Danfoss VLT FC 102 Programming Manual page 553

Programming Guide | VLT® HVAC Drive FC 102
Option Name
[0]* Disabled
[1] Enabled
25-02 Motor Start
Default value: [0] Direct on line
Setup:
2 setups
Data type: Uint8
Motors are connected to mains directly with a contactor or with a soft starter. When the value of parameter 25-02 Motor Start is set to an
option other than [0] Direct on line, parameter 25-50 Lead Pump Alternation is automatically set to the default of [0] Direct on line.
Option Name
[0]* Direct on line
[1] Soft starter
[2] Star-Delta
25-04 Pump Cycling Order
Default value: [0] Next in order
Size related:
All setups
Data type: Uint8
To provide equal hours of operation with fixed-speed pumps, the pump used can be cycled. The selection of pump cycling is either first
in-last out or equal running hours for each pump.
Option Name
[0] Next in order
[1] Least working first
25-05 Fixed Lead Pump
Default value:
[1] Yes
© 2024.10
Description
The cascade controller is not active. All built-in relays assigned
to pump motors in the cascade function are de-energized. If
a variable-speed pump is connected to the drive directly (not
controlled by a built-in relay), this pump/fan is controlled as a
single-pump system.
The cascade controller is active and stages/destages the pump
according to the load on the system.
Parameter type:
Conversion index:
Change during operation:
Description
Each fixed-speed pump is connected to mains directly via a
contactor.
Each fixed-speed pump is connected to mains via a soft starter.
Fixed pumps connected with star-delta starters are staged in
the same way as pumps connected with soft starters. They are
destaged in the same way as pumps connected directly to mains.
Parameter type:
Conversion index:
Change during operation:
Description
The fixed-speed pumps are connected in the order 1–2 and
disconnected in the order 2–1 (last in-first out).
The fixed-speed pumps are connected/disconnected to have
equal running hours for each pump.
Parameter type:
AU430028034214en-001901 / 130R0310 |
Parameter Descriptions
Option
–
False
Option
–
True
Option
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