STIEBEL ELTRON SOL 25 PLUS - Manual (Page 9)

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Figure 2: Collector Temperature Sensor Well
Storage Tank
In a standard residential solar heating system, one to three
collectors are connected in series to a solar storage tank of 80-
163 gallons capacity. Refer to the tank installation instructions for
details.
Storage Tank Temperature Sensor
The temperature sensor for the SBB tanks is inserted into the sensor
well of the lower internal smooth-tube heat exchanger (only the SBB
Plus tanks have an upper heat exchanger). Coat the collector sensor
with heat-conducting paste and insert it into the sensor well until it
bottoms out. It is very important that the sensor make full contact
(without gaps or voids) to the inside of the sensor well’s walls.
Secure the sensor and its lead (e.g. cable tie).
Installation Example
A general system schematic diagram of components and pipe
arrangements for a typical Stiebel Eltron SOLKIT domestic hot water
(DHW) heating system with both solar heating and alternative
afterheating (or reheating) with a boiler is shown in
Figure 3.
Temperature sensor
with heat conducting paste
Thermal insulation
Roof outlet/duct
(corrugated hose)
Heat transfer medium
(flow direction)
Collector sensor well
Fitting
2