15
OPTION/EXTENSIONS OF COMMUNICATION WIRING
To extend control wiring or make terminal connections, use the
PQE connection wire supplied in the accessory kit and follow
these steps.
1. Cut the connector on the outdoor unit side as shown in
Fig. 22 —Shearing Outdoor Connector
2. Strip a suitable length of the insulation layer as shown in
Fig. 23 —Stripping the Wire
3. Use a suitable screwdriver to attach the communication
wire on the outdoor unit communication terminal as
shown in Fig. 24.
If communication wires are use to connect indoor units, find
corresponding port and plug it in directly as shown in Fig. 25.
Fig. 25 —Connecting the Communication Wires
If it is not possible to buy communication wires from Carrier,
connect the indoor unit side of the communication wires using
the connector provided with the accessories as shown in Fig.
26. See Fig. 27 and 28 for typical communication wiring of the
heat pump and heat recovery systems.
IMPORTANT: Wiring for communication shall be two
inches or more apart from power source wiring to avoid
electric noise. Do not insert control/communication and
power source wire in the same conduit. Make sure the
polarity of the communication wire is correct.
Fig. 26 —Connecting the Communication Cable to Indoor Unit Using the Supplied Connector
CAUTION
Failure to follow these procedures may result in personal
injury or damage to equipment.
NEVER CONNECT the main power source to the control
or communication terminal block.
USE AN APPROPRIATE SCREWDRIVER for
tightening the terminal screws. Do not over tighten the
terminal screws.
Fig. 24 —Connecting Communication Wire to
Outdoor Unit Communication Terminal