again to stop the unit operation. 10 FAN Speed Button: This button is used for setting fan speed in the sequence that goes from AUTO, LOW, MED to HIGH, and then back to Auto.
  • Page 36 AC Fan Coil Unit Two-pipe Wall-mounted Series Note: 1. When replacing batteries, do not use old batteries or a differe nt type battery. This may cause the remote controller to malfunction. 2. If you do not use the remote controller for several weeks remove the batteries. Otherwise battery leakage may damage the remote controller. 3.
  • Page 37 AC Fan Coil Unit Two-pipe Wall-mounted Series 4) Push the TIMER button and the remote controller will show the last set time for the STOP operation and the signal "h" will be shown on the display panel. You are now ready to reset the time of the STOP operation. 5) Push the TEMP button ( ) to set the time you want to stop the operation.
  • Page 38 AC Fan Coil Unit Two-pipe Wall-mounted Series 13.2.2 Function summarize New function Basic function Air filt er cleaning reminding function ON and OFF the air-conditioner Indoor unit address setting function Auto-restart function Remote control receiver function Time ON and Time OFF setting Lock the wired controller Cloc k setting Silent mode...
  • Page 39 AC Fan Coil Unit Two-pipe Wall-mounted Series 8 Silent/OK button Under the cooling, heating and auto mode, when operate the silent mode, it can reduce the running noise through setting the fan speed to low. This will help you bring a quieter environment. Under AUTO, DRY mode, the fan speed is auto and the Silent /OK button doesn’t work.
  • Page 40 AC Fan Coil Unit Two-pipe Wall-mounted Series in fire. The specified cables shall be applied in the wiring. No external force may be applied to the terminal. Otherwise, wire cut and heating may occur and result in fire. Don’t place the wired controller near the lamps, to avoid the remote signal of the controller to be disturbed. Do not install the unit and controller in a place with much oil, steam, sulfide gas.
  • Page 41 AC Fan Coil Unit Two-pipe Wall-mounted Series 7. Wiring figure 1) Connect two terminals of embedded 4-core shielding wire with the switching wires of wired remote controller and signal receiving board. Make sure the sequence of 4 terminals (A, B, C and D) should correspond to the wire sequence of signal switching wires (A, B, C and D).
  • Page 42 AC Fan Coil Unit Two-pipe Wall-mounted Series M4X20 screw for fixing the wall. Screw hole fixed on Screw hole installed the wall,use one on 86 Electrician box, GB950-86 M4X20 use two M4X25 GB823-88 4) Adjust the length of two plastic screw bars in the accessory to be the standard length from the electrical box screw bar to the wall.
  • Page 43 AC Fan Coil Unit Two-pipe Wall-mounted Series 10. Front cover installation 1) After adjusting the front cover and then buckle the front cover; avoid clamping the communication switching wire during installation. 2) Correct install the back cover and firmly buckle the front cover and back cover, if not you maybe make the front cover drop off.

  • Page 44: Capacity Tables

    AC Fan Coil Unit Two-pipe Wall-mounted Series Capacity Tables 14.1 S panel Cooling Capacity MKG-250-B Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C...
  • Page 45 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling Capacity MKG-300-B Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 46 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling Capacity MKG-400-B Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 47 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling Capacity MKG-500-B Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 48 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling Capacity MKG-600-B Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 49 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-250-B Indoor temperature (W.B.) ΔT °C °C 2.66 0.29 8.61 2.33 0.25 6.96 2.01 0.22 5.44 1.69 0.18 4.09 2.69 0.23 5.11 2.32 0.20 4.00 1.95 0.17 3.01 1.58 0.14 2.13 3.26 0.35 13.54...
  • Page 50 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-300-B Indoor temperature (W.B.) ΔT °C °C 3.09 0.33 11.32 2.71 0.29 9.12 2.34 0.25 7.12 1.96 0.21 5.33 3.15 0.27 6.74 2.71 0.23 5.26 2.27 0.20 3.94 1.84 0.16 2.77 3.78 0.41 17.79...
  • Page 51 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-400-B Indoor temperature (W.B.) ΔT °C °C 3.51 0.38 15.58 3.07 0.33 12.50 2.64 0.28 9.72 2.20 0.24 7.24 3.60 0.31 9.33 3.09 0.27 7.25 2.58 0.22 5.38 2.07 0.18 3.75 4.27 0.46 24.44...
  • Page 52 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-500-B Indoor temperature (W.B.) ΔT °C °C 4.57 0.49 11.80 4.03 0.43 9.56 3.48 0.37 7.53 2.94 0.32 5.69 4.60 0.40 6.95 3.98 0.34 5.48 3.36 0.29 4.14 2.74 0.24 2.96 5.65 0.61 18.57...
  • Page 53 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-600-B Indoor temperature (W.B.) ΔT °C °C 5.28 0.57 14.79 4.65 0.50 11.96 4.01 0.43 9.39 3.38 0.36 7.08 5.33 0.46 8.74 4.61 0.40 6.86 3.88 0.33 5.17 3.16 0.27 3.68 6.51 0.70 23.27...
  • Page 54 AC Fan Coil Unit Two-pipe Wall-mounted Series 14.2 A / P panel Cooling capacity MKG-250-C/ MKG-250-D Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C...
  • Page 55 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling capacity MKG-300-C/ MKG-300-D Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 56 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling capacity MKG-400-C/ MKG-400-D Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC WF WPD TC SC WF WPD TC WF WPD TC SC WF WPD °C °C °C kW m /h kPa kW kW m /h kPa...
  • Page 57 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling capacity MKG-500-C/ MKG-500-D Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) SC WF WPD TC SC WF SC WF WPD TC SC WF WPD TC SC WF WPD °C °C °C kW kW m /h kPa kW kW m kW kW m...
  • Page 58 AC Fan Coil Unit Two-pipe Wall-mounted Series Cooling capacity MKG-600-C/ MKG-600-D Indoor temperature (D.B.) Indoor EWT ΔT temp (W.B.) TC SC WF WPD TC SC WF SC WF WPD TC SC WF TC SC WF °C °C °C kW kW m /h kPa kW kW m kW kW m...
  • Page 59 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-250-C/ MKG-250-D Indoor temperature (W.B.) ΔT °C °C 1.87 0.20 3.05 1.64 0.18 2.25 1.41 0.15 1.50 1.18 0.13 0.94 1.66 0.14 1.25 1.43 0.12 0.87 1.20 0.10 0.66 0.97 0.08 0.53 1.44 0.10...
  • Page 60 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-300-C/ MKG-300-D Indoor temperature (W.B.) ΔT °C °C 2.35 0.25 4.51 2.05 0.22 3.59 1.76 0.19 2.66 1.47 0.16 1.69 2.06 0.18 2.26 1.78 0.15 1.51 1.49 0.13 0.96 1.21 0.10 0.67 1.80 0.13...
  • Page 61 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-400-C/ MKG-400-D Indoor temperature (W.B.) ΔT °C °C 2.84 0.31 6.23 2.49 0.27 4.97 2.13 0.23 3.83 1.78 0.19 2.74 2.50 0.22 3.46 2.15 0.19 2.49 1.80 0.16 1.57 1.47 0.13 0.92 2.18 0.16...
  • Page 62 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-500-C/ MKG-500-D Indoor temperature (W.B.) ΔT °C °C 3.63 0.39 13.17 3.18 0.34 10.53 2.74 0.30 8.13 2.29 0.25 6.00 3.22 0.28 7.37 2.77 0.24 5.71 2.32 0.20 4.11 1.88 0.16 2.43 2.79 0.20...
  • Page 63 AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity MKG-600-C/ MKG-600-D Indoor temperature (W.B.) ΔT °C °C 3.76 0.41 13.99 3.30 0.36 11.20 2.84 0.31 8.68 2.38 0.26 6.40 3.34 0.29 7.84 2.88 0.25 6.09 2.41 0.21 4.46 1.95 0.17 2.70 2.90 0.21...
  • Page 64 Ver. 2022-04V1 Midea Building Technologies Division Midea Group Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China Postal code: 528311 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...

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