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2. OUTDOOR UNIT INSTALLATION
2-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel, top panel, front panel.
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 tightening,
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) Connect the demand control transmission cable to the terminal block for DRED
Interface.
7) Fix indoor/outdoor unit connecting wire (B) and power supply cord (A) with the
cable clamps.
8) Fix the demand control transmission cable with the cable strap.
9) Close the service panel , top panel, front panel securely. Make sure that 3-2. PIPE
CONNECTION is completed.
• After making connections between both power supply cord (A) and indoor/outdoor
unit connecting wire (B), be sure to fix both cable and wire with cable clamps.
Indoor/outdoor unit
<OUTDOOR UNIT>
connecting wire
(MXZ-2E)
(MXZ-3E)
(MXZ-4E)
Terminal block
Terminal block
Terminal block
Terminal block
(MXZ-2E)
<INDOOR UNIT>
(MXZ-3E)
(MXZ-4E)
This unit has demand response capability which is compliant with AS/NZS 4755.3.1. To activate this function, you need to make a contract with remote
agents such as electric supply company, then this unit should be connected to Demand response enabling devise (DRED). For further information,
consult your dealer. This unit supports 3 Demand Response Modes (DRMs): DRM1, DRM2 and DRM3.
• To prevent malfunction caused by noise, route the cord connecting this unit to DRED and the power supply cord as parallel as possible.
• Do not connect the demand control transmission cable to the terminal block for power supply.
• Do not pull, extremely bend or apply strong pressure on the wire to prevent failure.
• Do not screw DRED to outdoor unit.
• Do not put DRED in outdoor unit.
• Secure electrical wiring above clamp.
• Do not get DRED wire caught in the service panel.
3. FLARING WORK AND PIPE CONNECTION
3-1. FLARING WORK
1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2)
2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3)
• Aim the copper pipe downward while removing burrs to prevent burrs from
dropping in the pipe.
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 after flaring work.)
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the
table. Select A mm from the table according to the tool selected.
5) Check
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared section and do flaring work
again.
A (mm)
Pipe diameter
Nut
Clutch
Clutch
(mm)
(mm)
type tool
type tool
for R410A
for R22
ø6.35 (1/4")
17
ø9.52 (3/8")
22
0 to 0.5
1.0 to 1.5
ø12.7 (1/2")
26
ø15.88 (5/8")
29
AS/NZS4755
Terminal block for
terminal block
power supply
1 2 3 C
POWER SUPPLY
~/N 230 V 50 Hz
1 : DRM 1
2 : DRM 2
3 : DRM 3
C : COMMON
CAUTION
Tightening torque
Wing nut
type tool
N•m
kgf•cm
for R22
13.7 to 17.7 140 to 180
1.5 to 2.0
34.3 to 41.2 350 to 420
49.0 to 56.4 500 to 575
2.0 to 2.5
73.5 to 78.4 750 to 800
Front panel
Terminal block
for DRED Interface
15 mm
35 mm
Lead wire
• Be sure to attach each screw to its correspondent
terminal when securing the cord and/or the wire to
the terminal block.
• Make earth wire a little longer than others.
(More than 35 mm)
• For future servicing, give extra length to the con-
necting wires.
Good
Copper
pipe
Fig. 1
Copper pipe
Burr
Spare reamer
Pipe cutter
Fig. 3
Smooth all
around
Copper pipe
Die
Flare nut
Fig. 5
Top panel
Service panel
Terminal block
for power supply
Cable strap
The tip should be
pointed upwards.
No good
Tilted Uneven Burred
Fig. 2
Flaring tool
Clutch type
Wing nut type
Fig. 4
Inside is shin-
ing without any
scratches.
Even length
all around
Fig. 6
En-4
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