Carrier 50SX024-060, 50SS018-060 owner manual Typical Duct Panel Knockouts

ROUTING CONTROL POWER WIRES Ð ICM UNITS (24 v) Ð Remove knockout in the duct panel (see Fig. 28). Remove the rubber grommet from the installer's packet (in- cluded with unit) and install it in the knockout opening. Route thermostat wires through grommet providing a drip loop at the panel. Connect low-voltage leads to the thermostat as shown in Fig. 31-34.

The Easy Select interface board is located in the return-air section and is attached to the duct panel. The Easy Select interface board is factory wired to the motor and factory de- fault selections are preset.

HIGH VOLTAGE POWER ENTRY (KNOCKOUT)

2″ DIA. 1 1/8″ DIA. 1 3/8″ DIA. 2″ DIA.

7/8″ DIA.

CONTROL POWER ENTRY*

*Knockout on rectangular-duct panel units; entry hole on round-duct panel units.

NOTE: For rectangular duct knockout sizes, see Fig. 2-9.

Fig. 28 Ð Typical Duct Panel Knockouts

UNIT POWER	UNIT LINE WIRE	WIRE-BINDING
LEAD	SPLICE BOX	SCREW

CONTROL POWER

SPLICE BOX

Fig. 29 Ð Wiring Splice Boxes

SPECIAL PROCEDURES FOR 208-V OPERATION

Make sure that the power supply to the unit is switched OFF before making any wiring changes. Electrical shock can cause personal injury or death.

1.Disconnect the orange transformer-primary lead from the contactor. See unit wiring label.

2.Remove the wirenut from the terminal on the end of the red transformer-primary lead.

3.Save the wirenut.

4.Connect the red lead to the contactor terminal from which the orange lead was disconnected.

5.Using the wirenut removed from the red lead, insulate the loose terminal on the orange lead.

6.Wrap the wirenut with electrical tape so that the metal terminal cannot be seen.

Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to Indoor Air¯ow and Air¯ow Ad- justments section on page 34.

Field Wiring

Splice Connections

NEC Ð National Electrical Code

NOTE: Use copper wire only.

Fig. 30 Ð Line Power Connections

Fig. 31 Ð Control Connections

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