Mitsubishi MXZ-8A140VA Installation Manual
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Mitsubishi MXZ-8A140VA Installation Manual

Mitsubishi MXZ-8A140VA Installation Manual

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Summary of Contents for Mitsubishi MXZ-8A140VA

  • Page 2: Table Of Contents

    • Use only accessories authorized by Mitsubishi Electric and ask a dealer or • Ventilate the room if refrigerant leaks during operation. If refrigerant comes an authorized technician to install them.

  • Page 3: Installation Diagram & Parts

    1. Safety precautions 1.3. Before electric work Caution: • Be sure to install circuit breakers. If not installed, electric shock may result. • When installing the power lines, do not apply tension to the cables. If the connections are loosened, the cables can snap or break and overheating or IMPORTANT fire may result.

  • Page 4: Installation Location

    3. Installation location 3.1. Refrigerant pipe Refer to 5.2. Pipe length and height difference. 3.2. Choosing the outdoor unit installation location • Avoid locations exposed to direct sunlight or other sources of heat. • Select a location from which noise emitted by the unit will not inconvenience neighbors.
  • Page 5 3. Installation location Fig. 3-5 Fig. 3-6 Fig. 3-7 Fig. 3-8 1500 Fig. 3-9 Fig. 3-10 Fig. 3-11 Fig. 3-12 Fig. 3-13 Fig. 3-14 Fig. 3-15 Fig. 3-16 Fig. 3-17 3.4.2. When installing a single outdoor unit 3.4.3. When installing multiple outdoor units Minimum dimensions are as follows, except for Max., meaning Maximum dimensions, Leave 10 mm space or more between the units.

  • Page 6: Installing The Outdoor Unit

    4. Installing the outdoor unit • Be sure to install the unit in a sturdy, level surface to prevent rattling noises during operation. (Fig. 4-1) (mm) <Foundation specifications> Foundation bolt M10 (3/8") Thickness of concrete 120 mm Length of bolt 70 mm Weight-bearing capacity 320 kg...
  • Page 7 5. Installing the refrigerant piping 5.3. Addition of refrigerant If connecting an indoor unit with ø9.52 liquid pipes (model number 71 or more for M- and S-Series and model number 60 or more for P-Series), the additional refrigerant • Additional charging is not necessary for this unit if the total pipe length charging amount in Table 1 must be corrected (add the following ∆R value from the (b1+b2+a1+a2+a3+a4+a5+a6+a7+a8) does not exceed 40 m.
  • Page 8 5. Installing the refrigerant piping Refrigerant collection when relocating the indoor and outdoor units (pump down) 1 Connect a gauge manifold valve (pressure gauge included) to the service port near the gas stop valve of the outdoor unit so that the refrigerant pres- sure can be measured.

  • Page 9: Airtight Test And Evacuation

    5. Installing the refrigerant piping 5.6. Refrigerant piping (Fig. 5-6) Remove the service panel D (three screws) and the front piping cover A (two screws) and rear piping cover B (two screws). Refrigerant pipes are protectively wrapped • The pipes can be protectively wrapped up to a diameter of ø90 before or after connecting the pipes.

  • Page 10: Drainage Piping Work

    5. Installing the refrigerant piping 2 Evacuation (Fig. 5-10) Evacuation should be made from the service port provided on the outdoor unit’s stop valve to the vacuum pump commonly used for both liquid or high-pressure pipe and gas or low-pressure pipe. (Make evacuation from both liquid or high-pressure pipe and gas or low-pressure pipe with the stop valve closed.) Remember: Never carry out air purge by refrigerant.
  • Page 11 7. Electrical work 2-4. 2 branch boxes (5-branch type, maximum 8 indoor units) (5-branch type) (5-branch type) 1. Up to 2 branch boxes can be connected to a single outdoor unit. 2. Up to 8 indoor units can be connected to the system. [3] Incorrect systems 3-1.
  • Page 12 7. Electrical work 7.2. Branch box/outdoor wire connection and outdoor power supply cord connection Warning: • Be sure to attach the terminal block covers/panel of the outdoor unit securely. If it is not attached correctly, it could result in a fire or an electric shock due to dust, water, etc.
  • Page 13 7. Electrical work Warning: In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is energized.

  • Page 14: Test Run

    8. Test run 8.1. Before test run s After completing installation and the wiring and piping of the indoor and 3. After connecting the wires to the compressor, the compressor will start to warm outdoor units, check for refrigerant leakage, looseness in the power supply up after power is supplied.

  • Page 15: Special Functions

    9. Special Functions 9.1. Low noise mode (on-site modification) (Fig. 9-1) By performing the following modification, operation noise of the outdoor unit can be reduced by about 3-4 dB. The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to the CNDM connector (option) on the control board of the outdoor unit.
  • Page 16 This product is designed and intended for use in the residential, commercial and light-industrial environment. • Low Voltage Directive 73/23/ EEC The product at hand is • Electromagnetic Compatibility Directive 89/ based on the following 336/ EEC EU regulations: Please be sure to put the contact address/telephone number on this manual before handing it to the customer.

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