Carrier 48TC**16 Unit without Thru-Base Connection Kit, Typical Low-Voltage Control Connections

Typical

Thermostat

Connections

C

G

W2

W1

O/B/Y2

(see Note)

Y1

R

Central

Terminal

Board

X

C

T

GH E

W2	R
	M
	O
W1
	S
	T
Y2
	A
	T
Y1
R

Unit without Thru-Base Connection Kit —

Pass the thermostat control wires through the bushing on the unit end panel. Route the wire through the snap-in wire tie and up to the web bushing near the control box.. Route the wire through the bushing and into the bottom left side of the control box after removing one of the two knockouts in the corner of the box. Use a connector at the control box to protect the wire as it passes into the control box. Pull the wires over to the terminal strip at the upper left corner of the Central Terminal Board (CTB). Use the connector at the control box and the wire tie to take up any slack in the thermostat wire to ensure that it will not be damaged by contact with the condenser coil. See Fig. 39.

NOTE: If thru-the-bottom connections accessory is used, refer to the accessory installation instructions for information on routing power and control wiring.

48TC**16

Note: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2. Do not configure for O output.

Field Wiring

C10903

Fig. 38 - Typical Low-Voltage Control Connections

Thermostat Wire

C10886

Fig. 39 - Thermostat Wire Routing

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second-stage heating, when available.

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