System Details - Baxi Combi Instant 80e Installation & Servicing Instructions Manual

6.0 System Details

6.1 Information
1. The Baxi Combi Instant 80e and 105e 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 116 - Byelaw 90 and 91.
c) 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.
•
For optimum performance after installation this boiler and
its associated central heating system must be flushed. A
means of achieving this is by following the guidelines given in
BS 7593 "Treatment of water in domestic hot water central
heating systems".
•
This must involve the use of a proprietary cleanser, such as
BetzDearborn Sentinel X300 or X400, or Fernox Superfloc.
Full instructions are supplied with the products, but for
immediate information please contact BetzDearborn (+44
(0)151 420 9563) or Fernox (+44 (0)1799 550 811) directly.
•
For long term protection against corrosion and scale, after
flushing it is recommended that an inhibitor such as
BetzDearborn Sentinel X100, or Fernox MB-1 or Copa used.
The correct dosing is obtained by following the guidelines
given in BS 7593.
Failure to flush and add inhibitor to the system may
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's instructions.
(Test kits are available from inhibitor stockists.)
•
For information or advice regarding any of the above
contact the 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. Suitable timer kits are available as optional extras.
3. For optimum operating conditions and maximum
economy the fitting of a programmable room thermostat,
such as the Baxi Combi Controller, is recommended.
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