BlueHelix ALPHA C
284
EN
cod. 3541U152 - Rev. 01 - 04/2021
use suitable guaranteed products for heating systems
(see next section), that do not harm metals, plastics or
rubber.
The manufacturer declines any liability for da-
mage caused to the generator by failure to properly
clean the system
.
Make the respective connections, paying attention to the symbols provided on the unit.
Frost protection system, antifreeze liquids, additives and inhibitors
If necessary, the use of antifreeze liquids, additives and inhibitors is allowed, only and exclusively
if their manufacturer guarantees that the products are suitable for use and do not cause damage
to the boiler’s heat exchanger.or other components and/or materials of the boiler and system. It is
prohibited to use generic antifreeze liquids, additives or inhibitors that are not expressly suitable
for use in heating systems and compatible with the materials of the boiler and system
System water characteristics
A
BlueHelix ALPHA C
boilers are suitable for installation in heating systems with non-signi-
ficant entry of oxygen (ref. systems "case I" EN14868). A physical separator (e.g. plate
heat exchanger) must be provided in systems with continuous entry of oxygen (e.g. under-
floor systems without antidiffusion pipes or open vessel), or intermittent (less than 20% of
system water content).
The water within a heating system must have the characteristics required by UNI 8065,
and comply with laws and regulations in force and the provisions of EN14868 (protection
of metallic materials against corrosion).
The filling water (first filling and subsequent replenishment) must be clear, with hardness
below 15°F and treated with suitable chemical conditioners against the initiation of corro-
sion, that are not aggressive on metals and plastics, do not develop gases and, in low-
temperature systems, do not cause proliferation of bacterial or microbial masses.
The water in the system must be periodically checked (at least twice a year during the se-
ason when the systems are used, as required by UNI8065) and have: possibly a clear ap-
pearance, hardness below 15°F for new systems or 20°F for existing systems, pH above
7 and below 8.5, iron content (Fe) below 0.5 mg/l, copper content (Cu) below 0.1 mg/l,
chloride content below 50mg/l, electrical conductivity below 200
μ
s/cm, and must contain
chemical conditioners in a concentration sufficient to protect the system for at least one
year. Bacterial or microbial loads must not be present in low temperature systems.
Only use conditioners, additives, inhibitors and antifreeze liquids declared by the producer
suitable for use in heating systems and that do not cause damage to the heat exchanger
or other components and/or materials of the boiler and system.
Chemical conditioners must ensure complete deoxygenation of the water, contain specific
protection for yellow metals (copper and its alloys), anti-fouling agents for scale, neutral
pH stabilizers and, in low-temperature systems, specific biocides for use in heating sy-
stems.
