34
① Flow direction of refrigerant leakage.
②
Room for refrigerant leakage. Since the concentration of refrigerant is greater than that of
air, pay attention to the spaces where the refrigerant may residue, for example, the basement.
4.5 Electric Wiring
4.5.1 Wiring precautions
(1) Wiring should conform to national rules. All the parts, materials, electric work should be in accordance
with local codes.
(2) Rated voltage and exclusive power supply should be used.
(3) Power cord should be fixed soundly and reliable. Never forcibly pull the power cord.
(4) Wire size of power cord should be large enough. The damaged power cord and connecting wire
should be replaced by exclusive cable.
(5) All the electrical work should be performed by professional personnel as per local law, regulation and
this manual.
(6) Connect the unit to the special earthing device and make sure the unit is earthed soundly.
(7) Air switch and circuit breaker is required to be set. Air switch should have both magnetic trip and
thermal trip functions so as to protect the unit when short-circuit and overload happens. D-type
breaker is adviced to be used.
(8) Wiring diagram attatched on the unit is prevailed.
4.5.2
Wiring of power cord
Every unit should have corresponding short-circuit and overload protection. And also a
main switch is required to control power supply or disconnection. See Fig.43.
Fig.43
Lennox
VRF Unit
