For long-term corrosion protection, after flushing, an inhibitor suitable for stainless steel heat
exchangers should be used, refer to the current issue of BS 5449 and BS 7593 on the use of
inhibitors in central heating systems. Examples are Sentinel X100 and Fernox.
CAUTION:
It is essential that the cleanser is fully removed from the system after flushing and before
adding inhibitor. Take care to ensure that all low points in the system are fully drained.
Mixing additives with the heating water can result in ma-terial damage. However, up to now, no
incompatibility with Vaillant appliances has been detected with proper use of the following
products.
When using additives, follow the additive manufactur-er‘s instructions without exception.
Vaillant accepts no liability for the compatibility of any additive or its effectiveness in the entire
heating system.
Additives for cleaning purposes (subsequent flushing required)
● Fernox F3
● Jenaqua 400
● Sentinel X 300
● Sentinel X 400
Additives intended to remain permanently in the system
● Fernox F1
● Fernox F2
● Sentinel X 100
● Sentinel X 200
Additives for frost protection intended to remain per-manently in the system
● Fernox Antifreeze Alphi 11
● Sentinel X 500
Inform the operator of the necessary measures in case you have used any of these additives.
Inform the operator of the required procedures for frost protection.
Observe the applicable national regulations and tech-nical standards for the treatment of filling
and top-up water.
Provided the national regulations and technical stand-ards do not specify any higher
requirements, the follow-ing applies:
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