Table of Contents
Advertisement
11
System examples
11
System examples
11.1 Layout of the minimum equipment for technical
safety in accordance with EN 12828:2003; operating
temperature < 105 °C; cut-out temperature (high
limit safety cut-out) < 110 °C
Boiler 300 kW; operating temperature 105 °C; cut-out
temperature (high limit safety cut-out) 110 °C – direct heating
11
6/7
1)
3
≤ 300 kW
12
13
Fig. 41 Safety equipment in accordance with EN 12828:2003 for
boilers 300 kW with high limit safety cut-out (STB) 110 °C
Key to Fig. 41:
[RK] Return
[VK] Flow
[1]
Heat emitters
[2]
Shut-off valve, flow/return
[3]
Temperature control unit
1)
[4]
High limit safety cut-out
[5]
Temperature capturing facility
[6]
Diaphragm safety valve MSV 2.5 bar/3.0 bar or
Lift spring safety valve HFS 2.5 bar
[7]
[10] Pressure gauge
[11] Low water safety cut-out. Alternatively, one minimum pressure
limiter or a replacement measure approved by the manufacturer
for each boiler
[12] Non-return valve
[13] Drain & fill valve (DFV)
[14] Expansion line
[15] Shut-off valve – protected against unintentional closure, e.g. by
sealed cap valve
[16] Drain upstream of the expansion vessel
[17] Expansion vessel (DIN-EN 13831)
The diagrams give a schematic representation of the
safety equipment to EN 12828 for the system versions
listed here - no claim is made as to their completeness.
Practical implementation is subject to currently
applicable technical rules.
1) The maximum achievable flow temperature in combination with Logamatic
control units is approx. 18 K below the cut-off temperature of the high limit safety
cut-out.
38
VK
2
1)
5
10
15
13
1)
4
1
15
14
16
17
2
13
RK
6 720 640 417-13.1il
1)
1)
Low water level limiter to protect against overheating
In accordance with EN 12828:2003, a low water level limiter is required
to protect the boiler against overheating. The EN 12828:2003 permits
an approved minimum pressure limiter as an alternative to the low water
level limiter.
Logano plus SB325 – 6 720 806 328 (2013/07)
Advertisement
Table of Contents
