27
SERVICING
To ensure continued efficient and safe operation of the
appliance, it is recommended that it is checked and serviced
by an Authorised Service Engineer at least once a year.
n
IMPORTANT:-
Flexible oil lines should be inspected at each and every
service visit. It is important in the interest of safety that
flexible lines are changed at regular intervals and should be
changed immediately in all the following cases:
1.
The oil line has been in use in the cooker for 3 years or
more.
2.
The date code on the oil hose shows as five years or
older. (whichever of the above comes first)
3.
The oil hose shows signs of being kinked or damaged,
irrespective of date life service span.
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 break-downs.
If in doubt, the user should consult an appropriately qualified
person such as a plumber or heating engineer.
SAFETY VALVE
A non-adjustable 3 bar safety valve must be fitted to the
primary flow pipe adjacent to the boiler connection ensuring
that any discharge will not create a hazard to occupants or
cause damage to electrical components or property.
A 15mm system by-pass must be fitted not less than 1.5
meters (4.9ft) from the cooker to allow correct water
circulation for the pump and to prevent condensation
forming in the boiler. This should be balanced. A heat sink
radiator / towel rail may be installed if desired in addition to
the By- Pass Loop. (See
)
NOTE
: We strongly advise the use of pipe lagging and also
the use of a frost thermostat if the installation is likely to be
exposed to situations where the temperature will dip to a
level consistent with frost.
The following diagrams illustrate the different types of central
heating systems to which this appliance can be connected,
but are not to be used as working drawings.
1.5m
By-pass not less than
1.5 meters from the cooker
Safety Valve
28mm Flow
Pipe
By-pass Lock
Shield Valve
28mm Return
Pump
Fig. 8.12
DESN 517994