English
13
NOTES
•
The above Table 3 of Electrical Characteristics refers to one BS unit.
•
See the Engineering data book for other details.
7-4 WIRING EXAMPLE
•
Here is shown a wiring example for one system transmission wiring.
•
Connect terminals F1 and F2 (TO IN/D UNIT) on the control PCB (A1P) in the outdoor unit EL. COMPO.
BOX and terminals F1 and F2 (TO OUT/D UNIT) of the control PCB (A1P) of the first BS unit A.
NOTES
1.
Connect cooling-dedicated air conditioners to terminals F1 and F2 (TO OUT/D UNIT) of the final BS unit.
2.
Use 2-core wire for the transmission wiring. Using a multi-core wire with 3 or more cores when two or more
indoor units are used at once could cause abnormal stoppage. (Only use 3-core wire in the COOL/HEAT
SELECTOR.)
3.
Absolutely do not connect the power supply wiring to the transmission wiring terminal block. Doing so
could damage the entire system.
4.
For the transmission wiring, use wire that is within the following ranges. Exceeding these limits could
cause a transmission error.
(1)
Between an outdoor unit and BS unit,
Between a BS unit and indoor unit, and
Between a BS unit and BS unit
Maximum wiring length: 1000m or less
Total wiring length: 2000 or less
Branch point max: 16 branch points
(2)
Between a BS unit and COOL/HEAT SELECTOR
Maximum wiring length: 500m or less
7-5 WIRING CONNECTIONS
Remove the EL. COMPO. BOX lid on the side and follow the directions to connect the wires.
〈
Transmission wiring
〉
Remove the EL. COMPO. BOX lid and connect the wires to F1 and F2 (TO IN/D UNIT) and F1 and F2 (TO
OUT/D UNIT) transmission wiring terminals (control PCB (A1P)).
At this time, pass the wiring into the unit through the wiring through hole (left) and use the included clamps 2)
to securely hold the wires (in 2 places).
〈
Power supply wiring and ground wire
〉
Remove the EL. COMPO. BOX lid and connect the power supply wiring to
the power terminal block (X1M).
Also connect the ground wire to the ground wire terminal. Pass both the
power supply wire and the ground wire together through the wire through
hole (right) and into the EL. COMPO. BOX and use the included clamps 2) to
securely hold the wires (in 2 places).
Be sure to wire the ground wire so that comes out of the slit in the cup washer.
(Not doing so could cause insufficient ground wire contact and causing the wire not to function as a ground.)
F1 F2
F1
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F2 F1 F2
F1 F2
F1 F2 F1 F2
F1 F2 F1 F2
A
A
B C
A
B C
A
B C
B
C
A
B
C
A
B
C
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(2)
(2)
(2)
Absolutely do not
connect the power
supply wiring.
Transmission wiring
Use 2-core wires.
(There is no polarity.)
COOL/HEAT SELECTOR wiring
Use 3-core wires. (There is polarity.
Match the terminal numbers.)
Cooling/Heating selectable indoor unit
Cooling-dedicated
indoor unit
Outdoor unit
BS unit A
BS unit B
Final BS unit
C/H SELECTOR
COOL/HEAT
SELECTOR
COOL/HEAT
SELECTOR
COOL/HEAT
SELECTOR
C/H SELECTOR
C/H SELECTOR
TO IN/D UNIT TO OUT/D UNIT
TO IN/D UNIT TO OUT/D UNIT
TO IN/D UNIT TO OUT/D UNIT
TO IN/D UNIT TO OUT/D UNIT
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
branch
Sub-branching
Cut out section
Cup washer
Ring-type crimp
style terminal
01_EN_3P194121-1E.fm Page 13 Thursday, September 4, 2008 5:33 PM
