Scheme 10
. - General scheme of closed central heating system with 1 accumulation (buffer) tank,
hydraulic crossover behind accumulation (buffer) tank, 2 heating circuits with 3-way
mixing valve with actuator managed by CM2K module, DHW preparing.
*
F - CM2K module (can be expanded to
max. 4 units connected in series)
G - 3-way mixing valve with actuator
or manual 3-way mixing valve
H1 - Room corrector 1 (CSK)
(1x room corrector CSK included
in basic boiler delivery)
H2 - Room corrector 2 (CSK)
I - Heating circuit
J - Main flow temperature sensor in
circuit CM2K (
must be
installed with
3-way mixing valve with actuator)
K - Heating pump (managed by CM2K)
L - Return flow temperature sensor
*
*
*
*
*
T
T
3
2
P1
D
bar
6
A
C
T
T
T
T
K
K
G
G
H1
H2
I
I
J
J
4
CM2K
M
8
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
Terminal Block
P1
P2
P3
7
F
5
B
B
A
C
D
M
P3
P2
*
*
E
E
*
Not included in delivery of boiler BioTec Plus or CM2Kmodule (need additional order)
Included in basic delivery of CM2K module
**
NOTE:
- According to this scheme is possible to preform version for open central heating system
(see point 6.0, Connection to the central heating system).
- It's possible to expand system of heating circuit lead by CM2K module with installing additional
CM2K modules (max. 3 pcs) in serial connection.
Managed with CM2K module
Connected to the boiler
electronics
P1 - Pump P1 (boiler pump)
P2 - Pump P2 (DHW pump)
P3 - Pump P3 (hydraulic crossover pump)
A - Accumulation (buffer) tank sensor (upper)
B - Accumulation (buffer) tank sensor (lower)
C - DHW sensor (domestic hot water)
D - Outdoor temperature sensor
E - Flue gas temperature sensor
M - Hydraulic crossover sensor
(delivered as flow temperature sensor)
*
*
*
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 - Sanitary water tank
(SKB-Digi/LKB-Digi/TB/STB)
6 - Safety airvent unit
7 - Thermal safety valve
8 - Hydraulic crossover
*
*
*
*
*
*
*
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
L
***
Can be used only if it’s on position „3” installed actuator
***
L
General connection schemes
Technical instructions
BioTec Plus
39