Faults/Troubleshooting; Replacement Parts/Accessories - BWT AQA therm HFB1717 BA Einbau- Und Bedienungsanleitung

11. Faults/Troubleshooting

Fault
Minimal or no flow rate
Drain valve opens for no reason
(no fluctuation in inlet pressure)
Drain valve does not close
Water leaking from the spring
cap
The set outlet pressure does not
remain constant
Water not hard enough
* Note: the corrective measures marked with * must be carried out by an installation company or by BWT's service team.
Should the corrective measures listed above fail to achieve the desired result, please contact an installation company or
BWT's service team.
12. Replacement parts / Acccessories
Description
AQA therm HFB-1717 backflow preventer using BA
AQA therm HFB-1717 pressure reducer using BA
AQA therm HRC S hardness-reducing cartridge
AQA therm HRC L hardness-reducing cartridge
AQA therm SRC L salt-reducing cartridge
AQA therm SRC XL salt-reducing cartridge
HES water meter
AQA therm distilled water filling nozzle
AQA therm HES filling adapter
Pressure gauge pressure reducer (HFB)
6280_EBA AQA therm HFB_HES_HWG_313660-5.indd 21
Cause
AQA therm HFB-1717 BA not
mounted in the direction of the
flow rate
Shut-off ball valve not fully open
Pressure reducer not set at the
required outlet pressure
Integrated filter is dirty
Inlet-side backflow preventer or
drain valve is dirty
Drain valve is dirty
Diaphragm valve core defective
Nozzle or gasket valve dirty or
damaged
Incorrect setting of the hardness
range
AQA therm hardness-reducing
cartridge (HRC) or desalination
cartridge (SRC) depleted
Impurities have entered the
mixing inlets
0.75 l
3.5 l
3.5 l
6.5 l
Removal
Mount the AQA therm HFB 1717
BA in the direction of the flow
rate (see the arrow direction on
the housing)*
Fully open the shut-off ball valve
Set outlet pressure
Clean the filter*
Remove backflow preventer core
and clean or replace*
Remove backflow preventer core
and clean or replace*
Insert valve core*
Replace valve core*
Set the correct hardness range
Replace (HRC, SRC) cartridge
with a new one*
Flush (HRC, SRC) cartridge
Item no. Austria Item no. Germany
810427 1-904115
081428 1-904792
812523
812524
812526
812510
810426 1-904793
084959 1-904794
084958
082428 1-904795
EN
12523
12524
12526
12510
11796
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24.09.15 09:09