USER INSTRUCTIONS
3
Starting - up the boiler
Open the gas Isolation valve located under
the boiler.
Switch on the boiler by placing the ON/OFF
switch (
1
)
in the
ON
position (see “Control
panel”).
The boiler will light automatically (with the
WINTER mode selected and room thermostat
connected).
Check that there are no flashing numbers on
the display
8
(see error codes). If code
H2O
appears on the display
8
this denotes that
there is no water in the boiler. Consequently,
fill the system as described in section “Filling
the system”.
■
“SUMMER” mode
To switch boiler operation to “SUMMER” mode, press button
6
(see fig. 1). The boiler will only work for the D.H.W
system. The “SUMMER” mode setting of the boiler is signalled by the symbol
lit continuously on the control
panel.
The automatic ignition system will light the burner every time there is a demand for domestic hot water. In this
case, the symbol
on the control panel will flash.
■
“WINTER” mode
To switch boiler operation to “WINTER” mode, press button
6
(see fig. 1). The boiler will only work for the central
heating system. The “WINTER” mode setting of the boiler is signalled by the symbol
lit continuously on the
control panel.
The automatic ignition system will light the burner every time there is a demand for room heating. In this case, the
symbol
on the control panel will flash.
■
“SUMMER-WINTER” mode
To switch boiler operation to “SUMMER/WINTER” mode, press button
6
(see fig. 1). The boiler will work for both
central heating/D.H.W systems. The “SUMMER/WINTER” mode setting of the boiler is signalled by the symbols
lit continuously on the control panel.
The automatic ignition system will light the burner every time there is a demand for room heating or domestic hot
water, the functioning is signalled by the symbols
flashing continually on the control panel.
■
Regulating the heating temperature
The heating temperature is regulated by knob
2
(see fig.1).
Rotating the knob anticlockwise reduces the temperature.
Rotating the knob clockwise increases the temperature.
The range of temperature settings for the central heating runs from a minimum of 30°C to a maximum of 80°C,
or, in the case of low temperature operation, from a minimum of 25°C to a maximum of 59°C.
6
7
5
4
3
2
1
8
Fig. 1
Summary of Contents for RK 25/B
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