Carrier 40VMH024 - Page 17

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3. Use a suitable screwdriver to fix the communication wire
on the outdoor unit communication terminal as shown in
Fig. 27
.
Fig. 27 —Connecting Communication Wire to
Outdoor Unit Communication Terminal
If communication wires are use to connect indoor units, find
the corresponding port and plug it directly. See Fig. 28.
Fig. 28 —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.
29. See Fig. 30 and 31 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. Pay attention to the
polarity of the communication wire.
Fig. 29 —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.
Connector in accessory kitConnector on indoor unit Communication cable
in field