ACH550 User's Manual
90
Application macros and wiring
2. Supply fan
This application macro is for supply fan applications where the
supply fan brings fresh air into the room according to the signals
received from the transducer. See the figure below.
When using a direct speed reference in the AUTO mode, the
speed reference must be connected to analog input 1 (AI1) and
the START command is given with digital input 1 (DI1). In the
HAND/OFF mode, the speed reference and START command
are given through the control panel (operator keypad).
If process PI(D) is used, the feedback signal must be connected
to analog input 2 (AI2). By default, the setpoint is set from the
control panel, but it can also be changed to analog input 1.
Process PI(D) must be commissioned and adjusted with
parameters (
) or using the PID
control assistant (recommended).
Summary of Contents for ACH550-01
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