Installation manual

English 18
8. ELECTRIC WIRING WORK
8-1 GENERAL INSTRUCTIONS
• Make certain that all electric wiring work is carried out by qualified personnel according to the applicable
legislation and this installation manual, using a separate circuit. Insufficient capacity of the power supply cir-
cuit or improper electrical construction may lead to electric shocks or a fire.
• Make sure to install an earth leakage breaker in accordance with applicable legislation. Failure to do so may
cause electrical shock and a fire.
• Do not turn on the power supply (of the indoor unit) until all the installation work is completed.
• Make sure to earth the air conditioner.
Earthing resistance should be according to applicable legislation.
• Do not connect the earth wiring to gas or water piping, lightning 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
lightning bolt.
• For electric wiring work, refer to also the “WIRING DIAGRAM” 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 WIRING 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. How-
ever, 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 insulation.
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
01_EN_3P249378-6L.fm Page 18 Sunday, September 30, 2012 2:30 PM