Glow-worm Flexicom hx - Manual (Page 15)

0020107230_04 - 12/14 - Glow-worm
INSTALLATION
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• Where possible keep the existing boiler/circulating pump in
place when fl ushing the system
5.6.2 Flushing the system
• Fill the system with cold water and check for leaks.
• Open all drain cocks and drain the system.
• Close drain cocks and add a suitable fl ushing agent (cleaner)
compatible with Aluminium at the correct strength for the
system conditions in accordance with the manufacturer’s
instructions.
Examples of suitable fl ushing agents/cleansers are:
Sentinel X300, X400
Fernox F3
• Circulate the fl ushing agent before the boiler is fi red up.
• Run the boiler/system at normal operating temperature as
directed by the manufacturer of the fl ushing agent.
• It is essential to drain and thoroughly fl ush the whole system
to remove the fl ushing agent and debris.
• It may be necessary to use a power fl ushing machine to aid
the cleansing procedure in some circumstances.
• Close the drain cocks and refi ll with fresh water and a
suitable inhibitor.
• Vent any air from the boiler and system.
5.6.3 Inhibiting the system
Add a suitable inhibitor or combined inhibitor/anti-freeze, if the
system is exposed to freezing conditions, to the heating system
in accordance with the DWTA code of practice and inhibitor
manufacturer’s guidelines.
Examples of suitable inhibitors are:
Sentinel X100
Fernox protector F1
Artifi cially softened water must not be used to
fi ll the central heating system.
Sealing agents - The addition of sealing agents
to the system water is not permitted as this can
cause problems with deposits left in the heat
exchanger.