HygroMatik WL-ROL 160-1200 Series, Руководство пользователя

Страница: 13 / 76

Page 13
4.4 Operating sequence
The feed water (raw water) is pumped
through the pre-filter, which guarantees the
de-chlorination and a final filter capacity of 5
µm. This ensures the necessary clarity of the
water at the membrane inlet. It is next softe-
ned by the addition of an antiscalant (if used).
The feed water pressure must be at least 2 to
5 bar during normal operation to ensure a
correct supply pressure at the pump inlet.
The water then flows through the water inlet
solenoid valve SV1 and is then directed by
the pressure pump at high pressure to the
membrane(s).
The pressure switch PS HIGH provides a
signal when the pressure exceeds 12 bar at
the membrane inlet.
Pure water (permeate) passes through the
membrane; the salts solved in the water are
retained by the membrane and drained off
(concentrate).
The permeate now flows via the pure water
line (scope of delivery) to the expansion ves-
sel or directly to the consumer.
The quality of the permeate leaving the
system is controlled by the
conductivity
sensor (EC PROBOUT) .
The production process stops automatically
when the water outlet pressure has reached
approx. 4 bar at the
pressure switch PS
MAX . The pressure in the following circuit is
kept constant by the expansion vessel.
If the pressure in the following circuit at the
pressure switch PS MIN falls below 2 bar
(when the expansion vesel is empty), the unit
starts permeate production again.
If the inlet pressure falls below 0.8 bar, the
pressure switch
PS LOW gives the corre-
sponding alarm and interrupts operation.
The permeate production quantity achieved
can be read off from the permeate flow rate
display (Ref1). If this does not correspond to
the the specifications in the technical data,
please note the measures mentioned in
chapter 4.2 ff..
The reverse osmosis (R.O.) units of the WL -
ROC series cannot operate without an
expansion vessel or permeate collecting
tank.
NOTICE