Charnwood FB100 Operating & Installation Instructions Manual - page 5
The Charnwood Flue Boiler provides a means of heating water by
utilising some of the flue heat to provide domestic hot water and
some radiator heating. This is achieved by circulating water through a
jacket around the flue, whilst slowing the flue gases to transfer the
heat.
The boiler is bolted directly to the top of the stove and has two 1in
BSP connections for flow and return water pipes. The flue contains
boiler chains which cause turbulence in the flue gases and improve
the transfer of heat to the water.
Fumes from blocked flues can kill. Remove the access door and brush
off the chain hangers at least monthly. See ‘Maintenance’ section.
Do not light the stove without water in the system.
SAFET Y WARNING
Do not light the stove if any part of the system is frozen.
There are some differences in operating the stove once a boiler has
been fitted. Before lighting ensure that all installation work has been
carried out according to these instructions, and that the chains and
the access door are securely fitted. Do not light the stove without
water in the system. It is important to allow time for the fire cement
to dry out before lighting - at least one day.
On initial lighting considerable condensation will be produced and this
will normally drip from the drip ring at the base of the boiler tube
onto the throatplate of the stove where it will evaporate. Some initial
sweating may occur at the joint between the boiler base and the flat
top of the stove, but this should cease after approx 2 hrs of
operating. If the sweating persists, this indicates an inadequate seal,
and the joint must be re-sealed. Start with a small fire and allow the
stove to heat up gradually so that the internal paint and fire cement
may cure evenly. When the stove and the boiler return pipe are both
hot, then all condensation should cease. When hot water is being
continuously used, then the stove should be well loaded and run at
such a rate that the return temperature does not fall below 40°C.
Once per month the access door must be unclipped and any soot
build up on the chain hangers brushed off with a small brush. Check
for any flue obstruction.
The chimney must be swept at least once per heating season, and the
boiler’s internal flue is cleaned at the same time. In order for this to
STOVE AND BOILER OPERATION
MAINTENANCE
Side Chain Hanger
Centre Chain
Hanger
Chains
Fig 1. Chain Access (access door removed)
happen, the boiler chains must first be removed. Ensure that the fire
is out and the stove is cold. Undo the clip on the back of the access
door, spring apart the two ends of the door and remove it from the
boiler. Unhook each of the chains from the hangers and allow them
to drop down onto the throatplate of the stove. Lift out the three
Chain Hangers. Remove the chains from above the throatplate, clean
them using a small brush The access door may now be replaced and
the chimney swept in the normal way through the stove. Remove the
access door again and and re-hang the chains on the hanger hooks.
When the hanger has had all its chains replaced, thread the lower
ends of the chains through the access opening, allow the ends to drop
down and manouevre the chain hanger back into its slots. It is easier
to replace the side hangers first, then the centre hanger. Replace the
access door and the stove is ready for re-lighting.
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OPERATING INSTRUCTIONS
5
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