4.3.4 Control Wire Connection between Drive and Filter
In order to make the filter start when the drive starts, the control cards of the different sections are connected. For D and E frames these connections
and the corresponding programming of the drive are already made at the factory. After assembling the two sections of the F frame, the following
connections must be made:
1.
Connect terminal 20 on the filter control card to terminal 20 on the drive control card. For information on how to connect control wires, see the
Electrical Installation
chapter.
2.
Connect terminal 18 on the filter to terminal 29 on the drive.
3.
Set par. 502
Terminal 29 Mode
on the drive LCP to [1], Output. See chapter
How to Operate the Low Harmonic Drive
for information on how
to use the LCP.
4.
Set par. 5-31,
Terminal 29 Digital Output
to [5] VLT Running.
5.
Push the Auto ON button on the filter LCP
NOTE!
For D and E frames this procedure is not necessary upon reception of the unit. However, if a factory reset is performed, the unit must
be reprogrammed as specified above.
VLT HVAC Low Harmonic Drive Instruction
Manual
4 How to Install
MG.16.A1.22 - VLT
®
is a registered Danfoss trademark
4-17
4
