BWT PERMAQ Compact 951 User manual

BW T PERM AQ®
Compact 951 – 953
Reverse Osmosis Plant
Installation and Operating Manual EN

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List of contents
1General .................................................................................5
2Definitions .............................................................................5
3Functional description ............................................................6
4Placement of plant.................................................................6
5Water quality ........................................................................7
6Water connections .................................................................7
6.1 Connection of raw water/inlet water:...........................................................................7
6.2 Connection of permeate outlet.....................................................................................7
6.3 Connection of outlet hose (concentrate) ........................................................................8
6.4 Connection of overflow hose .......................................................................................8
6.5 Connection of soft-water control valve ..........................................................................8
7Electric connections ................................................................8
8Commissioning of the plant ...................................................8
8.1 Start-up of softening plant ...........................................................................................8
8.1.1 Replacement of regeneration meter disk.................................................................9
8.2 Adjustment of outlet amount ......................................................................................10
9Automatic functions .............................................................11
10 Maintenance and Troubleshooting .......................................12
10.1 Maintenance:.......................................................................................................12
11 Replacement of membranes.................................................13
12 CIP-cleaning of membranes (OPTION) ..................................13
13 Technical data .....................................................................15
14 Technical specifications ........................................................16
15 Appendix ............................................................................17
15.1 Survey of Alarm Conditions ...................................................................................18
15.2 Settings ...............................................................................................................19
15.3 Trouble-shooting ...................................................................................................20

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15.3.1 Plant capacity has dropped.............................................................................20
15.3.2 Treated water quality is higher than 20 µS/cm..................................................20
15.3.3 Alarm: Transport pump ...................................................................................21
15.3.4 Indication: Level low.......................................................................................22
15.3.5 Alarm: level high OPTION ..............................................................................22
15.3.6 The plant is not operating ...............................................................................23
15.3.7 Alarm: The transport pump stops and starts .......................................................23
15.3.8 Hard water is measured at the soft-water sample valve.......................................24
15.4 P&I Diagram ........................................................................................................25
15.5 Arrangement Drawing...........................................................................................26
15.6 Wiring Diagram...................................................................................................27
15.7 Start-up test ..........................................................................................................35
15.8 Operating Journal.................................................................................................36
15.9 Spare parts..........................................................................................................37
15.9.1 Spare parts softening plant..............................................................................37
15.10 Declaration of Conformity......................................................................................45

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1General
This assembly and operating instruction
applies BWT PERMAQ Compact 950 total
desalination plants.
This assembly and operating instruction
contains important information about correct
installation and operation of the BWT
PERMAQ Compact 950 plant, consequently
the following is very important:
1. Enclosed ”Start-up control” shall be
filled in during commissioning and
filed along with the operating logbook.
2. The operating logbook shall be
updated as described under
”Enclosures”.
3. There must be a floor drain in
proximity of the plant. The drain shall
be dimensioned to the max flow from
the feed water.
4. The BWT PERMAQ Compact 950
plant removes 95-98 % of all salts. It is
possible to post-treat with a mixed-bed
or similar if a better water quality is
requested.
5. The instruction should be read carefully
before assembly and start-up of the
plant. Correct installation and service
will be a condition for our 12-month
warranty.
Therefore, read this instruction before
assembling or starting up the plant.
Your BWT PERMAQ Compact 950 plant is
made in a compact design with reservoir tank,
softening plant and reverse osmosis plant
joined in one unit to take up a little space as
possible.
Your BWT PERMAQ Compact 950 plant with
its compact and good finish is easy to install
since all internal installations are pre-fitted and
tested in our workshop.
Your BWT PERMAQ Compact 950 plant is
designed for minimum service and for long
and unproblematic operation.
However, this is on condition of correct
installation and maintenance.
You should therefore read this instruction
before taking the plant into use.
2Definitions
There will be some technical words in this
instruction, which we have explained below.
Permeate:
Is the treated, totally desalinated water which
is produced by the RO plant and supplied to
the reservoir tank.
Concentrate:
The water which is led to drain. This water
contains the salts and minerals which have
been removed from the water.
Raw water:
The water which is led to the RO plant and
which shall be desalinated.
TDS:
The amount of dissolved salts measured in the
unit mg/l.
Conductivity:
A designation for the salt concentration of the
water, measured in the unit μS/cm. The lower
the number, the better is the water quality.

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Membranes:
The filters of the plant, which under high
pressure and flow are capable of desalinating
the raw water.
RO:
The abbreviation for Reverse Osmosis.
Transport pump:
The pump which transports the treated water
from the plant reservoir tank to consumer.
Level sensor:
The sensor which emits a signal if the RO
plant shall start and stop the transport pump in
case of drainage of the reservoir tank.
Softening plant:
A pre-filter which softens the water, i.e.
removes hardness from the water.
3Functional description
The raw water is lead through an ion
exchange resin where the water is softened
before it is passed beside a pressure switch
which ensures the plant against dry running. A
sample valve is installed to test the hardness of
the water.
The high-pressure pump presses the softened
raw-water through the RO membrane high-
pressure pump. The desalinated
water/permeate will be led to a reservoir. The
water with the concentrated salts/concentrate
will be led to drain. The relation between
permeate/concentrate can be adjusted
manually by means of a needle valve.
When permeat is need for consumption a
transport pump delivers it to the consumer. A
pressure tank keeps two litres to ensure a
steady flow to the consumer. A pressure switch
starts/stops the transport pump as required.
There is a bypass valve installed which can be
used if power is lost. This will ensure softened
water to the equipment if required.
4Placement of plant
Important! If you move the plant by means of a
lifting truck, be careful not to damage the
supporting legs underneath the plastic tank.
The plant must be placed in non-freezing
ambiance on a level foundation so that the
water in the reservoir tank does not overflow
when the tank is full.
The foundation must be able to stand a weight
load of 900 kg in total which is the approx.
weight of the RO plant in operation. The
outside measures of the RO plant are WxDxH:
1500 x 660 x 1350 mm, but when placing
the plant, take into consideration that the
cover must be dismounted during
maintenance.
You must include 1000 mm extra height in
order to be able to extract the plant
membranes.
Also make room on the left side of the plant
for the water installation, especially the outlet
drain from the plant should be considered.
There must never be an obstruction in this
outlet!
Placing of the plant should be done in such a
way that the air intake at the top of the pump
never gets covered up.
Furthermore, there are readings which have to
be performed on the front of the plant, e.g.

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flow meter, manometer, conductivity meter
and alarms.
Therefore the front should not be covered up
but always remain visible.
In case of an error on the plant, situations may
arise where either the level in the reservoir
overflows or another kind of leak may occur.
Consequently there must be a floor drain in
proximity of the plant, placed in a way that
prevents such water from causing damage.
5Water quality
The raw water to be treated in the BWT
PERMAQ Compact 950 plant must be
drinking water quality with maximum 500
mg/l TDS.
The raw water may maximum contain:
Fe: 0.05 mg/l
Mn: 0.05 mg/l
Free Chlorine: 0.1 mg/l (if higher, a
carbon filter must be installed (option))
Turbidity max. 1.0 NTU
Siltindex: 3.0
KMnO4 max.: 10 mg/l
Maximum temperature: 25°C.
Note! The plant is factory set to operate at
10°C.
If there are doubts about the raw-water
composition, a water analysis will have to be
made.
The plant must be connected a raw-water
pressure of minimum 3 bar and maximum 7
bar.
The quality of the treated water will be <20
μS/cm at 10°C.
6Water connections
Note! All water connections of the plant must
be made in compliance with local regulations.
6.1 Connection of raw water/inlet
water:
A ball valve shall be installed at the inlet side
of the plant, so that the raw water can be
turned off when performing a service check of
the plant.
Connect raw water to the top connector at the
left side of the plant labeled “raw water”. We
recommend connection with ¾" flexible
pressure hoses. BWT HOH sells complete
assembly kits for the RO 950 series.
The best operating result is obtained by
connecting to minimum ¾" raw-water pipes.
In that way you will usually obtain the
necessary pressure and flow to the plant.
If the raw-water connection is too small, there
is a risk of outages on the plant due to lacking
water pressure/amount, e.g. during flushing of
the membranes or when the plant is started
up, which may entail a poor function of the
softening plant.
6.2 Connection of permeate outlet
Connect the outlet water (water to
consumption) to the bottom water connection
at the left side of the plant labeled “for
consumption”. We recommend connection
with ¾" flexible pressure hoses.
Note! Totally desalinated water may
accelerate corrosion, which is why you must
always use corrosion-proof piping for the
treated water, e.g. stainless steel or PVC-pipe.

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6.3 Connection of outlet hose
(concentrate)
The outlet water from the plant (concentrate) is
led out through the connection in the middle of
the left side of the plant labeled “concentrate”.
The water is led to floor drain.
Important! The outlet pipe may not be inserted
into the water in the floor drain as there is
then a risk that this water gets sucked back
into the plant during standstills.
Important! There must never be a resistance in
the outlet pipe, as this will damage the plant
membrane(s).
6.4 Connection of overflow hose
At the left side of the plant the overflow nozzle
shall connected to a ½” plastic hose which
shall be led to the floor drain. this overflow is
a safety overflow in case of errors occurring
on the plant level sensor and the reservoir tank
consequently gets overfilled.
6.5 Connection of soft-water control
valve
Install the test valve on the left side of the
plant. The test valve is to be fitted on the
connection closest to the front, see encl. 14.2
fig. 1 (the valve is in the salt tank).
7Electric connections
Note! The electric connections must be done in
compliance with local regulations.
The electric connection to the BWT PERMAQ
Compact 950 plant must be as follows:
Voltage: 3 x 400 Volt + 0 + Earth fuse: 16
Amp –3.5 kW
All internal connections in the plant like e.g.
pump control and level control have been
preassembled in our factory. They only have
to be connected to the main current in the
terminal box.
See also wiring diagram (enclosure).
8Commissioning of the plant
Check before start-up that all water and
electric connections are done as described in
previous chapters and in compliance with
local regulations.
8.1 Start-up of softening plant
1. Check that the number (see encl.
diagram page 6) of the standard-
mounted regeneration meter disk fits
the actual hardness on site. If not, the
meter disk (water meter) must be
exchanged, see illustrations 2.1, 2.2
and 2.3 on page 5. You can order the
correct meter disk from BWT HOH or
your supplier.
2. The brine valve has been pre-adjusted
in our factory, but it should always be
checked that the float (A-figure 1) is
halfway up the shaft as a minimum
when looking from the top of the float.
The water must be above the grid plate
in order to be in contact with the slat.
This also applies to the yellow plastic
ring (B-figur 1) under the float; it must
be pressed home.
3. The valves on the in- and outlet side
and the bypass valve (if fitted) must be
closed.
4. Open the valves at the intake side a
little so that the filter slowly fills

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withwater. At the same time water will
be filled into the brine tank by means
of the brine valve.
5. Put the one and then the other tank in
backwash position ofr a while to get
any air out of the system. This is done
by pressing down the crosshead screw
in the middle of the automatism and
simultaneously turning it clockwise.
Check that this makes the water run out
the discharge hose to drain.
6. When the air is out, put the filter in
operation (at position 12 or 6 o´clock)
by turning the crosshead screw once
more.
7. Then open the valves on the outlet and
intake sides completely.
8. Check that water runs into the brine
tank. Check that the water is above the
grid plate (approx. 5 cm above).
9. Fill up the tank with BWT HOH salt
tablets.
10.Normally there shall be enough salt in
the cabinet to cover the water
completely.
11.Now the plant is ready for service and
will supply softened water instantly.
8.1.1 Replacement of regeneration meter
disk
Remove the top cover of the automatism fig.
2.1 (bolt with hexagon head SW AF ¼”).
Take out the plastic mushroom together with
the O-ring and the spring fig. 2.1
When taking out the existing meter disk take
care not to remove or move other parts in the
control element.
When installing the new meter disc, push the
top blocking device (catch) aside with a small
screwdriver. See fig. 2.2
Replace the spring and the plastic mushroom
with the O-ring fasten the cover. The pin
protruding from the underside of the cover
must be at position 5 o´clock see fig. 2.3.
Press the cover back in place –If the cover
cannot be pushed home manually –check if
all pins/parts have been placed correctly.
Wrong fitting of the meter disc will cause the
plant to get operating trouble after a short
while and it will supply hard water.
Consequently, it is very important that this is
carried out with the greatest care.
Capacity I hardness degrees dH°/litre per
regeneration
Disc number
1
7°dH –2280 litre
2
14°dH –1140 litre
3
21°dH –760 litre
4
28°dH –570 litre (standard)
5
35°dH –456 litre
6
42°dH –380 litre
7
48°dH –325 litre
8
56°dH –285 litre
Before start-up, the softening plant must be
adjusted to the actual hardness in the raw-
water supply and then started up. This is done
by replacing the water meter disk, so that it
matches the actual hardness.
Slowly open the raw-water supply and close
the “by-pass” valve (encl. 14.2 Q fig. 2).
Check that all water connections are tight.

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Fill the salt tank with salt tablets. Use only salt
tablets and make sure that these are of a pure
quality, e.g. type BWT.
The soft-water plant is now ready for
operation. Check if the plant supplies soft
water on the soft-water check valve at the left
side of the cabinet. Test set is included. (see
instruction in the box).
Pull the permeat hose (encl. 14.2 A fig. 2) out
of the reservoir tank and lead it away from the
tank to a drain. Take care not to damage the
PVC fitting on the flow meter.
Open the outlet valve completely (encl. 14.2 I
fig. 2).
Now turn on the power supply.
Now the plant is operating.
Check that the motor is running in the right
direction.
The plant must operate and flush to drain for
20-30 minutes to rinse out chemical residue
before readjusting the outlet valve.
After flushing, the outlet valve shall be
adjusted (encl. 14.2 I fig. 2) again.
8.2 Adjustment of outlet amount
The outlet amount must be adjusted at 25 %,
i.e. if the plant produces 400 l/h, 133 l/h
must be led to sewer. This adjustment is very
important to avoid the plant membranes from
getting damaged.
The plant is now adjusted at a capacity of
75/25, which means 75 % permeate and 25
% concentrate to drain. An easy way to check
this is by multiplying the permeate capacity by
1/3.
The outlet amount is measured by timing the
produced outlet water. E.g. if 300 litres of
permeate is produced per hour, you must
produce 100 litres to drain per hour which
corresponds to 1.67 l/min. This can be
checked with a measuring cup.
When the requested amount of outlet water
has been obtained, tighten the counter nuts on
the outlet valve, so that it is locked. It is
important that the outlet amount be checked
after the counter nuts have been tightened to
make sure that the valve has not moved. Both
counter nuts must be locked/tightened.
Important! The needle valve must be locked at
the prescribed outlet amounts. If the needle
valve is closed, so the outlet amount becomes
reduced, the plant membrane(s) will be
damaged.
NB! After the valves have been locked in
position, the plant must be started and
stopped 4-5 times, and then the flow must be
checked again and the valves readjusted if
necessary.
Check on the high-pressure manometer (encl.
14.2 E fig. 2) that it shows the correct
operating pressure.
Approx. operating pressure:
951-S 24 bar
952-S 19 bar
953-S 19 bar
Note that an operating pressure may vary at
different temperatures and capacities.
Now check the quality of the treated water on
the permeate hose (encl. 14.2 A fig. 2) to

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establish if the conductivity is below 20
µS/cm, this can be read on the conductivity
meter (optional equipment).
Fill the reservoir tank with treated water < 20
µS/cm.
Write operating data in enclosed operating
logbook (see encl. –Operating logbook).
1. Plant operating pressure –can be read
on the high-pressure manometer (encl.
14.2 E fig. 2).
2. Permeate capacity –can be read on
the flow meter (encl.14.2 F fig. 2)
3. Also write down raw-water pressure
and raw-water temperature in the
operating logbook.
The transport pump (encl. 14.2 G fig. 2) now
has to be deaerated. This is done by filling in
treated water through the filling hole (N figure
3) which is placed at the top of the pump
head. Dismount the plug and fill in treated
water until it overflows (approx. 3-4 litres) and
then insert the plug again. The pump is now
aerated and ready for operation. Pressure
switch and pressure tank are factory pre-set
and do not have to readjusted.
Note! The transport pump cannot be started
until the reservoir tank is completely full.
Wait until the reservoir tank is completely full.
Check that the level sensor (encl. H fig. 2)
automatically stops the plant when the
reservoir tank is full. NB: Do not touch the
level sensor.
Create a large consumption of treated water.
Check if the transport pump starts
automatically. Let the pump operate a while
with a large flow in order to get air out of the
pump housing. Check if the pump supplies
water and pressure. If it does not, try
deaerating it once more as described
previously.
When the transport pump has been approved,
close the consumption of treated water. Wait
for the transport pump to stop automatically.
Note! The transport pump does not stop until
10-15 sec. after the consumption has ceased
due to the built-in time delay in the control
box.
Once again create a consumption of treated
water and this time let the transport pump
empty out approx. 200 litres of the content in
the reservoir tank. Check if the RO plant
automatically starts and produces treated
water. This can be checked on the flow meter.
Check if the plant stops automatically by too
low raw-water pressure or lacking raw-water
supply. This is done by slowly closing the raw-
water supply while the plant is operating.
When the water supply has been stopped, the
plant shall stop automatically within 5 sec.
In order to put the plant back into operation,
the water supply must be re-established and
the plant power supply interrupted for 20 sec.
and then reconnected. The plant will again
automatically be in normal operation.
The plant is now started and ready for
operation.
9Automatic functions
The BWT PERMAQ Compact 950 plant is
equipped with a control box which has
following control functions integrated:
Level sensor for start/stop of the high-pressure
pump. Alarm low level.

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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

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For preservations lasting longer you must
check the organic growth. When protecting
against frost take care that the pH value never
drops to a value below pH 3. In that case
there is a risk that the bisulphite transforms into
sulphuric acid.
11 Replacement of membranes
Read this chapter before
dismounting/replacing the plant membranes.
Switch off the power and water to the plant.
Dismount the U-lock placed at the top of the
membrane pipe. (The U-lock holds the
membrane end plates in place).
Remove the split pin from the U-lock and pull
the U-lock out of the pipe.
Now pull the end plate out of the membrane
pipe by wriggling the end plate from side to
side and pulling at the same time.
Now pull the membrane out of the membrane
pipe.
Note! At which end the large, black O-ring is
placed inside the membrane. When the new
membrane is to be fitted, this o-ring shall be
placed at the same end of the membrane as
the old one.
When all connections have been refitted and
the end plates securely fastened with the U-
lock, the plant shall be restarted. See chapter
”Start-up of Plant”
Note in the operating logbook:
1. Date of replacement of membranes
2. New capacity of the plant (flow meter
FI1)(encl. 14.2 F fig. 2)
3. Water quality (µS/cm)
4. Plant operating pressure (manometer)
5. Raw-water temperature
6. Raw-water pressure.
12 CIP-cleaning of membranes
(OPTION)
Introduction
The plant is not equipped with a CIP unit as
standard however it is available as an option.
During normal operation, dependent on inlet,
water quality, temperature, operating
conditions etc. the RO membranes will
successively loose capacity due to the water’s
varying content of mineral salts, biological
matter, colloid particles and other insoluble,
organic particles.
These deposits will accumulate during
operation and cause an increased pressure
drop across the membrane and thus a
reduction in capacity and poorer water
quality.
Membranes must be CIP-cleaned at least once
a year or immediately when the capacity has
dropped 10 % compared to original capacity.
In this connection it should be noted that the
capacity drops by lower water temperatures
(approx. 3 % per °C-). If this is the case, a CIP
cleaning is not necessary.
Conditions:
It is necessary to perform CIP cleaning with
chlorine-free water of a good quality and a
temperature of approx. 55 °C. We
recommend using permeate on this plant,
however pre-treated soft water may also be
used.
During circulation of cleaning agent in the
membranes, the temperature may never

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exceed 35 °C and the pH value must be kept
between 2 and 11.5.
The flow direction during CIP cleaning must be
the same as during operation.
BWT CIP 4 is an acid cleaning agent used for
dissolving inorganic deposits including iron,
whereas the alkaline cleaning agent BWT CIP
10 is used for dissolving organic deposits
including oil.
Always start by using BWT CIP 10 and then
use BWT CIP 4. Follow the manufacturer’s
safety directions concerning handling of
dangerous chemicals.
BWT CIP 4 is sold by BWT HOH
Article number: 701957020
BWT CIP 10 is sold by BWT HOH
Article number: 701957010
Never use sulphuric acid H2SO4 for CIP
cleaning as there is then a risk of precipitation
of gypsum (calcium sulphate).

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13 Technical data
BWT PERMAQ Compact 950
Unit
951-S
952-S
953-S
Capacity
l/h
400
600
800
Max recovery
%
80
Salt reduction
%
98
Conductivity
µS/cm
<20
Reservoir
litre
500
Electric connection
V
400
Max. power consumption
kW
3,5
Electric frequency
Hz
50
Fuse
A
16
Pipe inlet diameter
“
¾
Concentrate outlet diameter
“
¾
Permeate outlet diameter
“
¾
Height
mm
1360
Length
mm
1580
Depth
mm
680
Max. water temperature
°C
25
Raw water pressure (min / max)
bar
3 / 7
Weight (dry)
kg
300
Weight (full)
kg
900
Number of membranes
pcs.
1
2
3
High-pressure pump
MTR3-26/26
Transfer pump
CM3-5
Softening unit
SK-613

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14 Technical specifications
Discharge end with fittings for
membrane pipe
BWT 4” end cap
Material: PVC
RO membranes
BWT membrane
1-3 pcs.
Membrane delivery pipe: Vinylester/fibreglass
High-pressure pump
Pump: Grundfos MTR3-26/26
Operating pressure: 12,6 - 17,2 bar
Power: 2,2 kW, 3x400 V, 50 Hz
Transport pump
Pump: Grundfos CM3-5
Operating pressure: 3,4 –4,59 bar
Capacity: 3,1 m³/h
Power: 0,65 kW, 3x400 V, 50 Hz
Safety pressure switch –inlet
Suco 0,5 bar
Pressure switch –outlet
Danfoss switch, stop at 4,0 bar –start at 3,0 bar
Reservoir
Volume approx. 500 l
Material: plastic PE (FDA approved)
Pressure tank
Volume 2 litre stainless steel, pre-pressure 2,9 bar.
Solenoid valve
Danfoss “Evsit 12”, 230 V, 50 Hz
Control unit
BWT electrical control unit
Ejector
Ellehammer 2.5/4.5
Level switch
BWT level switch
Material: PVC
Noise level
<70 dB (A)
Softening unit
SK 613
Quantity-controlled
Capacity: 20l/min. continuously
Max. hardness: 30° dH
Salt tank
Integrated, 100 litres

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15 Appendix

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15.1 Survey of Alarm Conditions
LED functions: During normal operation the LED’s are lit corresponding to the components they
represent.
“Re-start ALARM” on TP-pump:
(Nothing is working –permanent
condition)
Check thermal relay
in control box
ALARM –High water level:
(Nothing is working –permanent
condition) OPTION
ALARM –Low water pressure and
low water level:
(Nothing is working –permanent
condition)
Restore raw-water
pressure to >0,5 bar,
then check why water
level is low
Low water level (no ALARM):
(TP stopped –HP working)
“On-time ALARM TP pump”
(Nothing is working –permanent
condition)
ALARM –Low raw-water pressure.
(Nothing is working –permanent
condition)
Low raw-water pressure
(HP pump stopped –TP pump
working)
Automatic restart (3
times) if raw-water
pressure is <0,5 bar
External stop –TP pump, can be
jumped at start-up.
(HP pump is working)
Check the reason for
the external stop and
rectify the fault
External stop –HP pump
(TP pump is working)
Check the reason for
the external stop and
rectify the fault
Alarm
Level
Transport
pump (TP)
High-pressure
pump (HP)
Inlet
Power
Description
Trouble-
shooting /
comments
LED’s are lit
LED’s flashes slowly (½ Hz)
LED’s flashes rapidly (5 Hz)
BWT PERMAQ Compact emits beep tone at ALARM condition (Nothing is working), which can only
be neutralised by rectifying the fault, then switching the plant OFF for 5 seconds and switching ON
again.

EN
19
DEL / ON 15 SECONDS
ALARM / ON STOP AFTER 20 MINUTES
2 / ON 20 SECONDS START MAX. 60 PR. HOUR
16
32
MODEL / ON RO-950
DEL / OFF 5 SECONDS
MODEL / OFF RO-41
ALARM / OFF NO ALARM
4 / ON 20 SECONDS START MAX. 90 PR. HOUR
6 / ON 30 SECONDS START MAX. 109 PR. HOUR
1
ON
24
3568
7
FACTORY SETTING
15.2 Settings
It is possible to adjust the various time settings for start, Stop and Alarm, plus insert a start-up delay
of the pump.
Use of DIP-switch:
No. 1 High-pressure pump
No. 2 Transport pump
No. 3 Selection of RO model
No. 4-6 Transport pump
DIP-switch
F4 –Thermal relay
(HP pump)
F5 –Thermal relay
(TP pump)
ON/OFF
switch
F3 –Fuse (TP pump)
F2 –Fuse (HP pump)

EN
20
15.3 Trouble-shooting
15.3.1 Plant capacity has dropped
15.3.2 Treated water quality is higher than 20 µS/cm