• Installation
2
•
Systems • Installation
22
2
Field Wiring
2-3
Heat recovery series
2-3-4
Gist of field line connection
NOTES
1
Be sure to keep the power supply wiring away from the transmission wiring.
2
No sagging of transmission line as shown in the figure 6 by always clamping them together.
3
No contact of line with refrigerant piping.
2-3-5
Example of transmission line connection
•
Connect the output terminal F1 and F2 of the terminal block (X1M) on the PC board of outdoor unit with the input terminal F1 and F2 of the first
BS unit A. (See the figure 3.)
•
In case of the indoor unit connect as the cool-only unit, it wire the terminal
of the last BS unit.
NOTES
1
Be sure to follow 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.
•
Never connect the power supply to the unit-to-unit cabling terminal
block. Otherwise the entire system may break down.
Power supply
3N ~50Hz
380 ~415V
(See the figure 4.)
(See the figure 6.)
(See the figure 5.)
Clamp the anchor
No polarity
Use the conductor of sheated wire (2 wire)
Electric parts box (left)
Electric parts
box (right)
To BS unit of
indoor unit
Electric parts box of
outdoor unit (right)
Electric parts box of
outdoor unit (left)
Earth terminal
Clamp the
anchor
Figure 4
Figure 6
Figure 3
Figure 5
Flat washer
Grounding
screw
Spring washer
Shielded portion
C cup washer
Clamp material
Transmission line
Electric parts box of
outdoor unit (right)
A3P
To
IN/D
IN/D
IN/D
IN/D
OUT/D.BS
OUT/D.BS
OUT/D.BS
BS
UNIT
To
OUT/D UNIT
Connecting line
BS unit A
BS unit B
Indoor unit
Last BS unit
Cool-only unit
Remote
control
Remote
control
Remote
control
Remote
control
Remote
control
F1
F2
OUT/D,BS
Branch
Sub-
branching
