Electrical Work; Connecting Remote Controller, Indoor And Outdoor Transmission Cables; Power Supply Wiring - Hitachi Mr. SLIM PEA-M200LA Installationshandbuch

8. Electrical work

Precautions on electrical wiring
Warning:
Electrical work should be done by qualified electrical engineers in accordance
with "Engineering Standards For Electrical Installation" and supplied installa-
tion manuals. Special circuits should also be used. If the power circuit lacks
capacity or has an installation failure, it may cause a risk of electric shock or
fire.
1. Be sure to install an earth leakage breaker to the power.
2. Install the unit to prevent that any of the control circuit cables (remote controller,
transmission cables) is brought in direct contact with the power cable outside the
unit.
3. Ensure that there is no slack on all wire connections.
4. Some cables (power, remote controller, transmission cables) above the ceiling
may be bitten by mouses. Use as many metal pipes as possible to insert the
cables into them for protection.
5. Never connect the power cable to leads for the transmission cables. Otherwise
the cables would be broken.
6. Be sure to connect control cables to the indoor unit, remote controller, and the
outdoor unit.
7. Put the unit to the ground on the outdoor unit side.
Caution:
• Be sure to put the unit to the ground on the outdoor unit side. Do not connect
the earth cable to any gas pipe, water pipe, lightening rod, or telephone earth
cable. Incomplete grounding may cause a risk of electric shock.
• If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
Types of control cables
1. Wiring transmission cables
Note:
• Transmission cables shall not be lighter than polychloroprene sheathed
flexible cord. (Design 60245 IEC 57)
• Cable diameter
2
More than 1.5 mm
• Cable length
Less than 80 m.
• Circuit rating
S1 - S2: 230V AC
S2 - S3: 24V DC
* The figures are not always against the ground.
S3 terminal has 24V DC against S2 terminal. However between S3 and S1, these
terminals are not electrically insulated by the transformer or other device.
2. Remote controller cables
Types of cables Sheathed 2-core cable (unshielded) CVV
Cable diameter 0.3 to 1.25 mm
Length Less than 500 m
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
IEC57)
3. Install an earth longer than other cables.
4. Indoor and outdoor connecting wires have polarities. Make sure to match
the terminal number (S1, S2, S3) for correct wirings.
5. Wiring for remote controller cable shall be apart (5 cm, 2 inch or more) from
power source wiring so that it is not influenced by electric noise from power
source wiring.

8.1. Power supply wiring

• Power supply cords of appliances shall not be lighter than design 60245 IEC 57 or
60227 IEC 57.
• A switch with at least 3 mm contact separation in each pole shall be provided by the
Air conditioner installation.
Power cable size: more than 1.6 mm
[Fig. 8-1-1]
A B
C
A Switch 16 A
B Overcurrent protection 16 A
C Indoor unit
[Selecting non-fuse breaker (NF) or earth leakage breaker (NV)]
To select NF or NV instead of a combination of Class B fuse with switch, use the
following:
8
MA remote controller
2
2
• In the case of Class B fuse rated 15 A or 20 A,
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.
Caution:
Do not use anything other than the correct capacity breaker and fuse. Using
fuse, wire or copper wire with too large capacity may cause a risk of malfunc-
tion or fire.
8.2. Connecting remote controller, indoor and outdoor
transmission cables
Warning:
• The compressor will not operate unless the indoor/outdoor transmission
phase connection is correct.
• The connection wiring between the outdoor and indoor units can be
extended up to a maximum of 50 meters, and the total extension including
the crossover wiring between rooms is a maximum of 80 m.
• Connect indoor unit TB4 and terminal block for indoor-outdoor transmission line.
(polar 3-core)
2
Cable 3-core 1.5 mm , in conformity with design 60245 IEC 57.
• Install a remote controller following the manual supplied with the remote controller.
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• Connect the remote controller's transmission cable within 10 m using a 0.75 mm
core cable. If the distance is more than 10 m, use a 1.25 mm
[Fig. 8-2-1] MA Remote controller
B A
S1 S2 S3 S1 S2 S3
TB4
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
• DC 9 to 13 V between 1 and 2 (MA remote controller)
[Fig. 8-2-2] MA Remote controller
B
D
1
S2
S1
N
L
A Non-polarized
B TB15
C Remote Controller
D TB4
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
2
junction cable.
1 2
TB15
C
2
A
S3
DC10~13V
C
A B
1 2
2