Indoor/Outdoor Units Connection Finishing And; Test Run - Mitsubishi Electric MXZ-3A54VA Installationsanleitung

• For the power supply cord and the indoor/outdoor unit connecting wires, be sure to use the ones in compli-
ance with the standards.
• Be sure to push the core until it is hidden and pull each cable to make sure that it is not pulled up. Incomplete
insertion may cause a risk of burning the terminal blocks.
Power supply cord Specification
Indoor and Outdoor connecting wire Specification
This installation manual is only for the outdoor unit installation. In installing the indoor units, refer to the
installation manual attached to each indoor unit.
Indoor/outdoor unit connecting wire
UNIT UNIT
1 Remove the service panel.
2 Remove fixing screw of terminal cover.
3 Connect the indoor/outdoor wire and power supply cable to the terminal block.
4 Replace the terminal cover securely.
Be sure that the indoor/outdoor unit
connecting wire B does not contact
the stop valve.
WARNING:
• • • • • Be sure to attach the service panel of the outdoor unit securely, otherwise it may result in a fire or an
electric shock from dust or water.
• • • • • Use the indoor/outdoor unit connecting wire that meets the Standards to connect the indoor and
outdoor units and fix the wire to the terminal block securely so that no external force is conveyed to
the connecting section of the terminal block. Incomplete connection or fixing of the wire could result
in a fire.
• • • • • Be sure to attach the terminal block cover on the both indoor and outdoor units. If the terminal block
cover is incorrectly attached, it may cause a risk of fire or electric shock due to dust or water pen-
etration.
Cable 3-core 2.5 mm 2 , in conformity with Design 245 IEC 57.
Cable 4-core 1.0/1.5 mm 2 , in conformity with Design 245 IEC 57.
<OUTDOOR UNIT>
POWER SUPPLY
~/N 230 V 50 Hz
UNIT UNIT
Firmly tighten the indoor/outdoor unit connecting
wire B and the power supply cord A.
Cable clamp
Power supply cord A
Route the indoor/outdoor unit connecting wire B and
the power supply cord A along with the unit.
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Î unit
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Ç unit
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ı unit
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Å unit

5. INDOOR/OUTDOOR UNITS CONNECTION FINISHING AND

TEST RUN

5-1 FLARED CONNECTIONS
PIPE LENGTH AND HEIGHT DIFFERENCE
Limits 3A54VA
Pipe length per indoor unit 25 m max.
Total pipe length for multi-system 50 m max.
Height difference 10 m max.
No. of bends per indoor unit 25 max.
Total No. of bends for multi-system 50 max.
Refrigerant adjustment ....... If pipe length exceeds 40 m, additional refrigerant (R410A) charge is required.
(The outdoor unit is charged with refrigerant for total pipe length up to 40 m.)
Up to 40 m
Pipe length
Exceeding 40 m
20 g/m × (refrigerant piping length(m)-40)
Refrigerant to be added
Indoor unit
Indoor unit
Indoor unit
Indoor unit
• For pipe size, see the table below.
SELECTING PIPE SIZE
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.
Model
Pipe size for indoor unit
name connection pipe size
22
Liquid pipe ø6.35 mm
25
Gas pipe ø9.52 mm
35
Liquid pipe ø6.35 mm
50
Gas pipe ø12.7 mm
Liquid pipe ø6.35 mm
60
Gas pipe ø15.88 mm
5
4A71VA
25 m max.
60 m max.
10 m max.
25 max.
60 max.
No additional charge is required.
Additional charge is required.
(Refer to the table below.)
Î UNIT
Ç UNIT
Outdoor
unit
ı UNIT
Å UNIT
(MXZ-4A71VA)
MXZ-4A71VA
Allowable
Valve size for outdoor unit
ø6.35 mm
Liquid pipe
Å UNIT
ø9.52 mm
Gas pipe
Liquid pipe
ø6.35 mm
ı UNIT
Gas pipe
ø12.7 mm
Liquid pipe
ø6.35 mm
Ç UNIT
ø15.88 mm Gas pipe
Liquid pipe
Î UNIT
Gas pipe
MXZ-3A54VA
Valve size for outdoor unit
Liquid pipe
Å UNIT
Gas pipe
Liquid pipe
ı UNIT
Gas pipe
Liquid pipe
Ç UNIT
Gas pipe
ø6.35 mm
ø12.7 mm
ø6.35 mm
ø9.52 mm
ø6.35 mm
ø9.52 mm
ø6.35 mm
ø9.52 mm
ø6.35 mm
ø9.52 mm
ø6.35 mm
ø9.52 mm
ø6.35 mm
ø9.52 mm