Hydrovar Pump Controller Installation & Operation Manual

Programming
Calculations of the new required value for multi pump applications:
k ... number of active pumps (k >1)
p = p set + (k-1)*[lift value – fall value]
• Lift value = Fall value ⇒ Pressure constant independent of how many pumps are in operation
• Lift value > Fall value ⇒ Pressure rises when assist pump switches on
• Lift value < Fall value ⇒ Pressure falls when assist pump switches on
The following 3 parameters are responsible for starting the assist pumps and to calculate the new required
value.
0505
0505 ACT. VAL. INC.
5 PSI
Lift value
Possible settings: 0.00 – to the pre selected sensor range
0510 ACT. VAL. DEC.
0510
2 PSI
Drop value
Possible settings: 0.00– to the pre selected sensor range
0515
0515 ENABLE FRQ
48.0 Hz
Possible settings: 0.0 – 70.0 Hz
Enable frequency for the next drive
Sets the frequency for the next pump to turn on. If a pump in the system reaches this frequency and the
system pressure drops below the REQUIRED VALUE [02] - ACTUAL VALUE DECREASE [0510], the next
pump is started.
0520
0520 ENABLE DLY
5 sec
Possible settings: 0 – 100 sec
Enable delay time (for cascade relay only!)
Delay, in seconds, after the current pump reaches the enable frequency, before the next pump turns on.
0525
0525 SW DELAY
5 sec
Possible settings: 0 – 100 sec
Switch delay (for cascade relay only!)
Delay time between two switching actions of the fix speed pump. The parameter prevents the system
repeated switching actions caused by varying demand.
58
G
S
G
S
G
S
S
S