Danfoss VLT FC 100 Series Programming Manual page 222

3. Parameter Description
* Off
[0]
[1] On
25-91 Manual Alternation
Option:
3
* 0 = Off - Number of
[0]
Pumps
222
The pump is active for staging/destaging.
The Pump Interlock command is given. If a pump is running it is immediately destaged. If the pump is not
running it is not allowed to stage on.
Function:
This parameter is only active if the options
Lead Pump Alternation .
The parameter manually controls what pump to be assigned as variable speed pump. The default value of Manual
Alternation is Off [0]. If a value other than
that is selected with Manual Alternation is the new variable speed pump. After the alternation has been carried
out, the Manual Alternation parameter is reset to
the actual variable speed pump, the parameter will be reset to [0] immediately after.
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
At Command At Staging or Command
or
Off [0] is set, the alternation is carried out immediately and the pump
Off
[0]. If the parameter is set to the number which equals
are selected in par. 25-50