14
PIPE THERMOSTAT
The fitting of a pipe thermostat to the common flow
pipe within 150mm (6”) of the cooker is
recommended in order to activate the water
circulation pump when water in the boiler reaches
60
o
C. This will ensure that return temperatures are
maintained and allow the pump to “run on” to transfer
any residual heat to prevent possible overheating.
(See fig. 18 & 19).
When the flow temperature falls
below this setting the pipe
thermostat will de-activate the
circulating pump and allow the
cooker to operate. (See Fig.18).
If a second optional pipe
thermostat is used see (S Plan
fig.19) then it should be fitted
within 8” of the cooker common
flow. It must be set at 85
o
and
wired to make temperatures rise
to activate the central heating
motorised valve should this temperature be
achieved, this will ensure that any excessive heat is
transferred from the boiler.
WATER CIRCUIT TEMPERATURE
The return water temperature must be maintained at
not less than 50
o
C so as to avoid condensation on
the the boiler and return piping. Fitting a pipe
thermostat to the flow pipe and wiring it into the
pump control will ensure rapid circulation of the hot
water to avoid premature burner shut down being
activated by the cooker thermostat when the central
heating circuit is in use.
INDIRECT DOMESTIC CYLINDER
The cooker must only be connected to an indirect
cylinder of recommended size of 180 litres using
28mm (1”) diameter flow and return piping. It is
recommended that the cylinder is lagged together
with pipework with runs in excess of 4 meters (13’).
NOTE
: One radiator (normally the bathroom) should
be selected for use as a heat sink, and connected to
open circuit only. (See Fig.11A).
GENERAL MAINTENANCE
It is important that the user is familiar with their
heating system and that they ensure regular checks
and maintenance which can limit unnecessary
breakdowns.
We recommend that you evaluate the overall
insulation in your house, i.e. attic, external walls,
window and external doors. Insulation and draught-
proofing can greatly reduce running costs while
equally enhancing living conditions.
DRAINING
Key-operated drain taps to B.S. 2879 should be
provided in an accessible position in all low parts of
the system. However, it should be noted that there
may be short sections of pipework, e.g. when
passing under doorways that may not be possible to
drain.
CARE FOR YOUR CENTRAL HEATING
SYSTEM
We strongly recommend the use suitable corrosion
inhibitors and anti-freeze solution in your heating
system, in an effort to minimise black oxide, sludge
and scale build-up, which effects efficiency.
In hard water areas the use of a suitable limescale
preventer / remover is advised.
Use only quantities specified by the water
treatment product manufacturer. Only add to the
heating system after flushing and finally refilling.
Refer to BS 7953.
SERVICING
To ensure continued efficient and safe operation of
the appliance, it is recommended that it is checked
and serviced by an Authorised Stanley Service
Engineer at least once a year.
Flexible oil lines should be inspected at each
and every service visit. There are varying types
of line with guarantee periods between 1 and 5
years. It is important in the interest of safety that
flexible lines are changed at regular intervals.
Inspect for date code stamp and if the line is out
of its guarantee period or shows signs of being
kinked or damaged, replace immediately.
Fig.18
INTERLINK SYSTEM
Fig.17
NOTE: BOTH THERMOSTATS MUST BE
CONNECTED TO MAKE ON TEMPERATURE RISE.
DONARD 60
COOKER
