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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 AMST 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.