IDEAL Solar Thermal

43
INSTALLATION
Solar Thermal - Installation and Servicing
INSTALLATION
38 OPERATING TIPS (TS8000 & TS8001)
Flushing and Filling
For safety reasons, you should only ll the collectors when there is no direct irradiation from the sun (or cover thecollectors).
Especially in regions exposed to frost, for at plate collectors you should use a mixture of (FS) antifreeze with water (40%
antifreeze). The solar thermal system should be lled and commissioned within one week of installation, because heat build-
up in the collector (array) can damage the at gaskets in empty systems. If this is not possible, the at gaskets should be
replaced before commissioning to prevent leakage.
Attention: Antifreeze that is not pre-mixed must be mixed with water prior to lling!
Recommended antifreeze for at plate collectors: TYFOCOR-L
40% proportion of antifreeze (60%/water) - freezing point: -22° C/solidication point: -26° C
50% proportion of antifreeze (50%/water) - freezing point: -32° C/solidication point: -44° C
It may not be possible to completely empty collectors once they have been lled. For this reason, collectors exposed to frost
should only be lled with a water/antifreeze mixture, also for pressure and function tests. Alternatively, the pressure test can
also be carried out using compressed air and leak detection spray.
Installing the Temperature Sensor
The temperature sensor should be installed in the sensor sleeve nearest to the collector array ow. To ensure optimal contact
between the sensor and the surrounding environment, the gap between the sensor sleeve and the sensor element should be
lled with a suitable conducting compound. All materials used for installing temperature sensors (sensor element, conducting
compound, cables, sealing and insulating materials) must be suitably temperature resistant (up to 250° C).
Operating Pressure
The maximum operating pressure is 10 bar.
Bleeding
The system must be bled:
- when commissioning the system (after lling the collectors)
- 4 weeks after commissioning
- when necessary, e.g. if there are malfunctions
Warning: Risk of scalding due to steam and hot heat transfer uid!
Only operate the bleeding valve if the temperature of the heat transfer uid is < 60° C.
When bleeding the system, the collectors must not be hot! Cover the collectors and, if possible, bleed the system in the
morning.
Check Heat Transfer Fluid
The heat transfer uid must be checked every two years with regard to its antifreeze and pH value.
- Check antifreeze using antifreeze tester and replace or rell if necessary!
Target value is ca. - 25° C and - 30° C depending on climatic conditions.
- Check pH value with a pH indicator rod (target value approx. pH 7.5):
If the limit pH value is less than ≤ pH 7, replace the heat transfer uid.
Maintenance of the Collector
The collector or the collector array must be inspected visually, once a year, for any damage, leaks and contamination.
Additional recommendations on operation and maintenance can be found in the supplier’s general documentation and
instructions on commissioning and maintenance.
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