Commissioning And Maintenance; Winter Mode - Riello Start Aqua Condens 25/60 BIS Installer And User Manual

Eliminating the air from the heating circuit and boiler (fig. 24)
During the initial installation phase, or in the event of a maintenance,
you are advised to perform the following sequence of operations:
- Switch off the power supply to the boiler.
- Using a CH11 spanner open the manual air vent valve located
above the air box; the tube supplied with the boiler must be
connected to the valve to let out the water into an outside
container.
- Turn on the system filling tap on the hydraulic unit and wait until
the water starts coming out of the valve. Make sure that it comes
only water.
- Close the manual air vent valve with the CH11 spanner.
- Turn off the system filling tap when the water pressure indicated
by the hydrometer reaches 1-1.5 bar.
- Switch on the power supply to the boiler leaving the boiler in OFF
mode. Check that the gas tap is closed.
- The boiler, now, starts the vent cycle. Perform it by checking
that there is no air inside the boiler and that the pressure does
not drop too much (otherwise repeat the operations described
above).
- Turn on the gas tap and ignite the boiler.
4 -

COMMISSIONING AND MAINTENANCE

4.1 First commissioning preparation
Before the ignition and the functional testing of the Start Aqua
Condens 25/60 BIS boiler, it is necessary to:
- check that the system fuel and water supply taps are open
- check that the gas type and the power supply pressure are those
for which the boiler is designed
- make sure the cap on the vent valve is open
- check on the display that the pressure of the water circuit when
cold is between 1 bar and 1.5 bar and that the circuit is vented
- check that the pre-loading of the expansion tank is adequate
(see the "Technical data" table)
- check that the electrical connections have been carried out
correctly
- check that the combustion product outlet and air suction pipes
were adequately realised
- check that the circulator turns freely; undo the inspection screw
and check with a flat screwdriver that the rotor shaft moves
without hindrances.
9
Before loosening or removing the closing tap of the circulator,
protect the underlying electrical devices from possible water
leakage.
4.2 First commissioning
- Adjust the ambient temperature thermostat to the desired
temperature (~20°C) or, if the system is equipped with a
programmable thermostat or timer, ensure that the thermostat or
timer is "active" and set correctly (~20°C)
- A variety of information appears on the display for each power
supply, including the value of the flue gases probe meter (-C- XX
- see "Display and fault codes" - Fault A 09), the boiler will then
start an automatic venting cycle of about 2 minutes
- The display shows the symbol
To stop the automatic venting cycle, proceed as follows:
- access the electronic board by removing the housing, turning the
instrument panel forwards you and opening the terminal board
cover.
Then:
- press the CO button.
CN7
CN6
CN8
9
Live electrical parts (230 Vac).
1
To start up the boiler it is necessary to carry out the following
CN9
operations:
- power the boiler
- turn on the gas tap to allow fuel flow
7
- adjust the ambient thermostat to the required temperature
1
(~20°C).
CN10
Turn the mode selector to the required position:
4

Winter mode

Turn the function selector to within the adjustment range. The
1
boiler produces domestic hot water and heating water. The boiler
lights automatically in response to a heat request. The digital
CN11
display indicates the heating water temperature. The boiler lights
automatically in response to a request for domestic hot water. The
display indicates the domestic hot water temperature.
12
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
CO button
JP6
JP7 JP5 JP4
CN5
JP8
P4
SW1
CN13
P1
CN14
P3
AKL
3.15A T
F1
WINTER MODE
FA2
DOMESTIC HOT WATER
TEMPERATURE
ENGLISH
CN12
1
JP3 JP2
JP1
P2
3
CN4
1
2
CN3
1
6
CN2
1
CN1
1
FA1
29