Gas Connections; Commissioning And Maintenance - Riello START AQUA 24 BI Manuel De L'installateur Et De L'utilisateur

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A carry case kit is available so that connections can be made
quickly, without wasting time on each system.
M heating delivery 3/4"
R
heating return 3/4"
G gas 3/4"
AF cold water inlet 1/2"
AC hot water outlet 1/2"
3.8 Electrical connections (fig. 8-9-10)
The START AQUA 24 BI boiler is factory-wired and must simply be
connected to the electrical mains (using the power cable supplied).
The room thermostat (RT) or timer must be connected to the
relative terminals.
- Turn the main system switch OFF.
- Unscrew the case screws (A).
- Move the bottom of the case forward and then upwards to detach
it from the frame.
- Press the side buttons of the panel and then turn it forwards.
- Loosen the screws of the cover protecting electrical parts B and
remove the cover.
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Low voltage safety room thermostat (voltage-free contact).
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When using a phase-phase power supply, use a tester to
determine which of the two wires has the greater potential
compared to the earth and connect it to the L terminal.
Connect the remaining wire to the N terminal.
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The boiler can also operate with a phase-neutral or phase-
phase power supply.
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The earth wire must be approximately 2 cm longer than the
other wires.
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You must:
- use a general trip-switch to disconnect the line in compliance
with CEI-EN 60335-1 standards (contact opening at least
3.5 mm, category III)
- use cables with a cross-section of ≥ 1.5 mm
the L (phase) - N (neutral) connection
- ensure that the amperage on the switch is adequate for the
boiler's electrical power rating. Please refer to the technical
data to check the electrical rating of the model installed
- connect the appliance to an efficient earthing system
- ensure that the power socket can be accessed after
installation.
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The use of gas or water pipes to earth this appliance is strictly
prohibited.
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The manufacturer declines any liability for damage caused by
failure to comply with the wiring diagrams.
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The installer is responsible for ensuring that the appliance has
an efficient earthing system. The manufacturer declines all
liability for any damage caused by a faulty earthing circuit or
the lack of an efficient earthing circuit.
3.9

Gas connections

The START AQUA 24 BI boilers must be connected to the main
gas supply in compliance with current installation standards.
Before connecting the appliance, ensure that:
- the type of gas is compatible with the boiler model being installed
- all pipelines are thoroughly cleaned.
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The gas supply system must be suited to the flow rate of the
boiler and must be fitted with all safety and control devices as
envisaged by current standards. The use of a suitably sized
filter is recommended.
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At the end of installation, check all connections are properly
sealed.
3.10 Flue gas outlet and combustion air suction (fig. 11-12)
The discharge pipeline and connection to the flue must comply
with current local and national standards and legislation. Use rigid
ducts. Joints between parts must be airtight. All components must be
resistant to high temperatures, condensate and mechanical stress.
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START AQUA 24 BI boilers are equipped with a flue thermostat
positioned on the right side of the hood. If combustion products
are returned, this device immediately shuts down operation of
the boiler.
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The combustion air vents must comply with current technical
standards.
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Discharge ducts without insulation are a potential source of
danger.
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Do not seal off or reduce the size of the air vents in the room
where the boiler is installed.
3.11 System filling and emptying (fig. 13)
In case of a new installation or replacement of the boiler, it is
necessary to clean the heating system.
In order to ensure the proper functioning of the product, after any
cleaning, additive and/or chemical treatments (e.g. antifreeze
liquids, filming agents, etc.) check that the parameters in the table
are within the indicated values.
Parameters
pH value
Hardness
Appearance
Fe
Cu
START AQUA 24 BI boilers are equipped with a filling valve (D) on
the heating system and primary circuit of the boiler.
FILLING
Ensure that the boiler drain device (A) is closed.
DHW system:
- open the cold water inlet tap to fill the boiler
- to check that the boiler is full, open a hot water tap and wait for
water to be delivered.
Heating system:
- open the automatic air vent valve cap (C) by two or three turns
- slowly fill the system via the filler valve (D) until the hydrometer
shows a pressure value between 1 and 1.5 bar
and respect
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- close the system filler valve (D)
- air is bled automatically from the START AQUA 24 BI boiler via
the vent valve on start-up (see chapter "First start-up").
EMPTYING
Before emptying the boiler, disconnect the electric power supply by
switching the main system switch to "OFF".
Close all shut-off devices of the DHW and heating circuits.
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.
4 -

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.
unit of Hot water
measurement circuit
- 7-8
°F -
- -
mg/kg 0,5
mg/kg 0,1
ENGLISH
Filling
water
-
<15
clean
-
-
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