Xylem HYDROVAR (HV2.1 - 3.45) - Manual (Page 44)

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Ramp settings:
• Time setting of the Ramps will influence the control of the pump and shouldn’t be changed
at standard operation.
• Possible setting of each Ramp 0,05 - 1000 sec.
• The fast Ramps 1 and 2 are determined by the type (power) of the HYDROVAR.
(Default = 4 sec.; depending on the power of the HYDROVAR you should increase the time
up to 15s)
• The Ramps 3 and 4 determine the speed of the internal HYDROVAR controller and depend
on the system, that has to be controlled. (Default = 70 sec.)
To adjust the Ramps, press Ï or Ð
9.4 Ramp 1: Fast acceleration time
RAMP 1
4.0 Sec
• Excessively fast running up time may cause an error
(OVERLOAD) during the HYDROVAR is starting.
• Excessively slow running up time may cause a drop of
the outgoing pressure during operation.
Press the ¾ button to change to the next parameter
9.5 Ramp 2: Fast deceleration time
RAMP 2
4.0 Sec
• Excessively fast running down time tends to cause an
error (OVERVOLTAGE)
• Excessively slow running down time tends to generate
over pressure.
Press the ¾ button to change to the next parameter
9.6 Ramp 3: Slow acceleration time
RAMP 3
70 Sec
• A too fast running up time may lead to oscillation
and/or an error (OVERLOAD).
• A too slow running up time can cause a drop of the
outgoing pressure during variation of the demand.
Press the ¾ button to change to the next parameter
9.7 Ramp 4: Slow deceleration time
RAMP 4
70 Sec
• A too fast running down time leads to oscillation of
the HYDROVAR and thereby of the pump.
• A too slow running down time can cause pressure
fluctuations during variation of the demand.
Press the ¾ button to change to the next parameter