[China State Grid original] Many people do not understand home central air conditioning, so just buy back a good looking product, make an appointment to install the installation. However, there are always some minor problems in the later use, because people may have overlooked a small problem during installation. This is one of the most overlooked problems when installing a central air conditioner in a home, that is, the choice of signal lines.
The signal line of a home central air conditioner generally has to be shielded, but in many cases the shield is replaced by a normal power cord.
Let's first take a look at what the signal line is used for.
The signal line of the home central air conditioner is generally used as a signal connection line of the wired controller, including a link indoor control unit and an outdoor unit.
What does the shield line look like?
Generally speaking, we slightly open a little from the cross section of the line. If there is a layer of mesh shielding layer in the plastic layer wrapped in the outermost layer, it is a standard shielding line; if there is no mesh shielding layer, it is very Unfortunately, this line refers to the ordinary power cord.
Why is the signal line of the home central air conditioner not to be shielded?
First of all, because there are more and more electrical appliances in the home environment, the corresponding electromagnetic radiation is increasing. Too much electromagnetic radiation may affect the controller between the indoor unit and the outdoor unit of the central air conditioner, causing the controller to malfunction and affecting signal transmission.
In addition, because many users do not understand the central air conditioner in the home, it is impossible to determine which phenomena are machine faults and which phenomena are disturbed, which causes a lot of unnecessary troubles during use.
In view of the above two points, the signal line of the general household central air conditioner must use a shielded wire. Therefore, we must pay attention to the purchase and installation, because the cost of the shielded wire is relatively high, in order to prevent someone from shoddy, we can not be the shopkeeper when installing, or to be properly supervised.
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