BWT AQA therm SRC-L Salt Reducing Cartridge Instruction Manual
- June 16, 2024
- BWT
Table of Contents
Fitting and operating instructions AQA therm SRC-L
AQA therm SRC-XL
Important notice: Always keep the fitting and operating instructions close at
hand to avoid any mistakes and before carrying out any work on the device you
should read the fitting and operating instructions carefully and follow them.
While our data sheets and brochures should provide advice to the best of our
knowledge, the content thereof is not legally binding. In addition to this,
our general terms and conditions of trade apply.
Subject to alterations!
Supplied with the product
- Salt-reducing cartridge AQA therm SRC-L or SRC-XL with hygienic cap
- SRC-L nameplate (service card)
Function
The standards for heating water quality in Germa-ny are subject to directive
VDI 2035 (see table 1} and in Austria to the Austrian standard (ONORM) H
5195-1 (see table 2}.
BWT recommends the sophisticated low conductivity technology for heating water
treatment.
The saltreducing cartridge integrated into the AQA therm HES reduces both
calcium and corrosion-in-ducing substances present in the water. In addition,
when using this water treatment process, the correct planning, installation
and operation of the heating system must be conform fo the relevant standards
and BWT specifications.
For refilling purposes only low conductivity water must be used.
Cartridge capacity
Determining the capacity Conventional method:
The capacity of the SRC cart-ridges depends on the con-ductivity of the water
to be treated. The overall hardness can also be used as a bench-mark. However,
this only applies to untreated water and not to (partially) softened water. In
this case, the reference must always be the conductivity or, as a guide, the
total hardness of the original untreated water (i.e. prior to softening}.
”Smart set-up”:
AQA therm HES generation 2016 with electronical dis-play.
The predefined hardness ranges for the smart setup apply to more than 90% of
applications. For water hardness levels of >26 °dH/46.3 °fH/463 ppm, log the
maximum water hardness.
Alternatively, a precise litre analysis can also be car-ried out – also of
course in all the intermediate areas – using the conventional method of
comparison with the capacity table.
If the cartridge capacity is defined using total hard-ness, a premature
depletion of the cartridge may occur when used with water containing a high
level of non-hardness minerals (e.g. sodium).
– Determining conductivity A conductivity meter (not supplied} can be used to
establish
the conductivity of the feed water prior to installing and when replacing the
cartridge to determine the cartridge capacity in accordance with table 1.
– Determining total hardness
With many types of water, total water hardness instead of conductivity can be
used to deter-mine the filter capacity {table 1). The total hardness test kit
(supplied) can be used to determine the total hardness prior to installing and
after replacing the cartridge.
– Alternatively, the local water utility can also provide information on water
hardness and conductivity.
Replacing a used cartridge
Conventional method:
For use with AQA therm HES analogue water meter display or precise tracking
of capacity with AQA therm HES electronics/generation 2016.
If the cartridge capacity is depleted in accordance with the capacity table
{if the volume of all the filte-red quantities in M2 are higher than the
maximum capacity M1}, it is time to replace the cartridge.
– Lock the flow at the intake (AQA therme HFB, valve Z) and the drain (valve
A).
– Use the bleed valve (E) to depressurise the cartridge.
– Unscrew the cartridge from the AQA therm HES.
– Dispose the used cartridges with the residual waste.
Smart set-up”: AQA therm HES generation 2016 with electronic display.
When the smart set-up detects that the cartridge capacity has dropped to lower
than 10 % of the ca-pacity, the service LED will flash yellow. When the
cartridge is fully depleted, the service display will flash red and emit a
beeping sound. (From factory sound is on press the info/on Button as often
ventil ,sound off” appears to turn the sound off.).
Installing a new cartridge
– Remove the cartridge from the packaging and check for any defects.
– Remove the hygienic cap from the cartridge.
– Screw the cartridge into the AQA therm HES.
– Conventional method:
Please complete the serial data
on the nameplate before filling or topping up.
– Smart set-up:
If the new cartridge is screwed into the AQA therm HES, the cartridge must be
logged in.
Press the SETUP/cartridge button to toggle between the various cartridges.
When replacing a depleted cartridge with a new one, please press the
SETUP/water hardness and SETUP/cartridge buttons for 3 seconds to reset the
cartridge capacity.
Filling and topping up
– Place a bucket underneath the cartridge.
– Open the bleed valve (E).
– Open the water supply (shut-off valve) on the inlet side and flush it in a
bucket using around 15 litres of water for the AQA therm SRC-L or around 25
litres of water for the SRC-XL.
– Close the bleed valve.
– Check the cartridge is watertight.
– Open the shutoff valve on the AGA therm HES and fill/top up the heating
system in accordance with the relevant standards.
Nameplate (service card)
The cartridge must be replaced when the service display on the AQA therm HES
(generation 2016) flashes red or if the quantity of the top-up water (M2, see
nameplate) exceeds the maximum capacity (M1 see table 1). The following
information must be en-tered on the nameplate, that has to be fixed to the
front of the cardiridge:
– maximum capacity (M1)
– water meter: initial value
– water meter: end value
– the resulting water consumption
Cartridge capacity table (Table 1)
Condudivity pS/cm| Alternative reference total hard-
ness °dH (untreated water)| SRC-L| SRC-XL
---|---|---|---
30| 1| 4.800| 9.750
60| 2| 2.400| 4.875
90| 3| 1.600| 3.250
120| 4| 1.200| 2.438
150| 5| 960| 1.950
180| 6| 800| 1.625
210| 7| 686| 1.393
240| 8| 600| 1.219
270| 9| 533| 1.083
300| 10| 480| 975
330| 11| 436| 886
360| 12| 400| 813
390| 13| 369| 750
420| 14| 343| 696
450| 15| 320| 650
480| 16| 300| 609
510| 17| 282| 574
540| 18| 267| 542
570| 19| 253| 513
600| 20| 240| 488
630| 21| 229| 464
660| 22| 218| 443
690| 23| 209| 424
720| 24| 200| 406
750| 25| 192| 390
780| 26| 185| 375
810| 27| 178| 361
840| 28| 171| 348
870| 29| 166| 336
900| 30| 160| 325
930| 31| 155| 315
960| 32| 150| 305
990| 33| 145| 295
1020| 34| 141| 287
1050| 35| 137| 279
1080| 36| 133| 271
1110| 37| 130| 264
1140| 38| 126| 257
1170| 39| 123| 250
1200| 40| 120| 244
Conductivity pS/cm| Alternative reference total hard-
ness °dH (untreated water)| SRC-L| SRC-XL .
---|---|---|---
30| 1| 4.800| 9.750
60| 2| 2.400| 4.875
90| 3| 1.600| 3.250
120| 4| 1.200| 2.438
150| 5| 960| 1.950
180| 6| 800| 1.625
210| 7| 686| 1.393
240| 8| 600| 1.219
270| 9| 533| 1.083
300| 10| 480| 975
330| 11| 436| 886
360| 12| 400| 813
390| 13| 369| 750
420| 14| 343| 696
450| 15| 320| 650
480| 16| 300| 609
510| 17| 282| 574
540| 18| 267| 542
570| 19| 253| 513
600| 20| 240| 488
630| 21| 229| 464
660| 22| 218| 443
690| 23| 209| 424
720| 24| 200| 406
750| 25| 192| 390
780| 26| 185| 375
810| 27| 178| 361
840| 28| 171| 348
870| 29| 166| 336
900| 30| 160| 325
930| 31| 155| 315
960| 32| 150| 305
990| 33| 145| 295
1020| 34| 141| 287
1050| 35| 137| 279
1080| 36| 133| 271
1110| 37| 130| 264
1140| 38| 126| 257
1170| 39| 123| 250
1200| 40| 120| 244
The precise capacity monitoring uses the values in the table compared to the
consumption value on the water meter on the AGA therm HES. The capacity of the
SRC cartridges depends on the conductivity of the water to be treated. The
overall hardness can also be used as a benchmark.
This only applies to untreated water however, and not to (partially) softened
water. In this case, the reference must always be the conductivity or, as a
guide, the total hardness of the original untreated water (i.e. prior to
softening).
BWT Austria GmbH
Walter-Simmer-Strafe 4
A-5310 Mondsee
Phone: +43/6232/5011-0
Fax: +43/6232/4058
E-Mail: office@bwt.at
BWT UK Limited
BWT House, The Gateway Centre
Coronation Road, High Wycombe
Buckinghamshire. HP12 3SU
Phone: +44/1494/838 100
Fax: +44 /1494/838 101
E-Mail: enquiries@bwt-uk.co.uk
BWT Nederland BV
Energieweg 9
NL2382 NA Zoeterwoude
Phone: +31/88/750 90 00
Fax: +31/88/750 90 90
E-Mail: sales@bwinederland.nl
www.bwt-group.com
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