Power Supply Wiring; Connecting Remote Controller, Indoor And Outdoor Transmission Cables; Connecting Electrical Connections; Setting Addresses - Mitsubishi Electric CITY MULTI Serie Manual De Instalación

2. Remote controller cables
Types of cables 2-core cable (unshielded)
Cable diameter 0.3 to 1.25 mm
Length Less than 200 m

8.1. 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 contact separation in each pole shall be provided
by the Air conditioner installation.
Power cable size: more than 1.5 mm
[Fig. 8.1.1] (P.4)
A Switch 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)]
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 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 mal-
function or fire.
8.2. 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 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 using a 0.75 mm
core cable. If the distance is more than 10 m, use a 1.25 mm
[Fig. 8.2.1] (P.4) MA Remote controller
[Fig. 8.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
• DC 9 to 13 V between 1 and 2 (MA remote controller)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
Notes:
*1 Put the transmission cable earth via the outdoor unit's earth terminal
to the ground.
*2 If the remote controller cable exceeds 10 m, use a 1.25 mm
cable 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.
[Fig. 8.2.3] (P.4) MA Remote controller
[Fig. 8.2.4] (P.4) M-NET Remote controller
A Non-polarized
C Remote Controller
• 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.
MA remote controller
2
2
B Overcurrent protection 16 A
2 junction cable.
2
diameter
B Upper level (TB15)
D Lower level (TB5)
Non-shielding wire for up to 10 m; the same specifications as "1." Wiring
transmission cables for more than 10 m
2
0.3 to 1.25 mm
Add any portion in excess of 10 m to within the longest allowable trans-
mission cable length 200 m (Shielding portion is more than 1.25 mm
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 transmission ter-
minal 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 connec-
tions, and attach the cover onto the control box in the reverse order removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise disconnec-
tion, heating or fire result.

8.3. Connecting electrical connections

(Be sure to prevent terminal screws from loosening.)
1. Remove 2 screws which secures the terminal bed box cover using a screw-
driver.
[Fig. 8.3.1] (P.4)
A Cover
2. As shown at 2, wire the power supply, transmission cable and remote control-
ler. There is no need to remove the terminal bed box.
[Fig. 8.3.2] (P.4)
C Terminal bed for transmission cable
D Transmission cable
(To terminal bed for remote controller, indoor unit and BC controller)
E To single-phase power supply
G To terminal bed for outdoor transmission cable
(Use shielding earth cable
H Non-polarity
J DC 24 to 30 V
• Fix power source wiring to control box by using buffer bushing for tensile force.
(PG connection or the like.) Connect transmission wiring to transmission ter-
minal bed through the knockout hole of control box using ordinary bushing.
3. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the control box in the reverse order of removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise disconnec-
2
tion, heating or fire may result.

8.4. Setting addresses

(Be sure to operate with the main power turned OFF.)
[Fig. 8.4.1] (P.4)
<Address board>
• There are two types of rotary switch setting available: setting addresses 1 to 9
and over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is "3", remain SW12 (for over 10) at "0", and match
SW11(for 1 to 9) with "3".
2 How to set branch numbers SW14 (Series R2 only)
Match the indoor unit's refrigerant pipe with the BC controller's end con-
nection number. Remain other than R2 at "0".
• The rotary switches are all set to "0" when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set
them referring to technical data.
Note:
Please set the switch SW5 according to the power supply voltage.
• Set SW5 to 240 V side when the power supply is 230 and 240 volts.
• When the power supply is 220 volts, set SW5 to 220 V side.
8.5. Sensing room temperature with the
built-in sensor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote control-
ler, set SW1-1 on the control board to "ON". The setting of SW1-7 and SW1-8 as
necessary also makes it possible to adjust the air flow at a time when the heating
thermometer is OFF.
M-NET remote controller
B Cover securing screw (2 places)
F Terminal bed for power supply
on outdoor unit side.)
I Network remote controller
2
)
11