25
Warning
This anti-Legionella function does not provide complete protection against
Legionella, because the controller is dependent on sufficient energy being
fed in, and it is not possible to monitor the temperatures in the entire
range of the storage tanks and the connected piping system. To provide
complete protection against Legionella bacteria, it must be ensured that
the temperature is raised to the necessary temperature, and at the same
time there must be water circulation in the storage tank and piping system
by means of other additional energy sources and external control units.
Protective functions
Protection of the highest priority
Protection of the solar circuit protects its components from overheating. If
“SP T on”
is exceeded at the collector for over 1 minute, the pump is switched off. The collector
is left at high temperature. The pump is activated again when the temperature drops
below
“SP T off”
.
Setting range: Solar circuit protection: ON, OFF / Default setting: ON
Setting range: SP T on 60 °C to 150 °C / Default setting: 120 °C
Setting range: SP T off 50 °C to SP T on – 5°C / Default setting: 115 °C
Protective functions
Warning
Collectors do not get cooled and stay heated. This may result in limited
lifetime of the solar
fl
uid. If you use this function, please check your solar
fl
uid regularly!
If
“CP T on”
is exceeded at the collector sensor, the pump is switched on in order
to cool the collector down. The pump turns off when the collector temperature drops
below
“CP T off”
or the temperature
“Storage (X) maximum”
is exceeded in the
storage tank or swimming pool. In systems with 2 storage tanks only the lower-priority
tank or pool is used for collector cooling.
Setting range: Collector protection: ON, OFF / Default setting: OFF
Setting range: CP T on 60 °C to 150 °C / Default setting: 110°C
Setting range: CP T off 50°C to to CP T on – 5 °C / Default setting: 100°C
Setting range: Storage (X) maximum 30 °C to 140 °C / Default setting: 90 °C
* (x) is the storage tank number
Danger
When this function is active, a storage tank or swimming pool may get
heated up to “Storage (X) maximum”, over Tmax S2 (see 4.2. - Tmax S)
which might cause damage to the system.
5.3. - Collector protection
5.2. - System protection
5.4. - Recooling
At the end of a sunny day the temperature in a storage tank may easily reach high values. In
order to prevent further temperature increase the next day, excess energy can be released
into the air via collectors under cloudy conditions or after sunset.
