KSB Hya-Solo DSV Series User Manual

9 Servicing/Maintenance
33 of 44
Hya-Solo DSV
4. Check expansion joints for wear (if applicable).
5. Verify the pre-charge pressure level and check the accumulator for integrity if
required. (ðSection9.2.3,Page33)
6. Check the automatic switching functionality.
7. Check the start and stop points of the pressure booster system.
8. Check the water inflow, inlet pressure, lack-of-water monitoring, flow
monitoring and pressure reducer.
9. Check the inlet tank and the float valve (if applicable). Check the overflow for
integrity and cleanliness.
9.2.3 Setting the pre-charge pressure
WARNING
Wrong gas
Danger of poisoning!
▷ Use only nitrogen to charge the accumulator.
The pre-charge pressure in the accumulator should be set to a value below the set
start-up pressure.
The setting can be effected via a valve located under the cover at the top of the
accumulator.
Example: Pre-charge pressure 10% lower than start-up pressure
Pre-charge pressure of accumulator p=0.9xp
start
p
start
= start-up pressure of pressure booster system
Recommendation
The stated values are average values. Tests on accumulators have shown that the best
storage volumes are achieved with the following factors:
pressures >3bar: factor0.9 and
pressures <3bar: factor0.8
Example:
p
start
= 5 bar: pre-charge pressure 5x0.9=4.5bar
p
start
=2bar: pre-charge pressure 2x0.8=1.6bar
CAUTION
Pre-charge pressure too high
Damage to accumulator!
▷ Observe data provided by accumulator manufacturer (see name plate or
operating manual of accumulator).

KSB Hya-Solo DSV Series Specifications

General

Brand	KSB
Model	Hya-Solo DSV Series
Category	Water Pump
Language	English