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Mitsubishi Electric MXZ-3C54VA Installation Manual

Split-type air-conditioner
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Split-type Air-Conditioner
Installation Manual
• This manual only describes the installation of outdoor unit.
When installing the indoor unit, refer to the installation manual of indoor unit.



  Summary of Contents for Mitsubishi Electric MXZ-3C54VA

  • Page 1 Split-type Air-Conditioner MXZ-3C54VA MXZ-4C71VA For INSTALLER Installation Manual English • This manual only describes the installation of outdoor unit. When installing the indoor unit, refer to the installation manual of indoor unit.
  • Page 2: Before Installation

    Indoor/outdoor Max. height Refrigerant adjust- Power supply per indoor unit / per indoor unit / Voltage quency capacity connecting wire difference *9 ment A *0 for multi-system for multi system MXZ-3C54VA 25 m / 50 m 25 / 50 4-core 230 V 50 Hz 25 A 3-core 2.5 mm 5 m 20 g/m .0/.5 mm MXZ-4C7VA 25 m / 60 m 25 / 60 * Connect to the power switch which has a gap of 3 mm or more when *6 Refrigerant pipe bending radius must be 00 mm or more.
  • Page 3: Selecting The Installation Location

    1-3. SELECTING OPTIONAL DIFFERENT-DIAMETER JOINTS If the diameter of connection pipe does not match the port size of outdoor unit, use optional different-diameter joints according to the following table. (Unit: mm (inch)) Optional different-diameter joints (port size of outdoor unit → diameter of connection pipe) Port size of outdoor unit 6.35 (/4) → 9.52 (3/8) : PAC-493PI MXZ- MXZ- Liquid / Gas 9.52 (3/8) → 2.7 (/2) : MAC-454JP 3C54VA 4C7VA 9.52 (3/8) → 5.88 (5/8) : PAC-SG76RJ A UNIT 6.35 (/4) / 2.7 (/2) 2.7 (/2) → 9.52 (3/8) : MAC-A455JP 2.7 (/2) → 5.88 (5/8) : MAC-A456JP A - C UNIT B - D UNIT 6.35 (/4) / 9.52 (3/8) Refer to the installation manual of indoor unit for the diameter of connection pipe of indoor unit. 1-4. SELECTING THE INSTALLATION LOCATION • Where it is not exposed to strong wind.
  • Page 4: Installation Diagram

    1-5. INSTALLATION DIAGRAM ACCESSORIES After the leak test, apply insulat- Check the following parts before installation. ing material tightly so that there is no gap. () Drain socket (2) Drain cap PARTS TO BE PROVIDED AT YOUR SITE When the piping is to be at- tached to a wall containing metals (A) Power supply cord* (tin plated) or metal netting, use (B) Indoor/outdoor unit connecting wire* a chemically treated wooden Open as a rule piece 20 mm or thicker between More than 500 mm (C) Extension pipe if the front and both the wall and the piping or wrap 7 (D) Wall hole cover sides are open to 8 turns of insulation vinyl tape around the piping. (E) Piping tape To use existing piping, perform Extension drain hose COOL operation for 30 minutes...
  • Page 5: Outdoor Unit Installation

    2. OUTDOOR UNIT INSTALLATION 2-1. CONNECTING WIRES FOR OUTDOOR UNIT ) Remove the service panel. Terminal block for power supply 2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (B) from the indoor unit correctly on the terminal block. Be careful not to make mis-wiring. Fix the wire to the terminal block securely so that no part of its core is appeared, and no external force is conveyed to the connecting section of the terminal block. 3) Firmly tighten the terminal screws to prevent them from loosening. After tighten- ing, pull the wires lightly to confirm that they do not move. 4) Perform 2) and 3) for each indoor unit. 5) Connect power supply cord (A). 6) Fix indoor/outdoor unit connecting wire (B) and power supply cord (A) with the cable clamps. 4C7VA 7) Close the service panel securely. Make sure that 3-2. PIPE CONNECTION is completed. Service panel • After making connections between both power supply cord (A) and indoor/out- door unit connecting wire (B), be sure to fix both cable and wire with cable clamps. <OUTDOOR UNIT> Indoor/outdoor unit 5 mm connecting wire Terminal block for 35 mm Terminal block Terminal block power supply Lead wire • Be sure to attach each screw to its correspondent terminal when securing the cord and/or the wire to the terminal block.
  • Page 6 4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN 4-1. PURGING PROCEDURES AND LEAK TEST Compound pressure ) Remove service port cap of stop valve on the side of the outdoor unit –0.0MPa gauge (for R40A) Stop valve cap *4 to 5 turns gas pipe. (The stop valves are fully closed and covered in caps in (–760 mmHg) (Torque 9.6 to their initial state.) Pressure gauge 29.4 N•m, 200 *Close (for R40A) 2) Connect gauge manifold valve and vacuum pump to service port of to 300 kgf•cm) *Open stop valve on the gas pipe side of the outdoor unit. Gauge manifold valve (for R40A) 3) Run the vacuum pump. (Vacuumize for more than 5 minutes.) 4) Check the vacuum with gauge manifold valve, then close gauge Handle High Handle manifold valve, and stop the vacuum pump. Hexagonal wrench Charge hose 5) Leave as it is for one or two minutes. Make sure the pointer of gauge (for R40A)
  • Page 7: Test Run

    4-4. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT) • Description of the function: With this function, once the operation mode is locked to either COOL/DRY mode or HEAT mode, the air conditioner operates in that mode only. * Changing the setting is required to activate this function. Please explain about this function to your customers and ask them whether they want to use it. [How to lock the operation mode] ) Be sure to turn off the main power for the air conditioner before making the setting.

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