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in a mountain shelter or in a garden house. In this case it is to be considered that the dimensioning of
the system or the hot water usage behavior should be aligned in such a way that the storage water
temperature of 60°C will be achieved once in a week for the Legionella protection.
The pipes of screwing in heating element consist of a high corrosion resistant of special alloy. In order
to guarantee the possibly long life, we recommend the usage of processed, softened heating water as
per VDI2035.
While operating the screwing in heating element in drinking water storage, it is to be calculated as per
the hardness grade of the drinking water with the strong lime deposits on the heater rod. So that the
life of the screwing in heating element can be considerably shorten. In order to avoid this, we
recommend the following in case of drinking water storage:
Never configure the maximum temperature of AE PV Heater DCLV above 60°C.
Clean the warm water storage every two years using the revision opening of depositions and
sediments.
2.3 Qualification of the Personnel
The screwing in heating element should be installed only by qualified heating engineers. The heating
engineer should be enough familiar with the fitting, installation and operation of the product as well as
all the warnings and security measures as per this operation manual. They should have proper
security equipments and should be the first one to help.
2.4 Operating Temperature
The Messing-Nipple can increase the temperature of the storage water. The maximum water
temperature for the screwing in heating element is 85°C.
The primary heating system (especially important in case of solid boilers) should not heat up the
water above the maximum temperature of 85°C on screwing in heating element of AE PV Heater
DCLV at any point of time. Temperature more than 85°C can lead to the safety shutdown of the
device.
After the safety shutdown the device is switched off for the remaining day. If the safety shutdown
takes place for 7 consecutive days, then the device can be start up again only by the customer
service.
2.5 Structure of Hot Water Storage
The maximum operating pressure for the screwing in heating element includes 10 bars.
An exceeding of the maximum pressure by obstacles in the flowing system should be closed
immediately.
The screwed coupling should be shorter than the unheated zones of heating rod, in order to prevent
the overheating and corrosion of the screw-in heating element.
2.6 Disclaimer
There are general conditions for the deliveries and services of REFUsol GmbH.
REFUsol GmbH does not take the responsibility of the damage in terms of not following the
warnings in this installation manual or usage beyond the approved usage.
The PV Heaters have water as well as the electrical contact. Any changes with exception of
the allowed exchange of heating rod with an original REFUsol- additional heating rod
(subsequent: changes) on the PV Heaters are endangered, therefore their secured function
and possible damages are covered. Especially it threatens the life risk in case of changes on
