8
Electrical installation
!
WARNING
• Use an ELB (Electric Leakage Breaker). If not used, it may cause an electric shock or a fire.
•
Do not operate the system until all the check points have been cleared.
a
Ensure that the insulation resistance is more than 2MΩ, by measuring the resistance between ground and the terminal of the
electrical parts. If not, do not operate the system until the electrical leakage is found and repaired.
b Ensure that the stop valves of the outdoor unit are fully opened and then start the system.
Model Capacity
Transmission cable size
EN60335-1
3.0/3.5/4.0/5.0/6.0/6.5HP
4x1.5mm
2
NOTES:
1
Follow local codes and regulations when selecting field wires, and all the above are the minimum size.
2
The wire sizes marked in the table are selected at the maximum current of the unit according to the European Standard,
EN60335-1. Use the wires which are not lighter than the ordinary polychloroprene sheathed flexible cord (code designation
H07RN-F).
When connecting the terminal block with flexible cord, make
sure to use the round crimp-style terminal for connection to the
power supply terminal block.
Place the round crimp-style terminals on the wires up to the
covered part and secure in place.
When connecting the terminal block with a single core wire, be
sure to perform curing.
Round crimp-style terminal
Flexible cord
Covered part
Terminal
Single core wire
3
When transmission cable length is more than 15 meters, a larger wire size should be selected.
4
Use a shielded cable for the transmitting circuit and connect it to ground.
5 If power cables are connected in series, add each unit maximum current and select wires below.
Selection According to EN60335-1
Current i (A)
Wire Size (mm
2
)
i≤6
0.75
6<i≤10
1
10<i≤16
1.5
16<i≤25
2.5
25<i≤32
4
32<i≤40
6
40<i≤63
10
63<i
*
*If current exceeds 63A, do not connect cables in series.
9 Test Run
Please perform test run according to installation manual of outdoor unit.
INSTALLATION AND MAINTENANCE
HO2019291HA
20