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Types of control cables
1. Wiring transmission cables
•
Types of transmission cables : Shielding wire CVVS or CPEVS
•
Cable diameter : More than 1.25 mm
•
Maximum wiring length : Within 200 m [656ft]
•
Maximum length of transmission lines for centralized control and indoor/out-
door transmission lines (Maximum length via indoor units) : 500 m [1640ft]
MAX
The maximum length of the wiring between power supply unit for transmis-
sion lines (on the transmission lines for centralized control) and each outdoor
unit and system controller is 200 m [656ft].
2. Remote control cables
•
M-NET Remote Controller
Kind of remote control cable
0.3 to 1.25 mm
Cable diameter
(0.75 to 1.25 mm
When 10 m [32ft] is exceeded, use cable
Remarks
with the same specifications as 1. Wiring
transmission cables.
•
MA Remote Controller
Kind of remote control cable
0.3 to 1.25 mm
Cable diameter
(0.75 to 1.25 mm
Remarks
Within 200 m [656ft]
*
Connected with simple remote controller.
9.1. Power supply wiring
•
Power supply cords of appliances shall not be lighter than design 245 IEC 57
or 227 IEC 57.
•
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 Witing (NFB)
•
Breaker for Current Leakage
[Fig. 9.1.1] (P. 5)
Switch 15 A (Breakers for Current Leakage)
Switch 15 A (Breakers for wiring or Main Switch)
Indoor unit
Total operating current be less than 15 A
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
malfunction or fire.
9.2. Connecting a 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. 9.2.1] (P.5) MA Remote controller
[Fig. 9.2.2] (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
2
[AWG16]
Sheathed 2-core cable (unshielded)
2
[AWG22 to 16]
2
[AWG18 to 16])*
Sheathed 2-core cable (unshielded) CVV
2
[AWG22 to 16]
2
[AWG18 to 16])*
Main Cable : 0.41/22
Branch :
0.41/22
Ground :
0.41/22
Capacity : 15 Fuse : 15
: 15A
: 20A 30mA 0.1 sec. or less
•
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. 9.2.3] (P.5) MA Remote controller
[Fig. 9.2.4] (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.
9.3. Connecting electrical connections
Verify that the model name on the operating instructions on the cover of the con-
trol box is the same as the model name on the nameplate.
Step 1
Remove the screws holding the terminal box cover in place.
•
Type 15 - 54 (2 screws)
Fig.1
•
Type 72 · 96 (4 screws)
Fig.2
[Fig. 9.3.1] (P. 5)
Fig.1
Fig.2
Screws
Control box cover
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.
[Fig. 9.3.2] (P. 5)
To prevent external tensile force from applying to the wiring connection section
of power source terminal block use buffer bushing like PG connection or the
like.
Power source wiring
Use ordinary bushing
Caution:
Wire the power supply so that no tension is imparted. Otherwise, discon-
nection, heating or fire result.
9.4. Selecting the static pressure
Type 15 - 54
The external static pressure can be changed over as required. For the selection
of the static pressure, insert an attachment between the connector of the motor
lead wire and the control box.
The relationship between the attachment and the external static pressure is
shown below.
Attachment (Red) ...............External static pressure is higher pressure
Attachment (Blue) ..............External static pressure is lower pressure
Type 72 · 96
The external static pressure can be changed over as required.
For the selection of static pressure, replace the connector of the motor lead wire
by the connector (blue) inside the control box for insertion.
Upper Stage (TB15)
Lower Stage (TB5)
Terminal box cover
Control box
Tensile force
Transmission wiring
11
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