Installation and Operating Instructions
SDC 204 1316BED035-10B-E Date 12/06
- 29 -
9.2.3 Collector protection / Re-cooling
Relevant values in menu
“Basic setting”: „Program“
0 -- 1
1 -- 120 °C
2 -- 1
3 -- 40 °C
(siehe 7.5)
---
This function can be switched on/off in the
„basic settings“ menu.
High temperatures can destroy antifreeze
liquids. Therefore, the maximum collector
temperature should be restricted.
When all storages have been loaded to the
limit, the solar pump is switched off. If the
collector temperature rises above “T
collector max”, the solar pump is switched
on, until the collector temperature drops
with 10K. Part of the energy is lost in the
pipes; the rest is loaded in the storage,
which results in increasing the storage
temperature above the adjusted maximum
storage temperature. For security reasons
the function will be interrupted if the storage
temperature reaches 95°C.
If the storage temperature is bigger
TStmax+2K and the collector temperature is
10K below TSt, then the re-cooling function
is activated. The redundant storage energy
will be released through the collector in
order to assure reserves for the next
loading cycle.
The re-cooling ends when TSt drops below
the value “re-cooling till…” in the “basic
settings” menu, point 3, or when the
collector temperature >= the storage
temperature-2K.
The re-cooling function can be active only
when the collector protection function is on.
9.2.4 System protection function
The system protection function switches the
system off if the “maximum collector
temperature” is exceeded with 10K. As
soon as the temperature drops below the
“maximum collector temperature”, the
system is started up again. This function
has higher priority and is always active,
regardless of whether the collector
protection is on or off.
9.2.5 Frost protection
This function can be switched on/off in the
„Basic settings“ menu, point 11 and the start
temperature can be adjusted in point 13.
Further on, a frost protection sensor can be
selected (T1-T6, point 12).
For systems driven without or very low
amount of antifreeze, the pipes and the
collector have to be protected from freezing.
For that purpose, the selected frost
protection sensor measures the
temperature at an exposed place, e.g. blank
pipe before the collector. If the measured
value is lower than the start temperature,
the solar pump is activated until the
adjusted frost protection start
temperature+5K is reached. The minimum
runtime of the pump is 5 minutes.
For security reasons the function is
deactivated if the temperature of the priority
storage falls below 5°C.
To Next Page
Loading...
