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FA ROTEX GW - 09/2012
4 x Installation
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 PP-LAS pipes for increased
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 Hydraulic connection
The connections of the ROTEX GW are located on the bottom of
the unit. Any limescale which results from the water heating
process is flushed out of the stainless steel plate heat exchanger
in the hot water circuit.
Ɣ Observe implicitly the information regarding corrosion
protection in chapter 8.1.
4.6.1 Instructions for water connection
Ɣ For potable water lines, the stipulations of the EN 806 and the
national regulations for potable water installation that apply
additionally must be observed.
4.6.2 Water connection for heating and hot water
pipes
Ɣ Check the cold water connection pressure (maximum 10 bar).
– At higher pressure in the drinking water line, a pressure
reducer must be installed.
Ɣ The position and dimensions of the heating connections can
be found in fig. 4-2.
Ɣ To prevent heat losses, all hot water pipes must be insulated
against heat.
– Water shortage protection: The overheating protection of
the ROTEX GW safely shuts off the Gas condensing boiler in
case of lack of water (boiler water pressure < 0.7 bar) and
locks it. No additional water shortage protection is needed in
the construction.
– Avoid damages caused by deposits and corrosion: To
prevent corrosion products and deposits, observe the appli-
cable regulations of technology.
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.
Ɣ Optional: Connect the hydraulic connection kit (GWHYA1,
15 00 40) to the connections on the ROTEX GW.
Ɣ Connect the ROTEX GW to the cold water inlet.
Ɣ Connect the ROTEX GW to the hot water distributor network.
Ɣ Connect the ROTEX GW to the heating circuit.
– You must always ensure proper bleeding of the heating
circuit pipes.
CAUTION!
If the ROTEX GW 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.
Ɣ Rinse out the heat distribution network (in the
existing heating system).
Ɣ Install a dirt filter into the heating return flow
(SFR 28, 15 60 11 for units of up to 28 kW or
SFR 50, 15 60 12 for units of up to 50 kW).
CAUTION!
If the ROTEX GW is connected to a cold water line,
where steel pipes are used, swarf can go into the
stainless steel plate heat exchanger and remain there.
This can lead to contact corrosion damage and subse-
quently to leakage.
Ɣ Flush the feed pipes before filling the heat
exchanger.
Ɣ Install a dirt filter in the cold water supply.
WARNING!
There is a danger of scalding at hot water tempera-
tures over 60 °C. This is possible with installed solar
system (e.g. ROTEX Solaris) or if the hot water
nominal temperature is set to greater than 60 °C.
Ɣ Install a scald protection (domestic hot water
mixing construction (e.g. VTA32, 15 60 16)).
Fig. 4-12 Hydraulic connection kit GWHYA1 for standard wall connec-
tions (connections A - E see fig. 4-2)
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