TEMPRA 24
23
Fig. 24h
Fig. 24i
8.
Install the inner metal fl ue into the outlet, up to
the wallplate fl ange mark.
9.
Lift boiler with fl ue in a place, engage inner and
outer fl ue, slide into position
9.
Make sure the inner fl ue is fully engaged in the fl ue
terminal, secure boiler with two nuts and washers,
secure bottom of boiler using two screws and
washers, re-fi t the fan and test.
3.06 Connecting the central heating
Connect to the relevant connections as indicated in fi g. 1.
Connect the pressure relief valve discharge pipe (15mm) to the outside of the building, where possible over a drain.
The discharge must be such that it will not be hazardous to occupants and passers-by or cause damage to external
electric components or wiring. The pipe should be directed towards the wall.
To ensure long life, the heating circuit should be correctly sized and fi tted with all the controls necessary to ensure
correct functioning and operation. The differential between the boiler fl ow and return pipes should not be more
than 20°C. You are advised not to use the boiler with return temperatures of less than 50°C in order to prevent
patches of condensation forming and having a corrosive effect on boiler components.
3.07 Water treatment
if water treatment is used Ferroli Ltd recommend only the use of Fernox or Sentinel water treatment products, which
must be used in accordance with the manufacturers instructions. For further information contact:
Fernox Manufacturing Co. LTD.
Sentinel Division
Cookson Electronics, Forsyth Road
Betz Dearborn LTD
Woking, Surrey, GU21 5RE
Widnes, Cheshire WA8 5351
Tel. 0870 8700362
Tel. 0151 424 5351
Note -
If the boiler is installed in an existing system any unsuitable additives must be removed by
thorough cleansing.
All systems should be cleansed according to B.S. 7593.
Note -
In hard water areas treatment to prevent lime scale may be necessary.
Note - It is important that the correct concentration of the water treatment product is maintained in accordance
with the manufactures instructions.
3.08 Filling
When cold, system pressure should be about 1 bar. If while running venting off of air dissolved in the water causes
the pressure of the central heating system to drop below 0,5 bar, the user must utilise a fi lling loop to bring it
back to the original value. During operation, water pressure in the boiler when hot should be about 1.5 - 2 bars.
After fi lling, always close and disconnect the fi lling loop.
Note -
If there is a possibility of air pockets forming in certain points of the central heating system fl ow and return
pipes, you are recommended to fi t an air vent valve at these points.
Note -
When the boiler is installed below the level of the central heating a system, single check valve should be
fi tted in the fl ow to prevent gravity circulation around the heating system.
