(d) Turn the thermostat control knob to the desired position
(see Fig. 2: temperature control).
(e) Your boiler will now commence a start sequence, in which a
pre-ignition period of approximately 15 seconds is followed by
a supply of atomised oil being introduced into the combustion
chamber. Ignition then occurs, followed by a post-ignition
period of approximately 20 seconds.
(f) Your boiler is now in a steady run condition and will remain so
until the water temperature reaches the temperature set on the
control thermostat. At this point the burner will stop and the
boiler will shut down. The sequence will continue until the
boiler is programmed - either manually or by an automatic
programmer - for a period of shutdown.
The temperature control knob gives you
control over the water temperature in your central
heating radiators, and you can adjust it to any
position within the indicated range (as shown in
Fig. 2).
Higher settings obviously mean hotter
radiators and rooms will reach the required
temperature quicker. The ideal setting varies from
property to property, and can only be established
by trial and error and experience: a setting of
medium to high should serve as a good initial
guide.
PLEASE NOTE: The control knob must not be
set below the first indicating bar.
HIGH LIMIT THERMOSTAT
Your boiler is fitted with a high limit cut out thermostat,
designed to protect the central heating system in the event of the
boiler running beyond a safe temperature level due to a control
malfunction. This is indicated by excessive operating
temperature and the mains power indicator lamp going off. The
thermostat will reset itself when the boiler cools to a safe
operating level.
TEMPERATURE CONTROL
SAFETY THERMOSTAT
The control knob has a range of adjustment as
indicated by the symbols.
Fig. 2.
TEMP
Low
Setting
High
Setting
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