Bedienungsanleitung Extraflame LP20 (Seite 10 von 40) (Englisch)

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COMPONENT DISTANCE

Temperature safety sensors On the machine or not exceeding 30 cm

Missing devices because not as per standard Not exceeding one metre, on the ow pipe

The domestic heating appliances with automatic feeding must: be supplied with a fuel block thermostat or be supplied with a

cooling circuit set-up by the appliance manufacturer.

The cooling circuit must be activated by a heat safety valve such to guarantee that the limit temperature set by the Standard is

not exceeded.

Connection between the power supply unit and the valve must be free from interceptions.

The pressure upstream from the cooling circuit must be at least 1.5 bar.

TYPE OF SYSTEM

There are two dierent types of system:

Open vessel system and closed vessel system.

The product has been designed and realised to work with closed vessel systems.

CLOSED VESSEL SYSTEM

System in which the water it contains is not in direct or indirect communication with the atmosphere. Generally, the closed

vessel system has one of the following expansion vessels:

Pre-loaded closed expansion vessel with membrane impermeable to the passage of gases.

Automatic closed expansion system with compressor and membrane impermeable to the passage of gases.

Automatic closed expansion system with transfer pump and membrane impermeable to the passage of gases.

Expansion system without diaphragm.

GENERALITY

The closed systems must have:

Safety valve

Pump control thermostat

Acoustic alarm activation thermostat

Temperature indicator

Pressure indicator

Acoustic alarm

Adjustment automatic circuit breaker switch

Automatic circuit breaker switch (block thermostat)

Circulation system

Expansion system

Safety dissipation system incorporated with the generator with thermal safety valve (self-activated), whenever the

appliance does not have a temperature self-adjustment system

SAFETY VALVES

The load capacity of the safety valve must allow the discharge of a quantity of vapour, not lower than: Q / 0.58 [kg/h] where: Q

is the useful outlet power to the generator water expressed in kilowatt. The diameter of the minimum net transversal section

of the valve inlet must not be lower than 15 mm. The valve load pressure, equal to the calibration pressure, increased by the

overpressure, cannot exceed the maximum exercise pressure of the heat generator. The designer must check that the maximum

pressure existing in every point of the system, does not exceed the maximum exercise pressure of its every component . The

safety valve must be connected to the highest part of the heat generator or outlet pipes, immediately near the generator. The

length of the pipes route included between the attachment to the generator and the safety valve must not be more than 1 m.

The connection piping of the safety valve to the heat generator must not be traceable and must not present, in any point, a

| ENGLISH

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