lining chimney
.
- Wet wood fuel being used.
Dry and season wood well
before burning it. See section on fuels.
- The return water temperature being too low.
To minimise
the possibility of condensation, always allow your
FRANCO BELGE
to warm up slowly and never operate the
circulating pump until the system is heating with the return
tempera tur e no m or e tha n 15° C b elow the flow
temperature and in any case, no less than 50°C
.
If condensation still persists, allow the fire to burn slowly
for a full 24 hour period heating the domestic hot water
only. Then try the pump again.
If the return temperature is always 20°C below the flow
temperature with the pump on, it is likely that the 4 way
mixing valve is not being used correctly. This indicates that
insufficient hot water is being directed into the return.
Condensation normally appears only when the system is
first used and sometimes at the beginning of the winter
season when the heating is first put on. In both cases,
allow the heat to build up very slowly and condensation will
be kept to a minimum or not experienced at all.
Continual condensation will reduce the life of the water
jacket and invalidate your guarantee. It should therefore be
avoided at all costs.
If condensation occurs after the pump has been turned on,
this will be due to the heating circuit cooling the system too
quickly. The solution is to switch off the pump, allow the
system to reheat fully and turn on only half the radiators
when the pump is switched on. Gradually, turn on the
remainder of the radiators, one by one, allowing plenty of
time for the return water to keep up temperature.
E
¤ Insufficient air entering kitchen
- See section “Positining the appliance”.
F
¤ Restriction in flue
þ
- Apparent if the appliance has normal flue draught and
reaches temperature quickly but smokes when being
loaded or when a large volume of air is admitted to the fire
(e.g. when ash pan door is opened).
The restriction may be a fall of soot or masonry in which
case, chimney sweeping should cure the problem .
Alternatively, the problem may be caused by too many
bends which are too acute in the chimney construction.
G
¤ Fuels
- See section “Fuels”.
H
¤ Operator error
- By this, we mean that it may be that you need a little more
time to get used to your appliance.
- However, if you still have problems after persisting for
some time, please contact your dealer.
I
¤ Chimney construction
þ
- The chimney’s construction must comply with Current
Building Regulations.
- An inadequately insulated chimney will allow rapid
cooling of the flue gases, causing excessive deposits in
the chimney which will lead to condensation and
eventually smoke emission from the appliance.
J
¤ Rate of burning
- All Franco Belge appliances are designed to be efficient
when burning slowly but they must be burned hot for 30
minutes after each slow burning period to prevent a
residual build up of tar/soot in the flue ways (normally this
would be achieved during cooking). However, you must not
operate your Franco Belge at maximum output for
excessively long periods.
K
¤ Thermostat failure
þ
- Whilst it is highly unlikely that the thermostat would fail,
it is a possibility that should be investigated once the other
likely causes have been looked into.
- Contact your dealer.
Document n° 343-4EN ~ 10/11/1998
Solid fuel boilers 921 series
Grillon - Buchère
26
Technical manual
