Ravenheat HE 25 S COMPACT, Инструкция по использованию, установке и обслуживанию

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When there is a demand for domestic hot
water, the burner and pump perform as
they do during central heating except that
the burner is commanded by the DHW
thermostat.
When DHW is no longer called for (tap is
turned off ), the boiler will automatically return
to the central heating mode.
Select the summer position by pressing the
summer/winter button. The boiler functions
like an automatic gas hot water heater.
When DHW is no longer required the burner
and pump and fan will immediately turn off .
This also takes place when in winter mode,
if there is no demand for heat to the central
heating system or until the digital clock and
room thermostat (if fi tted) demands the
central heating circuit.
2.8 SAFETY DEVICE
In both central heating and domestic hot
water mode safe operation is ensured by a
control board which shuts off the main
burner, if the fan stops or the fl ue or
combustion air intake duct is obstructed.
An overheat cut off thermostat acts to turn
off the burner to resettable “lockout”.
A safety valve is fi tted on the central heating
circuit set at 3 bar.
A low water pressure switch set at 0.4 bar is
fi tted on heating circuit, to prevent the boiler
operating below this boiler system pressure.
2.7 OVERALL DIMENSION
(Fig. 5)
2.9 AVAILABLE PUMP HEAD
Fig. 5