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2-2. 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.
1) Remove the service panel.
2) Remove the conduit plate.
3) Attach the conduit connector to conduit plate with lock nut then secure
it to the unit with screws. Be sure to attach the conduit connectors in
the correct locations according to their sizes.
4) Connect ground wires to the TB bed.
5) 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.
6) Firmly tighten the terminal screws to prevent them from loosening.
After tightening, pull the wires lightly to confirm that they do not move.
7) Perform 5) and 6) for each indoor unit.
8) Connect power supply cord (A).
9) Close the service panel securely. Make sure that 3-2. PIPE CON-
NECTION is completed.
Screws
Service panel
Connecting order
• Connect the terminal
block in following order.
MXZ-2C
A→B→P
MXZ-3C
A→B→C→P
MXZ-5C
A→B→C→D→E→P
Remark:
* A disconnect switch should be required. Check the local code.
** Use a ring tongue terminal in order to connect a ground wire to terminal.
A - B (MXZ-2C)
INDOOR UNIT
A - C (MXZ-3C)
A - E (MXZ-5C)
Terminal block
Grounding
terminal **
208/230 V AC
1 phase 60 Hz
Disconnect
switch *
Grounding
terminal **
Terminal block
A - B (MXZ-2C)
A - C (MXZ-3C)
A - E (MXZ-5C)
Conduit plate T
Handle
Lock nut
Conduit plate U
<MXZ-3C/5C only>
<MXZ-2C/3C>
P
Power supply
A B C
Terminal block for
indoor/outdoor unit
<MXZ-5C>
P
Power supply
D E
Terminal block for
A B C
indoor/outdoor unit
5/8 in.
-3/8 in.
(5 mm)
(35 mm)
Terminal block
Lead wire
Power supply
208/230 V AC
phase 2 wires 60 Hz
GR
Terminal block
Terminal block
OUTDOOR UNIT
ELECTRICAL SPECIFICATIONS
OUTDOOR UNIT MXZ-2C20NAHZ MXZ-3C24NAHZ MXZ-3C30NAHZ
Power supply (V,
PHASE, Hz)
Max. Fuse size
(time delay) (A)
Min. Circuit
28.9
Ampacity (A)
Fan motor (F.L.A)
(R.L.A)
Com-
pressor
(L.R.A)
Indoor unit-Remote controller : (Wireless)
Control voltage
Indoor unit-Outdoor unit : DC 2-24 V
Conduit connector
(a) Power supply
(b) Indoor/outdoor
Note:
• Removing the handle increases the effectiveness of the wiring operation.
• Be sure to reinstall the handle.
< 2C >
< 3C >
< 5C >
Attach the conduit
connector (a)
Conduit connector
P
A B C
P
D E
A B C
• Connect wires to the matching numbers of terminals.
• Be sure to attach each screw to its correspondent terminal
when securing the cord and/or the wire to the terminal block.
CONNECTING WIRES AND CONNECTING GROUND WIRE
• Use solid conductor Min. AWG4 or stranded conductor Min. AWG4.
• Use double insulated copper wire with 600 V insulation.
• Use copper conductors only.
* Follow local electrical code.
POWER SUPPLY CABLE
• Use solid or stranded conductor Min. AWG8.
• Use copper conductors only.
* Follow local electrical code.
GROUND WIRE
• Use solid or stranded conductor Min. AWG8.
Grounding
• Use copper conductors only.
terminal **
* Follow local electrical code.
WARNING:
• Use the indoor/outdoor unit connecting wire that meets the
Standards to connect the indoor and outdoor units and fix the
Ground
wire to the terminal block securely so that no external force is
conveyed to the connecting section of the terminal block. An
incomplete connection or fixing of the wire could result in a fire.
For future servicing, give extra length to the connecting wires.
• Turn on the main power when the ambient temperature is -4°F
(-20°C) or higher.
• Under conditions of -4°F (-20°C), it needs at least 4hr stand by
before the units operate in order to warm the electrical parts.
208/230, , 60
40
29.9
29.9
.90
20
28.8
Trade size of conduit
3/4 in.
/2 in.
Conduit plate U
Conduit plate T
<MXZ-3C/5C only>
Attach the conduit
connector (b)
P
P
A B C
A B C
P
P
D
E
D E
A B C
A B C
MXZ-5C42NA
3.9
* C : MXZ-3C only
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