Installation In Older Systems And Systems Requiring Modernisation; Water In Central Heating Systems - Riello ALUDOMUS SOLAR KV/200 20 ISC SOLAR Installation And Maintenance Manual

INSTALLER

2 .5 Installation in older systems and systems requiring modernisation

When installing these boilers in old systems or systems
requiring modernisation, always perform the following
checks:
− Make sure that the flue is able to withstand the
temperature of the combustion gases 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.
− Make sure that the flue is fitted with a conden-
sation drainage union.
− Make sure that the electrical system has been in-
stalled by a qualified electrician in compliance
with applicable standards.
− Make sure that flow rate, head and direction of
flow of the pumps are suitable and correct.
− Make sure that the fuel feed line and any storage
tank are made and installed in compliance with
applicable standards.

2 .6 Water in central heating systems

INTRODUCTION
Water used in central heating systems MUST be suitably
treated to ensure the correct functioning of those sy-
stems and to guarantee an extended working life for
boilers and all other system components.
This applies not only to existing systems but to newly
installed systems too.
Sludge, limescale and other contaminants in water can
cause irreversible damage to boilers even in relatively
WATER IN CENTRAL HEATING SySTEMS:
INSTRUCTIONS FOR THE DESIGN, INSTALLATION AND MANAGEMENT OF CENTRAL HEATING SySTEMS .
Chemical and physical characteristics of water
The chemical and physical characteristics of water used in central heating systems must conform to the requirements
of EN 14868 standard and to the following tables:
with furnace power < 150 kW
ph
Hardness °fH
Electrical
μs/cm
conductivity
Chlorides mg/l
Sulphides mg/l
Nitrides mg/l
Iron mg/l
(*) values for water in system after 8 weeks of functioning
General note on water used to top up systems:
− If softened water is used to top up a system, 8 weeks of functioning after topping up, verify that the water in
the system respects the above limits, in particular for electrical conductivity
− This check is not necessary if demineralised water is used to top up the system
ALUMINIUM BOILERS
Water with
Water used for
system ope-
first filling
rating (*)
6-8 7-8
< 10° < 10°
< 200
< 25
< 25
< 25
< 0,5
− Make sure that expansion vessels are big enough
to contain the additional volume generated by
thermal expansion.
− Make sure that the central heating circuit has
been flushed out to remove all sludge and lime
scale, and that it has been bled and seal tested.-
Make sure that a suitable water treatment system
is installed. (See the "Water in central heating sy-
stems" section.) Refer to the
details of specific products.
9
The manufacturer declines all responsibility for
damage caused by incorrectly constructed flue sy-
stems.
9
Flue pipes for condensing boilers must be made
from special materials, different from those used for
standard non-condensing boiler flues.
9
Use only products that do not corrode aluminium to
flush out the system.
short times, and despite the use of top quality materials
in their manufacture.
Contact R 's Technical Assistance Service for further
information on water additives and their use.
9
Always conform to the standards and legislation
applicable in the country of installation.
ALUMINIUM BOILERS
with furnace power > 150 kW
ph
Hardness °fH
Electrical
μs/cm
conductivity
Chlorides mg/l
Sulphides mg/l
Nitrides mg/l
Iron mg/l
34
R catalogue for
Water with
Water used for
system ope-
first filling
rating (*)
6-8 7-8
< 5° < 5°
< 150
< 15
< 15
< 15
<0,5