Page 18
Adjust concentrate return rate
CAUTION!
Hazzard of HP pump destruction
Pressure indicated by pressure gauge PI110.58 must not
exceed 14 bar.
Please note
Concentrate return rate may only be adjusted by HygroMatik
GmbH service personnel or HygroMatik service partners.
Monitor permeate quality
The quality of the permeate is monitored via the conductivity measuring
cell (QE110.71). This measurement does not necessarily reflect the pure
water quality since it may have been altered by means of blending with
raw water.
If the conductivity reaches a defined warning threshold value (i.e
80 µS/
cm
), the red LED illuminates (after a time delay).
If the conductivity reaches the defined alarm threshold value (i.e.
100 µS/
cm
), the system shuts down.
Bypass (ROB plant only)
With the VL110.45 bypass valve, the water treatment system can be
bypassed. As such, in the event of a malfunction of the water treatment
system e.g., raw water, i.e. untreated water, can still be provided.
Blending (ROB plant only) The blending armature VL110.26 and a non-return valve are installed in
the raw water pipe.
The blending armature allows for adjusting pure water quality continously
from raw water quality to permeate quality (conductivity 5 to 20 µS/cm ).
Blending the permeate with raw water is achieved via the blending pipe.
Function
Description
Adjust concentrate return
rate (only to be
accomplished by trained
people)
Valve VL110.18 allows for setting the permeate/premeate return ratio and the
permeate/concentrate ratio. Pressure is monitored by pressure gauge PI110.58.
Further opening the valve
:
•
Lower pressure
•
More concentrate returned
•
Less permeate
Further closing the valve
:
•
Higher pressure
•
Less concentrate returned
•
More permeate
