Connecting Potable Water Pipe - Bosch TSS Series Installation And Maintenance Instructions Manual

9.3

Connecting potable water pipe

Installing pressure relief valve and expansion vessel
WARNING:
Risk of scalding at the pressure relief valve!
Due to differences in temperature and pressure in the storage tank,
water may escape from the pressure relief valve.
▶ Do not seal opening.
▶ Install an on-site expansion vessel (≥ 12 litres) on the cold water
storage tank connection.
If the water inlet pressure at the storage tank is higher than 4 bar:
▶ Install a pressure reducer and set to a max. of 4 bar.
NOTICE:
System damage due to overpressure.
To ensure the connection between the water inlet and pressure relief
valve remains clear:
▶ Do not install any extra accessories or shut-off valves.
▶ Install the pressure relief valve 8 bar [3] on the cold water storage
tank connection in such a way that the lever for venting can be set to
the maintenance position [6].
▶ Connect the cold and hot water pipes on site in accordance with local
regulations.
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Fig. 55 Connecting potable water pipework
[1] DHW storage tank connection
[2] Cold water storage tank connection
[3] Pressure relief valve 8 bar (with non-return valve),
lever in operating position
[4] Water outlet opening
[5] Expansion vessel (on site)
[6] Lever in maintenance position (venting)
TSS – 6720887693 (2018/10)
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0010014881-01
System examples
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Fig. 56 System example without solar module
[1] Reheating
[2] Hot water
[3] Expansion vessel
[4] Domestic Cold water
[5] Pressure relief valve with siphon
[6] Thermostatic valve
[7] Thermosiphon system (only storage tank shown)
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Fig. 57 System example with solar module
[1] Reheating
[2] Hot water
[3] Expansion vessel
[4] Domestic Cold water
[5] Pressure relief valve with siphon
[6] Solar module
[7] Thermosiphon system (only storage tank shown)
Hydraulic connection
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0010011166-01
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0010011167-01
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