Danfoss VLT HVAC Basic Drive FC 101 Programming Guide

3.15.3 22-3* No-ow Power Tuning
Tuning sequence:
1. To stop ow, close the main valve.
2. Run with motor until the system has reached
normal operating temperature.
3. Press the [Hand On] key on the LCP and adjust
speed for approximately 85% of the rated speed.
Note the exact speed.
4. Read power consumption either by looking for
actual power in the data line in the LCP or call
parameter 16-10 Power [kW] in the Main Menu.
Note the power readout.
5. Change speed to approximately 50% of the rated
speed. Note the exact speed.
6. Read power consumption either by looking for
actual power in the data line in the LCP or call
parameter 16-10 Power [kW] in the Main Menu.
Note the power readout.
7. Program the speeds used in parameter 22-33 Low
Speed [Hz] and parameter 22-37 High Speed [Hz].
8. Program the associated power values in
parameter 22-34 Low Speed Power [kW] and
parameter 22-38 High Speed Power [kW].
9. Switch back pressing [Auto On] or
[O].
NOTICE
Set parameter 1-03 Torque Characteristics before tuning
takes place.
22-30 No-Flow Power
Range: Function:
0 kW* [0 - 1000 kW] Readout of calculated no-ow power at
actual speed.
22-31 Power Correction Factor
Range: Function:
100 %* [1 - 400 %] Set a correction if no-ow detection reacts
on a too low or too high power value.
22-33 Low Speed [Hz]
Range: Function:
0 Hz* [ 0 - 400 Hz] Set output speed used for registration of
no-ow power at low speed.
22-34 Low Speed Power [kW]
Range: Function:
0 kW* [ 0 - 5.50 kW] Set no-ow power at low speed.
22-37 High Speed [Hz]
Range: Function:
0 Hz* [ 0 - 400 Hz] Set output speed used for registration of
no-ow power at high speed.
22-38 High Speed Power [kW]
Range: Function:
0 kW* [ 0 - 5.50 kW] Set no-ow power at high speed.
3.15.4 22-4* Sleep Mode
Sleep mode allows the frequency converter to stop itself in
situations where the system is in balance. This function
saves energy and prevents excessive pressure, water
excessively cooled in cooling towers, and building pressuri-
zation problems in the system. This is also important as
some applications prevent the frequency converter from
adjusting the motor down to low speed. This might
damage pumps, cause insucient lubrication in gearboxes,
and make fans unstable.
The sleep controller has 2 important functions:
1. The ability to go to sleep at the right time.
2. The ability to abandon sleep mode at the right
time.
The goal is to keep the frequency converter in sleep mode
as long as possible to avoid cycling the motor on and
o
frequently, and also keep the controlled system variable
within the acceptable range.
The sequence when running sleep mode in open loop:
1. The motor speed is less than the speed set in
parameter 22-47 Sleep Speed [Hz]. The motor runs
longer than the time duration set in
parameter 22-40 Minimum Run Time. The sleep
condition lasts longer than the time set in
parameter 22-48 Sleep Delay Time.
2. The frequency converter ramps the motor speed
down to parameter 1-82 Min Speed for Function at
Stop [Hz].
3. The frequency converter activates
parameter 1-80 Function at Stop. The frequency
converter is now in sleep mode.
4. The frequency converter compares the speed
setpoint with parameter 22-43 Wake-Up Speed [Hz]
to detect a wake-up situation.
5. The speed setpoint is greater than
parameter 22-43 Wake-Up Speed [Hz]. The sleep
condition has lasted longer than the time set in
parameter 22-41 Minimum Sleep Time. The wake-
up condition lasts longer than the time set in
parameter 22-49 Wake-Up Delay Time. The
frequency converter is now out of sleep mode.
Parameters
VLT
®
HVAC Basic Drive FC 101
90 Danfoss A/S © 04/2018 All rights reserved. MG18B502
33

Danfoss VLT HVAC Basic Drive FC 101 Specifications

General

Brand	Danfoss
Model	VLT HVAC Basic Drive FC 101
Category	DC Drives
Language	English