Ferroli ECOTRONIC Plus Manual page 93

ECOTRONIC Plus
4. Various:
Pump is overheated, but no heat transfer from the colle-
ctor to the store, flow and return have the same tempe-
rature; perhaps also bubble in the lines.
Air in the system?
no yes
Is the collector circuit
blocked at the dirt trap?
yes
Pump starts up very late
Switch-on temperature
difference DTon to large?
no yes
Non-ideal position of the coll-
ector sensor (e.g. flatscrew
sensor instead of sensor in
immersion sleeves).
yes
Air the system; in crease
the system pressure to
at least static primary
pressure plus 0,5 bar; if
necessary continue to
increase pressure; switch
the pump off and on for a
short time.
Clean the dirt trap.
Change DTon and DToff
correspondingly.
Activate tube collector
function if necessary.
o.k.
Pump starts for a short moment, switches-off, switches-on
again, etc.
Temperature difference
at the controller too
small?
no yes
Wrong position of collec-
tor sensors?
no yes
Plausibility control of
the option tube collec-
tor special function
The temperature diffrence between store and collector
increases enormously during operation; the collector
circuit cannot dissipate the heat.
Collector circuit pump
defective?
no yes
Heat exchanger calcified?
no yes
Heat exchanger blocked?
no yes
Heat exchanger too
small?
yes
Change DTon and DToff
correspondingly.
no o.k.
Mount the collector sen-
sor at solar flow (warmest
collector output); use im-
mersion sleeve of the re-
spective collector.
check / replace it
Decalcify it
Clean it
Repalce with correctly
sized one.
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