System Details - Benchmark MAIN Installation & Service Instructions Manual

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© Baxi Heating UK Ltd 2007

6.0 System Details

6.1 Central Heating Circuit
1. The appliance is suitable for fully pumped SEALED
SYSTEMS ONLY.
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 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.
Using, for example Betz-Dearborn Sentinel X300 or X400 or
Fernox Superfloc Universal Cleanser. They should be used
following the flushing agent manufacturer's instructions.
• System additives - corrosion inhibitors and flushing
agents/descalers should comply to BS7593 requirements, e.g.
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
Technical Enquiries.
6.2 Bypass
1. The boiler is fitted with an automatic integral bypass.
6.3 System Control
1. For optimum operating conditions, the heating system into
which the boiler is installed should include a control system.
2. Such a system will comprise of a timer control and separate
room or cylinder thermostats as appropriate.
3. The boiler should be controlled so that it operates on
demand only.
4. Operation of the system under control of the boiler
thermostat & TRV's only does not produce the best results.