Water Connection - Rotex HPSU compact 304 Installation And Maintenance Manual

4 x Set-up and installation
Install the ROTEX HPSU compact at the installation site.
– Recommended clearances (fig. 4-5):
From the wall (s1): 200 mm.
From the ceiling (X): 1200 mm, minimum 480 mm.
– Carefully transport the ROTEX HPSU compact, use the
handles.
– When setting up the unit in a cabinet, behind panels or in
other restricted conditions, sufficient ventilation (e.g.,
using ventilation gratings) must be ensured.
If necessary, install the optional Backup Heater (BUxx) in the
ROTEX HPSU compact (fig. 4-5).
Observe the assembly and operating manual supplied with
the accessory ( for tightening torque see chapter 10.3).
Fig. 4-5 Layout (shown on ROTEX HPSU compact 508/516 with incor-
poration of the optional Backup Heater)
18

4.3 Water connection

CAUTION!
If the ROTEX HPSU compact is connected to a
heating system with steel pipes, radiators or non-dif-
fusion-proof floor heating pipes, slurry and swarf could
enter the hot water storage tank and cause
blockages, local overheating or corrosion.
Flush the feed pipes before filling the heat
exchanger.
Rinse out the heat distribution network (in the
existing heating system).
Install the dirt filter or sludge separator into the
heating return flow (see chapter 2.5.5).
CAUTION!
If the ROTEX HPSU compact is connected to a cold
water line, where steel pipes are used, chips can
enter the special steel corrugated pipe heat exchanger
and remain there. This can lead to contact corrosion
damage and subsequently to leakage.
Flush the feed pipes before filling the heat
exchanger.
Install contamination filter in the cold water feed
(see chapter 2.5.5).
ONLY ROTEX HPSU COMPACT ... BIV
CAUTION!
If the heat exchanger for charging the pressurised
solar system (fig. 4-1 / fig. 4-2, pos. 8+9) has an ex-
ternal heating unit (e.g. wood-burning boiler) con-
nected to it, an excessive flow temperature at these
connections can damage or destroy the ROTEX
HPSU compact.
The feed flow temperature of the external heater
should be limited to max. 95 °C.
In accordance with EN 12828 you must install a safety
valve at or in the immediate vicinity of the heat
exchanger, with which you can limit the maximum per-
missible operating pressure in the heating system.
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 gradi-
ent 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 ROTEX HPSU compact. There should be no
hydraulic blocking elements between the heat genera-
tor and the diaphragm expansion vessel.
ROTEX recommends integrating a mechanical
manometer for the filling of the heating system.
For drinking water lines, comply with the EN 806 and DIN
1988 stipulations.
To avoid a circulation line, install ROTEX HPSU compact
close to the draw-off location. If a circulation line is absolutely
essential, it must be installed in accordance with the
schematics in chapter 9 "Hydraulic system connection".
FA ROTEX HPSU compact 4 - 06/2015