Drazice OKC 160 NTR / BP Manuale di funzionamento e installazione - Pagina 10

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2.3 PLUMBING FIXTURE

Connection of appliances to plumbing fixtures is illustrated on (Figure 4, Figure 6). For

potential disconnection of the appliance, the service water inlets and outlets must be

provided with screw coupling Js 3/4". Safety valve is mounted on the cold water inlet

identified with a blue ring.

Each hot service water pressure appliance must have a safety valve with a membrane spring.

Nominal clearance of safety valves is defined in the standards. The appliances are not

equipped with a safety valve. The safety valve must be easily accessible, as close to the

appliance as possible. The input pipes must have at least the same clearance as the safety

valve. The safety valve is placed high enough to secure dripping water drain by gravity. We

recommend mounting the safety valve onto a branch pipe. This allows easier exchange

without having to drain the water from the appliance. Safety valves with fixed pressure

settings from the manufacturer are used for the assembly. Starting pressure of a safety valve

must be identical to the maximum allowed appliance pressure, and at least 20% higher than

the maximum pressure in the water main. If the water main pressure exceeds such value, a

reduction valve must be added to the system. No stop valves can be put between the

Figure 2

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