Cosmo Multi 3 Montage- Und Bedienungsanleitung Seite 141

7. SOLAR
Holiday function
Solar / Holiday function
Adjustment
Description
channel
Cooling Cooling logic variant
TColmax. Collector maximum temper-
ature
Store (1 ... 4) Store succession order
St. cooling Store cooling option
Switch-on temperature
DTOn
difference
Switch-off temperature
DTOff
difference
Stmax (1...4) Store cooling temperature
Heat dump Store heat dump
Output Output selection
Sensor Sensor selection
TStoreOn Switch-on temperature
TStoreOff Switch-off temperature
The holiday function is used for operating the system when no water consumption is expect-
ed, e.g. during a holiday absence. This function cools down the system in order to reduce the
thermal load.
Only if the holiday function has been activated with the parameter Days of absence will the
adjustments described in the following become active.
The parameter Days of absence can be used for entering the number of days for a holiday
absence.
Î In order to adjust the days of absence, press and hold down button ➆ for 5 s.
If the parameter is set to a value higher than 0, the function becomes active using the adjust-
ments that have previously been made in the Holiday function menu. The days will be counted
backwards at 00:00. If the value is set to 0, the function is deactivated.
The remaining days of absence are displayed in the status menu and can be changed there later
on.
2 cooling functions are available: System cooling, collector cooling
System cooling type
If the switch-on temperature difference is exceeded, the stores continue to be loaded even if
their corresponding maximum temperature is reached, but only up to the emergency shutdown
temperature. Store loading continues until all stores have reached the emergency shutdown
temperature or until the switch-off temperature difference is reached.
Collector cooling type
If the collector maximum temperature is exceeded, the stores will be loaded above their respec-
tive maximum temperature.
Store loading continues until all stores have reached the emergency shutdown temperature or
until the collector temperature falls below the collector maximum temperature by at least 5 K.
The control logic regards collector cooling operation as solar loading. The adjusted values for
delay, minimum runtime, etc. remain valid.
Additionally to each of the two variants, the store cooling can be activated.
Store cooling option
When the store cooling option is activated, the controller aims to cool down the store during the
night in order to prepare it for solar loading on the following day.
The store cooling option is active, if the maximum store temperature is exceeded. If, in addition
to that, the collector temperature falls below the store temperature, the solar pump switches
on. The solar pump remains active until the store temperature falls below the adjusted maxi-
mum store temperature.
The store order for the cooling is the same as in the overheating through system- or collector
cooling.
Adjustment range /
Factory setting
selection
Col. cool., Syst. cool., Off
Off
70 ... 190 °C 100 °C
system dependent system dependent
Yes, No Yes
1.0 ... 30.0 K 20.0 K
0.5 ... 29.5 K 15.0 K
4 ... 95 °C 40 °C
Yes, No No
system dependent -
system dependent -
5 ... 95 °C 65 °C
4 ... 94 °C 45 °C
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