5
SYSTEM 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 ill cause the heating to s itch off before the room is
up to the correct required temperature. Al ays follo 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
bet een half an hour and an hour before becoming effective
and usually remain arm for up to half an hour after boiler
shut-do n. The timer can therefore be s itched off earlier as
an economy measure.
FROST PROTECTION
As the boiler ill be sited externally to the property being
heated, the ater may be in danger of freezing and, as such,
the appliance is protected by a factory-fitted frost thermostat,
hich ill cause the boiler to fire should the temperature
ithin the casings drop to belo 7°C).
If the system is shut do n for a long period during very cold
eather, it is also advisable to completely drain the system.
Ho ever, too frequent draining of the system should be
avoided, especially in hard ater areas, as this could lead to
scaling of the boiler ater ays.
See page 7 for flushing and ater treatment.
SHUTTING DOWN FOR THE SUMMER
If the boiler is shut do n 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.
Al ays ensure that the oil storage tank is topped up
regularly; do not ait until the tank is nearly empty before
refilling, as sludge and ater 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 it be allo ed to
settle in the tank for about half an hour before restarting the
boiler.
Sludge and ater caused by condensation should be dra n
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
follo ing checks before calling your service engineer:
1. Check for failure in the electrical supply.
2. Check for a blo n fuse. If the fuse has blo n and the
replacement subsequently blo s again, s itch 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 ater temperature (see high-limit
thermostat details, page 4, for further details).
Note: If the boiler has been shut do n due to a failure of the
po er supply, it may be necessary to reset the time-
s itch or programmer to the correct time, unless the
device has an in-built po er 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 an OFTEC-trained and registered engineer can carry
out commissioning and service ork.
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
arranty that an annual service is carried out.
5.
The system ater must al ays be protected by a corrosion
inhibitor.
