Table of Contents
The wood-fired furnace in the house, especially if it is the only source of heating in it, deserves place of honor and regular leaving. If the furnace has been put in due time by the experienced stove-setter, then it will serve as much how many there will be house. It is necessary to clean pipe and flue only from time to time, to open and clean so-called wells (the smoke courses in cavity of the furnace), to repair fire chamber, plate and the furnace to oil and paint. All these events held timely will save members of household from unforeseen situations in the form of lack of draft in flue, destructions of pipe and flue during the cold periods of time.
How to clean flue and pipe from soot?
A priori that in use furnaces, on walls of its flue and pipe soot accumulates. If the furnace burns firewood, then there is it more slowly and if to heat coal or coal briquettes, then the flue opening quickly enough grows with soot. It leads not only to the fact that the furnace simply ceases to burn: firewood in fire chamber does not light up and if light up, then smoke goes to the room, but is fraught with more dangerous effects. Soot in flue can light up and then from the created high pressure and high temperature in flue there can be explosion. The best, than all this can come to an end: explosion will go up and the external pipe will collapse. But there are also such cases that explosive power the furnace collapses and here effects can be very serious.
It is necessary to begin repair and preparation of the furnace for heating season with clearing of flue because it is the dirtiest works during which soot gets on plate and dust can soil just executed painting.
How to define whether cleaning of flue is required
Cleaning of flue can not be required during is long time of operation of the furnace if to heat only it dry birch, alder or aspen firewood. The firewood which has lain under canopy not less than 1.5 years is considered as dry. Fir-tree, pine or firewood from larch contaminates flue soot, not to mention coal much quicker. Besides, fast accumulation of soot happens if owners burn down synthetic garbage in the oven.
The very first sign of contamination of flue is the bad draft in fire chamber i.e. if badly light up, even dry firewood slowly burns through. In that case the owner should leave the house and to look what color smoke comes out pipe. If when using good dry firewood, smoke from the furnace has dark color, then it is signal that the flue clearing is required. Color of flame from the firewood burning in the oven at clean flue light orange, firewood when burning publishes characteristic easy crackling and small noise. If color of flame is much more dark than orange color, and firewood hardly burns, then it also indicates that the flue is littered with soot.
More precisely to define that immediate cleaning is required, half or the whole brick tied with rope will help. It is enough to lower of it in pipe: if the brick passes freely on depth of 1.5 – 2 meters, so it is not soot and it is necessary to look for other reason of bad draft. If the brick does not pass or passes hardly, it is necessary to clean flue immediately.
In order that it did not become surprise it is necessary to carry out by brick to winter icy cold, diagnostics in the summer.
Cleaning of flue
Before beginning works, it is necessary to open valves of fireplace and the furnace as it is possible to close more carefully opening under them over plate. It is good to shut fire chamber and ashpit.
Clean pipes big ruff (metal or from rigid plastic) to whom I attach load. All this design is bound rope and movements try to obtain up-down that soot has fallen down, to plate. Then several times open valves that residues of soot from blows have fallen down, then remove soot from plate, clean the furnace, fire chamber and ashpit.
Prevention of excessive formation of soot
The simplest method of prevention of sedimentation of soot in flue is burning of potato cleanings in fire chamber together with firewood. It is the best of all to dry cleanings previously or to get wet at least with the newspaper.
Cleaning of wells (flues in furnace cavity)
Usually owners know where there are wells on the tags, but if you have for the first time faced need of cleaning of wells, and it is necessary to clean them at least 1 time in 3 years, then you should look for them. As a rule, them have on 3 parties of the furnace, except that where the plate is mounted. Attentively look narrowly at the surface of the furnace where there is entrance to well, the brick (usually half) lies edge and under it emptiness. Take trowel or the palette and determine by percussion emptiness by the furnace.
Then remove plaster and take out the half of brick which is door in well. In wells light gray ashes which need to be removed by means of scoop or deep blade are besieged. Wells can leave on quite deep water and in different directions therefore in them rather large amount of ashes accumulates. Ashes from wells do not need to be thrown out, it is excellent fertilizing for kitchen garden.
After wells are cleaned, they need to be closed brick again and to cover with quick-hardening mix. Ideally it has to be the clay divorced with water and lime, but also any quick-hardening plaster is good.
Smoke freely passes through clean wells in pipe, and firewood burns through for the put period, effectively warming up bricks. Thus, the owner can close pipe in time, at the same time heatlosses are excluded.
Repair of fire chamber, plate
In fire chamber the metal grid can be damaged, it needs to be replaced, otherwise not burned through logs will fail in ashpit. The fire chamber door not seldom from high temperatures loses tightness and badly pretends to be. It is possible to try to adjust it if it does not work well, then the door should be changed.
Sometimes the plate surface bursts, it needs also to be changed for new. Before buying plate or grid, it is necessary to measure them to know the necessary size. Having mounted new cooking surface, it is necessary to cover all openings with the mix steady against high temperatures. In those cases if bricks somewhere are damaged, they need also to be replaced.
Plaster and painting of the furnace
Before plastering the furnace, it is necessary to clean its surface from old painting and plaster which badly keeps. For this purpose it is necessary to work safely with trowel or the palette, showering with everything that not reliably keeps on oven walls. The formed dust needs to be swept away broom or the big brush, the wetted in water.
Then it is necessary to plaster the formed hollows. It can be done by means of the palette and trowel or trowel. If there is opportunity, then it is the best of all to apply natural clay. Dry mixes, of course, to part and put much more simply, but clay is most eco-friendly. Plaster is applied on the surface which is previously moistened with water as water provides the best sticking.
After plaster places dry out, they need to whiten or painted over that paint which you are going to apply to all surface. After twhiten places dry out, it is possible to start painting of all furnace.
As a rule, repair of the furnace is combined with whitewashing of all house therefore works need to be carried out in a complex, but, first of all, to clean flue and wells.
In the latest turn paint the dirtiest places of the furnace: near fire chamber, ashpit and over cooking surface.
All works on repair of the furnace are performed in warm season, the furnace has to be cold. If to apply whitewashing on the hot surface of the furnace, then it will quickly crack, and will be showered.
Too big coat of paint or limes also provokes fall of top layer therefore it is recommended to remove top layers of paint (whitewashing) at least partially.
In the house it is preferable to use unslaked lime to whitewashing, it is peculiar disinfecting of surfaces and prevention of formation of fungus and mold.
Why to heat the furnace in the summer?
To contain the house in proper condition, it is necessary to heat the furnace regularly. Besides, it maintains its working capacity. Even it is recommended to heat periodically the furnace in the summer, it needs to be done 2-3 times a month. It is enough to burn absolutely insignificant amount of thin firewood, chips in fire chamber, it is possible to leave valves not shut that there was additional ventilation of the room.