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ENG
Initial start-up
WTS LARGE +0300131IT rel. 1.0 - 05.09.2022
8.2.1 Increase of the working pres- sure before the membranes
If the maximum permeate quantity (Fl01*) is not reached although the recovery value cor- responds to the
specifications in the technical data, you can increase the permeate quantity by increasing the pressure before the mem-
branes.
Notice:
Do not exceed the permitted pump pressure!
This can lead to pump damage.
Select a low working pressure!
Although the diaphragms can be operated at a pressure of 5 to 12 bar, we recommend the lowest possible working
pressure (5 to 6 bar), both during commissioning and during nor- mal system operation. This allows for a lon- ger service
life of the diaphragm(s).
To increase the pump pressure, proceed as follows:
Rotary vane pump (in models from 100 l/h to 320 l/h):
» Open or close the by-pass valve (bypass) with a slotted screwdriver
* see figure previous page
Fig. 8.a
Multi-step pump (in the models from 460 l/h to 1.000 l/h):
» Adjust the ball valve downstream of the pump manually
Fig. 8.b
» Watch the pressure change on the manometer downstream of the pump and the flow rate change on the
pure water flow meter.
» Adjust until the desired flow rate is reached.
» Let the system run for 30 minutes.
» During this time, periodically check that the rated parameters (flow rates, pressures and conductivity) stabilise
within the limit values.
» Take a permeate sample (at the extraction point (E*)) and, if neces- sary, carry out a chemical-physical and
possibly bacteriological analysis to check the suitability of the water for the intended purpose.
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