Gree R410A, Service Manual

Page: 119 / 217

Super Free Match
Service Manual
INSTALLATION 115
7.2 Requirements of Power Circuit and Cable
Phase and frequency 3Ph,50Hz
Voltage 380 ～ 415V
GWHD(48S)NM3CO Recommended cable of outdoor unit
(Pieces × Sectional area)
GWHD(56S)NM3CO
5×2.5mm
2
Recommended cable of BU module (Pieces × Sectional area) 3×0.75 mm
2
Transmission line (Pieces × Sectional area) 2×1.5 mm
2
Recommended cable of indoor unit (Pieces × Sectional area) 4×0.75mm
2
GWHD(48S)NM3CO 25 A
GWHD(56S)NM3CO 25A
Capacity of the air switch
BU module 10A
Note:
‹ The total length of the transmission line between the outdoor unit and the furthest BU module is not more
than 55m. Otherwise, the system cannot work possibility.
‹ The specifications of the power cable and transmission line listed in the table above are determined based
on the maximum power (maximum amps) of the unit.
‹ The specifications of the power cable listed in the table above are applied to the conduit-guarded
multi-wire copper cable (like, YJV copper cable, consisting of PE insulated wires and a PVC cable jacket)
used at 40 and resistible to 90
℃ ℃
, and shall be at least those of ordinary polychloroprene sheathed cords
(code designation 60245 IEC 57). If the working condition changes, they should be modified according to
the related national standard.
‹ The specifications of the air switch listed in the table above are applied to the breaker with the working
temperature at 40 . If the working condition changes, they should be modified according to the related
℃
national standard.
‹ The length of the recommended power cable should be less than 15 meters; otherwise, the diameter of the
power cable is not enough.
‹ Mentioned power cable and transmission line length is just a reference value. It may be different
depending on the condition of installation, humidity or materials, etc.
‹ An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be
connected in fixed wiring.
7.3 Ground Requirements
‹ The air conditioner is classified into the Class I appliances, so its ground ways must be reliable.
‹ The ground wire must be fixed on the screw hole with the sign as the right figure.
‹ The yellow-green wire of the air conditioner is the ground wire and must be fixed by the tapping screw.
And it cannot be used for other purpose or cut off. Otherwise, it will cause the hazard of electric shock.
‹ The reliable ground terminal should be provided and the ground wire cannot be connected to any of the
following places: a. Water pipe ; b. Coal gas pipe; c. Sewage pipe; d. Lightning rod e. Telephone line f.
Other unreliable places considered by a professional.
7.4 Precautions of Electrical Wiring Work
‹ The ground connection should be reliable and the ground wire should be connected to the dedicated
device of the building by the professional.