Carrier XCT 7 40VA010T7FAQEE Manual Del Propietario Y De Instalación página 21

Electrical wiring
Round. Press the terminal
1) The power terminal block should not be crimped with 2 wires of different diameters. Otherwise, poor crimp
connection will occur and that can lead to abnormal heating or sparking of the line.
2) Refer to the figure below for crimping wires of same diameter.
Connect wires with the same
diameter on both the sides
(5) Tighten the terminal screws using the right screw driver. A screw driver of small dimension will damage the
screw head and fail to tighten it properly.
(6) If terminal screws are tightened excessively, they could get damaged. Refer to the following table for
tightening torques of terminal screws:
Dimension of terminal screw
M3.5 (terminal block for communication line)
M4 (terminal block for power line)
M4 (terminal block for ground wire)
(7) It is forbidden to connect the power line to the communication terminal block because it will damage the
circuit control board.
(8) Wiring of the communication lines should be within the following scope. Exceeding the limit will possibly
lead to abnormal communication:
1) The maximum wiring length between the outdoor machine and the valve cage, the valve cage and the indoor
machine, and between the valve cages should be 1000 m at most. The total wiring length should be 1000m at
most.
2) The maximum wiring length between the valve cage and the wire controller for switching working modes
should be 500 m at the most.
Insulating sleeve
It's forbidden to connect two
wires on one side
Tightening torque (N.m)
19
Wire
Wires of different diameters
are not allowed
0.80~0.96
1.18~1.44
1.52~1.86