BLUEHELIX MAXIMA
199
EN
cod. 3541U630 - Rev. 03 - 11/2020
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 connections to the respective points (see fig. 38, fig. 39 and fig. 40) and to the symbols
given on the unit.
Antifreeze system, antifreeze fluids, additives and inhibitors
When necessary, antifreeze fluids, additives and inhibitors can be used only if the manufacturer
of such fluids or additives guarantees that they are suitable and do not cause damage to the
exchanger or other components and/or materials of the boiler and system. Do not use generic an-
tifreeze fluids, additives or inhibitors that are not specific for use in heating systems and compati-
ble with the materials of the boiler and system.
System water characteristics
A
BLUEHELIX MAXIMA
boilers are suitable for installation in heating systems with non-si-
gnificant 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 µs/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.
Recommended chemical conditioners:
SENTINEL X100 and SENTINEL X200
FERNOX F1 and FERNOX F3
The unit is equipped with a frost protection system that activates the boiler in heating mode
when the system delivery water temperature falls below 6°C. The device is not active if the
power and/or gas supply to the unit is turned off. If necessary, for system protection use a
suitable antifreeze liquid that meets the same requirements as set out above and provided
for by Standard UNI 8065.
Summary of Contents for BLUEHELIX MAXIMA 24C
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