Specifications

59
(2) The transmitting specification for “A” control
1Wiring regulations
Cross section
of cable
Round
2.5
2.5
1.5
2.5
3
3
4
4
(50)
✽2
(45)
✽3
60
✽4
Not
applicable
✽5
Flat
✽1 : Power supply cords of appliances shall not be lighter than design 245 IEC or 227 IEC.
✽2 : In case that cable with stripe of yellow and green is available.
✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm
2
.
✽4 : In case of regular polarity connection (S1-S2-S3).
✽5 : In the flat cables are connected as this picture, they can be used up to 80m.
✽6 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, Humidity or materials, etc.
Flat
Round
Wire size
(mm
2
)
Number
of wires
Clockwise : S1-S2-S3
w Pay attention to stripe of yellow and green
Clockwise : S1-S2-S3-Open
w Connect S1 and S3 to the opposite angle
Not applicable
(Because center wire has no cover finish)
From left to right : S1-Open-S2-S3
Polarity
L(m)
✽6
(3C Flat cable ✕ 2)
S1 S2 S3
Section Communications from remote controllers Communications between indoor and outdoor units
The maximum length of
total wiring
500m 80m (50m for the wirings between indoor and
outdoor units; 30m for the wirings among indoor
units)
The maximum numbers
for connection
One remote controller can connect and operate
up to 16 indoor units by grouping them.
❋
1
One group can connect up to two remote con-
trollers.
❋
2
❋1 Remote controller considers multiplex units as
a single group.
❋2 PSA-JGA should be excluded.
One outdoor unit can connect up to four indoor
units.
The cables applicable 0.3mm
2
to 1.25mm
2
Use either VVF flat-type cable (3 cores:
{1.6mm or more) or wires in the table below.
❋3 The diameter of the cables depends on
each unit.
Others The wirings as follows are not allowed:
• The wiring that the indoor units of the same
refrigerant system are connected through TB5.
• The wiring which directly connects the terminals
for remote controllers.
The core wire connected to terminal S2 shall be
placed at the center of VVF flat-type cable.
Section Communications from remote controllers Communications between indoor and outdoor units
Transmitting speed 83.3 bit/sec. (1 bit = 12ms) 83.3 bit/sec. (1 bit = 12ms)
Normal transmission The terminal for remote controller transmits sig-
nals every 7.5 seconds; the indoor unit whose
refrigerant address is “0” responds them.
Outdoor unit transmits signals every 3 seconds;
all the connected indoor units respond them.
Modulation The waveform modulates at 50kHz. There is no modulation.
Detection of abnormal
communication
When transmitting error is detected for three con-
secutive minutes.
When transmitting error is detected for three
consecutive minute.
2Transmitting specification
WIRING SPECIFICATIONS FOR 220~240V 50Hz
(INDOOR-OUTDOOR CONNECTING CABLE)
PU(H)-P1.6VGA~P6YGA
PU(H)-P1VGAA.UK~P6YGAA(.UK)
(Except PUH-8YE,PUH-10YE)
OCT03-E-2.qxp 04.3.26 1:48 PM Page 59