Electrical Work - Mitsubishi Electric CITY MULTI PFFY-P20VKM-E Manuel D'installation

7. Electrical work

A
B
A Power supply terminal block (TB2)
B Outdoor unit terminal block (TB5)
Fig. 7-1
1 Indoor controller board
B A
M1 M2 M1 M2
TB3 TB5
B
2
M1 M2
TB3
Fig. 7-2
G
*1
H
I
*3
L1
Fig. 7-3
A
S CN3A M1 M2 S 1 2
TB5 TB15
a
C C
A A
M1 M2 S M1 M2 S
TB5 TB5
C C
J J J
L2 *2
K K L4
J J
r
K
L
L3
K K
7.1. Indoor unit (Fig. 7-1)
1 Remove the electrical cover.
• Remove one screw holding the electrical cover, then move the cover.
• Remove one screw holding the cord clamp, then move the clamp.
2 Connect the power line, control line from the outdoor unit, and remote con-
trol lines.
After connecting, secure the wires with the cord clamp.
s Fix power source wiring to control box using buffer bushing for tensile force.
(PG connection or the like.)
• Since the electric box may need to be pulled out for servicing or other occasions,
wires must have enough slack.
• Class 3 grounding work must be conducted (grounding wire diameter: 1.6 mm or
more)
After wiring is completed, reinstall the parts in the reverse order of removal.
Note:
• Power supply codes of appliance shall not be lighter than design 60245 IEC
53 or 60227 IEC 53.
• Install an earth longer and thicker than other cables.
• Power cable size: more than 1.5 mm
• A means for the disconnection of the supply with an isolation switch, or simi-
lar device, in all active conductors shall be incorporated in the fixed wiring.
• Selecting non-fuse breaker (NF) or earth leakage breaker (NV).
• A switch with at least 3 mm contact separation in each pole shall be provided
by the air conditioner installation.
Warning:
Wiring should be done so that the power lines are not subject to tension. Oth-
erwise, heat may be generated or fire may occur.
7.2. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 7-2)
• 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 connector for MA remote controller. (Non-polarized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
a MA remote controller cable (ACCESSORY 9)
2 M-NET Remote controller
• Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller. (Non-
polarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
Constraints on transmission cable (Fig. 7-3)
Longest wiring length (L +L +L or L
1 2 4
Length between indoor unit and remote controller (R): within 10 m
G Outdoor unit
H Earth
I BC controller
J Indoor unit
K M-NET Remote controller
L Non-polarized 2-wire
Note:
*1 Put the transmission cable earth via the outdoor unit's earth terminal
the ground.
*2 If the remote controller cable exceeds 10 m, use a 1.25 mm
over the exceeded portion, and add that exceeded portion to within 200 m.
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
2 .
2 junction cable.
+L or L +L +L ): less than 200 m
1 3 2 3 4
2 diameter cable
2
to
7