System Details - Baxi Solo 2 PF Installation And Servicing Instruction

3.0 System Details – Page 7
3.1 Water Circulating Systems
1. The appliance Is suitable for use with open vent fully
pumped systems, sealed systems and where additional
control protection is required. The following conditions
should be observed on all systems:
•
The static head must not exceed 30m (100ft) of
water.
•
The boiler must not be used with a direct cylinder.
•
The boiler Is fitted with a timed pump overrun that will
operate for approximately 8 minutes.
•
Drain cocks should be fitted to all system low points.
•
All gas and water pipes and electrical wiring must be
installed in a way which would not restrict the
servicing of the boiler.
•
Position isolating valves as close to circulating pump
as possible.
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 in accordance with the guidelines given in BS
5793:1992 "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 (0151 420 9563) or Femox
(01799 550 811) directly.
•
For long term protection against corrosion and scale,
after flushing it is recommended that an inhibitor such
as BetzDearborn Sentinel X1 00, or Femox MB-1 or
Copal is dosed in accordance with the guidelines
given in BS 5793:1 992.
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 manufacturer's
instructions. (Test kits are available from inhibitor
stockists.)
•
For information or advice regarding any of the above
contact the Baxi Helpline.
3.2 Bypass Requirements
1. The boiler is fitted with a pump overrun device which
allows the removal of residual heat from the boiler.
NOTE: The pump overrun will operate for
approximately 8 minutes. The system design must
therefore, always provide an open circuit for water to
circulate between the boiler flow and return.
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