Danfoss vlt FC 102 Programming Guide

3.23.6 25-9* Service
Parameters used if there is a service on 1 or more of the
pumps controlled.
25-90 Pump Interlock
Array [10]
Option: Function:
In this parameter, it is possible to
disable 1 or more of the xed lead
pumps. For example, the pump is
not selected for staging on even if
it is the next pump in the
operation sequence. It is not
possible to disable the lead pump
with the pump interlock command.
The digital input interlocks are
selected as [130] Pump 1 Interlock –
[132] Pump 1 Interlock in parameter
group 5-1* Digital In/Out.
[0] * O The pump is active for staging/
destaging.
[1] On The pump interlock command is
given. If a pump runs, it is
immediately destaged. If the pump
does not run, it is not allowed to
stage on.
25-91 Manual Alternation
Range: Function:
0* [ 0 - par.
25-06 ]
Readout parameter for the actual
variabl-speed pump in the system.
When an alternation takes place,
the lead pump parameter is
updated to reect the current
variable-speed pump in the system.
If no lead pump is selected
(cascade controller disabled or all
pumps interlocked), the display
shows N1.
Parameter Descriptions Programming Guide
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Danfoss vlt FC 102 Specifications

General

Category	DC Drives
Model	Danfoss VLT FC 102
Output voltage range	0 to rated motor voltage
Power range	0.37 kW to 200 kW
Communication interfaces	RS-485
Protection features	Overvoltage, undervoltage, overcurrent, short circuit, earth fault, overtemperature, motor thermal protection
Cooling method	Air-cooled
Enclosure rating	IP20, IP21, IP55 (depending on model)
Approvals	CE, UL, cUL