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Ariston BCH 120L Manual

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Technical Installation Instructions and User Guide
GB
Safety assembly
The unit must be installed with a safety assembly that meets current national and EU standards, connected to the cold water inlet tube and
suitable for the maximum working pressure indicated on the technical label.
It is advisable to use a safety assembly with a membrane.
The safety assembly must be installed as close as possible to the cold water inlet and the water ow must not be obstructed by other acces
-
sories.
If, for technical reasons, the safety assembly cannot be installed with a direct link to the cold water inlet, a rigid link must be used.
In any case, the link must be made using a material that is able to withstand the temperatures and pressures indicated on the technical label.
The outlet for the safety assembly should never be obstructed and should be linked to vertical evacuation tubes with a diameter at least as
large as that of the unit's connections.
It is recommended that the safety assembly be installed as low down as possible so that the unit can be drained suciently.
If the supply pressure is greater than 4/5 bar, a pressure reducer must be installed upstream of the safety assembly.
It is recommended that a stop valve be positioned upstream of the safety assembly.
Always use new connection piping to make connections to a water supply network, never install used pipes. These pipes must also conform to the EN
61770 standard.
Water connection and preliminary operations
- Verify that the useful thermal power from the generator exceeds the power that the tank can absorb by more than 15%.
- Verify that the volumes and the pre-charge pressure of the secondary circuit expansion reservoir are suitable for the system.
- If the water in the circuit is excessively hard, install (upstream of the tank), a correctly adjusted water softener.
- If impurities are found in the water in the circuit, install a suitable lter, making sure that the circulators have sucient ow and a sucient
extractor and that they rotate regularly.
- Verify that the thermostat sensor is correctly positioned.
- Verify that the thermostat controls are functioning correctly.
- Install a safety assembly that meets current national and EU standards, and which is suitable for the maximum working pressure
indicated on the product identication label.
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