Riello 20044966, Installation And Maintenance Manual

Page: 36 / 56

TECHNICAL ASSISTANCE SERVICE 36
SUMMER (
}
):
With the function selector set to Summer,
the boiler functions only in domestic hot water mode. The
temperature gauge (1) shows the temperature of the hot
water inside the storage cylinder.
b
To ensure correct functioning, set the room tempera-
ture thermostat to its minimum setting.
WINTER (
{
):
With the function selector set to Winter, the
boiler functions in central heating and domestic hot water
modes. The display shows the temperature of the central
heating flow.
- Set the room thermostat to the required temperature (~
20°C) or, if the system has a timer or timer-thermostat,
make sure that this is switched “On” and adjusted to the
required temperature (~ 20°C).
-
Turn the function selector (3) to
" "
SETTING CENTRAL HEATING WATER TEMPERATURE
USING THE OUTDOOR TEMPERATURE SENSOR
Since an outdoor temperature sensor is installed, the sys-
tem automatically adjusts the temperature of the central
heating flow to bring room temperature rapidly to a level
determined on the basis of outdoor air temperature.
To adjust room temperature manually with respect to the
automatic setting calculated by the control card, turn the
heating temperature selector "
/
" clockwise to increase
temperature or anti-clockwise to reduce it.
The available adjustment range is between -5 and +5
comfort levels as shown on the digital display when the
knob is turned (see the “AUTOMATIC TEMPERATURE
CONTROL” section).
0
bar
4
1 3
2
°C
0 120
20 100
40 80
60
0
bar
4
1 3
2
°C
0 120
20 100
40 80
60
1
kWh
Esc
F1
F3
F4
F2
A1
3
A CO B
A A
A
circuit as instructed on page 32.
Once the CH circuit reaches the right pressure,
switch the boiler back on again to start the auto-
matic venting cycle.
Repeat these steps until the pressure in the CH
circuit stabilises between 1 and 1.2 bar.
b
To interrupt the automatic venting cycle unscrew the
four screws (A), remove the front trim (B) and press
the combustion analysis button (CO).