INSTALLATION
page 25
4.18
APPROXIMATE HYDRAULIC DIAGRAM Of ASPIROTRONIC LE WITH PUFFER
WITH FIRST PRIORITY TO HEATING SYSTEM
VRN:
Nonreturn valve
VI:
On-off valve
PB:
Boiler tube pump
V3V:
3-way valve
PI:
Heating system pump
E:
Expansion tank tube
open
VEA:
Expansion tank open
3VM:
Motorised 3-way valve
PR:
Circulating pump
VTE:
Thermal expansion valve
set at 60°C
VS:
Safety valve
VST:
Thermal relief valve
VEC:
Expansion tank closed
The approximate diagram shows an example of how the puffer can be installed in the plant. It operates as
follows:
The plant must be equipped with 2 additional feelers installed on the puffer as well as the one already
installed on the Aspirotronic panel to be inserted in the pocket on the wood-fired boiler.
First phase:
Aspirotronic LE delivers heat to the plant: the plant circulating pump (PI) is activated according
to the demands of the room temperature thermostat/s. It is enabled above 61°C if it’s room temperature
thermostat has a jumper installed and if the priority to water for household use is disabled (jumper terminal
1-4 of terminal board M2).
Its operation is similar to the plant illustrated in the diagram in paragraph 4.15.
Second phase:
If the boiler exceeds a temperature of, for example, 75°C (adjustable), we can deduce that
the temperature was reached. The pump (PR) will begin to operate above this level and start to transfer heat
from the Aspirotronic LE to the inertial puffer. This situation will continue until the fuel is finished. If, during
operation the temperature of the Aspirotronic LE drops below the temperature of the puffer the pump (PR)
will deactivate in order to prevent the puffer from dispersing heat.
Third phase:
when the fuel load is finished the wood-fired generator will be cut off by means of the 3-way
valve 3VM, the hot water will be taken directly from the puffer. The valve will switch over as soon as the
wood-fired boiler temperature drops below 55°C and then after 30 minutes. The pump PI shall be therefore
enabled to operate above 40°C and shut down at 38°C: it will not be necessary to respect the activation
threshold of the plant pump (PI) of 61°C in order to shut down the plant wood-fired boiler.
Fourth phase: when the pump stops below 38°C it will be possible to activate a traditional gas and/or diesel
oil boiler. In this case it will be necessary to use the gas/diesel oil burner terminal as a signal activation.
VS
VS
T
V
EC
V
I
V
I
scarico
scarico
V
NR
V
I
V
NR
V
I
V
I
V
3
V
V
I
P
I
V
NR
V
I
V
E
A
E
V
I
V
NR
V
I
P
B
P
R
V
I
CAUTION:
For the management of the electronic panel with this type of plant contact an authorised
Thermorossi service centre.
pag. 5
