Operation manual of solar controller SR658
Page 54 of 105
In systems with east- / west collectors two separate menus (
COL
and
COL 2
) will be
displayed.
OCMI (2) Collector minimum temperature
The minimum collector temperature is the lowest switch-on temperature for triggering the
solar pump R1(2), If the collector temperature falls below the minimum temperature, is
displayed.
OCFR (2) Collector antifreeze function
When the collector temperature falls below the switch-on temperature
CFRO
of antifreez
e
function, this function activates the solar pump to circuit system between collector and tank.
This will protect the fluid against freezing or coagulating. If collector temperature rises and
exceeds the switch-off temperature
CFRF
of anti-freeze function,
the solar pump will be
switched off.
If collector antifreeze function is activated, is displayed on the screen.
If collector antifreeze function is running, are blinks on the screen.
Note:
In systems with east- / west collectors 2 separate menus (
COL
and
COL 2
) will
be displayed.
Note:
Since this function uses the limited heat quantity of the tank, the antifreeze
function should be used only in regions with few days of temperatures around the
freezing point.
OTCO (2) Tube collector function
This function is used for improving the switch-on behavior in systems with non-ideal sensor
positions (e. g. with some tube collectors).
This function operates within a pre-set time - section. It activates the collector circuit pump
R1(2) intermittently to compensate for the delayed temperature measurement caused by
poor sensor position.
If the runtime is set to more than 10s, the pump will run at 100% speed during the first 10s,
