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14
Installation instructions
Installing the sensors
The sensors must be arranged and installed properly for the system to function correctly. To this
end, make sure that they are completely inserted in the immersion sleeves. The threaded cable
connections provided can be used to provide strain relief. The clip-on sensors must be insulated to
protect them from being influenced by the ambient temperature. Water must be kept out of the
immersion sleeves when used outdoors (damage from freezing).
In general, the sensors may not be exposed to moisture (such as condensation water), which might
enter the cast resin and damage the sensor. If this happens, heating the sensor to 90°C for an hour
might help. When using immersion sleeves in NIRO tanks (inoxydable) or pools, pay attention to their
non-corrosion properties.
Collector sensor (red or green cable with connection box): Insert either in the tube directly
soldered or riveted to the absorber and sticking out of the collector’s frame or in a t-shaped connector
on the outer collector’s supply line collector tube. Screw an immersion sleeve with an MS (brass)
threaded cable connection (= to protect from moisture) into this T-shaped connector and insert the
sensor. To protect from lightening, the connection box has parallel overvoltage protection between the
sensor and the extension cable.
Boiler sensor (boiler supply line): This sensor is either screwed into the boiler with an
immersion sleeve or attached to the boiler’s supply line at a slight distance.
Tank sensor: The sensor that the solar power system needs should be used with an immersion
sleeve for fin coil heat exchangers just above the exchanger or, if integrated bare-tube heat
exchangers are used, on the lower third of the exchanger or the exchanger’s return line so that the
immersion sleeve is inside the exchanger’s tube. The sensor that monitors the heating of the tank
from the boiler is installed at the level of the desired amount of hot water during the heating season.
The plastic threaded cable connections provided can be used to provide strain relief. They must not
be installed below the register / exchanger.
Buffer sensor: The sensor that the solar power system needs is installed on the bottom of the
tank just below the solar heat exchanger using the immersion sleeve provided. The plastic threaded
cable connections provided can be used to provide strain relief. It is recommended that the sensor be
used between the middle and the upper third of the buffer tank using the immersion sleeve as a
reference sensor for the heater’s hydraulics or - flush with the tank’s wall - under the insulation.
Pool sensor (swimming pool): Put a T-shaped connector on the suction line immediately on the
line leading from the pool and screw the sensor in with an immersion sleeve. In the process, make
sure that the material used is non-corroding. Another option is to put the sensor on the same spot
using hose clamps or adhesive tape and to provide thermal insulation for ambient influences.
Clip-on sensor: Use pipe clamps, hose clamps, and the like must be attached to the respective
line. Make sure that suitable material is used (corrosion and temperature resistance, etc.). Then, the
sensor has to be well insulated so that the tube temperature can be taken exactly and influences from
the ambient temperature can be ruled out.
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