Mitsubishi Electric Mr.SLIM PSA-M-KA Series Installation Manual page 10

6. Electrical work
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Indoor unit earth
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
*1. <For 25-140 outdoor unit application>
Max. 45 m
If 2.5 mm 2 used, Max. 50 m
If 2.5 mm used and S3 separated, Max. 80 m
2
<For 200/250 outdoor unit application>
Max. 18 m
If 2.5 mm used, Max. 30 m
2
If 4 mm used and S3 separated, Max. 50 m
2
If 6 mm used and S3 separated, Max. 80 m
2
*2. The figures are NOT always against the ground.
S3 terminal has 24 VDC / 28 VDC against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
*3. It depends on the outdoor unit.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC
57)
3. Install an earth longer than other cables.
6.1.2. Separate indoor unit/outdoor unit power supplies (For PUHZ application only)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
* The optional wiring replacement kit is required.
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
* The optional wiring replacement kits are required.
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
en
If the indoor and outdoor units have separate power supplies, refer to the table at the
below. If the optional wiring replacement kit is used, change the indoor unit electrical
box wiring refering to the figure in the right and the DIP switch settings of the outdoor
unit control board.
Indoor power supply terminal kit (option)
Indoor unit electrical box connector con-
nection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)
* There are three types of labels (labels A, B, and C). Affix the appropriate labels to
the units according to the wiring method.
9
*1
3 × 1.5 (polar)
*1 1 × Min. 1.5
1 × Min. 1.5
*2
–
*2 230 VAC
*2 *3 24 VDC / 28 VDC
1:1 System
L
B
B C C
J
A N
S1
S2
S3
Simultaneous twin/triple/quadruple system
B
C
B C
J
A
Indoor unit specifications
Required
Required
Required
ON 3
(SW8)
OFF 1 2
L
N
S1
S2
S3
H H H H
K K K K
Connectors (connections when shipped
Electric heater
from the factory are for indoor unit power
(For models with
supplied from outdoor unit)
heater)
L
N
BLACK
CN01
Indoor unit
control board
S1
S2
S3
Indoor unit power supplied from outdoor unit
(when shipped from factory)
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Controller
G Indoor unit
H Option
J Indoor unit power supply
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Controller
G Indoor unit
H Option
J Indoor unit power supply
K Indoor unit earth
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
Electric heater
(For models with
heater)
Connectors
L
N
BLACK
CN01
Indoor unit
S1 control board
S2
S3
Separate indoor unit/outdoor unit power
supplies