Gree U-MATCH B Series, Manual

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U-MATCH SERIES DC INVERTER AIR CONDITIONERS SERVICE MANUAL
29
Figure 2-5-1
5.2 Installation Position and Requirement
(1) Prohibit installing the wired controller at the misty place or the place with direct sunlight.
(2) Prohibit installing the wired controller at the place near high temperature objects or
water-splashing places.
(3) Prohibit installing the wired controller at the place where faces forward to the window, to avoid
interference of another remote controller from neighborhood.
(4) Cut off the power of heavy current wire in the installation hole of the wall. All power should be
cut off during installation.
(5) In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to
the following notes during connecting wires:
1) Make sure the tie-in interface of communication wire is correct, otherwise it may lead to
communication malfunction.
2) The signal wires and communication wires of wired controller should be separated from power
cord and connection wire between indoor unit and outdoor unit.
3) If the air conditioner is installed at the strong electromagnetic interference place, signal wire
and communication wire of wired controller must use shielding twisted wire.
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller‘s signal wire are as below:
(1) Choose suitable signal wire: 2-core signal wire (wire diameter
≥
0.75mm
2
(AWG18), wire
length
＜
50m (164ft) and the recommended length is 8m (26-1/4ft)).
(2) Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring
board for wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2: