Aga Ranges Berrington - Manual (Page 8)

PLUMBING
REGULATIONS
The plumbing must be in accordance with all
relevant regulations and practices. It must include a
gravity circuit with expansion pipe, open to the
atmosphere. The central heating will be pump-dri-
ven as with other types of boilers.
GRAVITY CIRCUIT
The gravity circuit consists of the domestic hot water
tank of 135 litres indirect cylinder, fixed in an upright
position, recommended for hot water storage and it
should be connected to the boiler by 28mm diame-
ter flow and return piping. The pipes should not
exceed 7.8 meters (25ft) in length and cylinder and
pipework should be fully lagged. The shorter the run
of pipe work the more effective the water heating.
There must be no gate valves on this circuit and it
must have an expansion pipe exhausting to atmos-
phere. Cylinder and pipe work should be lagged to
minimise heat loss.
This diagram illustrates the basic principal of water
heating systems and must not be regarded as a
working drawing.
WATER CIRCUIT TEMPERATURE
The return water temperature should be maintained
at not less than 40°C so as to avoid condensation on
the boiler and return piping. Fitting a pipe thermo-
stat to the return pipe of the gravity circuit and wiring
it into the pump control will ensure rapid circulation
of the hot water.
In some circumstances it may be possible to over-
heat the appliance and the water inside will boil.
This will be evident by the sound of a knocking noise
coming from the appliance and pipes around the
house. If this occurs close off all air controls and
manually start the central heating pump if fitted.
Opening the oven doors and hotplate covers will
help to release heat from the appliance. Be aware
that steam and boiling water will be expended from
any open vent from the heating system probably in
the roof space at the expansion tank.
In the unlikely event that the appliance is not oper-
ating in freezing conditions the water must be
drained from the boiler to prevent frost damage.
OPERATING INSTRUCTIONS
Never use gasoline or gasoline type lantern fuel,
kerosene, charcoal lighter fluid or similar liquids to
start or ‘freshen up’ a fire in this heater. Keep all
such liquid well away from the heater at all times.
Operate stove only with fuelling door and ashpit
doors closed. This heater is hot whilst in operation.
Keep children, clothing and furniture a safe distance
away.
INJECTOR TEE
Where the gravity and central heating circuits join
together to return to the stove we recommend the
use of an injector tee connection, situated as close
to the unit as possible. This type of tee encourages
a stable flow of water through both circuits and
helps to prevent priority being given to the stronger
flow, which is most commonly the pumped central
heating circuit.
Fig.9
7
PRIMARY AIR CONTROL
Fig.10
Setting 0: Closed
Setting 4: Maximum Heat
Rotate the knob to the required setting. The num-
bers are a guide only and experience will dictate the
desired setting for comfort. The numbers indicate
the degree of opening of the control flap from 0-4