4
e n
2 - 2 . C O N N E C T I N G W
I R E S F O R O U T D O O R U N I T
• Be sure to use special circuits for room air conditioner.
• Wiring w ork should be based on applicable technical standards.
• Wiring connections should be made follow ing the diagram.
• Screw s should be tightened so they w on’t loosen.
ELECTRICAL SPECIFICATIONS
OUTDOOR UNIT
MXZ-2C20NAHZ3 MXZ-3C24NAHZ3 MXZ-3C30NAHZ3
MXZ-5C42NA3
Pow er supply
(V, PHASE, Hz)
208/230, 1, 60
Max. Fuse size
(time delay) (A)
40
Min. Circuit
Ampacity (A)
28.9
29.9
29.9
31.9
Fan motor
(F.L.A)
1.90
Com-
pressor
(R.L.A)
20
(L.R.A)
28.8
Control voltage
Indoor unit-Remote controller : (Wireless)
Indoor unit-Outdoor unit : DC 12-24 V
1-3/8 in.
(35 mm)
5/8 in.
(15 mm)
Lead w ire
1) Remove the service panel.
2) Remove the conduit plate.
3) Attach the conduit connector to conduit plate w ith lock nut then secure
it to the unit w ith screw s. Be sure to attach the conduit connectors in
the correct locations according to their sizes.
4) Connect ground w ires to the TB bed.
5) Loosen terminal screw , and connect indoor/outdoor unit connecting
w ire (B) from the indoor unit correctly on the terminal block. Be careful
not to make mis-w iring. Fix the w ire 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) irmly tighten the terminal scre s to prevent them from loosening. After
tightening, pull the ires lightly to confirm that they do not move.
7) Perform 5) and 6) for each indoor unit.
8) Connect pow er supply cord (A).
9) Close the service panel securely. Ma e sure that 3-2. PIPE CONNEC
-
TION is completed.
Connecting order
• Connect the terminal
block in follow ing order.
Pow er supply
Terminal block for
indoor/outdoor unit
Service panel
Screw s
Lock nut
Conduit connector
C O N N E C T I N G W
I R E S A N D C O N N E C T I N G G R O U N D W
I R E
• Use solid conductor Min. AWG14 or stranded conductor Min. AWG14.
• Use double insulated copper w ire w ith 600 V insulation.
• Use copper conductors only.
*
F o l l o w l o c a l e l e c t ri c a l c o d e .
P O W
E R S U P P L Y C A B L E
• Use solid or stranded conductor Min. AWG8.
• Use copper conductors only.
*
F o l l o w l o c a l e l e c t ri c a l c o d e .
G R O U N D W
I R E
• Use solid or stranded conductor Min. AWG8.
• Use copper conductors only.
*
F o l l o w l o c a l e l e c t ri c a l c o d e .
W
A R N I N G :
• U s e t h e i n d o o r/ o u t d o o r u n i t c o n n e c t i n g w i re t h a t m e e t s t h e S t a n d -
ards to connect the indoor and outdoor units and fix the ire to
t h e t e rm i n a l b l o c k s e c u re l y s o t h a t n o e x t e rn a l fo rc e i s c o n v e y e d
t o t h e c o n n e c t i n g s e c t i o n o f t h e t e rm i n a l b l o c k . A n i n c o m p l e t e
connection or fixing of the ire could result in a fire.
R e m a rk :
* A disconnect sw itch should be required. Check the local code.
** Use a ring tongue terminal in order to connect a ground w ire to terminal.
• C o n n e c t w i re s t o t h e m a t c h i n g n u m b e rs o f t e rm i n a l s .
• B e s u re t o a t t a c h e a c h s c re w t o i t s c o rre s p o n d e n t t e rm i n a l w h e n
s e c u ri n g t h e c o rd a n d / o r t h e w i re t o t h e t e rm i n a l b l o c k .
GR
Terminal block
Grounding
terminal **
2 0 8 / 2 3 0 V A C
1 p h a s e 6 0 H z
Grounding
terminal **
Terminal block
Ground
OUTDOOR UNIT
Pow er supply
208/230 V AC
1 phase 2 w ires 60 Hz
Disconnect
sw itch *
Grounding
terminal **
Terminal block
Terminal block
Terminal block
or future servicing, give extra length to the connecting ires.
Conduit connector
Trade size of conduit
(a) Pow er supply
3/4 in.
(b) Indoor/outdoor
1/2 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
Pow er supply
Terminal block for
indoor/outdoor unit
<MXZ-2C/3C>
<MXZ-5C>
N o t e :
• Removing the handle increases the effectiveness of the iring operation.
• Be sure to reinstall the handle.
<MXZ-3C/5C only>
Handle
• T u rn o n t h e m a i n p o w e r w h e n t h e a m b i e n t t e m p e ra t u re i s - 4 ° F
( - 2 0 ° C ) o r h i g h e r.
• U n d e r c o n d i t i o n s o f - 4 ° F ( - 2 0 ° C ) , i t n e e d s a t l e a s t 4 h r s t a n d b y
b e fo re t h e u n i t s o p e ra t e i n o rd e r t o w a rm t h e e l e c t ri c a l p a rt s .
VG79N001H01_01En.indd 4
2021/07/13 12:24:06
