Switching On And Operation; Adjustment Of The Domestic Hot Water Temperature; Automatic Temperature Control System Function - Riello Caldariello Condens 25 KIS E Installer And User Manual

CALDARIELLO CONDENS KIS e
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4 - SWITCHING ON AND OPERATION

When the boiler is first started the siphon for collecting the conden-
sate is empty.
It is therefore indispensable to create a head of water filling the si-
phon before starting up, following these instructions:
- remove the siphon by releasing it from the plastic pipe connecting
to the combustion chamber
- fill the siphon about 3/4" full with water, making sure it is free of any
impurities
- check the float of the plastic cylinder
- put back the siphon, being careful not to empty it, and secure it
with the clip.
The plastic cylinder inside the siphon has the job of preventing combustible
gas coming out into the surroundings if the appliance is started without
first creating the head of water in the siphon. Repeat this operation during
routine and extraordinary maintenance operations.
4.1 Switching on the appliance
Every time the appliance is powered up, a series of data is shown on the
display including the flue gas sensor meter reading (-C- XX) (see para-
graph 4.3 - fault A09); the automatic purge cycle then starts, lasting around
2 minutes. During this phase, the three LEDs light up alternately and the
symbol is shown on the monitor (fig. 25).
To interrupt the automatic purge cycle proceed as follows:
access the electronic board by removing the housing, turning the instru-
ment panel towards you and opening the board casing (fig. 13-14-15).
Then:
- press the CO button (fig. 26).
Live electrical parts (230 V AC).
To start up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap to allow the flow of fuel
- set the room thermostat to the required temperature (~20°C)
- turn the mode selector to the desired position:
Winter mode: by turning the mode selector (fig. 27) in the area divided into
segments, the boiler provides domestic hot water and heating. If there is
a heat request, the boiler switches on and the boiler status indicator LED
lights up with a fixed green light. The digital monitor indicates the heating
water temperature (fig. 29).
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a fixed green light.
The display indicates the domestic hot water temperature (fig. 30).
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol
27) clockwise to increase water temperature and anti-clockwise to lower it.
Summer mode: turning the mode selector to the summer mode symbol
(fig. 28) activates the traditional domestic hot water only function.
If there is a domestic hot water request, the boiler switches on and the
boiler status indicator LED lights up with a fixed green light. The digital
monitor indicates the domestic hot water temperature (fig.30).
Pre-heating (faster hot water): turning the domestic hot water tempera-
ture adjustment knob to the
function. Bring the domestic hot water temperature adjustment knob back
to the required position. This function keeps the water in the domestic hot
water exchanger hot, to reduce standby times when a request is made.
When the pre-heating function is enabled, the yellow LED next to the
symbol is lit. The monitor indicates the delivery temperature of the heating
water or the domestic hot water, according to the current request. During
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symbol (fig. 31) activates the pre-heating
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burner ignition following a pre-heating request, the monitor indicates the
symbol. To deactivate the pre-heating function, rotate the domestic hot
water temperature adjustment knob back to the
LED will switch off. Bring the domestic hot water temperature adjustment
knob back to the required position.
This function cannot be activated when the boiler is OFF: mode selector
(fig.32) to

Adjustment of the domestic hot water temperature

To adjust the domestic hot water temperature (bathrooms, shower, kitchen,
etc.), turn the knob with the
temperature and anti-clockwise to lower it (min. value 37°C - max. value
60°C). On the control panel, the green LED flashes with ON for 0.5 sec-
onds, OFF for 3.5 seconds. The boiler is standby status until, after a heat
request, the burner switches on and the indicator LED turns fixed green to
indicate flame presence. The boiler continues to operate until the tempera-
tures set on the boiler are reached, or the heat request is met; after which
it goes back on standby.
If the red LED indicator near the
lights up, this means the boiler is in temporary shutdown status (see the
chapter on Light signals and faults).
The digital monitor indicates the fault code detected.
Automatic Temperature Control System function (C.T.R.) fig. 35
Setting the heating water temperature selector in the zone marked by
symbols in bold type, activates the automatic temperature control system
(frequency 0.1 sec. on; then 0.1 sec. off; for 0.5 seconds): according to
the temperature set on the room thermostat and the time taken to reach
it, the boiler varies automatically the heating water temperature reducing
the operating time, allowing greater ease of operation and energy saving.
On the control panel, the green LED flashes ON for 0.5 seconds, OFF for
3.5 seconds.
Reset function
To restore operation, set the mode selector to
then set the mode selector to the required position, checking that the red
indicator light is OFF.
At this point the boiler will automatically start and the red lamp switches
on in green.
N.B. If the attempt to reset the appliance does not activate operation, con-
tact the Technical Assistance Service.
4.2 Switching off
Temporary switch-off
In case of absence for short periods of time, set the mode selector (fig.
32) to (OFF).
In this way (leaving the electricity and fuel supplies enabled), the boiler is
protected by the following systems:
Anti-frost device: when the temperature of the water in the boiler falls
(fig.
below 5°C, the circulator and, if necessary, the burner are activated at
minimum output levels to bring the water temperature back to the values
for safety (35°C). During the anti-frost cycle, the symbol
pears on the digital monitor.
Circulator anti-blocking function: an operation cycle is activated every
24 hours.
Switching off for long periods
In case of absence for long periods of time, set the mode selector (fig. 32)
to (OFF). Turn the main system switch OFF.
Close the fuel and water taps of the heating and domestic hot water sys-
tem. In this case, anti-frost device is deactivated: drain the systems, in
case of risk of frost.
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(OFF).
symbol (fig. 33) clockwise to increase water
symbol (fig. 34) on the control panel
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symbol. The yellow
(fig. 32), wait 5-6 seconds
(fig. 36) ap-