
Scheme 8.
- General scheme of closed central heating system with 1 accumulation (buffer) tank,
heating system behind accumulation (buffer) tank, 2 heating circuit with 3-way
mixing valve (one with actuator, other manually operated).
NOTE:
- According to this scheme is possible to preform version with heating system in front accumulation
(buffer) tank.
- According to this scheme is possible to preform version for open central heating system
(see point 6.0, Connection to the central heating system).
- Actuator can be installed only on position „J” or position „3” and noway on any other positions.
D
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
Terminal Block
P1
P2
P3
D
bar
5
2
3
P1
A
B
B
A
E
E
T
T
P3
J
H
I
F
T
T
K
I
G
CIRCUIT 1
CIRCUIT 2
P2
F
H
G
Connected to the boiler
electronics
Mixing valve
actuator
1 - Boiler "BioTec Plus".
2 - "CAS" accumulation (buffer) tank
3 - Return flow protection (3-way mixing valve with actuator
(protection valve) or 3-way thermic valve (
60°C
),
VTC 512, VTC 531, LTC 261, LTC 271)
4 - Expansion vessel for closed systems (min. 10% of the total
volume of installation)
5 - Safety airvent unit
6 - Thermal safety valve
*
*
*
*
*
P1 - Pump P1 (boiler pump)
P2 - Pump P2 (heating pump circuit 2)
P3 - Pump P3 (heating pump circuit 1)
A - Accumulation (buffer) tank sensor (upper)
B - Accumulation (buffer) tank sensor (lower)
C - Return flow temperature sensor
D - Outdoor temperature sensor
E - Flue gas temperature sensor
F - Main flow temperature sensor
G - Room thermostat
H - Room corrector (CSK)
I - Heating circuit
J - 3-way mixing valve with actuator or manual
3-way mixing valve
K - Manual 3-way mixing valve
*
*
*
*
*
*
*
*
Not included in delivery of boiler BioTec Plus (need additional order)
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
4
6
1
**
**
Can be used only if it’s on position „J” installed actuator
C
***
***
Can be used only if it’s on position „3” installed actuator
General connection schemes
Technical instructions
BioTec Plus
37