Operating instructions

The FB (furnace blower) relays were installed for an ADDI-

TIONAL FEATURE; to provide a circuit for the furnace

blower motor to enhance both the cooling and heating

operation.

NOTE: This circuit will not work with all furnaces. Before

sing this circuit, check with the furnace manufacturer for proper

wire connection to the furnace. Other components may or may

not be required. Read and follow the instructions provided with

the furnace.

INSTRUCTIONS FOR FURNACE CONNECTIONS:

THE FOLLOWING FURNACE CONNECTION INSTRUC-

TIONS ONLY PERTAIN TO ONE SPECIFIC FURNACE

MANUFACTURER, AND MAY NOT APPLY TO YOUR IN-

STALLATION.

Run a 12 volt DC positive lead to one of the gray wires in the

unit electrical box and secure with an approved connector.

Run a second lead from the furnace blower motor or terminal

board to the remaining gray lead in the unit electrical box. Se-

cure with an approved connector.