Bedienungsanleitung Bosch Uni 3000 F (Seite 6 von 40) (Englisch)

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6 | Product information

Uni 3000 F6 720 812 900 (2014/10)

2.10 Using antifreeze

Antifreeze based on glycol has been used in heating systems for many

years, for example Antifrogen N manufactured by Clariant.

The use of other types of antifreeze should not be a cause for concern if

the product is comparable with Antifrogen N.

Observe the antifreeze manufacturer's instructions. Follow the

manufacturer's details regarding mixing ratios.

The specific thermal capacity of Antifrogen N antifreeze is lower than the

specific thermal capacity of water. To enable the transfer of the required

heat output, increase the required flow rate accordingly. This should be

taken into account when sizing the system components (e.g. pumps)

and the pipework.

As the heat transfer medium has a higher viscosity and density than

water, take the higher pressure drop through the pipework and other

system components into account.

Check the resistance of all plastic or non-metallic components in the

system separately.

2.11 Pressure maintenance

▶ Size the expansion vessels correctly.

▶ Set the pre-charge pressures correctly.

If using pump-controlled pressurisation units, pressure fluctuations will

result. They can occur very frequently depending on the design of the

system and the appliance settings. Even if these pressure fluctuations

appear small, if they occur very frequently they may cause considerable

damage to the boiler, as it is designed for a predominantly static

pressure load.

To protect against damage:

▶ Ensure that every heat source is equipped with an individual

expansion vessel.

▶ Set the pre-charge pressure of the expansion vessel correctly.

2.12 Data plate

The data plate is located on the rear side of the boiler.

There you will find information such as the serial number, output and

approval details.

2.13 Tools, materials and assembly aids

For the installation and maintenance of the boiler, standard tools are

required, as used for heating, gas, water and electrical installations.

2.14 Description of appliance

The Uni 3000 F is a stationary floor-standing boiler with dual-flue

combustion to EN 303/ EN 14394 for use with oil and gas as fuel. It is

referred to in this manual as the floor-standing boiler or the boiler. The

boiler must be fitted with a burner suitable for the boiler output. The

boiler is supplied with the boiler casing mounted.

For optional accessories, contact your local Bosch Commercial and

Industrial Heating representative.

The boiler consists of the following main components:

• The boiler shell transfers the heat generated by the burner to the

heating water.

• Boiler casing and thermal insulation [2].

The boiler jacket and thermal insulation reduce heat losses.

• Control unit (accessory [1]).

The control unit monitors and controls all electrical boiler

components.

Fig. 1 Uni 3000 F oil/gas floor-standing boiler 420 kW-1200 kW

(1040 kW-1200 kW control unit placed on side of boiler)

[1] Control unit (accessory)

[2] Boiler jacket

[3] Base frame

[4] Burner door

Chemical additives that are not certified as harmless by

the manufacturer must not be used.

Boiler output (kW)

Diaphragm expansion vessel

Capacity in litres

up to 500 80

up to 1 000 140

up to 2 000 300

up to 5 000 800

up to 10 000 1600

Table 6 Minimum expansion vessel sizes

Please quote these details if you have to contact the

manufacturer because of a problem with your heating

appliance or accessories.

NOTICE: Risk of system damage from incorrect burner

matching.

▶ Only use burners that meet the technical

requirements of the boiler and match the boiler

output ( Chapter 2.16, page 8).

6 720 806 032-01.1ITL

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