Main Combi 30 HE Installation & Service Instructions Manual page 53

Temperature Control
1. Central Heating: The central heating hot water
flow temperature can be adjusted between 30° C (±
5° C) minimum and 85° C (± 5° C) maximum.
2. Turn the control knob clockwise to increase the
temperature (Fig. 7).
3. In normal winter usage we recommend that the
central heating temperature be set at maximum.
4. Domestic Hot Water: The temperature of the
domestic hot water can be adjusted by turning the
control knob clockwise to increase up to a
maximum of 65° C (Fig. 8).
5. The temperature of the water is also dependent
on the water flow rate and the temperature of the
mains coming into the house.
6. By slightly reducing the flow from the tap the
temperature will increase up to the maximum if
required.
7. The flow rate can be reduced down to as low as
2.5 litre/min. The boiler will still recognise the need
to heat the water.
Flame Failure Reset
1. The red flame failure neon (
the event of the burner failing to light, when
incomplete lighting of the burner occurs or blockage
of the condensate drain (Fig. 9).
2. Turn the selector switch fully anti-clockwise
against the spring pressure to the 'Reset' position
for at least two seconds and release (Fig. 10). Set
the selector to the required position to light the
boiler.
3. If the flame failure light illuminates repeatedly a
fault is indicated with either the boiler, the gas
supply or the condensate drain. Your Installer or
Service Engineer should be contacted as soon as
possible.
Safety Thermostat
1. Your Main Combi 30 HE is fitted with additional
safety devices, which shut down the boiler in the
event of the system, the boiler or the flue
overheating. The safety thermostat neon (
light in this instance (Fig. 9).
2. To reset: Turn the selector fully anti-clockwise
against the spring pressure to the 'Reset' position,
for at least two seconds and release (Fig. 10). Set
the selector to the required position to light the
boiler.
3. If after turning the selector to the 'Reset' position
the boiler does not relight or the safety thermostat
operates repeatedly, causing boiler shutdown, a
fault is indicated. Your Installer or Service Engineer
should be contacted as soon as possible.
) will illuminate in
Flame Failure
Neon
) will
Reset Position
Fig. 7
Central Heating
Temperature Control
Fig. 8
Domestic Hot Water
Temperature Control
Safety Thermostat
Neon
Fig. 9
Fig. 10
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