Scheme 1a.
- Basic scheme for boiler instalation on closed central heating system with return flow
protection with thermic valve (group) (electrical connections and sensor are not
drawn, for details see general schemes)
bar
Scheme 1b.
- Basic scheme for boiler instalation on open central heating system with return flow
protection with thermic valve (group) (electrical connecetions and sensors are not
drawn, for details see general schemes)
above the
highest heating
body
2
2
4
3
4
3
5
6
1 - Boiler BioTec Plus
2 - Accumulation (buffer)
tank "CAS"
3 - Boiler pump
4 - Return flow protection by 3-way mixing valve with actuator (protection
valve) or by 3-way thermic valve (like Esbe LTC, VTC..., 60°C)
5 - Expansion vessel for closed heating systems
(approx. 10% of the total volume of installation)
6 - Open expansion vessel for open heating systems (OPC)
(approx. 7% of total volume of installation)
B
io
T
e
c P
lu
s
05:08
OFF
0
0.0%
0.0%
xx°C
x%
xx°C
xx°C
xx°C
xx°C
xx °C
25.0°C
20.0-0.0°C
20.0°C
-°C
xx°C
B
io
T
e
c P
lu
s
05:08
OFF
0
0.0%
0.0%
xx°C
x%
xx°C
xx°C
xx°C
xx°C
xx °C
25.0°C
20.0-0.0°C
20.0°C
-°C
xx°C
1
1
Connection to the central heating system
Technical instructions
BioTec Plus
28