Electric Wiring Work; How To Connect Wirings And Wiring Example - Daikin FHA35AVEB99 Installation Manual

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. Insuffi-
cient capacity of the power supply circuit or improper electri-
cal 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 elec-
trical 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 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 cover.
• 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.
• If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons
in order to avoid a hazard.
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 2)
Table 2
Component
Transmission wiring
(NOTE 1.)
Remote controller wiring
(NOTE 2.)
* 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%.
NOTE NOTE NOTE NOTE
1. It shows the case when conduit piping are used. When the
conduit piping are not used, use H07RN-F (60245 IEC 66).
2. Sheathed vinyl cord or cable (insulation thickness: 1mm or
more)
11
Specification
4-core cable
1.5 mm²~2.5 mm²
and applicable for 220~240 V
H05RN-F (60245 IEC 57)
Vinyl cords with 0.75 to
1.25 mm² sheath or cables
(2-core wires)
Maximum 500 m*
H03VV-F (60227 IEC 52)
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. However, selection of
branch switch, branch overcurrent 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. (Refer to Fig. 30)
Insulation sleeve
Ring type crimp
style terminals
• 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.
Connection of 2 Connection of 2
wirings of same size wirings on one side
must be carried out is prohibited.
on both sides.
(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.
Terminal block for remote control-
ler and transmission wiring
Terminal block for power supply
Earth terminal
• 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.
Ring type crimp style terminals
Wiring
Fig. 30
Connection of
wirings of different
sizes is prohibited.
Tightening torque (N·m)
0.88 ± 0.08
1.47 ± 0.14
1.69 ± 0.25
Cup washer
Notched part
English