Manual 2100-689J
Page
33 of 42
Unit
Operation
Thermostat Inputs – 24VAC
Speed Taps
Blower Speed
Compressor
Operation
G
Y1
Y2 W1 W2
A
D
1
2
3-4-5
1
Blower Only
X
X
Vent/Blower Only
Off
Balanced Climate Cooling
X
X
X
X
Balanced Climate
On
Full Load Cool
X
X
X
X
X
X
Lo/Med/Hi
On
1st Stage Heat
X
X
Lo/Med/Hi
Off
2nd Stage Heat
X
X
X
Lo/Med/Hi
Off
Dehumidify
2
X
X
X
Balanced Climate
On
¹
Fan speed is selectable through the blower speed control terminal block. LO (default), MED or HI speeds can be used.
2
Dehumidification operation is disabled when a call for heating or cooling occurs. Unit runs at Balanced Climate speed
during dehumidification operation.
TABLE 15
Blower Speeds for Unit Operational Modes
FIGURE 15
Speed Taps
Orange Wire
w/Black Stripe
Speed Tap 1 – Vent/Blower Only
Speed taps 1 and 3 are programmed to identical
torque settings in the ECM motor. This means that if
speed tap 1 is energized, the airflow amount will be
the same as default airflow. Tap 1 is used when a vent
is installed and ventilation is called for by energizing
the A terminal of the low voltage terminal block with
24VAC. Speed tap 1 is the lowest priority; if any of the
other speed taps are energized, they will override speed
tap 1.
Speed Tap 2 – Balanced Climate
Speed tap 2 is programmed to a lower than rated
speed in the ECM motor. In order for Balanced Climate
speed to be used during compressor cooling mode,
the jumper between Y1 and Y2 must be removed. This
means that if speed tap 2 is energized, the airflow
amount will be lower than default airflow. Tap 2 is
used when Balanced Climate is called for by energizing
the Y1 terminal of the low voltage terminal block with
24VAC. Speed tap 2 is overridden if taps 3, 4, or 5 are
energized.
Speed Tap 3 – Default LO Cooling & Heating
Speed tap 3 is programmed for rated speed in the
SelecTech motor. This means that if speed tap 3
is energized, the airflow amount will be the default
airflow. Tap 3 is used by default when cooling is called
for by energizing the Y1 terminal of the low voltage
terminal block with 24VAC. The unit is shipped with
the jumper between Y1 and Y2 installed and it must
be removed to use Balanced Climate mode. The unit
is shipped with the orange/black wire connected to
terminal LO (rated speed) on the blower selection
speed terminal block. Speed tap 3 can be overridden
if taps 4 or 5 are energized by changing the position
of the orange/black wire on the blower selection speed
terminal block to MED (4) or HI (5) positions.
Speed Tap 4 – Optional MED Cooling & Heating
Speed tap 4 is programmed to a higher than rated
speed in the ECM motor. This is a user-selectable
airflow amount that will be higher than rated airflow.
Tap 4 is used for cooling operation if the orange/black
wire on the blower speed selection terminal block is
moved to MED. Speed tap 4 can be overridden if tap 5
is energized.
Speed Tap 5 – Optional HI Cooling & Heating
Speed tap 5 is programmed to the highest speed in the
ECM motor. This is a user-selectable airflow amount
that will provide the highest rated airflow. Tap 5 is used
for cooling operation if the orange/black wire on the
blower speed selection terminal block is moved to HI.
