Installing The Expansion Vessel; (Available As An Accessory); Adjusting The Inlet Pressure Of The Expansion Vessel; Connecting Pipes And Blow-Off Line To - Bosch Worcester AGS 5 Installation And Servicing Instructions

INSTALLING THE SOLAR PUMP STATION
5.5.2

INSTALLING THE EXPANSION VESSEL

(AVAILABLE AS AN ACCESSORY)

B Install the expansion vessel with the relevant
mounting materials.
B Connect the expansion vessel (3) in the return line on
the solar heating station's safety assembly.
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Fig. 10 Connecting the expansion vessel
1 Safety valve
2 Flexible stainless steel tube from connection set for the
expansion vessel (available as an accessory)
3 Expansion vessel
5.5.3 ADJUSTING THE INLET PRESSURE OF THE
EXPANSION VESSEL
The inlet pressure of the expansion vessel is
given by the static system height plus
0.5 bar (1 metre difference in height equals
0.1 bar).
B Set a minimum pressure of 1.5 bar.
B To make use of the maximum possible volume: set the
inlet pressure when the vessel is not under stress
(i.e. no fluid pressure).
B If the calculated inlet pressure is higher or lower than
the factory-set inlet pressure, correct the inlet
pressure accordingly.
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5.6 CONNECTING PIPES AND BLOW-OFF
LINE TO THE SOLAR PUMP STATION
DANGER: Possible injuries and system
damage from incorrectly installed blow-off
line
B Make sure the blow-off line has the same
size as the cross-section of the safety
1 valve (maximum length = 2 m and
maximum of two bends).
B Cut the pipes to a length which will allow them to be
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pushed into the compression fitting (1) until they
bottom out.
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B Route the blow-off line (2) from the safety valve so
that it can be seen to empty out into the storage
vessel (4) and secure it in place with a pipe clamp (3).
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1 1 4
Fig. 11 Connection to solar pump station
1 Compression fitting
2 Blow-off line
3 Pipe clamp
4 Empty solar fluid container (storage vessel)
INSTALLING THE FILL AND DRAIN VALVE
B Install a fitting into the return pipe at the lowest point
in the solar heating system for draining the solar heat-
ing system (tee with fill & drain valve,
6 720 643 603 (2011/11)
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Fig. 12, (4)).
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