Operating principle
Such guns are often called fan heaters due to the similarity of their operating principle, but they have certain differences. They operate in the same way as other similar products: air flows around the combustion chamber body with the help of a fan and heats the room.
Operating principle of a heat gun
The design of modern guns includes a special sensor that turns off the device when a preset temperature is reached, thus achieving significant fuel savings. Garage workers make guns that can operate on different types of waste oil.
Factory or homemade, heaters have several very vulnerable spots, so they require frequent repairs. This includes 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 placing it in long-term storage, the remaining fuel must be drained and the tank thoroughly rinsed to remove any remaining diesel fuel. Using fuel that has been stored for a long time is unsafe for the product.
Volcano models
The characteristics of fan heaters of this brand are designed for both industrial and domestic use. The power of the units is 3-17 kW, which opens up possibilities for connecting equipment at home and for its use at production facilities. Features of the Volcano water fan heater include modern control provided by HMI controllers. The multifunctional interface, according to the owners, stably supports the operating parameters of up to 8 installations simultaneously.
There are also positive reviews about the design of fan heaters of this brand. In particular, many praise the optimized design of air-heating heat exchangers with several fin-lamella circuits. The aluminum structure has an anti-corrosion coating, and the internal structure is protected from mechanical damage. As the manufacturer himself notes, fan heaters are tested for leaks in special helium chambers, which confirms 100% isolation of the contents of the heat exchange pipes.
Product design
Products with an indirect method of heating rooms have chimneys through which all combustion products are removed, so in practice they can be used to heat residential premises. They are much safer, but they use oxygen for combustion, so ventilation or periodic airing is required. Their power is lower because losses occur through the exhaust system.
Design of diesel heat guns
For direct heating products, all combustion products remain in the room, so they cannot be used where people permanently live. They are used to heat construction sites and warehouses where there is natural air flow, because lack of ventilation can lead to carbon monoxide poisoning.
All products are equipped with a powerful metal casing: it prevents the entry of foreign objects that could cause damage or become a source of fire. Be sure to install a fuse that turns off the device when the case gets too hot.
A small compressor or pump is used for circulation, and a fan is used to pump it into the room, which experts consider one of the weak points of these products. Inside the housing there is a burner and a pipeline supplying fuel.
Main elements of a diesel heat gun:
- there is an exhaust pipe to remove smoke;
- fuel tank located at the bottom of the product;
- pump or compressor driven by an electric motor.
Electric motor repair
If we are dealing with a failure of the fan motor, then the situation becomes somewhat more complicated. It is quite simple to determine this breakdown - there is no directed flow of warm air. At the same time, it is necessary to understand that there is a risk of heating elements breaking down, since they are not cooled and can easily overheat.
Repair work should begin with checking the voltage at the terminals. If necessary, the contacts must be cleaned. Next you should move on to checking the continuity of the motor winding. However, a screwdriver with a tester will not help much here, so it is better to use more accurate devices, such as a multimeter or an analog tester. In this case, the winding insulation is additionally checked. If the core fails, then in this case it is easier to replace the entire electric motor. In any case, it will be faster and easier.
Possible problems
As a result of continuous and prolonged use, the equipment may experience a number of problems. Most often this is not due to the wear of some individual parts, but to mediocre maintenance. Let's look at common malfunctions of diesel heat guns.
Fuel supply is intermittent
The problem may arise due to accumulated dirt in the system hoses: fuel waste, oil, foreign objects, etc. This also includes a dirty tank. The malfunction can be resolved quite simply: drain the fuel, disconnect the hoses and thoroughly wash all the elements responsible for the fuel supply.
Fuel does not ignite
First of all, it is worth checking the spark plugs: replace faulty ones, and dry those filled with fuel. It would also be useful to adjust the gap between the electrodes if it has increased or, conversely, decreased.
The gun stalls periodically
Most likely the air filter is clogged. Considering the type of fuel, cleaning it is useless. It is much more efficient to buy a new one.
Diesel Gun Air Filter
Sometimes it’s all about the quality of the fuel: diesel fuel is different. Therefore, it makes sense to try to fill with fuel purchased at a gas station of another brand.
Heat exchanger temperature too low
If the flame in the combustion chamber does not burn intensely enough, the gun begins to idle. We have to set the maximum level of fuel supply, whereas previously the heat was sufficient at medium or even minimum values.
Most likely the injector is clogged. The element is quite easy to clean mechanically. The ideal option is purging with a compressor.
The gun is overheating
In a good half of cases, the thermostat is to blame. We remove the part, treat it from dirt and clean the contacts. In more advanced models, it cannot be repaired due to additional canopies - only replacement.
Causes of malfunctions
There is no need to talk about anything specific here. As practice shows, absolutely any structural element can break, but you can’t tell it right away by eye. This happens for a variety of reasons. Sometimes the user simply does not comply with the rules for operating heating equipment; in other cases, critical components fail due to poor quality of electricity. In the end, any part and assembly has its own service life, after which failure can occur at any time. For example, repairs to a heat gun produced relatively recently are carried out by service departments. This is especially true if the device is under warranty. If not, then you can try to restore the gun yourself. But not everyone buys a new heat gun, but uses an old one, which is not clear how it works.
Heat gun maintenance
Indirect heating diesel gun
All preventive maintenance work on equipment is limited to setting up and treating the air intake system, compressor and fuel pump. The procedure for each individual heat gun is approximately the same. Let's look at the details of maintenance using the example of a classic model with indirect heating and automatic flame control.
The design of a diesel heat gun cannot be called complex. The fuel is supplied to the injector by the pump, after which it is produced in the combustion chamber. The burner is ignited using a pair of electrodes. During operation, the fan drives the flow through the chamber. Indirect heating involves the presence of an independent circuit, as a result of which the combustion products have virtually no contact with the heated air.
Equipment prevention:
- Remove the casing and clean the fan from dirt.
- Disconnect the high-voltage wires from the combustion chamber and remove the fuel hose. Let's blow through the last one.
- Loosen the fasteners on the camera and remove the block. We remove soot.
- We unscrew the nuts at the end of the chamber and gain access to the nozzle. Let's blow it out.
- Let's put everything back together in reverse order.
conclusions
If you have thought and calculated everything well, and have decided on a list of basic requirements and characteristics that the device should have, then all you have to do is decide and purchase the model that best suits your needs. The above recommendations will allow you to choose an electric heat gun that can work for quite a long time, satisfying all your needs. This device is good because, with its compactness, convenience and functionality, it is able to quickly and efficiently warm up a room. The external data of heat guns is not the last thing when choosing, so it is worth focusing on them.
Safety precautions when using guns
To ensure fire safety measures, the container containing the fuel reserve for the product must be located at a distance of 8 meters from heating devices or any open flame sources.
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 should immediately leave the premises if you feel:
- sudden and severe dry mouth;
- pain in the throat, nose or eye area;
- sudden attacks of headache;
- urges of nausea.
Many people react very painfully to carbon monoxide indoors: for example, people with lung diseases or cardiac patients, anemia, and pregnant women. They are contraindicated to be in places where a diesel heat gun with direct heating is used.
conclusions
If you have thought and calculated everything well, and have decided on a list of basic requirements and characteristics that the device should have, then all you have to do is decide and purchase the model that best suits your needs. The above recommendations will allow you to choose an electric heat gun that can work for quite a long time, satisfying all your needs. This device is good because, with its compactness, convenience and functionality, it is able to quickly and efficiently warm up a room. The external data of heat guns is not the last thing when choosing, so it is worth focusing on them.
