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9.3. General connection diagrams for a system with "puffer" or "puffer combi" tank
A system with "puffer" or "puffer combi" tank can be divided in the following parts:
1. Boiler delivery side temperature sensor (S4): is located in its receptacle close to the boiler water delivery
connection (A6) and is used by the electronic control to decide whether and when the boiler must pass
from a step to another and to activate the various pumps.
2. Boiler return side temperature sensor (S5): is located in its receptacle close to the boiler water delivery
connection (A7) and is used by the electronic control to activate or deactivate the bypass pump (PR).
3. "Puffer" tank temperature sensor - top side (S3): is inserted in its case located in the top side of the puffer
tank and easy used to control the puffer tank pump (PB) and the heating system circulation pump (PI).
4. "Puffer" tank temperature sensor - bottom side (S2): is inserted in its case located in the bottom side of
the puffer tank and easy used to control the puffer tank pump (PB) and the solar panels pump (PS).
5. Solar panels temperature sensor (S1): is located onto the solar panels hot water outlet and is used to
control the solar panels pump (PS).
6. Heating system circulation pump (PI): is ready to be activated when the temperature reaches the value
TH-HEATING-SYS-PUFFER[A01], but will be really turned on if the room thermostat asks for other heat.
It remains steady on, independently from the room thermostat, in case of antifreeze alarm (boiler delivery
side water temperature value less than TH-BOILER-ICE[A00]), or in case of anti thermal inertia operation
(boiler delivery side water temperature value bigger than TH-BOILER-SECURITY[A04]).
7. Bypass pump (PR): is ready to be activated when the temperature reaches the value TH-BYPASS-
PUMP[A14], but will be really turned on only if the boiler delivery side water temperature value will be
bigger than that of the return side by a difference equal to DIFFERENCE FOR BYPASS [d00] in the
protected menu. It remains steady on in case of antifreeze alarm (boiler delivery side water temperature
value less than TH-BOILER-ICE[A00]) or in case of anti thermal inertia operation (boiler delivery side
water temperature value bigger than TH-BOILER-SECURITY[A04]).
8. "Puffer" tank pump (PB): is ready to be activated when temperature reaches the value TH-PUMP-
BOILER[A15], but will be really activated only if the top side hot sanitary water storing tank temperature
is below the value TH-PUFFER-ON[A32]. The pump will be driven off when the top side hot sanitary
water storing tank temperature reaches the value TH-PUFFER-OFF[A48]. The pump will remain steady
on, independently from the room thermostat, in case of antifreeze alarm (boiler delivery side water
temperature below the value TH-BOILER-ICE[A00]) or in case of anti-thermal inertia operation (boiler
delivery side water temperature higher than TH-BOILER-SECURITY[A04]).
9. Solar panels pump (PS): will be turned on if the solar panels collector water temperature is higher than
that of the bottom part of the hot sanitary water storing tank by a difference equal with the value of
DIFFERENCE FOR SOLAR[d16] of the protected menu. If the hot sanitary water storing tank top side
water temperature reaches the value TH-BOILER-SICUR[A35], for security reasons the pump will be
turned off. In case of solar panels antifreeze alarm (solar panels water temperature below the value TH-
SOLAR-ICE[A48]) the pump will be turned on periodically with pause times equal with the value TIME
SOLAR ICE OFF[t37] and working times equal with the value TIME SOLAR ICE ON[t36].
Summary of Contents for ASPIRO DUO TECH
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