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Bosch Uni 3000 F Manual

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34 | Appendix
Uni 3000 F6 720 812 900 (2014/10)
10 Appendix
Fig. 35 Safety equipment to EN 12828 for boilers > 300 kW with high
limit safety cut-out
110 °C (direct heating)
1)
Standard equipment of the boiler control unit: The maximum achievable flow
temperature in combination with control units from the CFB 9xx series is
approx. 18 K lower than the shutdown temperature (high limit safety cut-out).
Key to Fig. 35:
[RK] Heating return
[VK] Heating flow connection
[1] Heat sources
[2] Shut-off valve, flow/return
[3] Temperature control unit
[4] High limit safety cut-out
[5] Temperature capturing facility
[6] Diaphragm safety valve 2.5 bar/3 bar or
[7] Lift spring safety valve = 2.5 bar
[8] Flash trap in systems > 300 kW; not required if, instead, a high
limit safety cut-out with shutdown temperature of 110 °C and a
maximum pressure limiter are provided additionally for each
boiler.
[9] Maximum pressure limiter
[10] Pressure gauge
[11] Low water indicator (not in systems 300 kW). Alternatively one
minimum pressure limiter or a replacement measure approved by
the manufacturer is provided for each boiler.
[12] Non-return valve
[13] Drain & fill valve (DFV)
[14] Expansion line
[15] Shut-off valve with lockout against unintentional closure
(e.g. by sealed cap valve)
[16] Drain upstream of the expansion vessel
[17] Expansion vessel (to EN 13831)
The figures show the safety equipment to EN 12828 schematically for
the system versions listed here - no claim is made as to their
completeness.
Practical implementation is subject to currently applicable technical
rules.
2
11
9
13
15
6/7
12
13
14
15
16
17
2
13
RK
VK
8
0,5 %
P
1
> 300 kW
10
5
1)
4
1)
3
1)
… 34 …


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