Bosch Worcester AGS 5 - 4 Installing Pipework; General Information Regarding Pipework

INSTALLING PIPEWORK
6 720 643 603 (2011/11)
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4 INSTALLING PIPEWORK
4.1 GENERAL INFORMATION
REGARDING PIPEWORK
The collectors, the solar pump station and the solar
storage tank are interconnected with copper pipes.
B To prevent air locks: route the pipes from the tank to
the collector on a rising incline.
Fig. 4 The piping of the solar heating system
1 Wire to the collector temperature sensor
2 Collectors
3 Solar pump station
4 Solar storage tank
CONNECTING THE PIPES
B Copper pipes for solar heating systems should always
be brazed (i.e. no low-temperature soldering).
Compression fittings or pressfittings can be used
instead of brazing if they are glycol- and heat-resistant
(150 °C).
CAUTION: System damage from plastic
pipes (e.g. PE pipes)
B Use only materials which can withstand
the temperatures up to 150 °C which
occur in solar heating systems.
7747006489-05.1SD
2
3
1
4
CAUTION: System damage from heat
buildup when brazing
B Do not carry out brazing close to
evacuated tube collectors.
We recommend carrying out a pipe network
analysis to determine pipe requirements.
Basic design estimates can be made using
Tab. 4.
B If there are many additional points of
resistance (bends, valves etc.), you may
need to select a pipe with a larger
diameter.
Straigh
t pipe
length
Number of collectors
Up to 5 Up to 10
Up to
6 m
Double pipe 15 Ø 15 mm
(DN12)
Ø 22 mm (DN15)
Up to
10 m
Double pipe 15 Ø 15 mm
(DN12)
Ø 22 mm (DN20)
Up to
15 m
Double pipe 15 Ø 15 mm
(DN12)
Ø 22 mm (DN20)
Up to
20 m
Ø 22 mm (DN15) Ø 22 mm (DN20)
Up to
25 m
Ø 22 mm (DN15) Ø 28 mm (DN25)
Tab. 4 Pipe sizing
If threaded pipe connections are caulked
with hemp:
B Use a thread sealing paste resistant
to temperatures up to 150 °C
(e.g. NeoFermit universal).