Ultra Heat GMV Multi VRF_Heat Recovery Serial
28
(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 advised to be used.
(8) Wiring diagram attached on the unit is prevailed.
4.6.2 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.
Fig.33
Outdoor Unit:
Maximum Overcurrent
Protection
(1) Specification of circuit breaker and power cord is selected on the basis of unit’s maximum power (max. current).
(2) Specification of power cord is based on the working condition where ambient temperature is 40 ºC (104℉) and
multi-core cable with copper conductor(working temperature is 90 ºC (194℉), e.g. power cable with YJV cross-linked
copper, insulated PE and PVC sheath) is lying on the surface of slot. If working condition is different, please adjust the
specification according to national standard.
(3) Copper-core cable must be used.
(4) The above sectional area is suitable for a maximum distance of 15m (49-1/5feet). If it’s over 15m (49-1/5feet),
sectional area must be expanded to prevent overload current from burning the wire or causing fire hazard.
(5) Specification of circuit breaker is based on the working condition where the ambient temperature of circuit breaker is
40ºC(104℉). If working condition is different, please adjust the specification according to national standard.
(6) The air switch should include magnetic trip function and thermal trip function so that system can be protected from
short circuit and overload.
To Next Page
Loading...
Need help?
General
