14
4.6 Water Treatment
In the case of an existing system, it is ESSENTIAL that prior
to installing the new boiler the system is thoroughly flushed.
For optimum performance after installation of a new system,
the boiler and its associated central heating system should
also be flushed. Flushing should be carried out in accordance
with BS7593: 1992 using a cleanser such as Sentinel X300
or X400, Fernox Restorer or Salamander corrosion guard
cleaner.
For long-term corrosion protection, after flushing, a suitable
inhibitor should be used, refer to the current issue of BS
5449 and BS 7593 on the use of inhibitors in central heating
systems. Examples are Sentinel X100 Fernox Protector or
Salamander corrosion guard inhibitor.
4.7 Draining Points
Draining taps must be provided at the lowest points of the
system, which will allow the entire system to be drained.
Drain points for the appliance are provided at the positions
shown in diagram 4.3.
automatic bypass - fully open
automatic bypass - factory setting
automatic bypass - fully closed
pump speed 2pump speed 1
Remaining Conveyancing Capacity (mH2O)
0
1
2
3
4
0.5
1.5
2.5
3.5
4.5
5
900700500300100-100
150013001100
Litres/hr
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