Final Check and Commissioning
38
EHC
Flushing existing systems
Where an old boiler is being replaced we recommend that the
boiler as dirt and debris from the old system may cause damage
to the boilers internal components, or the method below is
content is lost. This should be carried out using a Fernox Protector
11. Fernox Technical Services can be contacted on +44 (0) 870 870
0362 for further assistance.
followed.
Method statement for cleaning and treating existing domestic
systems
Cleaning and inhibiting an existing central heating installation
using Fernox Cleaner F3 and a Fernox Protector F1.
Procedure
water.
2. Add Fernox Cleaner F3 through a radiator using either a Fernox
Injector, Express or Superconcentrate at the recommended dose.
3. Turn on the appliance and circulate product for a minimum of
one hour hot or for a longer period of time if preferred.
4. Isolate all radiators except that furthest away from the appliance,
Repeat step 5 throughout the system including appliance and
circulator pipes.
5. Isolate all radiators except that furthest away from the appliance.
Open the full bore drain point; at the same time introduce fresh
Use a rinse test meter such as the Fernox TDS meter to ensure that
6. Repeat step 6 on all radiators, appliance and circulator pipework.
7. Re-open all radiators, and circulate for a further 15 minutes and
8. Once the system has been cleansed thoroughly, then add a
Fernox Protector F1, to the system. The product must be added as
per the manufacturer's instructions. This will protect against the
formation of scale, corrosion and microbiological growths. It is
9. The retreatment sticker provided with all Fernox Protectors
should be correctly completed and applied to the boiler casing.
the Total Dissolved Solids have been satisfactorily removed. The
system water value is within 10% of the mains water value.
removed cleanser residues will promote corrosion and negate the
cleaning process.
take a further TDS reading.
crucial, however, that for a Protector to work correctly, the system
10. Please note: we recommend Protector levels are checked on an
annual basis (usually during the service) or sooner if the system
test kit.
Flush through thoroughly until the water runs clear.
water via the temporary mains connection.
the boilers warranty.
Failing to follow theses instructions will invalidate
Note
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