Water heaters are widely used in apartments, in country houses, at the enterprises and hotel complexes. And, as any other electric devices, need timely service. During technical audit or on water heater failure cause, there can be need of replacement of TENa or the magnetic anode. It is possible to make it independently, without resorting to the help of masters of the service center.
It is required to you
- screw-drivers crosswise and direct;
- wrenches (it is desirable cap) with sizes at 14/22 and 8/10;
- combination pliers;
- multimeter;
- the rags which well absorb moisture or napkins are (a lot of);
- new TEN and (or) magnesium anode.
Instruction
1. Carrying out technical audit of the water heater, it is necessary to disassemble the boiler, to check condition of TENa, the magnetic anode, to clean from scum and the accumulated silt. Such prevention will allow to prolong life cycle of the water heater and in time to warn malfunctions or to replace the failed elements.
2. If at technical maintenance and cleaning of the water heater traces of damage of protective cover of TENa have been found, it needs to be replaced with new. Also heating coil demands replacement if: the boiler is switched on, and heating of water is not carried out (in case at checking by multimeter tension is present at contacts of TENa - it is normal break); at turning on of the water heater the protection of OUZO works that speaks about leakage of current or short circuit, that is about fault of heating coil.
3. The magnesium anode is the main protection against electrochemical corrosion of metal parts of the water heater. Magnesium, in comparison with iron, interacts with water more actively. It distracts on itself(himself) oxygen atoms owing to what oxide of magnesium which drops out in deposit and is removed when cleaning the boiler is formed. Therefore atoms of iron remain untouched, the tank is not damaged by corrosion. For this reason it is necessary to watch condition of the anode and in time to change it for new. He demands obligatory replacement at wear more than 40%. Is defined visually, having compared the magnetic anode from the working boiler to new. If the type of the first has worn-out appearance – replace it.
4. Replacement of TENa in the water heater practically differs in nothing from technical audit and cleaning of scum and silt.
5. First of all, it is necessary to block water supply. Disconnect the water heater from the power supply network, having taken out fork from the socket or any other way. Using the screw-driver, remove protective cover, measure lack of terminal voltage by multimeter.
6. Further it is necessary to lower water from the water heater. If at installation of the boiler the separate faucet on input of cold water has been installed, then just you put on hose and drain water. If there is no faucet, then remove hose for supply of cold water and decant water in bucket. Previously open hot tap for intake of air in tank. Now it is possible to remove the boiler from wall if there is such need.
7. We start detachment of wires. Not to mix wire at their connection, write down what color wire from where have disconnected. Now it is possible to remove TEN. It fastens, as a rule, by means of 6 bolts. Depending on model, fastening can differ. It is necessary to turn off bolts in turn and slowly as in tank there was a little water, silt and scum. All this needs to be decanted accurately in basin. Having taken out TENy, it is necessary to clean tank from the gathered dirt, using rags and napkins and to leave for drying-out.
8. Further it is necessary to make replacement of TENa and, if necessary, replacement of the magnetic anode by new then to collect upside-down, using the records of connection of terminals. Also, it is necessary to check hermetic laying at TENa basis. If it has cracked or was rumpled, it is necessary to replace it with new, otherwise the electric device will leak.
9. Having connected electric part, it needs to be double-checked. Having fixed protection, it is necessary to connect hoses and to try supply of cold water, previously having opened the crane of exit of hot water. Not to turn on the water heater in the power supply network yet! In process of filling of the boiler with water, it is necessary to trace tightness until from the "hot" crane air ceases to come out. If the leak was not found, it is possible to connect the boiler to the power supply network.