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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 top panel and the service panel.
2) Remove the conduit cover.
3) Attach the conduit connector to conduit cover with lock nut then se-
cure it to the unit with screws. Be sure to attach the conduit connec-
tors in the correct locations according to their sizes.
4) Connect ground wires to the TB support.
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 top panel and the service 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.
Screws
Service panel
Connecting order
• Connect the terminal
block in following order.
A → B → C → D → E → P
Power supply
Terminal block for
indoor/outdoor unit
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.
INDOOR UNIT
A – E
Terminal block
Grounding
terminal **
208/230 V AC
1 phase 60 Hz
Disconnect
switch *
Grounding
terminal **
Terminal block
A – E
OUTDOOR UNIT
Power supply (V, PHASE, Hz)
Max. Fuse size (time delay) (A)
Min. Circuit Ampacity (A)
Fan motor (F.L.A)
Compressor
Control voltage
(a) Power supply
(b) Indoor/outdoor
Lock nut
Conduit connector
P
P
D E
D E
A B C
A B C
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
Grounding
terminal **
GR
Ground
Terminal block
Terminal block
ELECTRICAL SPECIFICATIONS
OUTDOOR UNIT
(R.L.A)
(L.R.A)
Indoor unit-Remote controller : (Wireless)
Indoor unit-Outdoor unit : DC 2-24 V
Conduit connector
Conduit cover
Attach the conduit
connector (a)
Attach the conduit
connector (b)
P
P
D
E
D E
A B C
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 AWG4 or stranded conductor 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 AWG8.
• Use copper conductors only.
* Follow local electrical code.
GROUND WIRE
• Use solid or stranded conductor AWG8.
• Use copper conductors only.
* Follow local electrical code.
WARNING:
Use the indoor/outdoor unit connecting wire that meets the Stand-
ards 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. An incomplete connec-
tion or fixing of the wire could result in a fire.
For future servicing, give extra length to the connecting wires.
MXZ-5B42NA
208/230, , 60
40
36.2
.90
23.8
27
Trade size of conduit
3/4 in.
/2 in.
Terminal block
for power supply
En-4
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