• Installation
2
• Systems • Installation
18
2 Field Wiring
2-2 Inverter cooling only / heat pump series
2-2-5 Example of performing cool/heat setting with cool/heat selector (heat pump unit only)
[Connection wire connecting procedures] ......Example of performing cool/heat setting of two or more outdoor units in block with cool/heat selector
(Heat pump unit only)
•For the wiring shown above, be sure to use 0.75-1.25mm
2
vinyl cords with sheath or cables (two-core).
• The wires shown above are all part to be procured in the field.
NOTES
1 Be sure to follow the limits below. If the unit-to-unit cables are beyond these limits, it may result in malfunction of transmission.
Max wiring length: 1000m
Total wiring length: 2000m
Max branches No. of branches: 16
2 Up to 16 branches are possible for unit-to-unit cabling. No branching is allowed after branching.
3 Never connect the power supply to the unit-to-unit cabling terminal block. Otherwise the entire system may break down.
A B C
Cool/Heat
selector
(Option)
Heat pump
unit only
(
)
Take care of the polarity
Use the conductor of
sheathed wire (2 wire)
(no polarity)
C/H Selector
To In/D unit To Out/D unit
Transmission wiring
Outdoor unit P.C. board (A1P)
Indoor unit Terminal board (Part to be procured in the field)
ABCF1F2F1F2
A1P
AABC
F1 F1 F2F2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F2
F1 F2 F1 F2
branch
Sub-branching
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