Safety Equipment; Arrangement Of Minimum Safety Equipment In; Accordance With Bs En 12828:2012 - Bosch Uni Condens 8000 F Installation And Maintenance Instructions Manual

13

Safety equipment

Further safety accessories are listed on the Bosch Commercial and
Industrial website.
13.1

Arrangement of minimum safety equipment in

accordance with BS EN 12828:2012

Boiler 300 kW; operating temperature 105 °C; shutdown
temperature(high limit safety cut-out) 110 °C – direct heating
11
0,5 %
6/7
8
1)
3
> 300 kW
12 18
19
Fig. 43 Safety equipment in accordance with BS EN 12828:2012 for
boilers > 300 kW with high limit safety cut-out (STB) ≤ 110 °C
RK Boiler return
VK Flow
Uni Condens 8000 F – 6720867056 (2016/10)
VK
2
1)
5
10 9
P
15
20
1)
4
1
15
14
16
17
13
2
RK
0010011778-001
[1] heat source
[2] Shut-off valve, flow/return
1)
[3] Temperature controller
1)
[4] High limit safety cut-out
[5] Temperature capturing facility
[6] Diaphragm safety valve MSV 2.5 bar/3.0 bar or
[7] Pressure relief valve HFS ≥ 2.5 bar
[8] Flash trap; not required in systems > 300 kW if a high limit safety
cut-out (with a limit of ≤ 110 °C) and a maximum pressure limiter
are additionally provided for each boiler.
[9] Maximum pressure limiter
[10] Pressure meter
[11] Low water indicator; not in systems ≤ 300 kW, where instead a
minimum pressure limiter or a replacement measure approved by
the manufacturer is provided for each boiler.
[12] Non-return component
[13] Drain & fill valve (DFV)
[14] Safety pipe
[15] Shut-off valve – protected against unintentional closure, e.g. by
sealed cap valve
[16] Drain upstream of the expansion vessel
[17] Expansion vessel (EN 13831)
[18] Filling facility
[19] Suitable device for separate heating from potable water system
[20] Boiler safety assembly drain valve (manostat bar)
The figures provide a schematic representation of the safety equipment
in accordance with BS EN 12828:2012 for the system version listed
here - no claim is made as to their completeness. Practical
implementation is subject to currently applicable technical rules.
▶ Observe country-specific limits.
Low water indicator to protect against overheating
In accordance with BS EN 12828:2012, a low water indicator is
required to protect the boiler against overheating. BS EN 12828:2012
permits an approved minimum pressure limiter as an alternative to the
low water indicator.
1) The maximum achievable flow temperature in combination with control units in
the CFB 800/CFB 900 series is around 18 K below the cut-off temperature of the
high limit safety cut-out.
The maximum achievable flow temperature in combination with control units of
the CC 8000 series is around 12 K below the cut-off temperature of the high limit
safety cut-out.
Safety equipment
1)
39