DP Pumps Hydro-Unit Premium Line F, Installation & Operating Manual

Page: 42 / 64

42 / 64
Warning Description
3 V out of range Internal 3 V outside valid range.
External OFF Warning when opening the "external OFF" contactor.
Curr. temp. too high Ambient temperature (parameter 3-4-4-3) exceeded.
Failure VFD
7.1.10 Connecting the remote ON/OFF input
1. Establish the connection in accordance with the wiring diagram.
7.1.11 Connecting the fire alert
1. Establish the connection in accordance with the wiring diagram.
7.1.12 Filling the accumulator
The energy-saving mode prevents the pump sets from starting if only a very small amount of
water (e.g. caused by leakage) is required. The required fluid can be supplied from the
accumulator (discharge-side accumulator). [
ð
Section 7.1.13, Page 42]
ü
Logged in at Service level.
1. Select parameter 3-5-4 (charging accumulator).
2. Accumulator filling (setting setpoint).
3. Select parameter 3-11-4 (time Direct OFF).
4. Set the time period the pump is to keep on running in order to fill the accumulator before
stopping.
ð
The accumulator is being filled.
5. Set the setpoint to 0.
ð
The function is disabled.
7.1.13 Energy-saving mode
CAUTION
Hunting (excessive starting/stopping) of pressure booster system
Damage to the pumps!
Ø
Only activate the energy-saving mode if a sufficiently sized accumulator is
fitted on the discharge side.
NOTE
No recommendation can be given for the parameters of the energy-saving
mode.
The values depend on the system installed and can only be defined at the
operational pressure booster system installed on site.
In conjunction with a very large discharge-side accumulator, the energy-saving mode
ensures that the pressure booster system runs at an energy-efficient operating point when
required to supply very small amounts of water. If a very small amount of water is
consumed, the pressure booster system fills the downstream accumulator and stops. Any
small water volumes required can then be supplied from the accumulator.
ü The accumulator has been filled. [ ð Section 7.1.12, Page 42]
ü Logged in at Service level.
1. Close the discharge-side shut-off valve slowly until only a single pump set is left running
and delivering a small amount of water.
2. Read and record the pump load in parameter 1-1-2.