Water Connection - Rotex A1 BG Installation And Maintenance Instructions Manual

Additional kits
– Flue gas connection to a duct system (rigid flue gas line
SET E or flexible flue gas line SET O)
– Flue gas connection for exterior wall line (SET G)
If necessary, additionally needed concentric LAS pipes for in-
creased roof or ceiling heights, single wall PP pipes for chimney
heights of more than 10 m or additional accessory components
must be ordered.

4.6 Water connection

The ROTEX A1 has a common flow and common return for the
heating circuit and storage tank filling. The connections are
placed on the rear of the unit (refer to fig. 3-2).
For maintenance, it must be possible to swing the boiler up with
the burner mounted. During installation of the flow and return
lines leading upwards, sufficient free space must be provided for
swinging the boiler up.
Instructions for water connection
CAUTION:
If the ROTEX A1 is connected to a heating system in
which the pipelines or heating elements are made of
steel or non-diffusion-sealed floor heating pipes,
sludge and shavings may enter the boiler and lead to
blockage, local overheating or corrosion damage.
Rinse out the heat distribution network (in the
existing heating system).
Install the sludge separator (SAS1,
in the heating return.
In accordance with EN 12828 you must install a safety
valve in the flow line, on or in the immediate vicinity of
the heat exchanger, with which you can limit the maxi-
mum permissible operating pressure in the heating sys-
tem. There should be no hydraulic blocking elements
between the heat generator and the safety valve.
Any steam or heating water which may escape must be
diverted by a suitable blow-off line with constant gra-
dient in a frost-protected, safe and observable manner.
A diaphragm expansion vessel of adequate dimensions
and pre-set for the heating system must be connected
to the return line. There should be no hydraulic blocking
elements between the heat generator and the dia-
phragm expansion vessel.
ROTEX recommends using, for the hydraulic con-
nection of the A1 BG, the safety group (SBG A1,
15 60 18) and the connection kit (VSA1,
15 48 22).
Connect the blow-off line to the safety over-pressure valve
and diaphragm expansion vessel in accordance with
EN 12828.
Connect the water for filling or refilling the heating system as
specified by EN 1717 to avoid contamination of drinking water
by backwash.
The line should be routed so that the upper half of the burner
chamber of the ROTEX A1 can be hinged open without any
problems after installation (fig. 4-10).
FA ROTEX A1 BGe - 02/2014
Fig. 4-9 Heating lines installing (Wrong) for legend see fig. 4-10
15 60 21),
1 Heating return line
2 Heating flow line
3 Gas connection corrugated
hose
Fig. 4-10 Heating lines installing (Right)
– Water shortage protection: The overheating protection of
the ROTEX A1 safely shuts off the condensing boiler in case
of lack of water and locks it. No additional water shortage pro-
tection is needed in the construction.
– Avoid damages caused by deposits and corrosion:
Observe the relevant regulations of technology to prevent
creation of corrosion products and deposits.
Measures for desalination, softening or hardness stabilization
are necessary, if the filling and top-up water have a high total
hardness (>3 mmol/l - sum of the calcium and magnesium
concentrations, calculated as calcium carbonate.
4 x Set-up and installation
4 Safety group SBG A1
5 Connection kit VSA1
17