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9.3. Connecting electrical connections
Verify 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 remove the cover.
[Fig. 9.3.1] (P.6)
A Screw holding cover (2pcs) B Cover
2. Open knockout holes
(Use a screwdriver or similar tool for this.)
[Fig. 9.3.2] (P.6)
A Ter minal block box B Knockout hole
C Remove
3. Attach power source wiring to terminal block box by using buffer bushing for
tensile force. (Conduit or similar.) Connect transmission wiring to transmission
terminal block through the knockout hole of terminal block box using ordinary
bushing.
[Fig. 9.3.3] (P.6)
A Use conduit to keep the weight of the cable and external force from being applied
to the power supply terminal connector.
B Power source wiring C Conduit
D Ter minal block box
E Knockout hole (for power source wiring)
F Washer (accessory) G Tensile force
H Use ordinary bushing I Transmission wiring
4. Connect the power source, Ground, transmission and remote controller wiring.
The dismounting of the terminal block box is not needed.
[Fig. 9.3.4] (P.6)
A Power source terminal block
B Transmission terminal block to outdoor unit
C Transmission terminal block to remote controller
[Shield wire connection]
[Fig. 9.3.5] (P.6)
A Ter minal block B Round terminal
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)
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, 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 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.
[Fig. 9.1.2] (P.5)
A Switch (Breakers for wiring and current leakage)
B Breakers for current leak
C Outdoor unit D Indoor unit
[Fig. 9.1.3] (P.5)
A Switch (Breakers for wiring and current leakage)
B Breakers for current leak
C Outdoor unit D Pull box
E Indoor unit F BC controller
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.
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.5) MA Remote controller
[Fig. 9.2.2] (P.5) 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.5) MA Remote controller
[Fig. 9.2.4] (P.5) M-NET Remote controller
A Non-polarized B TB15
C Remote Controller D TB5
• 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. Wiring under tension may break, or over-
heat and burn.
1. Use dedicated power supplies for the outdoor unit and indoor unit. Ensure OC and OS are wired individually.
2. Consider the ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. If the voltage drops, use a wire that is one rank thicker in diameter.
Make sure the power-supply voltage does not drop more than 10%.
4. Specific wiring requirements should adhere to local wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use shall not lighter than polychloroprene sheathed flexible cord (design 245 IEC57). For example, use
wiring such as YZW.
6. A switch with at least 3 mm [1/8 in] contact separation in each pole shall be provided by the air conditioner installation.
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, over
heating 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 a ground breaker for the inverter. If a ground breaker is not installed, there is a danger of electric shock.
• Do not use anything other than a breaker and fuse with the correct capacity. Using a fuse or wire of too large capacity may cause malfunction or fire.
Main cable
Swtich (A)
Minimum wire thickness (mm
2
[AWG])
Branch
Capacity Fuse
Breaker for
Ground
Model Unit combination
Breaker for current leakage
wiring (NFB)(A)
Outdoor unit
[PURY-P•
THMU-A]
PURY-P72THMU(-BS)
-
PURY-P96THMU(-BS)
-
PURY-P120THMU(-BS)
-
PURY-P72YHMU(-BS)
-
PURY-P96YHMU(-BS)
-
PURY-P120YHMU(-BS)
-
30 A 30 mA or 100 mA 0.1 sec. or less
40 A 100 mA 0.1 sec. or less
50 A 100 mA 0.1 sec. or less
15 A 30 mA or 100 mA 0.1 sec. or less
20 A 30 mA or 100 mA 0.1 sec. or less
25 A 30 mA or 100 mA 0.1 sec. or less
Maximum
current (A)
24.0
36.0
49.9
10.8
16.3
22.6
5.3 [10]
-
5.3 [10] 30 30 30
13.3 [6]
-
13.3 [6] 40 40 40
21.2 [4]
-
21.2 [4] 50 50 50
2.1 [14]
-
2.1 [14] 15 15 15
3.3 [12]
-
3.3 [12] 20 20 20
5.3 [10]
-
5.3 [10] 25 25 25
Outdoor unit
[PURY-P•
YHMU-A]