HygroMatik WL-ROL 160-1200 Series, Руководство пользователя

Страница: 30 / 76

Page 30
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.
Do not exceed the permitted pump pres-
sure!
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
Multi-step pump (in the models from 460 l/h
to 1.000 l/h):
» Adjust the ball valve downstream of
the pump manually
» 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.