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2.7 Wiring diagram
* Optional
2.8 Wiring diagram for zone system
Before installing the boiler in the home, check the type of heating system; if there are several zones, a special
electronic controller for multi-zone circuits, available as an optional, must be installed. This is to prevent overheating
of the unit due to possible simultaneous closing of the zone valves and consequent stopping of hot water delivery
flow.
2.9 Plumbing connections
The heating capacity of the unit must be previously established by calculating the building's heat requirement
according to current regulations, by contacting a specialised technician.
According to Italian Standard UNI 10412-2 (2009) and proper installation technique, a heating system must be
provided with all the adjustment, control and safety components to ensure proper and safe operation, as well as
shutoff and non-return valves to allow the boiler to be isolated from the system in case of maintenance and/or
checks.
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DOMUSFIRE C17-C24 HR
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