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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
1
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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