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3.0
System Details - Page 6
3.1 Water Circulating Systems
1. The appliance is suitable for open vented systems which
are either fully pumped or pumped central heating with
gravity domestic hot water.
2. An optional overheat thermostat kit is available where
additional control protection is required and for sealed
system applications. This must not be used on gravity
systems.
3.
The following conditions should be observed at all
times:
•
The static head must not exceed 30m (100ft)
of water.
•
The boiler must not be used with a direct
cylinder.
•
Drain cocks should be fitted to all system low
points.
•
All gas and water pipes and electrical wiring
must be installed in such a way that they do
not restrict the servicing of the boiler.
•
Position isolating valves as close as possible
to the circulating pump.
3.2 Treatment of Water Circulating Systems
For optimum performance after installation, this boiler and its
associated central heating system must be flushed in
accordance with the guidelines given in BS7593: 1992
“Treatment of water in domestic hot water central heating
systems”. This must involve the use of a proprietary
cleanser, such as BetzDearborn’s Sentinel X300 or X400, or
Fernox’s Superfloc.
Full instructions are supplied with the products, but for
immediate information please contact BetzDearbom (0151
420 9563) or Fernox (01799 550811).
For long term protection against corrosion and scale, after
flushing it is recommended that an inhibitor such as
BetzDearborn’s Sentinel X100, or Fernox’s MB-1 or Copal is
dosed in accordance with the guidelines given in
BS7593:1992.
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
the Baxi Helpline.
