Mitsubishi Electric CITY MULTI PLFY-P NAMU-E Series Installation Manual page 7

6. Electrical work
A B
C C
E
Fig. 6-1
B A
1
M1 M2 M1 M2 S 1
TB3 TB5
D
E
Fig. 6-2
B
2
M1 M2 M1 M2
TB3 TB5
D
E
Fig. 6-3
G
*1
H
I
*3
J
L1
K
K
Fig. 6-4
A Switch 15 A
B Overcurrent protection 15 A
C Indoor unit
D Total operating current be less than 15 A
E Ground
D
C C C C C
A
2 M1 M2 S 1 2
TB15 TB5 TB15
C C
A A
S M1 M2 S
TB5
C C
J J
L2 *2
K L4
J J
r
K
L
L3
K
6.1. Power supply wiring (Fig. 6-1)
Power cable size (diameter) : more than 1.6 mm (AWG14)
Ground cable size (diameter) : 1.6 mm (AWG14)
* Use copper supply wires.
* Use the electric wires over the rating voltage 300 V.
[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:
• 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 sec.
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.
6.2. Connecting remote controller, indoor and outdoor
transmission cables
• 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 33 ft (10 m) using a
0.75 mm 2 (AWG18) core cable. If the distance is more than 33 ft (10 m), use a 1.25
mm 2 junction cable.
1 MA Remote controller (Fig. 6-2)
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-polar-
ized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2 M-NET Remote controller (Fig. 6-3)
• 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
Longest wiring length (L +L +L or L +L
1 2 4 1 3
Length between indoor unit and remote controller (R): within 33 ft (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 33 ft (10 m), use a 1.25 mm
diameter cable over the exceeded portion, and add that exceeded portion
to within 656 ft (200 m).
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
Types of control cables (Fig. 6-4)
1. Wiring transmission cables: Shielding wire CVVS or CPEVS
• Cable diameter: More than 1.25 mm 2 (AWG16)
2. M-NET Remote control cables
Kind of remote control cable 2-core cable (unshielded)
Cable diameter More than 0.5 (AWG20) to 0.75 mm
When 10 m is exceeded, use cable with the
same specifications as transmission line wiring
Remarks
(shielding portion is more than 1.25 mm
(AWG16))
3. MA Remote control cables
Kind of remote control cable 2-core cable (unshielded)
Cable diameter 0.3 mm
D Transmission cables
E Remote control cables
or L +L +L ): less than 656 ft (200 m)
2 3 4
to
2 (AWG16)
2 (AWG18)
2 (AWG22) to 1.25 mm 2 (AWG16)
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