Installation and operation manual
6
FXFQ20~125M7V1B
VRV System air conditioners
4PW15109-1
2
Keep total current of crossover wiring between indoor units less
than 12 A. Branch the line outside the terminal board of the unit
in accordance with electrical equipment standards, when using
two power wiring of a gauge greater than 2 mm
2
(Ø1.6).
The branch must be sheathed in order to provide an equal or
greater degree of insulation as power supply wiring itself.
3
Do not connect wires of different gauge to the same grounding
terminal. Looseness in the connection may deteriorate the
protection.
4
Remote controller cords and wires connecting the units should
be located at least 50 mm away from power supply wiring. Not
following this guideline may result in malfunction due to electrical
noise.
5
For the remote controller wiring, refer to the "Installation manual
of the remote controller" supplied with the remote controller.
6
Never connect the power supply wiring to the terminal board for
transmission wiring. This mistake could damage the entire
system.
7
Use only specified wires and tightly connect wires to the
terminals. Be careful that wires do not place external stress on
the terminals. Keep wiring in neat order so that they do not
obstruct other equipment such as popping open the service
cover. Make sure the cover closes tight. Incomplete connections
could result in overheating, and in the worse case, electric shock
or fire.
W
IRING
EXAMPLE
■
Fit the power supply wiring of each unit with a switch and fuse as
shown in
figure 21
.
Complete system example (3 systems)
■
See figures
14
,
16
and
18
.
When using 1 remote controller for 1 indoor unit. (Normal
operation.)
(See figure 14)
.
For group control or use with 2 remote controllers
(See figure 16)
.
When including BS unit
(See figure 18)
.
Precautions
1.
A single switch can be used to supply power to units on the same
system. However, branch switches and branch circuit breakers must
be selected carefully.
2.
For a group control remote controller, choose the remote
controller that suits the indoor unit which has the most functions.
3.
Do not ground the equipment on gas pipes, water pipes,
lightning rods or crossground with telephones. Improper
grounding could result in electric shock.
F
IELD
SETTING
Field setting must be made from the remote controller in accordance
with the installation condition.
■
Setting can be made by changing the "Mode number", "FIRST
CODE No." and "SECOND CODE No.".
■
For setting and operation, refer to the "Field setting" in the
installation manual of the remote controller.
Setting ceiling height
■
Select the SECOND CODE No. that corresponds to the ceiling
height. (SECOND CODE No. is factory set to "01" for a ceiling
height of 2.7 m or less.)
The figure of ceiling height is for air discharge in 4 directions.
Setting air discharge direction
■
For changing air discharge direction (2 or 3 directions), refer to
the option handbook of the optional blocking pad kit. (SECOND
CODE No. is factory set to "01" for air discharge in 4 directions.)
Setting when installing high performance filters
■
In case of installing high performance filters, refer to the option
handbook of the high performance filters.
Setting air filter sign
■
Remote controllers are equipped with liquid crystal air filter signs
to display the time to clean the air filter.
■
Change the SECOND CODE No. Depending on the amount of
dirt or dust in the room. (SECOND CODE No. is factory set to
"01" for air filter contamination-light)
Air Filter contamination
■
When using wireless remote controllers it is necessary to use
address setting. Refer to the installation manual attached to the
wireless remote controller for the setting instructions.
1
Power supply
2
Main switch
3
Power supply wiring
4
Transmission wiring
5
Switch
6
Fuse
7
BS unit REYQ only
8
Indoor unit
9
Remote controller
1
Outdoor unit
2
Indoor unit
3
Remote controller (Optional accessories)
4
Most downstream indoor unit
5
For use with 2 remote controllers
6
BS unit
NOTE
It is not necessary to designate indoor unit address
when using group control. The address is automati-
cally set when the power is activated.
Ceiling height (m)
units 20~63
units 80~125
Mode n°
1st code n°
2nd code n°
<2.7
<3.2
N
13 (23)
0
01
>2.7 or <3.0
<3.2 or <3.6
H
13 (23)
0
02
>3.0 or <3.5
>3.6 or <4.2
S
13 (23)
0
03
Setting
Display interval
Mode n°
1st code n°
2nd code n°
Light
±2500 hrs
10 (20)
0
01
Heavy
±1250 hrs
10 (20)
0
02
