Scope Of Delivery; Model Variants; Installation; Installation Instructions - BWT AQA therm HFB1717 BA Einbau- Und Bedienungsanleitung

Ensure that there is a minimum 610 mm installation
height from the ground to the middle of the pipe for
safe and secure cartridge replacement.

5. Scope of delivery

The AQA therm HFB-1717 BA comprises:
- Integrated shut-off ball valve on both the inlet and
outlet sides.
- BA type backflow preventer with drainage con-
nection, backflow preventer core, integrated filter
on the inlet side, backflow preventer on the outlet
side and three metering points with sealing plugs.
- Pressure reducer with pressure gauge
- Insulating shell
The AQA therm HES comprises:
- Water meter on the inlet side with digital dis-
play and electronics for configuring the water
data and controlling the cartridge capacity.
- Vent or release valve: distilled water filling point
(non-potable water!)
- Shut-off ball valve on the outlet side
- Insulating shell
- Dummy plug/flushing plug
- separately available: flushing/dummy plug
(Art.-no. 084154) and filling adapter (Art.Nr.
084958)

6. Model variants

AQA therm HFB-1717 BA = standard model: with
600 μm filter (variant in Germany) or 25 μm filter
(variant in Austria).
AQA therm HES = standard model: HRC or SRC
cartridges must be ordered separately.

7. Installation

Please consult the installation manual when instal-
ling the system to comply with the applicable regula-
tions and general guidelines.

7.1 Installation instructions

- When installing in the feeder to the heating
system, mount the AQA therm HES on the wall.
- When installing in horizontal pipelines, the drai-
nage connection should be directed downwards.
- Installation must not take place in rooms or ducts
where toxic gases or vapours occur, and where
there is a risk of inundation (flood water).
- The installation location must be well ventilated.
6280_EBA AQA therm HFB_HES_HWG_313660-5.indd 17
- The installation location must be frost-resistant
and easily accessible for easy maintenance
and cleaning.
- The pressure gauge on the pressure reducer
must be highly visible for easy monitoring.
- First, install the AQA therm HFB-1717 BA in
the flow rate direction and then install the AQA
therm HES immediately after it.
- During installation, please comply with natio-
nal installation regulations.
7.2 Installation
The AQA therm HFB-1717 BA should be connected
as close as possible to the supply line to prevent
water from stagnating!
Tighten plastic sealing plugs manually only (do not
use tools).
1. Flush the pipeline thoroughly.
2. Installing the AQA therm HFB-1717 BA:
- When Installing in horizontal pipelines, the
drainage connection should be directed
downwards
- Observe the flow rate direction (direction of arrow)
- Avoid tensing and twisting during installation
3. Connect the drainage pipe to the drainage
connection (plastic pipe HT 40).
4. Install the AQA therm HES immediately after
the AQA therm HFB-1717 BA and mount using
the wall bracket.
- When installing in horizontal pipelines:
- Observe the flow rate direction (direction of arrow)
- Avoid tensing and twisting during installation
5. Please allow a 'damping zone' of at least
50 cm between the AQA therm HES and the
connection to the heating system.
6. Screw the AQA therm hardness-reducing
cartridge (HRC) or desalination cartridge (SRC)
(both are available optionally) into the AQA
therm HES and tighten manually.

7.3 Application

The AQA therm HFB-1717 BA is used to fill and refill
closed heating systems in accordance with DIN EN
12828:2003 and, with the relevant BA backflow
preventer, stops heating water of category 4 liquids
(with inhibitors) flowing back into the drinking water
system. If the drinking water is heated via the heating
system and category 4 or 5 liquids are present, any
components that come into contact with such must be
double-walled. Demineralised water corresponds to
category 2 pursuant to EN 1717 Annex B.
The AQA therm HES ensures that the heating system
is filled and refilled with softened or demineralised
water, as stipulated by VDI 2035 sheet 1 or Austrian
standard ÖNORM H 5195-1.
EN
17
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