5
SYSTEMS CONTROLS
ROOM THERMOSTAT
The room thermostat should not be positioned near a
source of heat, such as a radiator, or be exposed to direct
sunlight, as this will cause the central heating to switch off
before the room is up to the correct required temperature.
Always follow the manufacturer’s instructions for the best
siting position of the room thermostat.
TIME-SWITCH/PROGRAMMER
When choosing the operating times for your boiler, it is
useful to remember that central heating systems usually
take between half an hour and an hour before becoming
effective and usually remain warm for up to half an hour
after boiler shut-down. The timer can therefore be
switched off earlier as an economy measure.
FROST PROTECTION
As the boiler will be located externally to the property
being heated, the water in the system may be in danger
of freezing and, as such, the boiler is protected by a
factory-fitted frost thermostat, which will cause the boiler
to fire should the temperature within the casings drop to
below 7°C.
If the system is shut down for a long period during very
cold weather, it is also advisable to completely drain the
system. However, too frequent draining of the system
should be avoided, especially in hard water areas, as this
could lead to scaling of the boiler waterways.
See page 7 for flushing and water treatment.
SHUTTING DOWN FOR THE SUMMER
If the boiler is shut down for the summer months, it is
advisable to have it serviced and thoroughly cleaned as
soon as possible to minimise corrosion of the heating
surfaces.
OIL
The oil for your boiler is 28 sec. Kerosene class C2 to
BS 2869.
Always ensure the oil storage tank is topped up regularly;
do not wait until the tank is nearly empty before refilling,
as sludge and water could be sucked into the oil pipe,
affecting the operation of the burner and potentially
reducing the life of the pump.
After a delivery of oil, it is recommended that the oil is
allowed to settle in the tank for about half an hour before
restarting the boiler.
Sludge and water caused by condensation should be
drawn off at the drain-cock on the oil tank annually.
SIMPLE FAULT FINDING
If the boiler fails to start for no apparent reason, carry
out the following checks before calling your service
engineer.
1. Check for failure in the electrical supply
2. Check for a blown fuse. If the fuse has blown and the
replacement subsequently blows again, switch off
the mains electrical supply to the boiler and contact
your service engineer.
3. Check that there is adequate oil in the tank and that
all isolation valves are fully open.
4. Check for burner lock-out (see page 4).
5. Check for excess water temperature (see high-limit
thermostat details, page 4, for further details).
Note: If the boiler has been shut down due to a failure of
the power supply, it may be necessary to reset the
time-switch or programmer to the correct time,unless
the device has an in-built power reserve.
SERVICING
To ensure the efficient and reliable operation of the boiler
it is essential that the burner be commissioned
immediately after installation, and prior to first use. The
boiler requires an annual service thereafter.
IMPORTANT NOTES
1. Only a OFTEC-trained and registered engineer can
carry out commissioning and service work.
2. Electrical safety checks should be carried out by a
qualified electrical engineer.
3. It is the responsibility of the installer to ensure proper
commissioning is carried out.
4. It is a requirement of the guarantee and any extended
warranty that an annual service is carried out.
5. The system water must always be protected by a
corrosion inhibitor.
