Regulus Ashburn KPI1, Инструкция по установке и эксплуатации, Страница: 25 / 28

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Flushing and fi lling
For safety reasons, you should only fi ll the collectors when there is no direct irradiation from the sun (or cover the collec-
tors). Especially in regions exposed to frost, for fl at plate collectors you should use SOLARTEN SUPER antifreeze fl uid.
The solar thermal system should be fi lled and commissioned within one week of installation, because heat build-up in the
collector (array) can damage the fl at gaskets in empty systems. If this is not possible, the fl at gaskets should be replaced
before commissioning to prevent leakage.
Recommended antifreeze for fl at plate collectors: SOLARTEN SUPER
It may not be possible to completely empty collectors once they have been fi lled. For this reason, collectors exposed
to frost should only be fi lled with antifreeze fl uid, 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 fl ow. To ensure optimal
contact between the sensor and the surrounding environment, the gap between the sensor sleeve and the sensor ele-
ment should be
fi 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 fi 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 fl uid!
Only operate the bleeding valve if the temperature of the heat transfer fl 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 fl uid
The heat transfer fl uid must be checked every two years with regard to its antifreeze and pH value.
- Check antifreeze using antifreeze tester and replace or re fi ll if necessary!
The target temperature for Solarten Super is -32°C
- 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 fl 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.
Operating tips - Solar power system