11 English
• Make sure to earth the air conditioner.
Earthing resistance should be according to applicable legis-
lation.
• Do not connect the earth wiring to gas or water piping, light-
ning conductor or telephone earth wiring.
• Gas piping ............Ignition or explosion may occur if the
gas leaks.
• Water piping .........Hard vinyl tubes are not effective
earths.
• Lightning conductor or telephone earth wiring..................
Electric potential may rise abnormally if struck by a light-
ning bolt.
• For electric wiring work, refer to also the “WIRING DIA-
GRAM” attached to the control box lid.
• Never connect the power supply wiring to the terminal block
for remote controller wiring, or otherwise the entire system
may be damaged.
• Carry out installation and wiring of the remote controller
according to the “installation manual” attached to the remote
controller.
• Do not touch the Printed Circuit Board assy during the wiring
work. Otherwise, it may cause damage.
8-2 SPECIFICATIONS FOR FIELD WIRING
For the wiring of outdoor units, refer to the installation manual
attached to the outdoor units.
• Remote controller and transmission wiring are field supply.
(Refer to Table 3)
Table 3
* This will be the total extended length in the system when
doing group control.
Wiring specifications are shown on the condition that the wiring
has a voltage drop of 2%.
1.It shows the case when conduit piping are used. When the
conduit piping are not used, use H07RN-F.
2.Sheathed vinyl cord or cable (insulation thickness: 1mm or
more)
9. HOW TO CONNECT WIRINGS AND WIR-
ING EXAMPLE
Wiring connection method
Caution for wiring
• The indoor units in the same system can be connected to the
power supply from one branch switch. However, selection of
branch switch, branch over current circuit breaker and wiring
size must be according to applicable legislation.
• For connection to the terminal block, use ring type crimp style
terminals with insulation sleeve or treat the wiring with insu-
lation.
• If the above is not available, make sure to observe the follow-
ing items.
• 2 wirings of different sizes to the terminal block for power
supply is prohibited.
(Abnormal heating may occur if the wirings are not tightened
securely.)
• Use the required wirings, connect them securely and fix
these wirings so that external force may not apply to the ter-
minals.
• Use a proper screw driver for tightening the terminal screws.
If an improper screw driver is used, it may damage the screw
head and a proper tightening cannot be carried out.
• If a terminal is over tightened, it may be damaged. Refer to
the table shown below for tightening torque of terminals.
• Conduct wiring so that the earth lead comes out from the
notched part of the cup washer. (Otherwise, earth lead con-
tact will be insufficient and grounding effect may be lost.)
• Do not carry out soldering finish when stranded wirings are
used.
9-1 CONNECTION OF TRANSMISSION WIRING,
EARTH WIRING AND FOR THE REMOTE CON-
TROLLER WIRING
(1) Loosen the fixing screws (2 pcs.) while holding the control
box lid, and then remove the control box lid.
(2) Cut off the knockout hole and put the resin bushing (10)
(accessory) on the back side (sheet metal).
(3) Connect the transmission wiring through the resin bushing
(10) accessory to the terminal block (X2M: 3P) while match-
ing up the numbers (1 to 3), and then connect the earth wir-
ing to the earth terminal.
After this is done, use the wiring fixture (11) and clamp (4)
attached to bind the wiring without applying tension to the
connecting section of the wirings.
Wire
Size (mm
2
)
Length
Transmission wiring
H05VV-U4G
(NOTE 1)
2.5 –
Remote controller
wiring
Vinyl cord with
sheath or cable
(2 wire) (NOTE 2)
0.75 - 1.25
Max.
500m*
Insulation sleeve
Ring type crimp
style terminals
Wiring
Tightening torque (N·m)
Terminal block for remote controller
and transmission wiring
0.88 ± 0.08
Terminal block for power supply 1.47 ± 0.14
Earth terminal 1.69 ± 0.25
Connection of 2
wirings of same size
must be carried out
on both sides.
Connection of
wirings of different
sizes is prohibited.
Connection of 2
wirings on one side
is prohibited.
Notched part
Ring type crimp style terminals
Cup washer
01_EN_3P368557-1.fm Page 11 Wednesday, December 10, 2014 10:31 AM
To Next Page
Loading...
Need help?
General
