INSTALLATION (cont’d)

WIRING

!CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until instal- lation is complete.

NOTE

This typical wiring diagram shows only the terminal identification and wiring hookup. Always refer to wiring instructions, provided by equipment manufacturer, for system hookup operation.

All wiring should be done according to local and national electrical codes and ordinances.

Varying the wiring can alter the thermostat/system operation as shown below:

-For the thermostat to cycle both fan and valve, connect all wires as shown.

-For the thermostat to cycle fan only (if valve is not used), do not connect the thermostat orange wire to the system. Wrap orange lead with approved electrical tape or wire nut to prevent shorting.

-For the thermostat to cycle the valve only (with fan on continuously), Connect orange wire to L1 and black wire to VALVE. Connect all other wires as shown.

NOTE: With the system switch in the OFF position, the thermostat will prevent both the fan and valve circuits from turning on.

 

 

FAN

 

VALVE

L1*

 

 

 

 

 

 

HIGH

MED

LOW

(SOL)

(HOT) GND

 

TAN

BLUE

RED

ORANGE

BLACK

GREEN

CUSTOMER

 

 

 

 

 

CONNECTIONS

THERMOSTAT

SCHEMATIC

HIGH

FAN MED

SWITCH

LOW

HEAT

RED

HEAT

 

COOL

 

 

SYSTEM

SWITCH OFF

COOL

BLUE

*L1 is Power In

Note: Above FAN and SYSTEM switches shown in MED and HEAT positions respectively.

1A11-2

5-wire with ground, for single valve,

manual heat/cool changeover

The Emerson logo is a

 

trademark and a service mark

3

of Emerson Electric Co.

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Emerson 1A11-2 installation instructions Installation cont’d, Wiring

1A11-2 specifications

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