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Bosch AGS10-2 Manual

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8 | Installing pipework
AGS10-2, AGS10E-2, AGS20-2, AGS50-26 720 811 270 (2015/04)
▶ Install a device into the return at the lowest point in the solar system
for draining the solar system (tee with fill and drain valve [1]).
Fig. 7
4.2 Laying pipes
Evacuated tube collectors
The minimum pipe length from the solar pump station to the collector
array must be at least 10 m (single length).
The minimum height clearance for the connection of the expansion
vessel to the collector array is 2 m.
Fig. 8 Distance to the collector array (Solar-Lux)
Solar-Lifestyle/Solar-Lito flat-plate collectors
To prevent air pockets when using an automatic air vent valve on the
collector array:
▶ Route the pipes from the pump station to the collector/air vent [1] on
a rising incline.
▶ If a change of direction downwards is unavoidable, install additional
heat-resistant (150 °C) air vents.
Fig. 9 Position of the automatic air vent valve
In some cases, the solar pump station [1] cannot be installed
underneath the collectors (e.g. in the case of attic installations).
Form a "pipe trough" with the flow in order to prevent overheating in
such systems:
▶ Firstly, route the flow to the height of collector return connection [2].
Then route it to the solar pump station.
Fig. 10
Connecting pipework
▶ Copper pipes must only be soldered with brazing solder i.e. no low
temperature soldering.
-or-
▶ Use glycol and heat-resistant (150 °C) compression fittings or push-
fit fittings.
If necessary, allow for the flow of a fill and drain valve as
well ( Chapter 6.2.1, page 13).
If the minimum pipe length or the minimum height
distance cannot be maintained:
▶ Form a "pipe trough" at least 1.5 m high with the flow
and return lines on the collector array ( Fig. 8).
> 2 m
> 1,5 m
< 2 m
0,2-0,3 m0,2-0,3 m
6720811272.01-1.ST6720811272.01-1.ST
0.2-0.3 m
1.5 m
NOTICE: Risk of damage to the collector through heat
created by brazing.
▶ Do not solder close to evacuated tube collectors.
If threaded pipe connections are caulked with hemp:
▶ Use a thread sealing compound resistant to
temperatures up to 150 °C (e.g. NeoFermit
universal).
6720801165.09-2.ST
1
6720640298-61.2ST
2
1
… 8 …


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