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Selecting motor speed
Selecting the Constant Torque Blower Speed
This air handler uses a Constant Torque high efficiency motor. This motor operates on 240 VAC. The motor speed taps are
24 VAC, 0.03 amps, 60 Hz, 1 PH. The speed taps can be adjusted according to installation needs. Table 4 shows the motor
lead connection labeling and the connection denitions. See blower tables in later section for airow data.
Total 24 VAC circuit amps are 0.14 amps.
Change Motor Speeds
1. Turn off all electrical supply circuits to the air handler at the main service (House Circuit Breaker) panel.
2. Remove the blower door and switch air handler circuit breaker(s) to "OFF".
3. Disconnect the wire from the isolation relay terminal and reconnect the desired wire to the terminal. The RED wire is high
speed. The VIOLET wire is mid speed. The GREEN wire is low speed. The ORANGE wire is electric heat high fan speed. The
ORANGE wire must be connected to a speed tap that will provide sufficient airflow for the size of the electric heat kit. Refer
to the heat kit installation manuals for minimum CFM for electric heat kit activation.
4. Turn the circuit breakers on and reinstall air handler blower door.
5. Turn on all electrical supply circuits to the air handler at the main service (House Circuit Breaker) panel.
6. When black wire(Standard) is required to be connected to tap 5, the orange wire which originally is connected to tap 5 can be
connected to any tap except tap 5.
Terminal
C
Speed tap common - 24 VAC common
L
Supply voltage - 240 VAC Line 1
G
Ground connection
N/L2
Supply voltage - 240 VAC Line 2
T1
Low speed tap - 24 VAC input
T2
Medium-low speed tap - 24 VAC input
T3
Medium speed tap - 24 VAC input
T4
Medium-high speed tap - 24 VAC input
T5
High speed tap - 24 VAC input
DB68-11271A-02_IM_CAC Universal AHU Indoor_AA_EN_.indd 29
Connection
Motor control/voltage taps
Default speed tap settings
"Low" speed
"Mid" speed
"High" speed
High speed for electric heat
English
29
2022-09-15 오전 9:53:23
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