INSTALLER
21
INSTALLATION IN OLDER SYSTEMS AND SYSTEMS REQUIRING MODERNISATION
When installing
RESIDENCE COLONNA CONDENS
boilers in old systems or systems requiring modernisation, always
perform the following checks:
b
The manufacturer declines all responsibility for damage caused by incorrectly constructed flue systems.
b
Flue pipes for condensing boilers must be made from special materials, different from those used for stan-
dard non-condensing boiler flues.
b
Use only products that do not corrode aluminium to flush out the system.
- Make sure that the flue is able to withstand the tem-
perature of flue gases from a condensing boiler, and
that it has been designed and made in compliance
with applicable standards. The flue must also be as
straight as possible, sealed, insulated and not blocked
or choked. Finally, the flue must be fitted with adequate
condensate collection and drainage systems.
- Make sure that the electrical system has been installed
by a qualified electrician in compliance with applicable
standards.
- Make sure that the gas feed line and any LPG storage
tank are made and installed in compliance with appli-
cable standards.
- Make sure that expansion vessels are big enough to
contain the additional volume generated by thermal
expansion.
- Make sure that the flow rate and useful head of the
pump are suitable for the characteristics of the central
heating system (see page 12).
- Make sure that the circuit has been flushed out to remo-
ve all sludge and lime scale, and has been bled and
seal tested.
- Make sure that the boiler’s condensate drain system
(siphon) is properly connected to a domestic water
drain.
- Make sure that a suitable water treatment system is
installed if the quality of the supply/recirculation water
so demands. (Refer to the reference values listed in the
table alongside.)
REFERENCE VALUES
PH
6-8
Electrical conductivity
below 200 mV/cm (25°C)
Chlorine ions
below 50 ppm
Sulphuric acid ions
below 50 ppm
Total iron
below 0,3 ppm
Alkalinity M
below 50 ppm
Total hardness
below 35°F
Sulphur ions
below
Ammonia ions
none
Silicon ions
below 30 ppm
