C&H N Series Owner's Manual page 39

N Series Floor Ceiling Type Unit
Adopt 2pc of 0.75mm² po wer c ords t o b e t he c ommunication c ords
⑥
between indoor and outdoor units. The maximum length is 100m. Please
select a pr oper l ength according t o l ocal c onditions. C ommunication
cords m ust not be t wisted t ogether. T o be i n c ompliance I SO5151, i t i s
necessary to use 8 meters long wire.
Adopt 2pc of 0.75mm² po wer c ords t o b e t he c ommunication c ords
⑦
between wired c ontrol and i ndoor uni t. The m aximum l ength i s 30m .
Please select
Communication cords must not be twisted together. To be in compliance
ISO5151, it is necessary to use 8 meters long wire.
The wire gauge of communication cord should not be less than 0.75mm².
⑧
It's recommended to use 0.75mm² power cords as the communication
cords.
Calculation of the maximum permissible system impedance：
⑨
a) To be i n c ompliance with E N 61 000-3-11, i mpedance v alue of
power-supply system c onnected t o pr oduct m ust be l ess t han or
equal to the allowable maximum value of |Z
Models
CH-U050NK
CH-U071NK
CH-U085NK
CH-U100NM
CH-U125NM
CH-U140NM
CH-U160NM
b) Before c onnecting t he pr oduct t o publ ic power net work, pl ease
consult your l ocal po wer s upply aut hority t o ens ure t hat t he p ower
network h as met t he abov e r equirements. N o r equirement f or t he
unlisted product's impedance value of power-supply system.
a proper length according to local
34
| in the following sheet:
sys
Max |Z | unit:ohms
sys
0.170
0.090
0.071
0.416
0.142
0.173
0.193
conditions.