Danfoss VLT HVACDrive User Manual

NOTE!
If the drive is equipped with a constant speed bypass with an automatic bypass function that starts the bypass if the drive experiences
a persistent alarm condition, be sure to disable the bypass’ automatic bypass function, if [2] Alarm or [3] Man. Reset Alarm is selected
as the dry pump function.
22-27 Dry Pump Delay
Range: Function:
10 s* [0 - 600 s] Defines for how long the Dry Pump condition must be active before activating Warning or Alarm
22-40 Minimum Run Time
Range: Function:
10 s* [0 - 600 s] Set the desired minimum running time for the motor after a start command (digital input or bus)
before entering sleep mode.
22-41 Minimum Sleep Time
Range: Function:
10 s* [0 - 600 s] Set the desired minimum time for staying in sleep mode. This will override any wake-up conditions.
22-42 Wake-up Speed [RPM]
Range: Function:
Application
dependent*
[Application dependant]
22-43 Wake-up Speed [Hz]
Range: Function:
Application
dependent*
[Application dependant]
22-44 Wake-up Ref./FB Difference
Range: Function:
10 %* [0 - 100 %] Only to be used if par. 1-00 Configuration Mode is set for closed-loop and the integrated PI controller
is used for controlling the pressure.
Set the pressure drop allowed in percentage of setpoint for the pressure (Pset) before canceling the
sleep mode.
NOTE!
If used in application where the integrated PI controller is set for inverse control (e.g., cooling tower applications) in par. 20-71
PID
Performance
, the value set in par. 22-44 Wake-up Ref./FB Difference will automatically be added.
7 How to Program the Adjustable Frequency
Drive
VLT
®
HVAC Drive Instruction Manual
7-44 MG.11.AB.22 - VLT
®
is a registered Danfoss trademark
7

Danfoss VLT HVACDrive Specifications

General

Brand	Danfoss
Model	VLT HVACDrive
Category	DC Drives
Language	English