4
x
Set-up and installation
●
Slide the retaining plate between the manifold and its
horizontal mounting and insert the manifold (fig. 4-22, item F)
back into its mounting through the middle hole of the retaining
plate.
●
Secure the manifold with stirrup (fig. 4-22, item G) in its
mounting again.
●
Insert the two connection couplings (fig. 4-22, item B) into the
lateral mountings through the retaining plate.
●
Secure the two connection couplings with stirrups (fig. 4-22,
item C) in their mountings.
●
Insert the sealing plug (fig. 4-22, item E) into the upper
mounting.
●
Secure the sealing plug with stirrup (fig. 4-22, item D).
●
Cut out side openings in the thermal insulation (fig. 4-23,
item A) using a suitable tool.
4.6.2 Connecting hydraulic lines
●
Check the cold water connection pressure (maximum 6 bar).
– If a higher pressure is present in the domestic water pipe,
a pressure reducer will need to be installed.
●
Establish hydraulic connections on the ROTEX
GCU compact.
– Position of the heating connections fig. 4-4 / fig. 4-6, con-
sult tab. 3-1 for sizes.
–
Comply with the stipulated tightening torque (see
chap. 12.3).
– Install the line in such a way that the protective cover of
the ROTEX GCU compact is simple to put on after assem-
bly.
– Connect the water for filling or refilling the heating system
as specified by EN 1717/EN 61770 to avoid contamina-
tion of drinking water by return flow.
●
Connect the blow-off line to the safety over-pressure valve
and diaphragm expansion vessel in accordance with
EN 12828.
– Any steam or heating water which may escape must be
drained by a suitable blow-off line with constant gradient
in a frost-protected, safe and observable manner.
– Install the line in such a way that the protective cover of
the ROTEX GCU compact is simple to put on after assem-
bly.
– Connect a suitably dimensioned and preset diaphragm
expansion vessel for the heating system. There may not
be any hydraulic blocking elements between the heat
generator and the safety valve.
– Position the diaphragm expansion vessel in an easily
accessible place (maintenance, parts replacement).
●
Carefully insulate pipework against heat loss and to avoid
condensation (insulation thickness at least 20 mm).
–
Water shortage protection
: The ROTEX GCU compact
pressure and temperature monitor switches the gas condens-
ing boiler safely off and locks it if there is a shortage of water.
No additional water shortage protection is needed in the con-
struction.
–
Avoid damage caused by deposits and corrosion:
Com-
ply with the requirements on the heating water (see
chap. 1.2.5.)
Fig. 4-22 Heating supply and return connections aligned to the rear
CAUTION!
If the stirrups cannot be put on properly, the couplings can be
detached from their mountings to ensure a very strong or
continuous escape of liquid can occur.
●
Before putting on a stirrup, make sure that the stirrup
engages in the coupling groove. To do so, insert the coupling
far enough into the mounting that the groove is visible
through the stirrup mounting.
●
Insert the stirrup up to the end stop.
Fig. 4-23 Cut-out in thermal insulation
The GCU compact is equipped with a pressure sensor.
The system pressure in monitored electronically and
can be displayed with the device switched on.
Nevertheless, ROTEX recommends installing a mechanical ma-
nometer between the GCU compact and the diaphragm ex-
pansion vessel, for example.
– Install the manometer so that it is easy to see when filling.
UK only!
CAUTION!
If filling or topping up the storage tank is done by means of the
boiler filling and drain valve, a temporary filling loop must be
used with the appropriate backflow prevention device in ac-
cordance with clause G24.2, Guidance to the Water Supply
(Water Fittings) Regulations 1999.
Содержание GCU compact 315
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