COMFORT FUNCTIONS
AUXILIARY BACKUP HEATING
Auxiliary backup type
Triggering conditions for auxiliary backup heating
Mode
SYSTEM 7
Pool solar
heating with
External Heat
Exchanger
R2
External heat
exchanger
MAX
(T3-T2)<dTA
ECO
SYSTEM 11
Solar system
with Heating
Return Increase
R2
Central
Heating Return
Increase
MAX
(T3-T4)<dTA
ECO
SYST11
HRI
R2
R2
R1
R1
Systems 7 & 11 do not feature electric auxiliary backup heating.
dTA = Temperature difference
Systems 3, 4 and 10 allow the connection of electric and hydraulic auxiliary back up heating
(e.g. by the means of a solid fuel boiler etc…).
Auxiliary
backup
type
Triggering conditions for auxiliary backup heating
Mode
SYSTEM 3
Solar system
with HYDraulic
and Electric
auxiliary
heating
R2 (HYD)
MAX
R1=OFF
T3<T2Set
MAX+BOOST -
R3 (ELEC)
ECO+BOOST -
R2
R1
R3
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