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Combi 70 & Combi 90 Oil Boilers
1 - USER INSTRUCTIONS
About your boiler
1.1
Your Combi 70 or Combi 90 boiler is fully automatic
when the Boiler On/Off switch is set to ON, and will
provide domestic hot water at mains pressure on demand
and central heating when the boiler and heating system
controls call for it. A green 'Boiler On' neon on the front
of the boiler lights when the boiler is switched on, but
does not necessarily indicate that the burner is firing.
Your boiler may be fitted with either an electronic 7-day
timer or mechanical 24-hour timer. Alternatively, your
installer may have fitted a separate timer, in a convenient
position remote from the boiler.
Whichever type of timer is connected to your boiler, it
will allow you to set the operating times of the central
heating. Domestic hot water is available continuously,
provided the boiler is switched on, irrespective of the
settings on the timer.
To access the controls open the front door.
1 Heating switch - When set to TIMED the boiler
will only provide central heating during the 'on'
periods set on the timer. When set to the HOT
WATER ONLY position the boiler will not
provide central heating. When set to the
CONSTANT position the boiler provides central
heating continuously, overriding all of the timer
settings.
2 Boiler On/Off - This switches the boiler On/Off
Note: The timer will still operate with this switch
set to OFF, providing the electricity supply to the
boiler is still switched on, but the boiler will not
operate to provide domestic hot water.
Boiler controls (see Fig. A)
1.2
Control switches (see Fig. A)
1.3
Fig. A
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