Connecting Remote Controller, Indoor And Outdoor Transmission Cables; Connecting Electrical Wires; Selecting The External Static Pressure - Mitsubishi Electric City Multi PFFY-WP20-VLRMM-E Installationshandbuch

Warning:
• Be sure to use specified wires for connections and ensure no external force is imparted to terminal connections. If connections are not fixed firmly, heat-
ing or fire may result.
• Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
Caution:
• Some installation sites may require attachment of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of
electric shock.
• 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.
Note:
• This device is intended for the connection to a power supply system with a maximum permissible system impedance (Refer to IEC61000-3-3.) at the inter-
face point (power service box) of the user's supply.
• The user must ensure that this device is connected only to a power supply system which fulfils the requirement above.
If necessary, the user can ask the public power supply company for the system impedance at the interface point.
7.2. 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
2
0.75 mm core cable. If the distance is more than 10 m, use a 1.25 mm
tion cable.
[Fig. 7.2.1] (P.4) MA Remote controller
[Fig. 7.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
• 9 to 13 VDC between 1 and 2 (MA remote controller)
• 24 to 30 VDC between M1 and M2 (M-NET remote controller)
[Fig. 7.2.3] (P.4) MA Remote controller
[Fig. 7.2.4] (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.

7.3. Connecting electrical wires

(Ensure that there is no slack on terminal screws.)
Make sure that the model name in the operation manual attached to the control
box cover is the same as that on the rating plate.
1. Remove the screw (2pcs) holding the cover to dismount the cover.
2. Open knockout holes.
(Recommend to use a screwdriver or the like for this work.)
[Fig. 7.3.1] (P.4)
A Control box
C Screw
E Remove
3. 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.
[Fig. 7.3.2] (P.4)
A Use PG bushing to keep the weight of the cable and external force from being
applied to the power supply terminal connector. Use a cable tie to secure the
cable.
B Power source wiring
D Use ordinary bushing
10
2
junc-
B TB15
D TB5
B Cover
D Knockout hole
C Tensile force
E Transmission wiring
4. Connect the power source, Earth, transmission and remote controller wiring.
[Fig. 7.3.3] (P.4)
A Power source terminal block
B Terminal block for indoor transmission
C Terminal block for remote controller
D To 1-phase power source
E Transmission line 30 VDC
F Terminal block for outdoor transmission line (TB3)
G Transmission line to the remote controller, terminal block for indoor unit and
BC controller
[Shield wire connection]
[Fig. 7.3.4] (P.4)
A Terminal block
C Shield wire
D The earth wire from two cables are connected together to the S terminal.
(Dead-end connection)
E Insulation tape (To keep the earth wire of the shielded cable from coming in
contact with the transmission terminal)
5. After wiring is complete, make sure again that there is no slack on the con-
nections, and attach the cover onto the terminal block box in the reverse
order of removal.
Notes:
• Do not pinch the cables or wires when attaching the terminal block box
cover. Doing so may cause a risk of disconnection.
• When accommodating the terminal block box, make sure that the con-
nectors on the box side are not removed. If removed, it cannot operate
normally.
Caution:
Fix the electrical wires at site using clamps.
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire may result.

7.4. Selecting the external static pressure

As the factory setting is for use under an external static pressure of 20 Pa, no
switch operation is needed when using under the standard condition.
External static pressure
20 Pa
40 Pa
60 Pa
[Fig. 7.4.1] (P.4)
<Address board>
B Round terminal
Switch operation
3
2
2
1
1
SWA SWC
3
2
2
1
1
SWA SWC
3
2
2
1
1
SWA SWC