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These products are used to heat private garages, service stations, utility and storage facilities, construction sites - where people do not live. In the event of a breakdown of diesel heat guns, it is quite possible to independently diagnose, establish the cause of the breakdown and repair the unit.
Such guns are often called fan heaters due to the similarity of the principle of operation, but they have certain differences. They work in the same way as other similar products: air flows around the combustion chamber housing with a fan and heats the room.
The principle of operation of the heat gun
The design of modern guns includes a special sensor that turns off the device when the set temperature is reached, thus achieving significant fuel savings. Garage craftsmen make guns that can run on different grades of used oil.
Factory or homemade, heaters have several very vulnerabilities so they need frequent repairs. This is cleaning nozzles and filters, replacing the fan and much more. To find out all the vulnerabilities, you need to study the design of such guns.
Important advice! After using the gun and setting it for long-term storage, the remaining fuel must be drained, and the tank must be thoroughly rinsed from the remaining diesel fuel. It is unsafe for the product to use fuels that have been stored for a long time.
Products with indirect heating method premises have chimneys through which all combustion products are removed, so in practice they can be used to heat living quarters. They are much safer, but they use oxygen for combustion, so ventilation or periodic ventilation is needed. Their power is lower, because losses occur through the exhaust system.
Diesel heat gun device
The product direct heating all combustion products remain in the room, so they cannot be used where people live permanently. They are used to heat construction sites and warehouses where there is a natural flow of air, because lack of ventilation can lead to carbon monoxide poisoning.
All products are equipped with powerful body made of metal: it excludes the ingress of foreign objects that can cause damage or become a source of fire. Necessarily installed fuse , which turns off the device when the case is very hot.
For circulation, use a compressor or a small pump, for pumping into the room - fan , which experts consider one of the vulnerabilities of these products. A burner and a fuel supply pipeline are located inside the housing.
The main elements of a diesel heat gun:
there is an exhaust pipe for removing smoke;
a fuel tank located at the bottom of the product;
pump or compressor driven by an electric motor.
Repairing a diesel installation can cost a user a lot, because only diagnostics cost from 1000 rubles, depending on the model. Many car enthusiasts cope on their own, diagnosing empirically or following the standard path from a simple failure to a complex case. Sometimes there are options when the product does not work normally just because it jumped off valve spring , it remains permanently closed - there is no air flow into the combustion chamber. As a result, the cannon also stalls.
This breakdown is determined simply - there is no movement of warm air. We begin a visual inspection of the motor: first, we will clean the terminals, then we will ring the motor winding using an analog tester. We also check the insulation of the winding. In some cases, in order not to waste time, it is easier to install new engine than testing the old one.
This is a very important detail: the functionality of the entire product depends on its high-quality work, because it sprays diesel fuel in the combustion chamber, thereby ensuring complete combustion of the fuel. Injectors rarely fail, and these spare parts for diesel devices can be purchased at any heat gun store.
Sometimes the diesel cannon stops working because there is no fuel supply to the injectors due to a clogged filter. We open the case of the device, unscrew the plug, take out the filter element and rinse it in a clean kerosene ... Then it can be blown off with compressed air and installed in place.
According to the statistics of all malfunctions, the fan often fails - it is he who undergoes intensive wear during the operation of the product. Reflow occurs insulation wiring or its burnout: in this case, it is not difficult to change the wires, but if mechanical stress or extreme wear is detected, then in this case the fan must be replaced.
Mostly heat guns are equipped with fans low power , therefore, it is not difficult to find a replacement for them - it is enough to visit a specialized store and choose a product based on the performance of your device.
The user must remember that all encountered failures require an individual approach, but there is nothing super complicated in the details of a diesel gun. Therefore, repairing a heat gun with your own hands is subject to any home craftsman - you just need to have the desire and a little free time.
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To ensure fire safety measures, a container with a fuel supply for the product must be located at a distance of 8 meters from heating devices or any sources of open flame.
Remember! Instead of diesel fuel, you cannot use gasoline of any brand: the likelihood of an explosion increases many times over, because it is more volatile.
Safety measures when using guns are quite simple - you must immediately leave the room if you feel:
sudden and severe dryness in the mouth;
pain in the throat, nose, or eye area;
sudden attacks of headache;
desires of nausea.
Many people react very painfully to carbon monoxide indoors: for example, people with lung diseases or cardiac patients with anemia, pregnant women. They are contraindicated to be located where a diesel heat gun with direct heating is used.
And this is not surprising: after all, with the help of these heating units, you can heat a room in a fairly short period, even large ones.
This is achieved due to the fact that the principle of operation of heat guns is as follows: heat is generated in the structural unit of the unit, and then, with the help of a powerful air flow, is supplied to a given place.
The uniqueness of the principle of operation of heat guns has led to the fact that recently equipment of this type has begun to be used quite often to achieve various industrial and domestic purposes. In other words, heat guns have gained extraordinary popularity due to their technical characteristics and ease of use.
But everyone probably knows that no matter how high-quality and efficient the equipment is, sooner or later failures occur in its functioning and malfunctions may occur.In such situations, the owners of heat guns, as a rule, contact specialized service centers.
However, there is another approach for identifying and eliminating defects in the operation of heating units of this type, which lies in the fact that the repair of a heat gun can be done by hand. Therefore, this article will be devoted to how to correctly find out and troubleshoot the operation of gas and diesel heat guns.
Most often, the following structural elements can fail in a gas heat gun:
blower fan;
piezoelectric element for gas ignition;
control and protective units;
fuel supply device.
Therefore, below we will indicate what malfunctions may arise in the operation of gas heating units, as well as how they can be eliminated with our own hands:
Gas does not ignite. In this situation, as a rule, the piezoelectric element has failed. It is recommended to clean the igniter and set the gap between the electrodes. And if the problem is not solved, then it is necessary to completely replace the piezoelectric element.Gas is connected to the heat gun, but does not enter the combustion chamber. The cause of this malfunction is a clogged burner. It is recommended to clean this element with a compressor, in other words, you need to blow through the burner with a powerful jet of air.There is an unpleasant smell of carbon monoxide. As a rule, the appearance of this malfunction is due to the fact that a leak has appeared in the gas hoses. Therefore, in order to eliminate this defect, it is necessary to tighten the fastening clamps or cut off the ends of the hose. If this procedure does not help, then these line hoses must be replaced.
You can read an overview of suitable heat guns for a garage in this article.
Diesel heat gun malfunctions consist of the following important points:
Fuel is supplied to the combustion chamber intermittently. The appearance of this defect is primarily associated with contamination of the fuel tank and its supply system. In this case, it is recommended to drain the fuel from the tank and rinse thoroughly. Then it is necessary to purge the entire fuel system.The fuel mixture is non-flammable. This failure is primarily associated with spark plug defects. To eliminate the malfunction, it is necessary to remove the plug, clean it mechanically, and also adjust the gap between the electrodes of this ignition element.The heat gun began to work intermittently. This type of malfunction is associated with a clogged air filter. In such a situation, a new filter must be installed.The heat exchanger does not heat up well due to a small flame in the combustion chamber. This defect is due to the fact that the nozzle is heavily soiled. In this case, cleaning occurs in a non-mechanical way. In other words, the nozzle is thoroughly flushed and then purged with a compressor.The heat gun overheats during operation. This malfunction occurred because the thermostat was out of order. To eliminate the defect, you need to clean all the elements of the thermostat or, if necessary, replace them with new ones.In conclusion, we would like to wish you that your heat gun never breaks down, and if, nevertheless, such a nuisance has happened, then following our recommendations, you can easily identify all the defects and feel free to carry out repairs yourself.
Watch a video in which an experienced user clearly demonstrates the process of repairing a gas heat gun with his own hands:
VIDEO by admin Published 08/22/2016 Updated 03/21/2017
Heat guns by their principle of operation are powerful fan heaters equipped with a set of protective and control units. The cost of these devices cannot be called low, therefore, maintenance and repair of heat guns will also cost a considerable amount.The best way out in the event of a malfunction in the heat gun is to repair it by the specialists of the service center, but to save money, you can try to make it yourself. To carry out repair work, there is a proven scheme - an algorithm of actions that any repair specialist should follow. Let's try to compile a list of actions that will bring your heat gun to life at minimal cost.
Actually, repair of fan heaters is not so difficult , and it should start with the observance of basic safety measures. Since almost any gun has a fan, regardless of the type of energy consumed by the device, it should be remembered that electric current is dangerous to human life. Any repairs to the heat gun, even without dismantling the protective casing, must be carried out with the voltage disconnected (the power cord is not connected to the mains). When checking the operability of the electrical power circuit, it is allowed to supply voltage to the device, but measurements should be made with insulated probes or a tool, while avoiding contact of live parts with open areas of the skin.
Repair of an electric heat gun, or the electrical part of any other gun, should begin with checking the integrity of the power circuit, which in its simplest version consists of a power cord, a power switch, electric heaters (TEN), a fan motor mode switch or heaters (if such a switch available) and engine. To check the continuity of the circuit, it is necessary to ring the following nodes with an ohmmeter (digital or pointer multimeter that measures resistance):
Except electrical fault a gas or diesel cannon can cause damage to the fuel systems , which you can also try to fix yourself. Repair of a gas or diesel heat gun can be done by eliminating the following faults:
After repair of the device must be correctly and efficiently assembled ... The duration of the subsequent uninterrupted operation of the heat gun depends on the build quality.
Repairing a diesel installation can be quite expensive, diagnostics alone can cost more than one thousand rubles. Many users cope with the breakdown on their own by disassembling the gun.
There are several reasons for the breakdown of diesel guns :
There is a problem with the valve spring - for example, it flew off and therefore the valve is constantly closed, without air flow into the chamber, because of this, the diesel gun stalls.
Broken fan wire when there is no warm air movement. First you need to strip the terminals, inspect the motor winding using a tester. Check winding insulation. However, in most cases, it is easier not to repair the diesel cannon yourself, but simply to buy a new engine.
It may be necessary to change the injectors. A lot depends on this part - it distributes fuel in the combustion chamber, that is, it ensures the correct operation of the entire gun. However, nozzles rarely break, but if this happens, then it is easy to buy and replace this part, they are sold in any heat gun store.
There is no fuel supply to the injectors due to clogged filter.To repair it, open the cannon body, open the plug, take out the filter and rinse it with kerosene. Dry and reinstall.
It is important to find the cause of the breakdown and correctly carry out the repair yourself. Buy the necessary parts and replace them; in most cases, repairing a diesel gun can be done by hand.
Most often, the fan breaks down in diesel heat guns, because it is he who wears out the fastest.
This happens for the following reasons :
Insulation melts or burns out quite often. In this situation, the wires should be changed. However, if the wire is completely worn out or it was damaged mechanically, then the fan will have to be replaced.
Most diesel heat guns are equipped with low-power fans, so it can be easily replaced if necessary, because this part is available in any gun equipment store.
You need to choose a fan based on the performance of the gun.
You can replace the fan either yourself or, if you are unsure of your own abilities, call the master.
Any breakdown of a diesel cannon can be repaired without calling a master, most often you just need to buy and install a new part. Of course, each heating installation requires a special approach, but if you find time for repairs, you can do everything yourself.
In a gas cannon, the most common parts that break down are: the blower fan; piezoelectric element for gas combustion; control and protective units; fuel supply device. There are several ways to repair a gas cannon yourself.
Problems are as follows :
Gas does not burn. Usually the problem is in the piezoelectric element. Cleaning the igniter and setting the gap between the electrodes can help. If this does not correct the situation, then you need to install a new piezoelectric element.
When gas is connected to the cannon, but does not directly enter the chamber. The main cause of this problem is burner clogging. It should be cleaned using a compressor, that is, a powerful jet of air.
Smell of carbon monoxide. This problem occurs when there is a leak in the gas hose. This can be eliminated by tightening the fastening clamps or cutting off the ends of the hose. If the smell persists after that, then it is best to buy and install new main hoses. To find the exact location of the gas leak, you should soap your hands and bring them to the hose - where the gas flows out, soap bubbles will inflate.
The gas cannon shuts down by itself. The most common cause of this problem is a breakdown of the electronic gas control valve. There is only one way out - a complete replacement of the part.
The cannon works as usual, but the gas is escaping much faster. In this case, the gearbox has broken down, the most correct solution to the problems would be a complete replacement of this element.
The burner is on, but no heat is felt. The problem is in the fan - first of all, the wiring is checked, if no faults are found, then you will need to buy a new fan and install it instead of the old one. It is not difficult to repair a gas cannon at home. However, most often, defective elements should simply be replaced with new ones.
Malfunctions of a diesel heat gun are also such - fuel unevenly enters the combustion chamber. Most often, the problem is associated with a clogged fuel tank. In this case, thorough flushing of the fuel tank and its supply system to the chamber can help. Before flushing, you need to drain all the fuel, and then purge the entire system and refill the fuel.
Fuel does not ignite. Spark plug defects can trigger this problem. To fix this, you need to pull out the candle and clean it mechanically, create a gap between the electrodes.
The diesel cannon works intermittently. The most common cause of malfunction is a clogged air filter. Only a new filter, which must be bought and stopped, will help in this situation.
The heat exchanger does not heat up well, the fire in the combustion chamber is small :
You should look at the nozzle, most likely it is clogged.
You can clean it yourself by flushing it from dirt, and then thoroughly blowing it with a powerful jet of air.
If it still doesn't light up, master will help.
The gun gets very hot during operation. The most common problem is the thermostat. The defect can be eliminated by cleaning the thermostat parts or completely replacing them with new ones. The heat gun can be easily repaired at home if the cause of the breakdown is correctly identified. For the procedure, you don't even need special tools or skills.
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This heating unit is currently available to everyone, but they often break. I don't want to pay several thousand for repairs by calling the master, so you can try to fix the problems yourself. Many guns require a simple temperature control, a thermocouple. With good fuel, the gun starts up and works normally, but do not forget about the timely cleaning of the unit parts.
There are hardly any more pressing problems in winter than problems with high-quality heating facilities. To solve them, special equipment is used, one of the most common among it is a heat gun, in particular, a gas one. Today we will talk about how to make a gas cannon with our own hands and whether it can be done in principle.
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Note that gas heat guns have become very popular in our country lately. And the reason for this is not only the specific climate, but also a fairly large number of summer cottages and country houses. In short, such devices have a lot of advantages.
Fairly fast assembly / disassembly.
They are safe.
Once installed, they are immediately ready for heating.
They are mobile and compact.
The air in the entire room warms up very quickly.
You will be able to independently adjust the temperature mode.
Finally, impressive efficiency.
If you connect the gun to a centralized gas supply, then it turns into a full-fledged stationary device, which in a private house can easily replace an entire heating system without any damage to the quality of heating. With regard to the fuel used, in most cases it is propane-butane.
Note! When the gas is burned, practically no odor is emitted.
Moreover, the multi-level protection system, which is available in the devices, completely excludes gas leakage. More "advanced" models have a special coating of the case, which protects it from damage.
Thanks to gas cannons, you can not only heat, but also quickly dry any surfaces - for example, plaster, freshly poured concrete, etc., and high performance makes it possible to use the device in large rooms - warehouses, hangars - and in crowded places. This device is really easy to turn on and forget, because temperature control, turning on / off is initiated by the thermostat. Finally, in terms of the amount of carbon monoxide, a gas cannon does not exceed a conventional stove.
Read about what else you can heat production facilities here
All devices of this kind consist of standard elements:
heat exchanger;
automatic device controller;
fan.
It is characteristic that the device requires very little electricity - after all, it is needed only in order for the fan to rotate. When the gas burns, the heat exchanger heats up. The air, driven by the fan, passes through the heat exchanger, heats up and spreads throughout the heated room.
The air can be heated in one of two ways:
Gas guns (do-it-yourself or factory-made) with direct heating have a fairly simple design, which is why their cost is low. In them, the burner is not insulated by anything, so that in addition to the heated air, the products of gas combustion also enter the room. For this reason, the device is compact and demonstrates good efficiency. But if it is used to heat a dwelling, then you must first make sure that there is a good ventilation system in it (the room) that would remove combustion products.
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The indirect cannons are equipped with insulated combustion chambers. They have special branch pipes with which these products are diverted and which are connected to a common chimney. They are ideal for any type of premises where a lot of people gather.
All this is a description of stationary guns, but besides them, there are portable or mobile guns. They are used in conjunction with gas cylinders. To make it convenient to transport and operate the device, it has special wheels and handles.
Note! Mobile guns require strict adherence to safety rules.
The operating time of such devices is dictated only by the volume of the gas cylinder, fuel consumption fluctuates in the range of 0.6-7 liters. at one o'clock. In order to extend the battery life, there are special adapters that allow you to connect the device to several cylinders at once. The most economical option is such a gun, which is equipped with a thermostat. With it, the device turns off after the required room temperature is reached. In a word, heating the room with such guns is a great opportunity to save on heating.
So, you have decided that your own gas cannon will be made by hand. Well, this is understandable, since it is economically beneficial. But desire alone is not enough, the following list of tools and materials will also be required.
Metal pipe for supplying fuel to the system.
Drill with drills for metal.
Bulgarian.
Steel sheet.
Metal strips 2 millimeters thick.
Eight mm iron pipe required to create a heat exchanger.
The fan from the car, its power must be at least 12 volts.
Armature for the structure on which the cannon will be placed.
Such devices are represented today by the widest assortment of models from different countries. We use them mainly for heating garages. But before you start to create a gas cannon with your own hands, we recall once again that it consumes a lot of electricity.
Perhaps you will also be interested in an article about how electric heating at home works
So, the step-by-step technology for manufacturing the device.
First stage. To begin with, we cut the pipe with a "grinder" - it will be through it that the gas will enter the system. These measures are necessary to further lengthen the pipe - in order to do this, we weld any other pipe with a similar diameter.
Second phase. Next, we need to slightly enlarge the hole (up to about 5 millimeters), through which the fuel will flow. In parallel with this, we lengthen the jet by 2 millimeters.
Stage three. When this is done, we increase the length of the body - this is necessary to increase the heat transfer. To do this, we need a metal disk (? 8 centimeters), which we will fix directly under the extension cord. Then a hole is drilled with? 1 centimeter, in total we need eight holes of a similar nature.
Stage four. We make a clamp that will fix the heat exchanger itself. After that, we weld two metal plates of 2 mm each in the form of a cross - this is also needed to increase heat transfer.
Fifth stage ... We build a heat exchanger. For this we take an iron pipe with? 8 centimeters, its walls should not be too thick.After that, we weld the end to the pipe wall, in which, in turn, we drill a hole. Through it we will pass the extension cord from the burner, and at the end the clamp must be additionally reinforced with bolts.
Sixth stage ... We continue to work with the heat exchanger. We make a hole in its body (using a grinder for this), to which a piece of an eight-centimeter tube is attached. Heated air will come out of it into the room.
Seventh stage ... Next, we take a regular fan from a car, which has a power of at least 12 volts, and install it on the second end of the exchanger body. This will be a kind of motor for us, in other words, a device that generates energy for our device, through which heat will be transferred to the heated room.
Eighth stage ... The last stage of work will be the drilling of the holes necessary in order to make it more convenient to ignite the gas. Moreover, you will also need to think over the design, where, in fact, the gas cannon will be placed with your own hands. You can use iron fittings for this by welding a kind of frame from it.
To use the gun, you need to perform some procedures.
We light the lighter, bringing it to the hole for fuel ignition.
We open the valve so that the gas begins to flow.
When the gas comes on, put the lighter back.
We turn on the fan.
If we briefly consider the manufacturing technology of this kind of heat gun, it looks like this:
we attach a metal extension disc to the burner;
lengthen the pipe required for gas supply to the device;
we install iron plates necessary to improve heat transfer;
we install the clamp on one side of the extension, after which it is necessary to fix the heat exchanger itself;
we collect the entire heating pad assembly;
we make holes in the heat exchanger so that hot air escapes through them;
weld a metal ring to the second end of the pipe;
we install a switch on the heat exchanger that will turn on / off the fan;
directly assembly of the fan.
Do not forget that a gas cannon with its own hands also needs a body. This body, as you know, most of all resembles an ordinary pipe, so we can easily make it ourselves. To do this, we take a not too thick sheet of steel, cut it off in order to give it the required dimensions, and roll it into a pipe.
In order to connect the edges of the sheet together, you can resort to the connecting lock method. If for one reason or another you cannot do this, then use the usual fixing bolts.
Video (click to play).
Well, so we examined the features, the principle of operation and the manufacturing technology of such a device as a gas heat gun. This device is very popular in view of its economy and the possibility of heating rooms with a large area in record time. You can do it yourself, just have a list of the necessary tools, materials, as well as a little patience.
