System Details - Baxi Combi 24 HE Installation & Service Instructions Manual

10
6.0

SYSTEM DETAILS

6.1 Information
1. The Main Combi 24 HE Condensing Combination
Boiler is a 'Water Byelaws Scheme - Approved
Product'. 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 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 be suitable for aluminium and
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.
6.3 Bypass
1. The boiler is fitted with an automatic integral
bypass.
6.4 System Control
1. The boiler is designed for use in a heating system
that incorporates external controls, i.e. a minimum of
a timer device.
2. An integral electro-mechanical or electronic timer is
available as an optional extra.
3. For optimum operating conditions and maximum
economy the fitting of a programmable thermostat is
recommended.