Electrical Wiring - Outdoor Units - Mitsubishi Heavy Industries SRK50ZJ-S Technical Manual

POWER SOURCE 1～220ｰ240V 50Hz／1～220V 60Hz
TERMINAL
BLOCK
T1
FUSE
L
250V 20A
N
（WH）
（Y／G）
TERMINAL
BLOCK
T2
1
TO INDOOR UNIT
2
N
[ ]
2
POWER WIRES 1
3
N
SIGNAL WIRE 3
（Y／G）
Power cable, indoor-outdoor connecting wires
Model MAX running current Power cable size
2
（A）
（mm ）
50 2.0
14
The specifications shown in the above table are for units without heaters. For units with heaters, refer
to the installation instructions or the construction instructions of the indoor unit.
Switchgear of Circuit breaker capacity which is calculated from MAX. over current should be chosen
along the regulations in each country.
The cable specifications are based on the assumption that a metal or plastic conduit is used with no
more than three cables contained in a conduit and a voltage drop is 2%. For an installation falling
outside of these conditions, please follow the internal cabling regulations. Adapt it to the regulation
in effect in each country.
L
PWB ASSY （SUB）
R
（BK） IN
R R
O
（BK）
S
（WH）
IN
S S
O （WH）
（BR）
R
OUT S-1 S-2
（WH）
G1
（Y／G）
（BK）
CNMAIN CNSUB
CN20S
（RD）
C-2
（RD）
CNTH
20S
t゜ t゜ t゜
TH1 TH2 TH3
Power cable length indoor-outdoor Earth wire size
wire size x number
（m） （mm）
φ1.6mm x 3
18 φ1.6mm
PWB ASSY （MAIN）
POWER
TRANSISTOR
F8 F2
P
U
ACTIVE 250V 20A
250V 20A
+ + + NU
FILTER V
NV
UNIT
W
NW
F3 250V 1A
CNFAN
SWITCHING POWER
CIRCUIT
CNEEV
M
EEV
5 or 6 wires
Item Description
CM Compressor motor
CNEEV～CN20S Connector
EEV Electric expansion valve（coil）
FMo Fan motor
L Reactor
T1,2 Terminal block
TH1 Heat exchanger sensor（outdoor unit）
TH2 Outdoor air temp.sensor
TH3 Discharge pipe temp.sensor
U 20S Solenoid valve for 4 way valve
（RD）
V （WH） M
3～
W
（BK）
CM
Mark Color
BK Black
BR Brown
OR Orange
RD Red
M
WH White
FMo
Y Yellow
Y／G Yellow／Green