DC Inverter Multi VRF System User Manual
17
4.7 Electric Wiring
4.7.1 Notices for Wiring
◆
Install units according to national wiring codes.
◆
Use air conditioner specialized power supply and make sure that it is consistent with system’s
rated voltage.
◆
Do not pull the power cord with force.
◆
All electrical installation must be performed by qualified technicians in accordance with local
laws, regulations and this user manual.
◆
Caliber of the power cord must be large enough. A damaged power cord or connection wire
must be replaced by specialized electrical cords.
◆
Connect the unit to specialized grounding device and make sure it is securely grounded. It’s
a must to install air switch and current circuit breaker that can cut off the power of the entire system.
The air switch should include magnetic trip function and thermal trip function so that system can be
protected from short circuit and overload.
◆
Grounding Requirements
1) Air conditioner belongs to class I electrical appliance, so it must be securely grounded.
2) The yellow-green wire inside the unit is a ground wire. Do not cut it off or secure it with tapping
screws, otherwise it will lead to electric shock.
3) Power supply must include secure grounding terminal. Do not connect the ground wire to the
following:
①
Water pipe
; ②
Gas pipe
; ③
Drain pipe
;
④
Other places that are deemed as not secure by professional technicians.
4.7.2 Wiring Diagram
1) Connection of power cord and communication wire
Separate power supply for Indoor and Outdoor
Outdoor
Indoor 1
Indoor 2
Indoor n
Power
Power
Power
Communication wire of IDU
Communication wire of IDU
Communication wire
between IDU and ODU
Power
Wired
controller
Wired
controller
Wired
controller
Wire
(resistance-matching)
Remote
monitor
D1
D2
G1
G2
D1
D2
H1
H2
D1
D2
H1
H2
D1
D2
H1
H2
Fig.23 Connection of power cord and communication wire for IDU and ODU
2) Selection of air switch and power cord
Model
Power supply
Air switch
capacity
Number of ground wire *
Min sectional area (mm
2
)
Number of power cord *
Min sectional area (mm
2
)
CHV-5S120NK
220-240V
～
50H
208-230V
～
60H
32
1×4.0
2×4.0
CHV-5S140NK
220-240V
～
50H
208-230V
～
60H
32
1×4.0
2×4.0
CHV-5S160NK
220-240V
～
50H
208-230V
～
60H
40
1×6.0
2×6.0
Note:
①
Selection of circuit breaker and power cord in the above table is based upon unit’s maximum
power (maximum current).
