Midea MCCU-03CN1A, Installation Manual

Page: 9 / 13

7
installation manual installation manual
9 ELECTRIC CONNECTION
Use special power supply for the air conditioner. Design power
supplies specific to the indoor unit and outdoor unit. The supply
voltage must comply with the nominal voltage.
The external supply circuit of the air conditioner must have a
ground wire, and the power supply ground wire of the indoor unit
must be connected with the external ground wire firmly.
The wiring must be performed by professional technicians
according to the circuit diagram labels.
Distribute the wires according to the relevant electric technical
standards promulgated by the State, and set the Residual
Current-operated Circuit Breaker (RCCB) properly.
The power wire and the signal wire shall be laid out neatly and
properly, without mutual interference or contacting the
connection pipe or valve.
No power cable is attached to this equipment. The user can
select the power cable by reference to the stipulated power
supply specifications. No joint of wires is allowed.
Upon completion of wire connection, double check it and then
connect the power supply.
An all-pole disconnection device which has at least 3mm
separation distance in all pole and a residual current
device(RCD)with the rating of above 10mA shall be incorporated
in the fixed wiring according to the national rule.
The appliance shall be installed in accordance with national
wiring regulations.
CAUTION
Specifications of power supply
Power wires
The power wires are as follows: (schematic diagram)
Fig 9.1
Fig 9.2
Outdoor unit power supply RCCB Manual switch
Outdoor unit
NOTE
Pay attention to the phase sequence of the power supply. If the
phase sequence is reversed, the compressor will not start.
Meanwhile, the fault indicator of the outdoor electric control
board will light up. For details, see Outdoor unit wring diagram
on the cover plate of the electric control box .
After shifting the phase sequence, power on the unit until the
fault indicator goes out and the compressor starts up normally.
NOTE
10 ELECTRIC WIRE DIAGRAM
(MCCU-03CN1A) RVV-300/500 2X2.5+1x1.5 mm
2
(MCCU-05CN1A)
RVV-300/500 2X4.0+1x2.5 mm
2
(MCCU-07CN1A) RVV-300/500 2X6.0+1x4.0 mm
2
(MCCU-10CN1) RVV-300/500 4X4.0+1x2.5 mm 2
* 1: RVV-300/500 1X1.0 mm 2
* S: RVV-300/500 1X1.0 mm
2
(MCCU-14CN1)
RVV-300/500 4X4.0+1x2.5 mm
2
(MCCU-16CN1) RVV-300/500 4X10.0+1x6.0 mm 2
Fig 10.1
Power supply:
220-240V~ 50Hz
3-cord cable
Power supply:
380-415V 3N~ 50Hz
3-cord cable
Y/
G
Ground wiring
Ground wiring
Power supply
Switch/ Fuse
(Available locally)
Power wiring
(indoor)
Power linking wirng(Outdaoor)
Weak elec-signal link wiring
Indoor
unit
Outdoor unit
Power supply
Ground the air conditioner properly in case to affect its
anti-interference function
Please identify outdoor main unit and auxilary unit. Only main unit
connects with signal wire of indoor unit. Users should adjust the
dial on electric control board of outdoor unit as follows, otherwise
incorrect adjustment may cause malfunction.
Model Power
Switch capacity
of the main power
suppliy/fuse(A)
Outdoor unit power
cable includes
grounded wire
Connective
wire of indoor
outside unit
RVV-300/500
1X1.0 mm
2
MCCU-03CN1A 20/16
RVV-300/500
2X2.5+1X1.5 mm
2
220-240V~
50Hz
MCCU-05CN1A 30/20
RVV-300/500
2X4.0+1X2.5 mm
2
MCCU-07CN1A 40/30
RVV-300/500
2X6.0+1X4.0 mm
2
MCCU-10CN1 25/20
RVV-300/500
4X4.0+1X2.5 mm
2
380-415V
3N~ 50Hz
MCCU-14CN1 25/20
RVV-300/500
4X4.0+1X2.5 mm
2
MCCU-16CN1 45/35
RVV-300/500
4X10.0+1X6.0 mm
2
A
B C N 1
TO INDOOR UNIT
TO INDOOR UNIT
S
N
L
Y/G
TO INDOOR UNIT
1
2(
N)
Y/G
3
4
-
-
Power supply:
220-240V~ 50Hz
3-cord cable