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8.1. Power supply wiring
•
A switch with at least 3 mm [1/8 in] contact separation in each pole shall be
provided by the Air conditioner installation.
Wire size for Main Power Supply and On/Off Capacities.
2
•
Minimum Wire size (mm
/AWG)
•
Switch (A)
•
Breaker for Wiring (NFB)
•
Breaker for Current Leakage
[Fig. 8.1.1] (P.4)
A Switch 16 A (Breakers for Current Leakage)
B Switch 16 A (Breakers for Wiring or Main Switch)
C Indoor unit
E Pull box
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 TB15. (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
2
1.25 mm
[AWG16] junction cable.
[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)
[Fig. 8.2.3] (P.4) MA Remote controller
[Fig. 8.2.4] (P.4) M-NET Remote controller
A Non-polarized
C MA Remote Controller
E 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 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.
[Fig. 8.2.5] (P.4)
<Constraints on transmission cable>
G Outdoor unit
I BC controller
K Remote controller
10
Main Cable: 0.41/22
Branch:
0.41/22
Ground:
0.41/22
Capacity: 15 Fuse: 15
: 15 A
: 20 A 30 mA 0.1 sec. or less
D Total operating current be less than 16 A
B Upper level (TB15)
D Lower level (TB5)
H Earth
J Indoor unit
L Non-polarized 2-wire
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 [32 ft], use a 1.25 mm
16] cable over the exceeded portion, and add that exceeded portion to
within 200 m [656 ft].
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
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.
2. Wire the power supply, transmission cable and remote controller. There is no
need to remove the terminal bed box.
[Fig. 8.3.1] (P.4)
C Terminal bed for transmission cable
D Transmission cable
(To terminal bed for M-NET 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
•
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-
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 switch>
•
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 (Series R2 only)
Match the indoor unit's refrigerant pipe with the BC controller's end con-
nection number. Remain SW14 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.
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.
2
[AWG
F Terminal bed for power supply
on outdoor unit side.)
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