System Details - Baxi 124 Combi Installation And Service Manual

© Baxi Heating UK Ltd 2017

6.0 System Details

6.1 Information
1. The Baxi 100 range of Condensing Combination Boilers are
'Water Byelaws Scheme - Approved Products'. To comply with
the Water Byelaws your attention is drawn to the following
installation requirements and notes (IRN).
a) IRN 001 - See text of entry for installation
requirements and notes.
b) IRN 302 - Byelaw 14.
2. Reference to the WRc publications, 'Water fittings and
materials directory' and 'Water supply byelaws guide' give full
details of byelaws and the IRNs.
6.2 Treatment of Water Circulating Systems
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.
• BS7593 gives extensive recommendations on system
cleansing and water treatment.
• All systems must be thoroughly drained and flushed out
using an appropriate proprietary flushing agent.
• A suitable inhibitor must then be added to the system.
• All system additives (flushing agents, cleansers, inhibitors
etc.) must comply with the requirements of BS7593. Full
instructions are supplied with the products and for further
information contact the additive manufacturer directly or
consult their website.
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 inhibitor manufacturer. (Test kits are
available from inhibitor stockists.)
• For information or advice regarding any of the above
contact Baxi Customer Support 0344 871 1545.
6.3 Bypass
1. The boiler is fitted with an automatic integral bypass. Some
systems may require an additional external bypass.
6.4 System Control
1. Further external controls (e.g. room thermostat sensors)
MUST be fitted to optimise the economical operation of the
boiler in accordance with Part L of the Building Regulations
(2010). A range of optional controls are available. Full details
are contained in the relevant Sales Literature.
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