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Technical information
Compress 3400i AWS – 6721852066 (2023/01)
28
Table 11 System solutions for underfloor heating, fan coils and radiators
11.3.1 Explanations of the system solutions
UF heating/ Fan coils No auto control valves
or on/off valves with
open circuits
CS3400iAWS 6-10 OR-
S
<27 - Buffer3)
27<40 Electric booster heater
on
Direct system2) or
bypass
Electric booster heater
off
Buffer3)
>40 Direct system2) or
bypass
On/off valves with no
open circuits
-Buffer
3)
No open circuits and
differential pressure
- Serial buffer3)
Radiators No auto control valves
or on/off valves with
open circuits
CS3400iAWS 4 OR-S <4 - Buffer4)
4<13
Electric booster heater
on
Direct system2) or
bypass
Electric booster heater
off
Buffer4)
>13 - Direct system2) or
bypass
On/off valves with no
open circuits
--Buffer
4)
No open circuits and
differential pressure
- - Serial buffer4)
Radiators No auto control valves
or on/off valves with
open circuits
CS3400iAWS 6-10 OR-
S
<10 - Buffer5)
10<15 Electric booster heater
on
Direct system2) or
bypass
Electric booster heater
off
Buffer5)
>15 - Direct system2) or
bypass
On/off valves with no
open circuits
--Buffer
5)
No open circuits and
differential pressure
- - Serial buffer5)
1) Buffer size must be more than 35l.
2) Direct system only if minimum volume and flow are permanetly met.
3) Buffer size must be more than 40l.
4) Buffer size must be more than 13l.
5) Buffer size must be more than 15l.
Heat distribution
system
Type of valves in
system
Outdoor unit Open system size (l) Electric booster
heater On/Off
System solution
General
SEC 20 Installation module integrated in the heat pump
module
HPC 410 Control unit
CR 10 H Room controller (accessories)
T1 Outdoor sensor
MK2 Humidity sensor (accessory)
CW1 DHW cylinder (accessory)
VW1 Diverter valve (accessory)
PW2 DHW circulation pump (accessory)
TW1 Hot water temperature sensor
Heating circuit without mixer
PC1 Circulation pump, heating circuit
T0 Flow temperature sensor
Heating circuit with mixer
MM 100 Heating circuit module (control unit for circuit)
PC1 Pump for heating circuit 2
VC1 Mixer
TC1 Flow temperature sensor, heating circuit 2, 3 ...
MC1 Thermal shut-off valve, heating circuit 2, 3 ...
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