Hydraulic Integration - eta SH Installation Manual

Hydraulic integration

For the largest possible buffer storage capacity and for
maximum solar yield even in winter, low return
temperatures are the goal.
The best stratified buffer can't unmix what has been mixed
by heat distributors. Especially in houses where radiators
and underfloor circuits are present, no mixing heat
distributors should be installed, the returns should be
connected directly to the buffer. An underfloor heating
system can still be operated with the return from radiators.
With conventional hot water supply
Log wood boiler flow
Heating circuits flow
Hot water tank flow
Oil/gas boiler flow
Upper buffer sensor
Oil/gas boiler return
Middle buffer sensor
Hot water tank return
Log wood boiler return
Heating circuits return
Lower buffer sensor
With solar exchanger and fresh water module
Upper buffer sensor for hot water
Upper buffer sensor
Cold water
Hot water
Log wood boiler flow
Heating circuits flow
Oil/gas boiler flow
Oil/gas boiler return
Middle buffer sensor
Solar flow
High-temperature circuits return
Lower solar buffer sensor
Solar return
Log wood boiler return
Low-temperature circuits return
Lower buffer sensor
18
M
ETA stratified buffer SP
M
ETA stratified buffer Solar SPS
If a solar heating system is connected, only the cold
returns from an underfloor heating system or from a fresh
water module may be fed into the solar-heated lower third
of the buffer. This results in lower solar panel working
temperatures with significantly higher efficiencies and also
significantly higher solar yield.
An oil or gas boiler should always be connected only
above the upper quarter of the buffer.
With a start relief the house will get warm faster when
the heating is switched on.
Siphon loops downward at all connections avoid heat
losses in summer.
Upper buffer sensor for hot water
Upper buffer sensor
Cold water
Hot water
Log wood boiler flow
Heating circuits flow
Oil/gas boiler flow
Oil/gas boiler return
Middle buffer sensor
High-temperature circuits return
Log wood boiler return
Low-temperature circuits return
Lower buffer sensor
With stratified charging module and fresh water module
Upper buffer sensor for hot water
Upper buffer sensor
Cold water
Hot water
Log wood boiler flow
Heating circuits flow
Oil/gas boiler flow
Upper solar buffer sensor
Oil/gas boiler return
Middle buffer sensor
Solar flow
Solar return
High-temperature circuits return
Log wood boiler return
Low-temperature circuits return
Lower buffer sensor
+ lower solar buffer
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With fresh water module
M
ETA stratified buffer SP
M
ETA stratified buffer SP
Buffer