BLUEHELIX TECH RRT 24 H
160
EN
cod. 3541C661 - Rev. 00 - 10/2018
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 addi-
tives guarantees that they are suitable and do not cause damage to the exchanger or other components and/or mate-
rials of the boiler and system. Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in
heating systems and compatible with the materials of the boiler and system.
System water characteristics
B
BLUEHELIX TECH RRT 24 H
boilers are suitable for installation in heating systems with non-significant 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. underfloor systems without antidiffusion pipes or open ves-
sel), 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 treat-
ed with suitable chemical conditioners against the initiation of corrosion, that are not aggressive on metals and
plastics, do not develop gases and, in low-temperature systems, do not cause proliferation of bacterial or mi-
crobial masses.
The water in the system must be periodically checked (at least twice a year during the season when the sys-
tems are used, as required by UNI8065) and have: possibly a clear appearance, 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 sys-
tems, specific biocides for use in heating systems.
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 require-
ments as set out above and provided for by Standard UNI 8065.
In the presence of adequate chemical/physical system and feed water treatments and related high cyclicity
controls able to ensure the required parameters, for industrial process applications the product can be installed
in open-vessel systems with vessel hydrostatic height able to ensure compliance with the minimum operating
pressure indicated in the product technical specifications.
The presence of deposits on the boiler exchange surfaces due to non-compliance with the above re-
quirements will involve non-recognition of the warranty.
