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Verfügbare Sprachen
Verfügbare Sprachen
SLA2
5. Annex: Fault fi nding
Pump is overheated, but no heat transfer from collector
to the store, feed flow and return flow are equally warm,
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 and soon stops working soon.
Switch-on-temperature
difference ∆T
too large
on
no
yes
Collector sensor unfavour-
able placed (e.g. contact
sensor instead of immersion
sleeve sensor?
yes
|
10
Vent system; increase sys-
tem pressure to at least
static primary pressure
plus 0,5 bar; if necessa-
ry continue to increase,
switch the pump for a
short time off and on.
Clean the dirt trap
Change ∆T
and ∆Toff
on
accordingly.
If necessary activate tube
collector function.
o.k.
Pump starts for a short moment, switches-off, switches-on
again, etc. („controller hunting")
Is the temperature dif-
ference at the controller
too small?
no
yes
Wrong position of the
collector sensor?
yes
The temperature difference between store and collector
increases enormously during operation; the collector cir-
cuit cannot dissipate the heat.
Collector circuit pump
defect ?
no
yes
Heat exchanger calci-
fied??
no
yes
Heat exchanger blocked?
no
yes
Heat exchanger too
small?
yes
Change ∆T
and ∆Toff
on
accordingly.
no
o.k.
Mount the collector sen-
sor at solar flow
warmest collector out-
put);
Conrtol / replacement
Decalificatiom
Cleaning
New calculation of the
dimension.
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