Carrier SYSTXCCITW01 Instruction Manual Page 18

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10
S Adjust length and routing of each wire to reach each wire entry on the
connector backplate. Strip 1/4--in (6.4 mm) of insulation from each wire.
S Match and connect thermostat wires to proper terminals on control backplate.
d See wiring diagrams in Appendix A.
S Push any excess wire into the wall. Seal hole in wall to prevent any air leaks.
Leaks can affect operation.
S Attach Infinity Control to the mounting plastic by lining up the plastic guides
on the back of the control with the opening on the mounting plastic and push
on.
S Perform installation of all other system equipment (i.e. dampers, humidifier,
ventilator, UV lights, etc.).
S Turn on power to equipment.
4.4.1. Shielded Wire
If the thermostat wiring will be located near or in parallel with high voltage wiring,
radio, TV or Ethernet wiring, then four conductor, twisted --pair, shielded cable can
be used to reduce or eliminate potential interference. The shield wire should be
connected to the C terminal, or ground, at the indoor unit. The shield wire should
NOT be connected to any terminal at the user interface. Connecting the shield to
ground at both ends can cause current loops in the shield, reducing shield
effectiveness.
Connect one pair of the two--pair (minimum) cable to the A and B communication
terminals, and another pair to the C and D terminals at both ends of the cable. The
shield wire should ONLY be connected at the indoor equipment ground or C
terminal. Note that some outdoor units only require the A and B connections. See
the outdoor unit installation instructions for more information.
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