Riello Start Condens 25 IS Manuel D'installation Et D'utilisation page 26

START CONDENS 25 IS
5.1 - Winter
turn the function selector to within the adjustment range. The boiler
produces domestic hot water and heating water. The boiler lights
automatically in response to a heat request. The digital display indi-
cates the heating water temperature. The boiler lights automatically
in response to a request for domestic hot water. The display indi-
cates the domestic hot water temperature.
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the mode selector to
within the adjustment range (turn clockwise to increase the value
and anticlockwise to reduce the value).
Depending on the type of system, the most suitable temperature
range can be pre-selected:
• standard systems 40-80 °C
• floor installations 20-45°C.
For details see paragraph "Boiler configuration".
heating water
temperature
domestic hot water
temperature
Adjusting the heating water temperature with an external
probe connected
When an external probe is installed, the delivery temperature is au-
tomatically selected by the system, which quickly adjusts the ambi-
ent temperature according to variations in the outside temperature.
If you want to alter the temperature value (increasing or reducing
the value automatically calculated by the electronic card), use the
heating water temperature selector: turn it clockwise to increase the
temperature, or anticlockwise to reduce it.
The correction possibility is between -5 and +5 levels of comfort,
shown on the digital display by rotating the knob.
5.2 - Summer (with external storage tank connected)
The standard domestic hot water-only mode is activated by turning
the selector to the summer symbol
in response to a request for domestic hot water. The digital display
indicates the temperature of the domestic hot water.
5.3 - Adjustment of the domestic hot water temperature
MODE A heating only - adjustment not applicable
MODE B heating only + external storage tank with thermostat -
adjustment not applicable.
MODE C only heating + external storage tank with probe - to ad-
just the temperature of the domestic water held in the storage tank,
turn the temperature selector: clockwise to increase the temperature
or anticlockwise to reduce it.
The adjustment field is between 35 and 60 °C.
. The boiler lights automatically
When selecting the temperature, for heating or hot water, the display
shows the value being selected.
About 4 seconds after selection, the modification is stored and the
display resumes the delivery temperature.
5.4 - Heating Temperature Control function (H.T.C.)
Turn the heating water temperature selector into sector highlighted
with white markers to activate the H.T.C. self-adjusting system: de-
pending on the temperature set on the ambient thermostat and the
time taken to reach it, the boiler automatically varies the heating
water temperature by reducing operating time, thereby achieving in-
creased comfort and energy savings.
5.5 - Reset function
To restore normal operation, turn the function selector to off, wait 5-6
seconds, and then turn it to the required position. At this point, the
boiler will restart automatically.
NOTE - If the attempts to reset the appliance do not activate opera-
tion, contact the Technical Assistance Centre.
5.6 - Temporary switch-off
In the event of temporary absences(weekends, short trips, etc.) set
the mode selector to (OFF).
9 In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
• Antifreeze: when the temperature of the water in the boiler drops
below 5°C the circulator starts and, if necessary, the burner at
minimum output to being the water temperature to safety values
(35°C). During the antifreeze cycle, the symbol
digital display.
• DHW only when connected to an external storage tank with
probe: the function is activated if the temperature measured by
the storage tank probe drops below 5°C. A heat request is gen-
erated in this phase with the ignition of the burner at minimum
output, which is maintained until the water temperature reaches
55° C. During the antifreeze cycle, the symbol
digital display.
• Circulator antiblocking: an operation cycle is activated every 24
h.
5.7 - Switching off for lengthy periods
If the START CONDENS IS boiler is not used for a long time, the
following operations must be carried out:
• Set the mode selector to off (OFF)
• Set the system's main switch to "off"
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