Parallel Buffers With External Tichelmann - eta SH Installation Manual

Buffer
The basic principle of the external Tichelmann is parallel flow through several buffer storage tanks, which is achieved
with diagonally alternating connection of the collectors. The last buffer on the flow collector is the first on the return
collector. To achieve uniform charging/discharging, the stub lines should be minimum one or two sizes smaller than
the collector. There is no output limit for this circuit.
Total output up to
Shut-off valves on buffer
Collector line at least
Three or more parallel buffers with hot water tank or internal water heat exchanger
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
Solar flow
Lower boiler sensor solar
Solar return
Lower buffer sensor
Log wood boiler return
Heating circuits return
Hot water tank return
Three or more parallel buffers with fresh water module and solar stratified charging
Log wood boiler flow
Heating circuits flow
Oil/gas boiler flow
Upper buffer sensor for hot water
Upper buffer sensor
Cold water
Hot water
Upper solar buffer sensor
Oil/gas boiler return
Middle buffer sensor
High-temperature circuits return
Solar flow
Solar return
Lower buffer sensor
+ buffer bottom solar
Log wood boiler return
Low-temperature circuits
return
To minimise pipe circulation losses it is helpful to incorporate siphon loops downward in the connection lines.
SH Montage
30 kW 60 kW
DN 20 DN 25
DN25 DN32
R 1"- 28x1,5 R 1¼"- 35x1,5
Hot water
M
Cold water
M

Parallel buffers with external Tichelmann

90 kW 160 kW
DN 32 DN 32
DN40 DN50
R 1½"- 42x1,5 R 2"- 54x1,5
For a small solar heating system, individual buffers can be
shut down in the summer to reduce the total volume.
300 kW 450 kW
DN 40 DN 40
DN65 DN80
R 2½"- 76x2 R 3"- 89x2
21
2012-11