GMV DC Inverter VRF
37
Circuit
breaker
capacity
(A)
Circuit breaker
capacity for
combined units
(A
)
Wire size of
power supply
(mm
2
)
Wire size of combined
uni (mm
2
)
Note:
① “280+400”: indicates the combination of GMV-280WM/E-X and GMV-400WM/E-X unit.
② Due to the same capacity, GMV-280WM/E1-X model and GMV-280WM/E-X model can
replace each other for operation, GMV-450WM/E1-X model and GMV-450WM/E-X
model can replace each other for operation.
③ Specification of circuit breaker and power cord is selected on the basis of unit’s
maximum power (max. current).
④ Specification of power cord is based on the working condition where ambient
temperature is 40
℃
and multi-core copper cable (working temperature is 90
℃
) is
lying on the surface of slot (IEC 60245). If working condition changes, please adjust
the specification according to standard IEC 60245. Power cord used for outdoor unit
should not be below standard 60245 IEC57.
⑤ Copper-core cable must be used.
⑥ The above sectional area is suitable for a maximum distance of 15m. If it’s over 15m,
sectional area must be expanded to prevent overload current from burning the wire or
causing fire hazard.
⑦ Specification of circuit breaker is based on the working condition where the ambient
temperature of circuit breaker is 40
℃
. If working condition is different, please adjust
the specification according to national standard.
⑧ The circuit breaker should include magnetic trip function and thermal trip function so
that system can be protected from short circuit and overload.
⑨ An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring
4.5.3 Connection of power cord
Warning: before obtaining access to terminals, all supply circuits must be disconnected.
Note:
(1) If units are type I electrical appliances, they must be reliably grounded.
(2) Ground resistance must be in accord with requirements of local standard.
(3) The green-yellow wire within units are ground wire. Do not use it for other purposes.
Nor should it be cut off or secured by tapping screws. Otherwise, it may cause electric
shock.
(4) Power supply at user side must have reliable ground terminal. Do not connect ground
wire to the following places:
1) Water pipe, 2) Gas pipe, 3) Drainage pipe, 4) Other places that are considered by
professionals as unreliable.
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