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7. CORROSION PROTECTION
The annealed boiler is protected with a magnesium anode rod by default. The magnesium rod anode will wear out and
must, therefore, be checked every 2 years (see DIN 4753) and replaced when necessary (
products of the magnesium anode can condense as water content in the bottom area of the tank and can also be flushed
out when water is withdrawn from the tank. When retrofitting an external current anode, it is essential to ensure that all
magnesium rod anodes installed in the storage tank (e.g. in the case of an immersion heater) are removed in order to avoid
a fault and malfunction of the external current anode. For proper functioning of the anode, a minimum conductivity of the
water of ≥ 150 μS/cm is required.
For details about the service of the anodes, see Item 12, Paragraph C.
8. TEMPERATURE DISPLAY, TEMPERATURE REGULATION FOR CHARGE PUMP
When installing external regulators it must be ensured that the boiler temperature can not exceed 95°C during practical
operations.
9. INITIAL COMMISSIONING AND RECOMMISSIONING
The area in which the device is operated must be frost-free.
The initial commissioning and heating must be supervised by a trained professional.
Prior to initial commissioning and connection to the electrical power supply of the plant the storage tank must be filled with
water. During first filling, the outlet valve on the fitting must be opened. The hot water storage tank is completely filled when
bubble-free water flows out of the outflow pipe of the valve. All connections including those that are locked down in the
factory (flange, anode sleeve, etc.) must be checked for leaks during commissioning. Then check the plumbing for potential
leaks and repair if necessary. As listed in Item 2, the safety group as well as the valves between the cold water feed and the
hot water tank must be checked for functionality.
When the water within the storage tank is heated, its volume changes accordingly.
During the heating process, the excess water resulting in the inner boiler must drip out of the safety valve. This dripping is due
to functional reasons and may not be prevented by increased tightening of the valves.
The automatic switching off of the boiler system must be checked.
Warning: The hot water drainage pipe as well as parts of the safety fittings can get hot.
10. DECOMMISSIONING, DRAINING
Switch off the supply line switches or automatic circuit breakers.
In rooms subject to a risk of frost, the hot water storage tank must be emptied prior to the start of the cold weather season if
the device is to be unused for several days.
The draining of the domestic water is carried out once the shut-off valve has been closed in the cold water feed via the
drainage valve of the safety valve combination whilst all hot water valves of the connected operating mechanisms are
simultaneously open.
It is also possible to partially drain the system via the safety valve in the excess water funnel (drip tray). In order to do so, the
safety valve is turned to the "Test" position.
Careful: Hot water can escape when draining!
In addition, where there is a risk of frost, it is important to note that not only the water in the water heater and warm water
pipes can freeze, but that the water in all the cold water pipework leading to the operating mechanisms and to the device
itself can freeze too. It is therefore useful to drain off all water-carrying fittings and plumbing (including the heating circuit =
heat exchanger) right back to the frost protected part of the household water system (household water connection).
If the storage system is brought back into service then it is crucial to ensure that it is filled with water and that bubble-free
water emerges at the valves. In addition, the storage tank and all connections must be checked for leaks as during initial
commissioning.
Id.Nr. 248611-3
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PAW-TA20C1E5C
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