An interesting video is walking around the net with the option of self-installing a water heater. Wonderful movie! Owners of water heaters cleaning the device from salt deposits gives a lot of trouble. The reason - the magnesium anode does not work without waste. Being a donor, collapses, forming a suspension. Plays a role and traditional scum, reinforcing effect. Even in areas with a number of rigidity close to one( for example, the Amur Region), the owners of water heaters will make sure that it is necessary to clean the tank every six months, and it is impossible to operate without a magnesium anode. Now in order.
Magnesium anode of the heater and proper installation of the device
It was necessary to see in the network, on YouTube video, the operation of the owners of the heater without a magnesium anode. The water is not hard, there is no scum, which means that there is no need to buy an extra spare part, consider gardeners. It is not that simple. Magnesium anode interacts with salts of magnesium and calcium, but the main thing in another. Read the SNiP on the laying of heating systems. It is written in black and white:
Copper radiators and other structures from the third-sample Olympic metal lie downstream of steel and aluminum.
Why this is done. .. This is how a phenomenon well known to aviators is blocked. In aircraft manufacturing, aluminum is used — a metal that constantly falls victim to electrochemical corrosion. Two metals without water coexist peacefully. But only the wing crashes into the clouds, and an intensive exchange of electrical character in a conducting medium begins. The potentials of the metals are determined by the degree of electronegativity, and current flows in the water. The first conductor enrolled as a donor, the second as an acceptor. The donor is destroyed, with the recipient everything is in order( in an ideal environment would be covered with the thinnest layer of the donor, as it happens in the plants during electrolysis).Magnesium stands on one edge in a range of metal potentials. Serves as a donor, saving your opponent.
What do the owners do when the magnesium anode is removed from the water heater? They create the conditions for the destruction of their own water supply. For example, the heating element is made of copper, and the steel mixer. .. The crane is slowly collapsing. It is more dangerous in the absence of a magnesium anode to scratch the enamel of the tank to the steel wall. It turns out - the area of copper PETN exceeds a strip of stripped enamel. The effect of electrical corrosion is enhanced, which leads to tank squandering, the need for repairs that are not covered by the warranty case. The service will quickly determine the cause of the breakdown, and the repair will be refused. You have to open the case yourself( which is not suitable for this), tear off the insulation from polyurethane foam, brew the joint, passivation from inside.
Why not work through the hole for the installation of heating elements? If in the house a welder is a woman with a thin hand and eagle eyesight, capable of seeing through a crack and at the same time wielding an electrode or torch, then of course. After work, passivate the seam. How to do, as we have already said, the whole review is devoted to post-processing the surface of the tank. Without this, the process of electrochemical corrosion starts anew. By the way, galvanized steel gets on with copper. But the protective layer must be from the inside of the pipe. Conclusion: the correct self-installation of the water heater is carried out with plastic or galvanized steel pipes, which, by the way, is demonstrated on video in Youtube. This is the first.
Secondly, do not operate the water heater without a magnesium anode. Before installation, make sure - the protective element( comes in conjunction with heating elements) is. Pay attention - the heater of flow models and the copper tank. Allowed exceptions confirming the rule. Instantaneous water heaters do not have a magnesium anode - the device does not need protection. And valves, coil-heated towel rails, other fittings should be selected taking into account the described features. Let's say more: if the SNiP says about rebar downstream, in our case we will have to trace the entire path. The reason - instantaneous water heaters crashes into the network without shut-off valves.
As a result, water at rest holds charges perfectly. In these water heaters there is an overheat protection, implemented by two mechanisms:
- Water flow sensor, showing the flow, at a flow rate below the specified one, the heating element does not turn on.
- Ordinary thermostat, less commonly a thermal fuse. Under normal conditions, the element should not work.
If a neighbor chooses to install a instantaneous water heater, and the valves are not made of galvanized steel, the fixture may not be sweet.
General Notes for Installing a Cumulative Type Water Heater
A lot has been said about the correct installation of the water heater. In the process, the tank accumulates a muddy sediment, and the masters put the device, following the scheme:
- A tee is placed directly under the inlet nozzle, an emergency drain valve is mounted in the side outlet.
- A check valve and a shut-off valve are installed for servicing.
Everything looks like a vertical line going down. When there is no water flow, there is no flow, sediment from the tank penetrates the check valve, made so that foreign objects disrupt the work. Found a way to avoid trouble, at the very least to ensure that the tank is cleaned from deposits without disassembling the water heater and pulling out the heating elements. This is what the craftsman suggested in the video: the installation of the storage water heater is carried out according to the standard scheme, but on the tee side outlet goes to the check valve. And the drain valve runs into the bottom one.
Let's see what happens. Previously, when the water was drained, dirt went off into the filter branch. At least by inertia. Now the flow goes to the sewer, and if you do everything right, then the tank will be cleared. For this:
- Shut off the water with a valve.
- Open the mixer on the hot water supply. Without this, the tank will not be emptied. Pay attention - 15% of capacity will pour out in a bath. This is because the drain tube is located in the upper quarter of the tank. Anything below will remain inside.
- Pull the hose into the toilet or any container to collect water and open the valve. The water goes down vertically, the filter branch will drain, so that the dirt comes out of it, you need to bend the pipe in order to go up. The master asserts that the sediment fills the tank by a third, the branch without filter rises to this level. Whether to fulfill the requirement, decide for yourself, but the idea is interesting. And the water, leaving, will take the sediment. It is worth cleaning the valve. To do this, drain the water from the tank, open the valve at the riser. Care should be taken without damaging the check valve. The head will clear the blockage, clean the branch.
Please note - the installation instructions for the heater will not require additional details. To install the water heater on plastic pipes yourself, transitional couplings are required. Assembling by hand, the joints are better sealed to tow, smeared with a special compound. Nowhere should there be at least three turns when installing a water heater. If the inlet and outlet connections do not allow the fittings to be screwed properly, it is necessary to take a die and cut the thread to the desired number of turns. Note - with the tow the item will sit down half a turn less than without it. The minimum requirement is three turns, cut more, with a margin. Installing an electric water heater is a simple matter, how to do it, it is said. Add: the valve is placed at the outlet, the part is needed just for convenience. It is so much easier to empty the water( in the left hand the output tap, in the right - the input tap).There is no reason to put it, but it is customary to do so. It happened from Ariston, where in the training videos the water heater was placed parallel to the contour of the hot water.
