Instructions / Assembly

17 Air Handler Low Voltage Connections

The following composite wiring diagrams detail various configurations in which the air handlers can be used. Examples

include single-stage cooling and heat pump with single or two-stage electric heating. All these configurations can be

applied with convenient connections to outdoor thermostat applications.

The following sections are detailed:

• Single-Stage Cooling

• Heat Pump

Each diagram details the connections between room thermostat and the air handlers, and the connections between the

air handlers and the Condensing Unit (or Heat Pump) with optional connections to Outdoor Thermostats. For each

configuration, refer to the explanation of the proper jumper(s) to remove for the corresponding blower speed that will

result in the programmed fixed speed ECM motor.

IMPORTANT: WHEN MATCHING THE ASPT AIR HANDLERS TO A SINGLE SPEED COOLING OR HEAT

PUMP UNIT, REMEMBER TO CONNECT “Y” FROM THE THERMOSTAT TO THE “Y2” ON THE LOW

VOLTAGE TERMINAL BOARD.

Any equivalent thermostat can be used in place of the manufacturer’s thermostat part number.