Bedienungsanleitung Bosch AGS10-2 (Seite 10 von 28) (Englisch)

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10 | Installing the solar pump station

AGS10-2, AGS10E-2, AGS20-2, AGS50-26 720 811 270 (2015/04)

5.3.1 Solar pump station with an external controller

▶ You will find notes regarding the electrical connection in the controller

instructions.

5.4 Installing the safety assembly

▶ Install the safety assembly on the solar pump station together with the

gasket supplied [1].

Fig. 14 Installing the safety assembly

[1] Gasket (21x30x2)

5.5 Connecting the expansion vessel and pre-cooling

vessel

5.5.1 Installing the pre-cooling vessel with evacuated tube

collectors (available as accessory)

With evacuated tube collectors, a pre-cooling vessel is required if:

• The system is designed to support a central heating system.

• The system is purely for DHW heating and the solar fraction is more

than 60 %.

• The minimum pipe length or the minimum height distance cannot be

achieved ( Chapter 4.2, page 8).

The pre-cooling vessel protects the expansion vessel from excessively

high temperatures.

Connecting the pre-cooling vessel

If the pipeline to the expansion vessel needs to be laid on a rising incline,

an additional air vent must be installed.

▶ Secure pipework to and from the pre-cooling vessel with pipe clips

[4]. Mount the pre-cooling vessel vertically.

▶ Connect the expansion vessel [5] to the pre-cooling vessel by means

of a copper pipe.

▶ Seal the connection on the pressure relief valve with a ¾ " cap [2] on

site.

Fig. 15 Installing the pre-cooling vessel

[1] Flexible stainless steel hose from the connection set for the

expansion vessel (available as accessory)

[2] Safety assembly (provided by installer)

[3] Pre-cooling vessel

[4] Pipe clip (on site)

[5] Expansion vessel

5.5.2 Installing the solar expansion vessel (available as an

accessory)

▶ Install the expansion vessel with the mounting materials provided.

Never turn off the heating system when you are away on

holiday or in summer as this may disable the solar

system.

For a single-line solar pump station:

▶ Install the safety assembly on the left.

Do not insulate the pre-cooling vessel (if fitted) and the

expansion vessel, nor the pipes connecting them to the

safety assembly.

6 litre 12 litre

Height 270 mm 270 mm

Diameter 160 mm 270 mm

Port 2 x R ¾ " 2 x R ¾ "

Maximum operating pressure 10 bar 10 bar

Table 6 Pre-cooling vessel specifications

7747006489.13-2.ST

WARNING: Risk of injury If the pressure relief valve is

damaged, this may result in an explosion.

To protect the pressure relief valve from excessive

temperatures:

▶ Connect the pre-cooling and expansion vessels with a

tee (¾ " outer thread with flat gasket) in the return 20

to 30 cm above the solar pump station.

WARNING: Risk of injury If the pressure relief valve is

damaged, this may result in an explosion.

To protect the pressure relief valve from excessive

temperatures:

▶ Connect the pre-cooling and expansion vessels with a

tee (¾ " outer thread with flat gasket) in the return 20

to 30 cm above the solar heating station.

20-30 cm20-30 cm

7747006489.14-2.ST

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