eta PE-K 35, Installation Manual

Page: 22 / 60

22 www.eta.co.at
Subject to change due to technical improvements
Parallel buffers with internal Tichelmann Buffer
Parallel buffers with internal Tichelmann
Cold water
Hot water
Solar flow
Solar return
Wood chip/pellet boiler return
DN32
DN32
ETA stratified buffer SP ETA stratified buffer SP
Upper
buffer sensor
Upper
buffer sensor
Wood chip/pellet boiler flow
Heating circuits flow
Hot water tank flow
Oil/gas boiler flow
Hot water tank return
Low-temperature circuits return
Oil/gas boiler return
For a sufficiently large hot water reserve, the enabling
temperatures of the heating circuits should be over 45°C!
Ret
ur
n li
nes
w
ith st
ron
gly d
iff
er
in
g t
emper
at
ur
es
should be f
ed i
nt
o t
he buff
er
st
or
ag
e t
ank
se
par
at
ely
.
To minimise pipe circulation losses it is helpful to make the connections with downward siphon loops.
DN32
DN32
ETA stratified buffer SP ETA stratified buffer SP
Upper buffer sensor
Lower buffer sensor
Buffer bottom solar
Wood chip/pellet boiler flow
Heating circuits flow
Oil/gas boiler flow
High-temperature circuits return
Low-temperature circuits return
Oil/gas boiler return
Ret
ur
n li
nes
w
ith st
ron
gly d
iff
er
in
g t
emper
at
ur
es
should be f
ed i
nt
o t
he buff
er
st
or
ag
e t
ank
se
par
at
ely
Two parallel buffers and conventional hot water supply
Two parallel buffers with fresh water module and solar stratified charging
Buffer top solar
Upper buffer sensor for hot water
Wood chip/pellet boiler return
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.