Manual Bosch Uni 3000 F (page 35 of 40) (English)

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Appendix | 35

6 720 812 900 (2014/10)Uni 3000 F

10.1 Arrangement of safety equipment to EN 12953-6;

shutdown temperature (high limit safety cut-out)

> 110 °C

Shutdown temperature (high limit safety cut-out) > 110 °C, example 1

Fig. 36 Safety equipment to EN 12953-6 for boilers with high limit

safety cut-out > 110 °C, example 1 (direct heating)

Shutdown temperature (high limit safety cut-out) > 110 °C, example 2

Fig. 37 Safety equipment to EN 12953-6 for boilers with high limit

safety cut-out > 110 °C, example 2 (direct heating)

Key to Fig. 36 and 37:

[RK] Heating return

[VK] Heating flow connection

[1] Hot water boiler

[2] Maximum pressure limiter [PSZ+A+]

[3] Pressure display facility

[4] Water level controller

[5] Flash trap

[6] Pressure relief valve

[7] Minimum water level limiter [LSZ-A-]

[8] Temperature limiter [TZA+A+]

[9] Temperature control unit

[10] Temperature display facility

[11] Fill & sample facility for water level test

[12] Shut-off valve (locked to prevent unintentional closing)

[13] Sealed expansion vessel

[14] Minimum pressure limiter [PSZ-A-]

[15] Non-return valve

[17] Shut-off valve (return)

[18] Line to the sealed expansion vessel

[19] Feed pump

[20] Heating facility

[22] Pressure maintaining pump

[23] Pressure regulator

[24] Automatic shut-off valve (closed at zero volt)

[25] Water level display

[26] Open expansion vessel

[27] Pressure maintaining valve (if N/C or if the actual pressure is

lower than the minimum pressure, then (24) may be omitted)

[28] Shut-off valve with optional connection for test pressure gauge

[30] Minimum temperature controller (if required)

[31] Drainage system

The figures show the safety equipment to EN 12953-6 schematically for

the system versions listed here - no claim is made as to their

completeness.

The figures only show variants where the pressure is maintained via a gas

buffer or pressure maintaining pump. Beyond this, refer to EN 12953-6

for other versions of pressure maintenance with different types of safety

equipment.

With a high limit safety cut-out > 110 °C, far-reaching requirements (e.g.

regular inspections etc.) in accordance with the Health & Safety at Work

Act [Germany] must be satisfied.

Practical implementation is subject to currently applicable technical

rules. It is recommended that the system schematics be reviewed by the

responsible supervisory authority.

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