12
GD CHIGO HEATING & VENTILATION EQUIPMENT CO., LTD.
Full DC Inverter CHV System - Control System
b)
Case 2:
Note:
⚫
Select power wire for these five models separately according to relevant standard.
⚫
The wiring diameter and the length in the table indicate the condition that the voltage dropping range is within 2%. If
the length exceeds the above figure, please select the wire diameter according to relevant standard.
3)
Power wire selection
Power wiring includes the
main wire
(a)
connecting to branch box and the
wire (b)
between branch box and power facilities.
Please select the wire diameter according to the following requirement.
a)
Diameter of
main
wire (a)
: depends on the total horse power (HP) of outdoor unit (See (5)).
Example:
In system: 8HP×1 unit+8HP×1 unit+10HP×1 unit
So totally 26HP →
See (5)
→ size of wire is 25mm
2
(within 20m)
b)
Diameter of wire (b): depends on the number of combined outdoor unit.
If outdoor unit quantity ≤ 5, the
wire (b)
diameter selection is same as
main wire (a)
selection (See (5)).
Outdoor unit
power supply
Leakage
protector
Manual
switch
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
GND
GND
GND
GND
Branch box
Leakage
protector
M anual
switch
380-415V 3N~ 50Hz
(
a
)
Leakage
protector
Manual
switch
GND
Branch box
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
GND
Outdoor unit
(b)
(a)
Power facilities 1
(with leakage protector)
Power facilities 2
(with leakage protector)