Saunier Duval Thema CONDENS F 18 E SB, Инструкция по использованию, установке и обслуживанию, Страница: 18 / 54

Installation and servicing instructions strictly reserved for qualifi
ed gas installers
17
must not be taken as overriding statutory
requirements.
If the appliance is to be installed in a
timber frame building it should be fitted
in accordance with the Institute of Gas
Engineers document IGE/UP/7/1998. If
in doubt seek advice from the local gas
undertaking or Saunier Duval.
5 Appliance installation
All the dimensions in this chapter are
expressed in mm.
5.1 Recommendations before
mounting
5.1.1 Domestic hot water circuit design
The circuit should be designed to avoid
any unnecessary flow losses (decrease
the number of elbows).
The boiler will operate with a minimum
supply pressure but with a low flow.
Optimum performance will be achieved
with a pressure of 1 bar.
5.1.2 Heating circuit design
The Thema CONDENS boilers can
be used for any kind of installation: serial
or derivated double tube, single tube, hot
floor, etc...
Heating surfaces can be made up with
heaters, convectors or unit heaters.
Warning: We advise you to add an
inhibitor to the heating circuit water
(according to the manufacturer’s
recommendations) to avoid gas production
and oxide formation.
The pipework sections should be fixed by
using the following flow/pressure curve
(see chapter “Heating circuit adjustment”).
The system will be calculated according
to the flow corresponding to the power
that is really required without taking into
account the maximum power that the
boiler can supply. Nevertheless, we advise
you to have a flow big enough so that the
temperature difference between outgoing
and return is under or equal to 20°C. The
minimum flow rate is indicated in the
chapter “Technical Data” at the end of this
instruction manual.
The piping route should be designed in
such a way that it avoids any air locks
and make purging of gas from the system
easier. Bleeders should be placed at each
high point of the system as well as on any
radiators.
Total water volume accepted by the
heating circuit depends, amongst
other things, on the cold static load.
The expansion tank fitted in the boiler
is delivered set in plant (see chapter
“Technical Data” at the end of this
instruction manual). At commissioning, it is
possible to change this pressure in case of
a more larger static load. We advise you
to provide a drain valve at the lowest point
of the system.
If thermostatic radiator valves are used,
we advised you not to fit in a room where
a room thermostat is fitted.
If the boiler is not immediately installed,
protect all the pipe fittings so as to
avoid that any plaster element or paint
could impede the connection.
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