piping.
Expansion joints are subject to wear.
6.4.2 Installing a pressure reducer
NOTE
A pipe length of approximately 600 mm must be provided on the inlet pressure side to
accommodate a pressure reducer, if necessary.
NOTE
A pressure reducer must be installed
- if the inlet pressure fluctuation is too high for the pressure booster system to operate as
intended or
- if the total pressure (inlet pressure plus shut-off head) of the pressure booster system
exceeds the design pressure.
The maximum pump discharge pressure at zero flow point is reached in manual mode.
A minimum pressure gradient of 5 metres is required for the pressure reducer to
fulfill its function. The pressure downstream of the pressure reducer (downstream
pressure) is the basic parameter for determining the pump head.
For example:
The inlet pressure fluctuates between 4 and 8 bar. A pressure reducer is needed
upstream of the pressure booster system on the inlet pressure side.
Min. inlet pressure (p
inl
) = 4 bar
Min. pressure gradient = 0.5 bar
Downstream pressure = 3.5 bar.
6.5
Installing unpressurised inlet tanks
Installation and location of an unpressurised inlet tank together with the pressure
booster system are governed by the same rules applicable to the pressure booster
system.
Install the closed PE inlet tank (under atmospheric pressure) available as a KSB
accessory as described in the installation instructions supplied with the tank.
CAUTION
Contamination in the pressure booster system
Damage to the pumps!
▷
Clean the tank before filling it.
The tank must be connected mechanically and electrically to the pressure booster
system prior to commissioning of the system.
6.6
Fitting the dry running protection device
Install the dry running protection device supplied together with the pressure booster
system as a separate, non-fitted accessory, or supplied at a later date for retrofitting,
in accordance with its operating instructions and connect it to the digital input 1
(terminals 13 and 14 on terminal strip P4) of the PumpDrive. (
This digital input is assigned exclusively to the Start/Stop function and is bridged if
the system is supplied without a dry running protection device. Only dry running
protection devices can be used which open a contact when dry running occurs.
No cut-out delay can be set.
6 Installation at Site
Hya®-Solo DV
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