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6 720 645 817 (2010/09)
49
7.5 Boiler safety set
A factory-prepared boiler safety set is available for the
Suprapur KBR ...
This set comprises the following:
Pressure gauge
Safety valve R 1 (for boiler size 120 kW)
Safety valve R (for boiler sizes 160 kW to 280 kW)
Automatic air vent valve
Insulation, grey
Fig. 33 Boiler safety set
7.6 Safety equipment to DIN-EN 12828
As standard, the Suprapur KBR ... is equipped with a low
water indicator (minimum pressure switch) and boiler
drain & fill valve.
Fig. 34 Safety equipment to DIN EN 12828 for boilers
300 kW, operating temperature
105 °C
RK Boiler return
VK Boiler flow
1 Heat source
2 Shut-off valve, flow/return
3 Temperature controller (TR)
4 High limit safety cut-out (STB)
5 Temperature capturing facility
6 Diaphragm safety valve MSV 2.5 bar/3.0 bar or
7 Lift spring, safety valve HFS 2.5 bar
8 Pressure gauge
9 Low water indicator (WMS); not in systems 300 kW,
where instead a minimum pressure limiter or a replacement
measure approved by the manufacturer is provided for each
boiler
10 Non-return valve
11 Boiler drain & fill valve (KFE)
12 Expansion line
13 Shut-off valve - locked to prevent unintentional closure,
e.g. sealed cap valve
14 Drain upstream of diaphragm expansion vessel
15 Diaphragm expansion vessel (DIN-EN 13831)
1) At a shutdown temperature (STB) of 100 °C, the maximum
flow temperature would be 85 °C
The maximum flow temperature drops
through mixing to a lower temperature level
in the low loss header.
Max. boiler
flow
temperature
ΔT on
primary
side of low
loss header
ΔT on
secondary
side of low
loss header
Max. flow
temperature
for heating
system
C] [K] [K] C]
85 25
10 70
15 75
20 80
25 85
85 20
10 75
15 80
20 85
85 15
10 80
15 85
85 10 10 85
Tab. 26 Maximum possible flow temperature when using a
low loss header
6 720 619 235-119.1il
2
9
8
13
15
6/7
10
11
12
13
14
15
2
11
RK
VK
5
1)
4
1)
3
1)
1
300 kW
6 720 642 877-32.1il
49


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