STIEBEL ELTRON SOM 6 PLUS - Manual (Page 16)

16
CMN:
Collector minimum temp.
Adjustment range:
50 ... 190 °F
[10 ... 90 °C]
in steps o
f 1 °Ra [0.5 K]
Factory setting:
50 °F
[10 °C]
Collector minimum limitation option
OCN:
Collector minimum limitation
Adjustment range: OFF / ON
Factory setting: OFF
If the collector minimum limitation option is activated, the
pump (R1) is only switched on if the adjustable collector
minimum temperature is exceeded. The minimum temperature
prevents the pump from being switched on too often at low
collector temperatures. A fixed hysteresis of 10 °Ra [5 °K] is
set for this function
If the collector minimum limitation is active,
(flashing) is
shown on the display.
Antifreeze option
OCF:
Antifreeze function
Adjustment range: OFF / ON
Factory setting: OFF The antifreeze function activates the loading circuit between
the collector and the tank when the temperature falls below
the adjusted antifreeze temperature. This will protect the fluid
against freezing or coagulating. If the adjusted antifreeze
temperature is exceeded by 2 °Ra [1 K], the loading circuit
will be deactivated.
When the antifreeze function is activated,
is shown on the
display. If the antifreeze function is active, and (flashing)
are shown on the display.
Note:
Since this function uses the limited heat quantity
of the tank, the antifreeze function should be used
in regions with few days of temperatures around
the freezing point.
The antifreeze function will be suppressed if the
tank temperature falls below 40 °F [5 °C] in order
to protect the tank from frost damage.
CFR:
Antifreeze temperature
Adjustment range:
-40.0 ... +50.0 °F
[-40.0 ... +10.0 °C]
in steps o
f 1 °Ra [0.5 K]
Factory setting:
40.0 °F [4.0 °C]
Tank cooling function When the tank cooling function is activated, the controller aims
to cool down the tank during the night in order to prepare it for
solar loading on the following day.
If the adjusted maximum tank temperature
S MX is exceeded
and the collector temperature falls below the tank temperature,
the system will be reactivated in order to cool down the tank.
Cooling will continue until the tank temperature has fallen
below the adjusted maximum tank temperature
S MX again. A
fixed hysteresis of 4 °Ra [2 K] is set for this function.
Reference threshold temperature differences for the tank
cooling function are
DT O and DT F.
If no DHW consumption is expected for a longer period of
time, the additional holiday cooling option
OHOL can be
activated in order to extend the tank cooling function. The
adjustable temperature
THOL then replaces the maximum
tank temperature S MX as a switch-off temperature for the
tank cooling function.
When the holiday cooling function is activated
, and
(flashing) are shown on the display.
While the holiday cooling function is active,
, and
(flashing) are shown on the display.
OSTC:
Tank cooling option
Adjustment range: OFF / ON
Factory setting: OFF
THOL:
Holiday cooling temperature
Adjustment range:
70 ... 175 °F
[20 ... 80 °C]
in steps of 1 °Ra [1 K]
Factory setting:
110 °F [40 °C]
OHOL:
Holiday cooling option
Adjustment range: OFF / ON
Factory setting: OFF
Note:
If
OSTC or OCF is active, the collector minimum
function will be overridden. In that case, the
collector temperature may fall below
CMN.