Mitsubishi Electric MXZ-2C20NAHZ, Руководство по установке, Страница: 5 / 24

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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.
ELECTRICAL SPECIFICATIONS
OUTDOOR UNIT MXZ-2C20NAHZ MXZ-3C24NAHZ MXZ-3C30NAHZ MXZ-5C42NA
Power supply (V,
PHASE, Hz)
208/230, , 60
Max. Fuse size
(time delay) (A)
40
Min. Circuit
Ampacity (A)
28.9 29.9 29.9 3.9
Fan motor (F.L.A) .90
Com-
pressor
(R.L.A) 20
(L.R.A) 28.8
Control voltage
Indoor unit-Remote controller : (Wireless)
Indoor unit-Outdoor unit : DC 2-24 V
-3/8 in.
(35 mm)
5/8 in.
(5 mm)
Lead wire
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.
Connecting order
• Connect the terminal
block in following order.
Power supply
Terminal block for
indoor/outdoor unit
Service panel
Screws
Lock nut
Conduit connector
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.
• Use copper conductors only.
* 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
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.
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.
• 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.
GR
Terminal block
Grounding
terminal **
208/230 V AC
1 phase 60 Hz
Grounding
terminal **
Terminal block
Ground
OUTDOOR UNIT
Power supply
208/230 V AC
phase 2 wires 60 Hz
Disconnect
switch *
Grounding
terminal **
Terminal block Terminal block
Terminal block
For future servicing, give extra length to the connecting wires.
Conduit connector Trade size of conduit
(a) Power supply 3/4 in.
(b) Indoor/outdoor /2 in.
Conduit plate U
Conduit plate T
< 2C >
< 3C >
< 5C >
A B C
P
A B C
P
A B C A B C
P P
MXZ-2C A→B→P
MXZ-3C A→B→C→P
MXZ-5C A→B→C→D→E→P
A
-
B
(MXZ-2C)
A
-
C
(MXZ-3C)
A
-
E
(MXZ-5C)
INDOOR UNIT
A
-
B
(MXZ-2C)
A
-
C
(MXZ-3C)
A
-
E
(MXZ-5C)
*
C
: MXZ-3C only
Attach the conduit
connector (a)
Attach the conduit
connector (b)
Conduit plate U
<MXZ-3C/5C only>
Conduit plate T
A B C
D E
P
A B C
D E
P
A B C
E
P
A B C
D E D
P
Power supply
Terminal block for
indoor/outdoor unit
<MXZ-2C/3C>
<MXZ-5C>
Note:
• Removing the handle increases the effectiveness of the wiring operation.
• Be sure to reinstall the handle.
<MXZ-3C/5C only>
Handle
• 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.
BH79A088H01_en.indd 4 2014/08/05 13:34:48