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Austria Email KDO 302 Manual

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Id.Nr. 235161-13
8. CORROSION PROTECTION
The enamelled boiler is protected by a magnesium rod-type anode as standard. The magnesium rod-type anode is sacricial
and must therefore be inspected every 2 years (see DIN 4753) and replaced as necessary (2/3 of the material). The degra-
dation products of the magnesium anode can precipitate as dissolved matter in the bottom area of the tank and also be
rinsed out from the tank during the water withdrawal. For the anodes to function properly, the water requires a minimum
conductivity of 150 μS/cm.
When retrotting an external current anode, ensure that all magnesium rod-type anodes (e.g. in built-in heater) are removed
to prevent interference and malfunctions of the external current anode.
See Point 12, Par. C for details on servicing the anode.
The impressed current anode has a virtually unlimited service life. Its function must be regularly monitored via the control
lights (green, yellow, red).
Warning: If the red LED is lit, no corrosion protection is active! Corrosion protection is only guaranteed if the green LED lights
up continuously.
Should the red or yellow LED light up or ash, please inform Customer Services immediately.
The connection cable of the impressed current anode may in no case be extended or cut, because otherwise a possible
polarity reversal or malfunction of the anode may occur. In addition, it is to be ensured that a permanent power supply is
ensured.
Important: All metallic components (e.g. heaters, pipe register) must be introduced in a manner that is electrically
isolated from the tank.
A missing or incomplete corrosion protection (missing anode service for magnesium anode) leads to the exclusion of
the warranty.
9. TEMPERATURE INDICATOR, THERMOSTAT FOR FEED PUMP
When installing external thermostats, ensure that the boiler temperature cannot rise above 95°C during normal operation.
10. INITIAL STARTUP
The area in which the appliance is operated must be kept below freezing.
Initial startup and heating must be monitored by a technician.
Before rst starting up and connecting to the electrical mains, the tank must be lled with water. When rst lled the outlet
valve on the tting must be opened. The water heater is completely lled when water runs out of the outlet valve with no
air bubbles. All connections, including those made on the user side (ange, anode sleeve,…) must be checked for proper
sealing when starting up. Then check the pipelines for any leakage and remedy this as needed. As described under 2. above,
the safety group as well as the valves between cold water inlet and water heater must be checked for proper function. After
inspecting the electrical fuses (circuit breakers), turn the thermostat knob (for electric upright and horizontal water heaters)
to the desired temperature setting and check for the correct temperature shut-o.
After the tank is fully heated, the set temperature, the actual temperature of the water removed and any built in temperature
indicator must closely agree (after deducting the switching hysteresis and line losses).
As the water in the tank is heated, its volume changes.
During the heat-up cycle the resulting expansion water in the internal boiler must drip from the safety valve. This dripping is
normal and may not be defeated by increased tightening of the valves.
Check for automatic shut-o of the system and any attached electric heater insert or the boiler.
Caution: The hot water outlet pipe as well as parts of the safety tting can become hot to the touch.
… 21 …


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