Power Supply Wiring; Connecting Remote Controller, Indoor And Outdoor Transmission Cables - Mitsubishi Electric CITY MULTI PEFY-P-NMHSU-E Manuel D'installation

<Table 1>
Type of cable
Cable diameter
Maximum length of transmission lines for centralized control and indoor/outdoor
transmission lines (Maximum length via indoor units): 500 m [1640 ft] MAX
Remarks
The maximum length of the wiring between power supply unit for
transmission lines (on the transmission lines for centralized control) and
each outdoor unit and system controller is 200 m [656 ft].
*1 Connected with simple remote controller.

9.1. Power supply wiring

• Power supply cords of appliances shall not be lighter than design 245 IEC 57 or 227 IEC 57.
• A switch with at least 3 mm [1/8 in] contact separation in each pole shall be provided by the Air conditioner installation.
[Fig. 9.1.1] (P. 4)
A Ground-fault interrupter
B Local switch/Wiring breaker
C Indoor unit
Model Ground-fault interrupter
*1, *2
PEFY-P-NMHSU-E 15 A 30 mA 0.1sec. or less
*1 The Ground-fault interrupter should support Inverter circuit. (e.g. Mitsubishi Electric's NV-C series or equivalent).
*2 Ground-fault interrupter should combine using of local switch or wiring breaker.
*3 It shows data for B-type fuse of the breaker for current leakage.
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 malfunction
or fire.
• Backup operation
Even when the electrical work has not been completed, the fan and the drain pump can be operated by connecting the jumper (SWE) on the control board to the ON-
side and energizing the terminal block.
SWE SWE
OFF ON OFF ON
Reconnect the SWE on the control board to the OFF-side upon completion of all work.
9.2. Connecting remote controller, indoor
and outdoor transmission cables
(Remote contoroller is optionally available.)
• 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 con-
troller.
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Non-polarized 2-wire)
• Connect the remote controller's transmission cable within 10 m [32 ft] using a
2
0.75 mm [AWG18] core cable. If the distance is more than 10 m [32 ft], use a
1.25 mm 2 [AWG16] junction cable.
[Fig. 9.2.1] (P.4) MA Remote controller
[Fig. 9.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
• DC 10 to 13 V between 1 and 2 (MA remote controller)
10
Transmission cables
Shielding wire (2-core)
CVVS, CPEVS or MVVS
2
More than 1.25 mm [AWG16]
Max length: 200 m [656 ft]
Local switch
Breaker capacity
<A>
16
ME Remote controller cables
Sheathed 2-core cable (unshielded) CVV
0.3 ~ 1.25 mm 2 [AWG22 to 16]
2
(0.75 ~ 1.25 mm [AWG18 to 16])*1
When 10 m [32 ft] is exceeded,
use cables with the same
specification as transmission
cables.
CVVS, MVVS: PVC insulated PVC jacketed shielded control cable
CPEVS: PE insulated PVC jacketed shielded communication cable
CVV: PVC insulated PVC sheathed control cable
Wiring breaker
Over-current protector*3 (Non-fuse breaker)
<A> <A>
16 16
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 9.2.3] (P.4) MA Remote controller
[Fig. 9.2.4] (P.4) M-NET Remote controller
A Non-polarized
C Remote Controller
E Clamp
• Wind the transmission and remote controller wires around the clamp once to
keep them from being pulled out.
• The MA remote controller and the M-NET remote controller cannot be used
at the same time or interchangeably.
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
• Fix power source wiring to control box by using buffer bushing for tensile
force. (PG connection or the like.) Connect transmission wiring to transmis-
sion terminal block through the knockout hole of control box using ordinary
bushing.
• After wiring is complete, make sure again that there is no slack on the con-
nections, and attach the cover onto the control box in the reverse order re-
moval.
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire result.
MA Remote controller cables
0.3 ~ 1.25 mm 2 [AWG22 to 16]
2
(0.75 ~ 1.25 mm [AWG18 to 16])*1
Max length: 200 m [656 ft]
Minimum Wire thickness
Power wire Earth wire
<mm 2 > <mm 2 >
2 2
B TB15
D TB5