Parallel Buffers With Internal Tichelmann - eta SH Installation Manual

Parallel buffers with internal Tichelmann

The basic principle of the internal Tichelmann is diagonal flow; two buffers are connected together at the top
and bottom (= parallel connection). For output up to 90 kW, a connection with DN32 (ETA buffer connection
set) is sufficient, for 30 kW at least R1" or 28 mm copper. On one tank, the boiler outlet is
connected at the top; on the other the boiler return is connected at the bottom.
Log wood boiler flow
Heating circuits flow
Hot water tank flow
Oil/gas boiler flow
Oil/gas boiler return
Hot water tank return
High-temperature circuits
Log wood boiler return
Low-temperature circuits
Two parallel buffers with fresh water module and solar stratified charging
Upper buffer sensor for hot water
Log wood boiler flow
Heating circuits flow
Oil/gas boiler flow
Upper buffer sensor
Oil/gas boiler return
Middle buffer sensor
High-temperature circuits
Lower buffer sensor
+ lower solar buffer
Log wood boiler return
Low-temperature circuits
To minimise pipe circulation losses it is helpful to make the connections with downward siphon loops.
20
Two parallel buffers and conventional hot water supply
return
ETA stratified buffer SP
M
return
Buffer top solar
return
ETA stratified buffer SP
M
return
DN32
DN32
ETA stratified buffer SP
For a sufficiently large hot water reserve,
the enabling temperature should be over 45°C!!
DN32
DN32
ETA stratified buffer SP
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Buffer
Upper buffer
sensor
Middle buffer
sensor
Lower buffer
sensor
Cold water
Hot water
Solar
flow
Solar
return