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6.0
System Details - Page 9
6.1 Water Circulating Systems
1. The appliance is suitable for fully pumped sealed systems
only.
The following conditions should be observed on all
systems:
•
The boiler must not be used with a direct cylinder.
•
Drain cocks should be fitted to all system low points.
•
All gas and water pipes and electrical wiring must be
installed in a way which would not restrict the servicing
of the boiler.
•
Air vents should be fitted to all system high points.
•
An air rejection separator is recommended to ensure
correct operation of all appliance components.
6.2 Treatment of Water Circulating Systems
•
All recirculatory water systems will be subject to
corrosion unless an appropriate water treatment is
applied. This means that the efficiency of the system will
deteriorate as corrosion sludge accumulates within the
system, risking damage to pump and valves, boiler
noise and circulation problems.
•
When upgrading existing systems that exhibit evidence
of sludging, it is advisable to clean the system prior to
treatment in order to remove any sludge and reduce the
likelihood of these deposits damaging new components.
•
When fitting new systems flux will be evident within the
system, which can lead to damage of system
components.
•
All systems must be thoroughly drained and flushed out.
The recommended flushing and cleansing agents are
Betz-Dearborn Sentinel X300 or X400 and Fernox
Superfloc Universal Cleanser which should be used
following the flushing agent manufacturer's instructions.
•
System additives - corrosion inhibitors and flushing
agents/descalers should be suitable for aluminium and
comply to BS 7593 requirements. The only system
additives recommended are Betz-Dearborn Sentinel
X100 and Fernox-Copal which should be used following
the inhibitor manufacturer's instructions.
Failure to flush and add inhibitor to the system will
invalidate the appliance warranty.
•
It is important to check the inhibitor concentration after
installation, system modification and at every service in
accordance with the manufacturer's instructions. (Test
kits are available from inhibitor stockists.)
•
For information or advice regarding any of the above
contact the Baxi Helpline.
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