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

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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 Baxi Helpline.
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.