BWT PERMAQ Compact 951, Installation And Operating Manual

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EN
12
Start and stop of high-pressure pump.
Solenoid valve inlet raw water.
Pressure switch for start/stop of the transport
pump (Stop 4.2 bar Start 3.7 bar).
Option: Conductivity meter 0-200 µS/cm with
potential-free alarm outlet.
10 Maintenance and
Troubleshooting
10.1 Maintenance:
The RO plant is produced and designed for a
minimum of servicing and maintenance.
However, there are some functions which
should be checked regularly. (The interval is
described in the following).
Following must be checked regularly:
If the operating conditions of the plant or/and
capacity is changed compared to the day of
start-up, then the plant shall be checked for
possible cleaning of membranes or/and
adjustment of the plant capacity.

If the capacity has dropped by more
than 10 %

If the pressure after the high-pressure
pump has increased

If the conductivity has increased
(option)
See chapter dealing with trouble-shooting.
Daily:
1. Take a daily sample of the water from
the softening plant ahead of the RO-
plant; the hardness must be less than
1°dH.
2. Check also the salt bin, fill up if
necessary - and read:
3. Capacity permeate: (encl. 14.2 F fig.
2)
4. Conductivity: (option)
5. Pressure after the high-pressure pump:
(encl. 14.2 E fig. 2)
Every 6 months:
1. Check-up of pumps. Follow the
manufacturer’s guidelines.
2. Check pipelines and connectors for
leaks.
3. Check all pressure switches, i.e. their
function and settings.
4. Make a release test of the alarm.
5. Replace defective/buzzing switches
and relays.
6. The brine tank has to be emptied and
cleaned.
Note! If the plant has to be out of operation
for a long period, or if it may be exposed to
frost, each membrane element must be
preserved.
For how long the plant can be out of
operation without preserving the membranes,
depends on how extensive the organic growth
is. When using surface water, the membranes
must be preserved by standstills lasting 3 days
or longer, and when using ground water, the
membranes must be preserved by standstills
lasting 7 days or longer.
When preserving membranes, they must be
filled with a solution consisting of:
Mixture ratio
Preservation
[%]
Frost
protection
[%]
Mono Propylene
glycol
- 20
Sodium bisulphite 1 1