Step 6 - Position And Connect Controller - Carrier 40VMW005 Installation And Maintenance Instructions Manual

Step 6 — Position and Connect Controller
NOTE: Controllers are ordered separately.
Wired controllers should be installed in a position that
maintains good temperature control:
• Position the thermostat approximately 48 inches above
floor level.
• Do not position thermostat where it can be directly
affected by the unit's discharge airstream.
• Avoid external walls and drafts from window and doors.
• Avoid positioning near shelves and curtains as these
restrict air movement.
• Avoid heat sources such as direct sunlight, heaters,
dimmer switches, and other electrical devices.
See Fig. 13 and Fig. 14.
CONTROL WIRING —
1. The communication wire should be 2-core stranded
shielded wire.
2. For indoor and outdoor unit communication, use P, Q
terminals. Shielded core should be used for ground.
3. Wiring should be done according to wiring diagram.
4. Communication wire must not form a closed loop.
5. Use separate conduit for power and control wiring.
P Q
P Q
To outdoor / indoor/
MDC unit comm.bus
Fig. 13 —Communication Wire Connection
ACB interface
To wired controller
comm.bus
LEGEND
ACB — Auxiliary Control Board
Fig. 14 — ACB Interface Wiring
P Q
HA HB
CN2
HA HB
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 the steps below.
1. Cut the connector on the outdoor unit side as shown in
Fig. 15.
Fig. 15 —Shearing Outdoor Connector
2. Strip a suitable length of the insulation layer as shown in
Fig. 16.
Fig. 16 —Stripping the Wire
3. Use a suitable screwdriver to fix the communication wire
on the outdoor unit communication terminal as shown in
Fig. 17.
Fig. 17 —Connecting Communication Wire to
Outdoor Unit Communication Terminal
If communication wires are used to connect between indoor
units, find the corresponding port and plug it in directly as
shown in Fig. 18.
Fig. 18 —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 Figs.
19-21.
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