Electrical Work; Electric Wiring; Power Supply Wiring; Types Of Control Cables - Mitsubishi Electric CITY MULTI PKFY-P-VHM-E Manuel D'installation

6. Electrical work

PKFY-P·VHM-E
C
M
L
KLM
K H
55mm
N
Fig. 6-1
A B E
L N
C
TB2
Fig. 6-2
B A
1
M1 M2 M1 M2
TB3 TB5
B
2
M1 M2
TB3 TB5
3
Fig. 6-3
G D
F
E
12mm
L
N
M
M1 M2 S 1 2
TB5 TB15
A
S 1 2 M1 M2 S 1 2
TB15 TB5 TB15
C C
A A
M1 M2 S M1 M2 S
TB5
C C

6.1. Electric wiring

PKFY-P·VHM-E (Fig. 6-1)
Connection can be made without removing the front panel.
1. Open the front grille, remove the screw (1 piece), and remove the electrical
parts cover.
* Electrical work can be conducted more effectively with the panel removed.
A
When attaching the panel, check that the hooks N at five locations on the air
outlet side are connected securely.
B
2. Securely connect each wire to the terminal board.
* In consideration of servicing, provide extra length for each of the wires.
* Take care when using strand wires, because beards may cause the wiring to
short out.
3. Install the parts that were removed back to their original condition.
4. Fasten each of the wires with the clamp under the electrical parts box.
A Elactrical box cover
B Fixing screw
C Clamp
D Ground wire connection portion
E MA remote control terminal board: (1, 2) do not have polarity
F Transmission terminal board:
G Power supply terminal board (L, N, Earth).
H Lead
I Terminal screw
J Ground wire connection portion: Connect the ground wire in the direction illustrated in the
K Remote control cable
L Transmission cable
M Power supply cable
N Hook

6.2. Power supply wiring

• Power supply codes of appliance shall not be lighter than design 245 IEC 53 or
227 IEC 53.
• Install an earth line longer than other cables.
J
• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be
provided by the air conditioner installation.
Power cable size : more than 1.5mm
[Fig.6-2]
A Switch 16 A
B Overcurrent protection 16 A
C Indoor unit
D Total operating current be less than 16 A
E Pull box
Selecting non-fuse breaker (NF) or earth leakage breaker (NV).
For breaker, means shall be provided to ensure disconnection of all active
phase conductors of the supply.

6.3. Types of control cables

1. Wiring transmission cables
Types of transmission cable
Cable diameter
Length
2. M-NET Remote control cables
Types of remote control cable
Cable diameter
Length
3. MA Remote control cables
Types of remote control cable
Cable diameter
Length
6.4. Connecting remote controller, indoor and
outdoor transmission cables (Fig. 6-3)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire) The "S"
on indoor unit TB5 is a shielding wire connection. For specifications about the
connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote controller.
• 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
1 MA Remote controller
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2 M-NET Remote controller
• Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Nonpolarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
3 Wireless remote controller(When installing wireless signal receiver)
• Connect the wire of wireless signal receiver (9-pole cable) to CN90 of indoor
con-troller board.
• When more than two units are run under group control using wireless remote
controller, connect TB15 each with the same number.
• To change Pair No. setting, refer to installation manual attached to wireless re-
mote controller. (In the default setting of indoor unit and wireless remote control-
ler, Pair No. is 0.)
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable(M1(A), M2(B),
C Remote controller
D Wireless signal receiver
E Wireless remote controller
(M1, M2, S) do not have polarity
diagram.
2 (3-core)
Shielding wire CVVS or CPEVS
More than 1.25 mm 2
Less than 200m
Shielding wire MVVS
More than 0.5 to 1.25 mm 2
Add any portion in excess of 10m to within the
longest allowable transmission cable length 200m.
2-core cable (unshielded)
0.3 to 1.25 mm 2
Less than 200m
junction cable.
2
(S))
2
9