Electrical Control Wiring; Concealed Type Indoor Unit; Precautions; Wired Controller - Trane MWD507 Installation & Operation Manual

Electrical control wiring

Concealed type indoor unit

1.
2.
3.
4.

Precautions:

1.
2.
3.
4.
5.

Wired controller

1.
AMS-SVX04A-EN
Remove the electrical control box lid of the concealed type indoor unit, pull wires inside through
incoming hole at the side of the control box, and connect live wire L to terminal 1, neutral line N
to terminal 2, earthing wire to copper earthing screw. Be sure to wire properly according to the
unit wiring diagram, and ensure fi rm connection.
Pull communication lines from other indoor unit or outdoor unit inside through the incoming hole
at the side, and connect to CN4/CN5 terminals of the controller based on following relation:
RS485 wire sequence
CN4/CN5 terminal
When matching the wired controller, pull communication line from the wired controller inside
through the incoming hole at the side of the control box, and connect to CN3 terminal of the
controller.
After fi nishing the above wiring, close the junction box lid.
All wiring should comply with the local laws and regulations;
It is suggested that power line ≥ 1.5 mm
specifi cation for power line should be improved accordingly;
It is suggested that conductors provided by Trane factory is used for the communication lines of
the indoor and outdoor units. The shield twisted pair is 0.5 ~ 1.25 mm
cm;
Control signal has A and B polarities. Connection of different polarities is prohibited (A and B may
not be connected);
While the power line is laid in parallel with the communication line, a certain distance must be
retained.
Supporting rack of the wired controller base plate is shown in following fi gure. When being
installed, the base plate must be fl ush with the wall surface.
A B Shielding layer
A B G
2
. If electric heater is provided for the unit, the
2
, twist pitch is less than 10
19