Mitsubishi Electric City Multi PEFY-P06 NMSU-E Installation Manual page 12

9.2. 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 [32 ft] using a
0.75 mm 2 [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 9 to 13 V between 1 and 2 (MA remote controller)
• 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
• The MA remote controller and the M-NET remote controller cannot be used at
the same time or interchangeably.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
9.3. Connecting electrical connections
Please identify the model name of the operation manual attached on the terminal
bed box cover with that shown on the rating name plate.
1. Remove the screw (2pcs) holding the cover to dismount the cover.
[Fig. 9.3.1] (P.5)
A Screw holding cover (2pcs)
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 9.3.2] (P.5)
A Terminal bed box
C Remove
3. Fix power source wiring to terminal bed box by using buffer bushing for tensile
force. (Conduit or the like.) Connect transmission wiring to transmission termi-
nal bed through the knockout hole of terminal bed box using ordinary bushing.
[Fig. 9.3.3] (P.5)
E Use conduit to keep the weight of the cable and external force from being applied
to the power supply terminal connector.
F Power source wiring
H Terminal bed box
I Knockout hole (for power source wiring)
J Washer (accessory)
L Use ordinary bushing
4. Connect the power source, Ground, transmission and remote controller wiring.
The dismounting of the terminal bed box is not needed.
[Fig. 9.3.4] (P.5)
N Power source terminal bed
P Terminal bed for remote controller
R Transmission line DC 30 V
S Terminal bed for outdoor transmission line (TB3)
T Transmission line to the remote controller, terminal bed for indoor unit and BC
controller
[Shield wire connection]
[Fig. 9.3.5] (P.5)
A Terminal bed
C Shield wire
D The ground wire from two cables are connected together to the S terminal. (Dead-
end connection)
E Insulation tape (To keep the ground wire of the shielded cable from coming in
contact with the transmission terminal)
12
B TB15
D TB5
B Cover
B Knockout hole
G Conduit
K Tensile force
M Transmission wiring
O Terminal bed for indoor transmission
Q To 1-phase power source
B Round terminal
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the terminal bed box in the reverse order of
removal.
Notes:
• Do not pinch the cables or wires when attaching the terminal bed box
cover. Doing so may cause a risk of disconnection.
• When accommodating the terminal bed box, make sure that the connec-
tors on the box side are not removed. If removed, it cannot operate nor-
mally.
9.4. External I/O specifications
Caution:
1. Wiring should be covered by insulation tube with supplementary insula-
tion.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
9.5. Selecting the external static pressure
As the factory setting is for use under an external static pressure of 0.06 in. WG
(15 Pa), no switch operation is needed when using under the standard condition.
External static pressure
0.02 in. WG
(5 Pa)
0.06 in. WG
(15 Pa)
0.14 in. WG
(35 Pa)
0.20 in. WG
(50 Pa)
[Fig. 9.5.1] (P.5)
<Address board>
A SWA
C SW1
E SW12
9.6. Setting addresses
(Be sure to operate with the main power turned OFF.)
[Fig. 9.5.1] (P.5)
<Address board>
A SWA
C SW1
E SW12
• 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)
The branch number assigned to each indoor unit is the port number of the
BC controller to which the indoor unit is connected.
Leave it to "0" on the non-R2 series of units.
• 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 the Data Book.
9.7. 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.
Note:
• To perform the auto cooling/heating operation, use the built-in sensor in
a remote controller or the optional remote sensor.
Switch operation
SWA SWC
2
3
2
1
1
SWA SWC
2
3
2
1
1
SWA SWC
2
3
2
1
1
SWA SWC
2
3
2
1
1
B SWC
D SW11
F SW14
B SWC
D SW11
F SW14