Field Minimum Wire Sizes For Power Source - Hitachi airCore 700 Operation Installation Maintenance Manual

7. Electrical Wiring
NOTE:
•
The ring core needs to be installed on the transmission cable between the fixed wire clamp and
TB2, where additional insulation rubber is peeled off.
[Procedure]
Insert the transmission cable into the ring core
as shown in the right figure before connecting
to the terminal board. Fix the cable and the
ring core by using the band (accessory) in the
electrical box.

7.3 Field Minimum Wire Sizes for Power Source

(1) Use an ELB (Electric Leakage Breaker). If not used, it will cause an electric shock or a fire.
(2) Do not operate the system until all the check points have been cleared.
(a) Check to ensure that the electrical resistance is more than 1 megohm, 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) Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the system.
(c) Check to ensure that the switch on the main power source has been ON for more than 12 hours, to
warm the compressor oil by the crankcase heater.
(3) Pay attention to the following items while the system is running.
(a) Do not touch any of the parts by hand at the discharge gas side, since the compressor chamber
and the pipes at the discharge side are heated higher than 90
(b) DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH(ES). It will cause a serious accident.
Model Power Source
PPIH-3.0UFA1NQ
PPIH-4.0UFA1NQ
PPIH-5.0UFA1NQ 220-240V~50Hz
PPIH-6.0UFA1NQ
PPIH-6.5UFA1NQ
NOTES:
•
Follow local codes and regulations when selecting field wires.
•
The wire sizes marked with *1 in the table are selected at the maximum current of the unit according to
the European Standard, IEC 60335-1. Use the wires which are not lighter than the ordinary tough rubber
sheathed flexible cord (code designation H05RR-F) or ordinary polychloroprene sheathed flexible cord
(code designation H05RN-F) when get power from outside.
•
The wire sizes marked with *2 in the table are selected at the maximum current of the unit according to
the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan.
•
Use a shielded cable for the transmitting circuit and connect it to ground.
•
In the case that power cables are connected in series, add each unit maximum current and select
wires below.
Selection According to IEC 60335-1
Current i (A)
i ≤ 6
6 < i ≤10
10 < i ≤16
16 < i≤ 25
25 < i ≤ 32
32 < i ≤ 40
40 < i ≤ 63
63 < i
*3: In the case that current exceeds 63A, do not connect cables in series.
Maximum
Current(A)
IEC 60335-1 *1
3.81
5.11
5.04
5.37
6.26
Selection According to MLFC (at Cable Temperature of 60
2
Wire Size (mm )
2.5
2.5
2.5
4
6
10
16
*3
TB2
B A 2 1
RCS Transmission
.
o
C
Power Source Cable Size
MLFC *2
2 2
2.5mm 2.5mm
Current i (A)
2.5 < i ≤ 6
6 < i ≤ 10
10 < i ≤ 16
16 < i ≤ 25
25 < i ≤ 32
32 < i ≤ 40
40 < i ≤ 63
-17-
Transmission Cable Ring Core
Transmitting Cable Size
IEC 60335-1 *1 MLFC *2
2
0.75mm 0.75mm
o
C)
2
Wire Size (mm )
2.5
2.5
2.5
4
6
10
16
Band
2