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7.3.13 Frost protection function
When the frost protection function is activated, the solar circuit pump
is switched on as soon as the collector temperature sinks below +5 °C.
This causes heat to be pumped through the collector from the lower
part of the storage tank in an attempt to prevent the collector from
freezing.
If the collector reaches a temperature of +7 °C, the pump is switched
off again.
This function is only useful in systems without anti-freeze in the heat
transfer fluid.
The frost protection function can only be activated or deactivated.
Activating the frost protection function
"Functions" submenu selected, see "Selecting a function"
✓
(see chapter 7.3.1).
Frost protection function activated, see "Activating a function"
✓
(see chapter 7.3.1).
CAUTION
System can freeze despite the activated frost protection function!
•
During a power outage (frost protection function does not operate.)
•
In the event of a break or short circuit in a collector sensor or cable.
•
During long-term periods of frost (due to restricted water tank heat
storage).
•
If collectors are mounted in locations exposed to wind.
If frost is expected for a long period of time, only operate the system
with heat transfer fluid. It is recommended to generally use heat
transfer fluid with anti-freeze for solar energy systems.
7.3.14 Display storage tank top function
The display storage tank top function serves merely as an additional
display and has no effect on control.
"Functions" submenu selected, see "Selecting a function"
✓
(see chapter 7.3.1).
Display storage tank top activated, see "Activating a function"
✓
(chapter 7.3.1).
: press button.
The display for selecting the storage tank and the corresponding
temperature sensor appears.
SET: press button.
The upper temperature sensor flashes in the display.
: set the temperature sensor.
SET: press button to confirm.
The storage tank selection flashes in the display.
: set the storage tank.
SET: press button to confirm.
NOTE
There are two "storage tank top" settings available, which are inde-
pendent of one another.
50
EN
[..............]
[..............]
Display: 3.1
Display: 3.1
[Frost protection]
[Frost protection]
[............................]
[............................]
Display: 3.13
Display: 3.13
[Display storage tank top]
[Display storage tank top]
Display: 3.13./3
Display: 3.13./3
[Storage tank]
[Storage tank]
730.138 | 08.1
T
T
T
T
?
?
[............]
[............]
?
?
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