Honeywell SmartVFD HVAC MR4 User Manual page 92

HVAC A
PPLICATION
3. HVAC A
The drive contains a preloaded application for instant use.
The parameters of this application are listed in chapter 3.5 of this manual and explained in more
detail in chapter 3.6.
3.1 Specific functions of SmartVFD
The SmartVFD HVAC is an easy-to-use application for basic Pump and Fan applications where
only one motor and one drive is needed and also offers extensive possibilities for PID control.
Features
• Loc/Rem-button for easy change between Local (keypad) and Remote control place.
The remote control place is selectable by parameter (I/O or Fieldbus)
• Control page for easy operation and monitoring of the most essential values.
• Run interlock input (Damper interlock). Drive will not start before this input is activated.
• Different pre-heat modes used to avoid condensation problems
• Maximum output frequency 320Hz
• Real-time clock and timer functions available (optional battery required). Possible to
program 3 time channels to achieve different functions on the drive (e.g. Start/Stop and
Preset frequencies)
• External PID-controller available. Can be used to control e.g. a valve using the drive's
I/O
• Sleep mode function which automatically enables and disables drive running with
user defined levels to save energy.
• 2-zone PID-controller (2 different feedback signals; minimum and maximum control)
• Two setpoint sources for the PID-control. Selectable with digital input
• PID setpoint boost function.
• Feedforward function to improve the response to the process changes
• Process value supervision
• Multi-Pump control
PPLICATION
Honeywell
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