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Siemens Building Technologies Basic Documentation RVA63.242, RVA53.242 CE1P2373E
Landis & Staefa Division Description of heating engineer settings 26.03.2001
Switch-on point
The collector pump will be activated as soon as the following conditions are met:
− The differential of collector and storage tank temperature is greater than temperature
differential (TSdEin) and the temperature level is reached
− The maximum storage tank temperature is not reached
Switch-off point
The collector pump will be deactivated as soon as at least one of the following
conditions is met:
− The differential of collector and storage tank temperature is smaller than temperature
differential (TSdAus) or the collector temperature drops below the switch-off
temperature level (temperature level for solar + TSdAus)
− The storage tank temperatures at the bottom and at the top have reached the
maximum storage tank temperature
TSdEin
TSdAus
K6/7
Tx
TKox
°C
t
Tx MaximumSelection of actual storage tank temperature and line 162
TKox Actual value of collector temperature
TSdEin Switching differential solar on (line 160)
TSdAus Switching differential solar off (line 161)
Following points must be considered for solar applications:
• Solar setting line 98
• Sensor setting line 99
• Line 160 to 164
4.76 Maximum solar charging temperature
The maximum storage tank charging temperature is limited by operation parameter
“Maximum charging temperature”.
Setting range Unit Factory setting
20...130 °C (K) 80
The charging pump will be deactivated when the storage tank temperatures at the
bottom and at the top have exceeded the maximum charging temperature (line 163).
Process
Description
Setting
Effect
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