Xylem hydrovar - Page 62

P225 RAMP 3
70 sec
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter adjusts the slow acceleration time, thus determining:
• The regulation speed of the internal HYDROVAR controller for small changes in
demand.
• The constant outgoing pressure.
The ramp (default value 70 sec, possible setting 1–1000 sec) depends on the system
which has to be controlled. For more information, see Example: P200 Ramp Settings
(page 102).
P230 RAMP 4
G
NOTICE:
• Fast running down time can cause oscillation of the unit and the pump
• Slow running down time can cause pressure fluctuations during variation of the
demand.
P230 RAMP 4
70 sec
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter adjusts the slow deceleration time, thus determining:
• The regulation speed of the internal HYDROVAR controller for small changes in
demand.
• The constant outgoing pressure.
The ramp (default value 70 sec, possible setting 1–1000 sec) depends on the system
which has to be controlled. For more information, see Example: P200 Ramp Settings
(page 102).
P235 RAMP FMIN A
G
NOTICE:
Fast running up time can cause errors (overload) during start.
P235 RAMP FMIN A
2.0 sec
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter (default value 2.0 sec, possible setting 1.0- 25.0 sec) sets the ramp Fmin
acceleration (fast running up time), and it operates HYDROVAR until the selected P250
MIN.FREQ. is reached; after Fmin is passed, P215 RAMP 1 starts to work. For more
information, see Example: P200 Ramp Settings (page 102).
8 Programming
60 HVL 2.015-4.220 Installation, Operation, and Maintenance Manual