Spare Parts/Accessories - BWT AQA therm HFB-1717 BA Einbau- Und Bedienungsanleitung

11. Faults/finding faults
Fault
No or too little flow
Outlet valve opens for no reason
(no pre-pressure fluctuation
Drain valve does not close
Water seeping from the spring
cap
Adjusted back pressure remains
irregular
Water does not have the desired
hardness
* Note: the corrective measures marked with a * must be carried out by an installation company or by the
BWT customer service team. If the above-mentioned corrective measures do not achieve the desired outcome, an
installation company or the BWT customer service team must be commissioned with this task.

12. Spare parts/accessories

Description
AQA therm HFB-1717 BA System Separator
AQA therm HFB-1717 BA Pressure Regulator
AQA therm HRC S Hardness-Reducing Cartridge
AQA therm HRC L Hardness-Reducing Cartridge
AQA therm SRC L Hardness-Reducing Cartridge
AQA therm HES Water Meter
Fig. 270 D 1/4" Softening Valve
3329_EBA_AQA therm HFB/HES NEU.indd 15
Cause
AQA therm HFB-1717 BA not
mounted in the flow direction
Shut-off ball valves not complete-
ly open
Pressure regulators not set to the
desired back pressure
Integrated dirt trap contaminated Clean the dirt trap*
Inlet side backflow inhibitor or
outlet valve contaminated
Drain valve contaminated
Membrane valve insert defective
Nozzles or gasket valves conta-
minated or damaged
Mixing device incorrectly
adjusted
AQA therm hardness-reducing
cartridge (HRC) or salt-reducing
cartridge (SRC) spent
Trapped dirt particles in the
mixing unit openings
0.75 l
3.5 l
Corrective action
Mount the AQA therm HFB
1717 BA in the flow direction
(observe direction of arrow on
the casing)*
Completely open shut-off ball
valves
Set the back pressure
Dismantle, clean or replace the
cartridge insert*
Dismantle, clean or replace the
cartridge insert*
Attach a valve insert*
Replace valve insert*
Adjust softening
Exchange cartridge (HRC, SRC)
for a new one*
Exchange cartridge (HRC, SRC)
for a new one*
Flush cartridge (HRC, SRC)
Item number
810427
810428
812523
812524
812526
810426
880596
GB
15
29.02.12 10:34