12
Configurations
2
bar
5
7
9
11
12
3
14
10
1
6
8
OK
ESC
1
2
bar
1
M
4
6
7
8
9
11
12
3
14
10
OK
ESC
13
1
Scheme 2.
- General scheme of closed central heating system with 1 accumulation tank and
DHW tank
1 - Boiler BioTec-C
2 - CAS accumulation tank
3 - DHW tank
4 - Return flow protection 3-way mixing
valve with actuator (60°C) -
RECOMMENDED
5 - Return flow protection 3-way thermic valve (
60°C
)
(VTC 531, LTC 261/271, Laddomat 21)
6 - Expansion vessel for closed systems
(min. 10% of the total volume of installation)
7 - Safety airvent unit
8 - Thermal safety valve
9 - Pump P1 (boiler pump)
10 - Pump P2 (DHW pump)
11 - Accumulation tank sensor (upper)
12 - Accumulation tank sensor (lower)
13 - Return flow sensor
14 - DHW tank sensor
2
bar
5
7
9
11
12
3
14
10
1
6
8
OK
ESC
1
- return flow protection with 3-way mixing valve
with actuator and return flow temp. sensor
- return flow protection with 3-way thermostatic
valve and return flow temp. sensor ENABLED
- return flow protection with 3-way thermostatic
valve and return flow temp. sensor DISABLED
Technical instructions REGULATION
BioTec-C