Adjustment Of Concentrate Amount; Adjustment Of Recirculation Amount - BWT PERMAQ COMPACT 41 Installation And Operating Manual

 Supply raw water to the plant.
 Check that all water connec-
tions are tight.
 Before connecting the plant to
your dishwashing machine,
lead the permeate hose to
drain.
 Completely open the concen-
trate valve V02 (Section 10.2,
Fig 2) and close the re-
circulation valve V01 tightly.
(Section 10.2, Fig 2)
 Now switch on the power
supply and the main switch of
the plant located in the control
box.
 The plant must operate and
flush to drain for 20-30
minutes before readjusting the
concentrate/recirculation
valve.
 After flushing, readjust the
concentrate valve V02 and re-
circulation valve V01. Read
below paragraph
before commissioning
plant.
REMEMBER: Under all circum-
stances please observe the fol-
lowing:
 Maximum amount of
permeate:130 l/h, 10-25 ºC
 Operating pressure:14-16bar
 Maximum pressure:16bar
The permeate amount and maxi-
mum pressure must never exceed
the above-mentioned values. If
they do, the membranes of the
plant will be damaged.
7.1 Adjustment of concentrate
amount
Important: Read the entire chap-
ters 7.1, 7.2 and 7.3 before
adjusting.
The outlet amount has to be ad-
justed and whichever
amount is most suitable for your
plant depends on the inlet water
quality. A too high water utilisa-
tion will damage the membranes
of the plant. Provided that the
raw water complies with the
demands on the water quality,
the plant will be able to operate
with a water utilisation of 40, i.e.
the recovery of the plant is 40 %
(surface water 50 %). Using sof-
tened inlet water a recovery 70
to 80 % is obtainable depending
among
amount of organic material in the
water.
An easy way of checking the
outlet amount of the plant is:
O utletamoun l t
100 x permeateca
re cov ery
Ex.: BWT PERMAQ
with 40 % recovery:
Outletamou
carefully
the
41
When the requested amount of
outlet water has been obtained,
tighten the lock nuts on the outlet
valve so that it is locked. It is
important to check the outlet
amount after the lock nuts have
been tightened to make sure that
the valve has not moved. Both
lock nuts must be tightened.
Important! The outlet valve must
be locked on the prescribed outlet
amounts. If the outlet valve is
closed so that the outlet amount is
outlet
reduced, then the plant mem-
branes will become damaged.
other things on the

( h )
pacity ( l h )

permeate capacity
(%)
® Compact 41
100 x 130
  
nt 130 195 l
40
Outlet
amount (l/h)
130 195 43
7.2 Adjustment of recircula-
tion amount
Afterwards the
amount shall be adjusted by
loosening the lock nut on the
recirculation valve V01. Adjust-
ments shall be performed keep-
ing the amount of permeate at
maximum 130 l/h and at a tem-
peratures between 10-25 ºC.
If the temperature is below 10
ºC, then the capacity must be
approx. 3 % lower than the nor-
mal capacity for each degree
below 10 ºC.
To reach a normal permeate
l ( ) h
capacity the pressure shown on
the manometer must be approx.
14,5 to 16 bar PI1. (Section
10.2, Fig. 1)
h
When the requested pressure and
permeate capacity
obtained, please check again if
the outlet amount has been ad-
justed correctly. (We recommend
loosening the lock nut while fine-
adjusting the valves).
When both valves have been
adjusted they are to be locked by
means of the lock nuts. Be careful
not to move the valve when tight-
ening the nuts.
Note: After the valves have been
locked, the plant must be started
and stopped 3 times and then the
flow must be checked again.
Readjust the valves if necessary.
Now check the quality of the
treated water at the permeate
outlet (Section 10.2, Fig. 3).
to see if the conductivity is below
the 50 μS/cm.
The plant operating pressure can
be read on high-pressure ma-
nometer PI1, 14,5-16 bar.
Check that the RO plant stops
automatically in case of too low
UK
recirculation
has been
6