Commissioning And Maintenance - Riello START AQUA 24 BI Installer And User Manual

START AQUA 24 BI
Heating system:
- open the automatic vent valves (C - E)
- manually open the system drain valve (B)
- drain from the lowest points of the system.
DHW system:
- close the main water valve
- unscrew the cap on the hose connector
- connect a plastic hose to the connector of the boiler drain valve (A)
- loosen the drain valve to open it
- open the hot and cold water taps.
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COMMISSIONING AND MAINTENANCE

4.1 Preparation for initial commissioning
Before turning on and testing the boiler for the first time, check that:
- the system gas and water valves are open
- the type of gas and the supply pressure comply with the boiler
specifications
- the vent valve cap is open
- the hydraulic circuit pressure, when cold, is between 1 and 1.5 bar
and the circuit is de-aerated
- preloading of the expansion tank is adequate (refer to the data
table)
- the electrical connections have been made correctly
- the flue gas discharge ducts and the combustion air suction vents
have been fitted correctly
- that the pump rotates freely as deposits or residue may impair
smooth rotation, especially after prolonged periods of disuse.
Releasing the pump shaft if necessary
- Insert a screwdriver into hole (1) of the pump.
- Press (a) and turn the screwdriver (b) until the motor shaft releases.
1
Take great care when carrying out this operation so as not to
damage the components.
4.2 First start-up
To turn on the boiler:
- Connect the boiler to the mains
- Open the gas valve, to enable the gas supply
- Adjust the room thermostat to the desired temperature (~20°C)
Turn the function selector to the required setting:
Winter
When the function selector is set to within this range, the boiler sup-
plies domestic hot water and heating. In the event of a heating re-
quest, the boiler turns on. The digital display indicates the heating
water temperature. In the event of a DHW request, the boiler turns
on. The display indicates the temperature of the domestic hot water.
6
a
b
WINTER MODE
Heating water temperature adjustment
To adjust the temperature of the heating water, turn the function se-
lector within the adjustment range (clockwise to increase and anti-
clockwise to decrease).
HEATING WATER
TEMPERATURE
Summer
By turning the function selector to the Summer symbol
ventional function of only DHW is activated. In the event of a DHW
request, the boiler turns on. The digital display indicates the delivery
temperature.
SUMMER MODE
DHW temperature adjustment
To adjust the domestic hot water temperature (bathrooms, showers,
kitchens, etc.), turn the dial with the symbol
the value, or anti-clockwise to decrease (min. value 37°C - max.
value 60°C). The boiler remains on standby until the burner ignites
following a heat request. The boiler operates until the controlled tem-
peratures are reached or the heat demand is met, after which it re-
turns to standby status. In the case of a temporary stop, the digital
display shows the code associated with the fault that has occurred.
DHW TEMPERATURE ADJUSTMENT
Heating Temperature Control function (C.T.R.)
When the heating water temperature selector is positioned in the
sector containing the white indicators, the C.T.R. self-control function
is activated. According to the temperature set on the room thermostat
and the time taken to reach this value, the boiler automatically varies
the heating water temperature, reducing operating time and enabling
increased comfort and energy savings.
DOMESTIC HOT WATER
TEMPERATURE
the con-
clockwise to increase