Connecting Remote Controller, Indoor And Outdoor Transmission Cables; Connecting Electrical Connections; Setting Addresses; Sensing Room Temperature With The Built-In Sensor In A Remote Controller - Mitsubishi Electric City Multi PLFY-P-NLMU-E Manuel D'installation

8.2. 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)
[Fig. 8.2.1] (P.5) MA Remote controller
[Fig. 8.2.2] (P.5) M-NET Remote controller
Terminal block for indoor transmission cable
Terminal block for outdoor transmission cable
MA Remote controller
M-NET Remote controller
• DC 10 to 13 V between 1 and 2 (MA remote controller)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 8.2.3] (P.5) MA Remote controller
[Fig. 8.2.4] (P.5) M-NET Remote controller
Non-polarized
MA Remote Controller
M-NET 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.
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
removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire result.
[Fig. 8.2.5] (P.5)
<Constraints on transmission cable>
Outdoor unit
BC controller
M-NET Remote controller
Notes:
*1 Take shielding ground on the outdoor unit's ground terminal
*2 If the remote controller cable exceeds 10 m [32 ft], use a 1.25 mm
[AWG16] cable over the exceeded portion, and add that exceeded por-
tion to within 200 m [656 ft].
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
12
Upper stage (TB15)
Lower stage (TB5)
Ground
Indoor unit
Non-polarized 2-wire
.
2

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. (A)
[Fig. 8.3.1] (P.5)
Side frame
Screw (2 places)
2. As shown at B, wire the power supply, transmission cable and remote con-
troller. There is no need to remove the terminal bed box.
[Fig. 8.3.2] (P.5)
<Viewed from bottom of the terminal bed box>
Terminal bed for transmission cable
Transmission cable
(To terminal bed for M-NET remote controller, indoor unit and BC controller)
To single-phase power supply
Terminal bed for power supply
To terminal bed for outdoor transmission cable
• Fix power source wiring to terminal bed box by using buffer bushing for ten-
sile force. (PG connection or the like.) Connect transmission wiring to trans-
mission terminal bed through the knockout hole of terminal bed box using
ordinary bushing.
3. After wiring is complete, make sure again that there is no slack on the con-
nections, and attach the cover onto the terminal bed box in the reverse order
of removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire may result.

8.4. Setting addresses

(Be sure to operate with the main power turned OFF.)
[Fig. 8.4.1] (P.5)
<Address Switch>
• There are two types of rotary switch setting available: setting addresses 1 to
9 and over 10, and setting branch numbers.
A 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".
B 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 series 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.
volts SW5
208 220V side
230 240V 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 con-
troller, 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 heat-
ing thermometer is OFF.
Cover