GMV5 DC INVERTER VRF UNITS SERVICE MANUAL 
11 
Electrical Parameters of High-static-pressure Air-duct-type Air Conditioner 
Circuit Breaker Capacity 
(A) 
Minimum Sectional Area 
(mm²) of Grounding Wire  
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
220-240V~50Hz/208-230V~60Hz 
 
  Note: 
(1) The circuit breaker and power cable specifications are selected based on the maximum power 
(maximum current) of the units. 
(2) The power cable specifications are obtained under the conditions that the ambient temperature is 
40℃, the working temperature of multi-core copper cable (for example, YJV cable) is 90℃, and the 
cable is exposed in cable troughs. In different applications, adjust the specifications based on national 
standards. 
(3) Only copper conductor cable can be used. 
(4) The sectional area of a wire is applicable for a distance range of up to 15 m. If the distance is greater 
than 15 m, increase the sectional area of the wire correspondingly to prevent the wire from being burned 
due to overload current and to avoid fire. 
(5) The circuit breaker specifications are obtained under the conditions that the ambient temperature is 
40℃  when the circuit breaker is working. In different applications, adjust the specifications based on the 
circuit breaker manual. 
(6) The circuit breaker must support magnetic release and thermal release at the same time to protect 
the system from short circuit and overload. 
Electrical Parameters of Fresh Air Conditioning IDU 
Power Supply 
Specification 
Circuit Breaker 
Capacity/A 
Minimum Sectional 
Area of Grounding 
Wire/mm
2
 
Minimum Sectional 
Area of Power 
Cable/mm
2
 
Notes: 
(1). The circuit breaker and power cable specifications in the above table are selected according to the