Mitsubishi Electric MXZ-2A20NA Installation Manual
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Mitsubishi Electric MXZ-2A20NA Installation Manual

Mitsubishi Electric MXZ-2A20NA Installation Manual

Split-type air-conditioner
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Split-type Air-Conditioner
MXZ-2A20NA

INSTALLATION MANUAL

• Refer to the installation manual of each indoor unit for indoor unit in-
stallation.
This manual mentions how to install only the outdoor unit MXZ-2A20NA.
As for the way of installation for indoor unit, please refer to the installation manual
being attached each indoor unit.
The installation manual details the suggested installation method.
Any structural alterations necessary for installation must comply with local building
code requirements.
CONTENTS
1. BEFORE INSTALLATION ..............................................................................2
2. OUTDOOR UNIT INSTALLATION .................................................................5
3. FLARING WORK AND PIPE CONNECTION . ................................................7
FOR INSTALLER
JG79A039H01_En.indd 1
ATTENTION
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5/9/2008 2:23:40 PM

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Summary of Contents for Mitsubishi Electric MXZ-2A20NA

  • Page 1: Installation Manual

    Français Español ATTENTION This manual mentions how to install only the outdoor unit MXZ-2A20NA. As for the way of installation for indoor unit, please refer to the installation manual being attached each indoor unit. The installation manual details the suggested installation method.

  • Page 2: Before Installation

    Model Rated Max. pipe length per indoor Max. Max. no. of bends per in- Refrigerant adjustment A Frequency Voltage unit / for multi-system height difference door unit / for multi system 208/ MXZ-2A20NA 60 Hz 25 m (82 ft) / 50 m (164 ft) 15 m (49 ft) 25 / 70 20 g/m (1.06 oz each 5 ft) 230 V *1 Never use pipes with thickness less than specified. The pressure resist- *6 Insulation material : Heat resisting foam plastic 0.045 specific gravity ance will be insufficient. *7 Be sure to use the insulation of specified thickness. Excessive thickness *2 Use a copper pipe or a copper-alloy seamless pipe. may cause incorrect installation of the indoor unit and insufficient thick- *3 Be careful not to crush or bend the pipe during pipe bending.

  • Page 3: Selecting The Installation Location

    1-4. SELECTING PIPE SIZE AND OPTIONAL DIFFERENT-DIAMETER JOINTS The diameter of connection pipes differs according to the type and capacity of indoor units. Match the diameters of connection pipes for indoor and outdoor units according to the following table. • If the diameter of connection pipes does not match the diameter of pipe end connections, use optional different-diameter joints. [mm (inch)] Indoor unit 09/12 15/17 Outdoor unit Pipe size 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 12.7 (1/2) (liquid / gas) A UNIT 6.35 (1/4) / 9.52 (3/8) - / - - / MAC-454JP B UNIT 1-5. SELECTING THE INSTALLATION LOCATION • Where it is not exposed to strong wind. Note: • Where airflow is good and dustless. When operating the air conditioner in low outside temperature, be sure • Where rain or direct sunshine can be avoided as much as possible. to follow the instructions described below. • Where neighbours are not annoyed by operation sound or hot air. • Never install the outdoor unit in a place where its air inlet/outlet side • Where rigid wall or support is available to prevent the increase of op- may be exposed directly to wind. eration sound or vibration.

  • Page 4: Installation Diagram

    (G) Refrigeration oil amount piece 20 mm (7.9 in.) or thicker between the wall and the piping (H) Putty or wrap 7 to 8 turns of insulation (I) Pipe fixing band 2 to 7 vinyl tape around the piping. (J) Fixing screw for (I) 2 to 7 To use existing piping, perform Open as a rule COOL operation for 30 minutes More than 500 mm (K) Wall hole sleeve and pump down before removing MXZ-2A20NA (19.69 in.) if the front Soft PVC hose, 15 mm (19/32 in.) and both sides are open the old air conditioner. Remake inner diameter or hard PVC pipe flare according to the dimension for new refrigerant. VP16 for drain socket * Note: Place indoor/outdoor unit connecting wire (B) and More than power supply cord (A) at least 1 m (39.4 in.) away 100 mm (3.94 in.) More than from the TV antenna wire. 200 mm (7.87 in.) if there are obstacles to both sides The “Q’ty” for (B) to (K) in the above table is quan-...

  • Page 5: Outdoor Unit Installation

    2. OUTDOOR UNIT INSTALLATION 2-1. CONNECTING WIRES FOR OUTDOOR UNIT • Be sure to use special circuits for room air conditioner. • Wiring work should be based on applicable technical standards. • Wiring connections should be made following the diagram. • Screws should be tightened so they won’t loosen. ELECTRICAL SPECIFICATIONS OUTDOOR UNIT MXZ-2A20NA Power supply (V, PHASE, Hz) 208/230, 1, 60 Max. Fuse size (time delay) (A) Min. Circuit Ampacity (A) Fan motor (F.L.A) 0.96 (R.L.A) 10.1 Compressor (L.R.A) Indoor unit-Remote controller : (Wireless) Control voltage Indoor unit-Outdoor unit : DC12-24V 1) Remove the service panel. 2) Fix the conduit connector to conduit cover with lock nut then secure it against unit with screws.

  • Page 6: Flaring Work And Pipe Connection

    3. FLARING WORK AND PIPE CONNECTION 3-1. FLARING WORK 1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2) No good 2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3) Good • Put the end of the copper pipe to downward direction as you Copper pipe remove burrs in order to avoid to let burrs drop in the piping. 3) Remove flare nuts attached to indoor and outdoor units, then put them on pipe having completed burr removal. (Not possible to put them on Tilted Uneven Burred after flaring work.) 4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension Fig. 1 Fig. 2 shown in the table. Select A mm from the table according to the tool you use. Flaring tool 5) Check Copper pipe...

  • Page 7: Purging Procedures, Leak Test, And Test Run

    4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN –0.101MPa 4-1. PURGING PROCEDURES AND LEAK TEST Compound pressure Stop valve cap [–760 mmHg gauge (for R410A) *4 to 5 turns (Torque 19.6 to 1) Remove service port cap of stop valve on the side of the outdoor unit (-30 in.Hg)] 29.4 N•m, 200 to Pressure gauge gas pipe. (The stop valve will not work in its initial state fresh out of 300 kgf•cm, 15 to *Close (for R410A) the factory, totally closed with cap on.) 22 ft•lb) *Open 2) Connect gauge manifold valve and vacuum pump to service port of Gauge manifold valve (for R410A) stop valve on the gas pipe side of the outdoor unit. 3) Run the vacuum pump. (Vacuumize for more than 15 minutes.) Handle High Handle 4) Check the vacuum with gauge manifold valve, then close gauge Hexagonal wrench Charge hose manifold valve, and stop the vacuum pump.
  • Page 8 4-3. TEST RUN • Be sure to perform the test run for each unit. Make sure each indoor unit operates properly following the installation manual attached to the unit. • If you perform the test run for all indoor units at once, you cannot detect any erroneous connection, if any, of the refrigerant pipes and the indoor/outdoor unit connecting wires. About the restart protective mechanism Once the compressor stops, the restart preventive device operates so the compressor will not operate for 3 minutes to protect the air conditioner. 4-4. EXPLANATION TO THE USER • Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner (how to use the remote controller, how to remove the air fil- ters, how to remove or put the remote controller in the remote controller holder, how to clean, precautions for operation, etc.) • Recommend the user to read the OPERATING INSTRUCTIONS carefully. JG79A039H01_En.indd 8 5/9/2008 2:23:44 PM...
  • Page 9 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN JG79A039H01 JG79A039H01_cover4.indd 2 5/9/2008 2:23:16 PM...

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