Plumbing (Boiler Model Only); Regulations; Gravity Circuit; Injector Tee - Stanley GRAINNE Installation And Operating Instructions Manual

PLUMBING (BOILER MODEL)

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.
The installation of any electrical services during the
installation of this boiler and the associated heating
system must be carried out by a registered compe-
tent electrician and in accordance with the require-
ments of the latest issue of BS 7671.
The installation of the central heating system should
be in accordance with BS 5449: code of practice for
central heating systems for domestic premises.

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.
The domestic hot water cylinder should be to
BS1566:Part1.
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.

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.

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 flow pipe of the gravity circuit and wiring it
into the pump control will ensure rapid circulation of
the hot water.

PIPE THERMOSTAT

The fitting of a pipe thermostat to the flow pipe is
essential in order to activate the water circulation
pump when the water reaches the selected
temperature.
When the water temperature falls below the select-
ed temperature the pipe thermostat will cut off the
water circulation pump in order to allow the boiler to
recover.
Fig.11
Fig.10

OPERATING INSTRUCTIONS

COAL, ANTHRACITE, WOOD SYNTHETIC LOGS,
OR OTHER FUELS. "Never use gasoline" 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 fur-
niture a safe distance away.
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