Setting Permeate Outlet Pressure; Use Of By-Pass; Automatic Functions - BWT PERMAQ COMPACT 41 Installation And Operating Manual

raw-water pressure or lacking
raw-water supply. This is done by
slowly shutting off the raw-water
supply while the RO plant is still
operating. When the water sup-
ply has been interrupted, the RO
plant should stop automatically
within 10 seconds, depending on
the settings.
To put the RO plant back into
operation the water must be re-
established and the power of the
plant must be disconnected for 5
seconds and subsequently recon-
nected, upon which the RO plant
will be operating normally.
7.3 Setting permeate outlet
pressure
When opening consumption of
permeate, it will, to begin with,
be supplied at a pressure of ap-
prox. 4.2 bar and then it drops
to approx. 2.0 bar over a period
of 15 seconds. If e.g. the demand
is 2.2 bar for the entire period,
then it may be adjusted by throt-
tling the permeate valve V03
(Section 10.2, Fig. 3)., however
this prolongs the period in which
the water is supplied.
The plant is now operating and
ready for use.
7.4

Use of by-pass

Furthermore the plant is supplied
with a bypass for raw water, e.g.
if for some reason the plant is
exposed to operational disturb-
ances, you will be able to open
this valve and thus gain access to
the raw-water outlet for consump-
tion. Turn the switch on the back
to "by-pass".
IMPORTANT! When the plant is
restarted, you must remember to
close the by-pass valve again,
otherwise you will get a mixture
of permeate and raw water on
the outlet.
8 AUTOMATIC
FUNCTIONS
®
The BWT PERMAQ Compact 41
plant comes with a control box
with following built-in functions:
 Time delay on raw water
pressure switch (P1): 2 sec-
onds
 Time delay on permeate pres-
sure switch (P2): 2 seconds
 Solenoid valve controls raw
water inlet
 The pressures switch stops the
plant in case of too low raw-
water pressure < 0.5 bar for
more than 2 min. A red lamp
on the control panel indicates
failure on the RO plant.
 Pressure switch control of the
pressure tank. The
pressure pump stops when the
pressure in the pressure tank
reach 5.2 bar, the RO flushes
and the pressure drops to 4.2
bar. The high-pressure pump
starts again when the pres-
sure reach 3.0 bar.
 Alarm will go off if pump has
been running for more than
20 min
 Discontinuation of pump will
be delayed by 10 seconds.
 Alarm conditions and DIP-
switch, se section 9.2.10 and
9.2.11.
high-
UK
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