STIEBEL ELTRON SOM 6 PLUS - Manual (Page 15)

15
CMX:
Maximum collector temp.
Adjustment range:
150 ... 320 °F
[70 ... 160 °C]
in steps of 1 °Ra [1 K]
Factory setting:
230 °F [110 °C]
Collector cooling function
When the collector cooling function is activated, the controller
aims to keep the collector at an operational temperature.
When the adjusted maximum tank temperature is reached,
solar loading stops. If the collector temperature increases to
the adjusted maximum collector temperature, the solar pump
is activated until the collector temperature falls at least 10 °Ra
[5 K] below the maximum collector temperature. The tank
temperature may increase (subordinate active maximum tank
temperature), but only up to 200°F [95 °C] (emergency shutdown
of the tank).
If the collector cooling function is active,
and (flashing)
is shown on the display.
OCC:
Option collector cooling
Adjustment range: OFF / ON
Factory setting: OFF
Note:
This function will only be available if the system
cooling function (
OSYC) is deactivated.
When the system cooling function is activated, the controller
aims to keep the solar system operational for a longer time.
The function overrides the maximum tank temperature to
provide thermal relief of the collector field and the heat
transfer fluid on hot days.
If the tank temperature is higher than the maximum tank
temperature
S MX and the switch-on temperature difference
DTCO is reached, the solar system remains activated. Solar
loading is continued until either the tank temperature
reaches 200 °F [95 °C] (emergency shutdown of the tank), the
temperature difference falls below the adjusted value
DTCF or
the collector emergency shutdown temperature EM is reached.
If the system cooling function is active, and (flashing) is
shown on the display.
System cooling function
OSYC:
Option system cooling
Adjustment range: OFF / ON
Factory setting: OFF
DTCO:
Switch-on temperature diff.
Adjustment range:
2.0 ... 60.0 °Ra
[1.0 ... 30.0 K]
in steps of 1 °Ra [0.5 K]
Factory setting:
40.0°Ra [20.0 K]
DTCF:
Switch-off temperature diff.
Adjustment range:
1.0 ... 59.0 °Ra
[0.5 ... 29.5 K]
in steps of 1 °Ra [0.5 K]
Factory setting:
30.0 °Ra [15.0 K]
Note:
This function will only be available if the collector
cooling function (
OCC) is deactivated.
Cooling functions
Note:
The cooling functions will not become active as long
as solar loading is possible.
Below, the three cooling functions – collector cooling, system
cooling and tank cooling – are described in detail. The
following note is valid for all three cooling functions: