The ventilation and heating system of the UAZ-31512, UAZ-31514, UAZ-31519 and UAZ Hunter cars is very simple and primitive both in design and in principle of operation. The heater with its simplest air distribution system simultaneously, in one way or another, participates both in the operation of the heating system and in the operation of the UAZ interior ventilation system.

A standard heater for UAZ-31512, UAZ-31514, UAZ-31519 and UAZ Hunter cars is an extremely primitive installation consisting of a box with dampers containing a radiator, an electric motor with an impeller and additional resistance.

The uncomplicated system of distribution of incoming air includes an air intake with a mechanical control drive, two nozzles for blowing a windshield, two corrugated hoses and a damper for the heater box.

On UAZ Hunter cars, since 2010, a plastic box has been added to the heater design, part number 3151-8101231, which is installed between the air intake flap and the heater radiator and is designed to collect and drain rainwater entering the heater when the air intake flap cover is open.

Rainwater entering through the air intake hatch into this plastic box is drained out through a rubber hose that runs to the bulkhead of the engine compartment inside the passenger compartment.

And water or condensate from the inside of the heater is drained through a second rubber hose located in the lower part of its body and also led into the engine compartment through a hole in its bulkhead.

The installation of the plastic box 3151-8101231 greatly reduced the intensity of the incoming air flow into the cabin when the car was moving and worsened natural ventilation, but rainwater no longer falls on the hot heater radiator and does not form steam in the cabin, which settles on the windows from the inside. In addition, this box prevents most of the dust, sand and dirt from getting directly into the heater, and through it into the passenger compartment.

Interior ventilation of UAZ-31512, UAZ-31514, UAZ-31519 and UAZ Hunter vehicles.

The car is equipped with natural and forced ventilation. With natural ventilation, air enters the passenger compartment through open pivoting vents or door windows. While the vehicle is moving, the incident air flow is additionally supplied to the cab through the air intake installed in front of the windshield. The air intake is opened with a lever installed to the left of the heater.

With the windows closed and forced ventilation, air is blown into the UAZ passenger compartment by an electric fan of the heater without heating it. The air passes through the air intake, the disconnected heater radiator, the fan and enters the driver's and front passenger's foot area, as well as the central part of the passenger compartment to the rear seats. In addition, air flows through corrugated plastic hoses to the windscreen blower nozzles.

The intensity of the forced ventilation of the passenger compartment with the windows closed is regulated by turning on the heater electric motor to one of the modes, as well as by adjusting the amount of lift of the air intake flap cover.

Practice shows that the capabilities of a standard ventilation system with closed windows are very limited and it does not work efficiently, there is no normal air circulation in the cabin, which leads to permanent windows. Therefore, like everything in the UAZ, it is desirable to modify the ventilation system in some way, one of the options for such a modification is considered in.

Heating of the interior of UAZ-31512, UAZ-31514, UAZ-31519 and UAZ Hunter cars.

The UAZ salon is heated with heated air, which flows inside the same way as with forced ventilation, but with the heater radiator turned on. To adjust the flow of hot liquid from the engine cooling system to the heater radiator, a tap is used, which is installed on the cylinder head in cars with UMZ-417 and UMZ-421 engines, or located inside on the bulkhead on the front passenger side, in cars with a ZMZ engine. 409.

In UAZ Hunter cars with the ZMZ-409 engine, to simplify the procedure for controlling the heater tap, a remote control system can be installed for it. More on this in a separate.

With the control valve open, the fluid from the engine cylinder head enters the heater radiator and then is discharged to the water pump, forming a small circulation circle parallel to the main fluid flow in the system. Fresh air from outside, through the air intake hatch, passes into the heater box, then by gravity, or forcedly driven by a fan, through a hot radiator, enters the already heated interior.

The flow of thermal air passed through the radiator is distributed to the windshield blowing, heating the driver's and front passenger's feet and through the central part of the passenger compartment to the rear seats. The air flow can be completely directed to blowing the windshield, for which it is necessary to close the front cover of the heater box and the flaps on the branch pipes of the lower distribution ducts.

The amount and intensity of the heated air entering the passenger compartment is regulated by the amount of opening the air intake flap and the speed of the heater fan. The heater motor switch can be used to select one of two modes of its operation - minimum or maximum fan speed.

The UAZ interior heater works effectively only if the temperature of the liquid in the engine cooling system is at least 80 degrees. In the cold season, in order to increase the temperature of the coolant, it is advisable to install an insulating cover on the radiator lining on the UAZ Hunter car, and on UAZ-31512, UAZ-31514, UAZ-31519 cars, regulate the air flow using the radiator shutters.

Modification and improvement of the design of the UAZ Hunter heater, selection and replacement of the electric motor, seasonal maintenance of the heater.

Like any primitive design, in order to increase the efficiency of work, the standard heater Oise Hunter needs improvement and some simple revision. One of the possible options for such revision, as well as seasonal maintenance of the heater and the air distribution system, is discussed in more detail in a separate section.

UAZ 469, like UAZ Hunter, is equipped with a heating system that is not capable of heating the interior. Slots and insignificant thermal insulation make the UAZ Patriot cold.

Right choice

In winter, you want comfortable warmth in the cabin

It is allowed to install an additional heater in the rear of the passenger compartment of the considered models. The choice of stove depends on personal preferences, tastes and finances of the owner of the UAZ 469 or UAZ Hunter. In any case, the heater configuration is changed. It can be:

• KITB.3221-8110010;
• heater NAMI-4 or NAMI-7,
• stove from Zhiguli.

Auto mechanics recommend installing an autonomous heater NAMI-4 on this model, which will run on gas fuel. This takes into account that regardless of the choice made, the stove must have a power of 2-4 kW. The advantage of this system is the autonomous maintenance of the temperature in the cabin. The downside is the complicated installation.

Before you start tuning the UAZ Hunter, you need to take into account that the crane must also be replaced. This is due to its inconvenient location and tendency to leak. The correct solution in this case is to insert a new unit into this system. The crane is installed closer to the stove.

You need to embed the corner faucet in the cabin, otherwise it can get clogged with dirt. In this situation, one fitting is brought out into the box, and the second is connected to a similar radiator element. An important point in this matter is the correct choice of the part. It is recommended to install an adjustable valve.

You can give preference to the solenoid valve from the BMW 5 series. It must be mounted in the gap between the outlet and inlet pipes of the furnace radiator. This detail is not understandable. To upgrade it, you will need to drill 4 rivets in the cover. In this case, you will get a collapsible design that will be easy to clean. Screws are used to collect it.

Main works

Installing an additional heat source

Before installing a NAMI-4 heater or another model, the old stove is dismantled. If possible, the existing heating system is being modified by blowing side windows.

For this, a tee, flexible wiring, drills are used. Initially, you will need to make holes in the torpedo by installing side air ducts from KAMAZ or ZIL in them.

If a NAMI-4 heater is installed in UAZ Hunter or UAZ 469 as an additional furnace, then it is connected as follows:

1. Parallel: motor block - electric pump - tee - ball valves - stove radiators - tee - motor pump. It should be noted that each radiator has its own heat transfer and permeability. Upon completion of the dismantling work, the antifreeze passage is adjusted using taps through the heater. This step will allow them to blow in one direction.
2. In sequence: motor block - electric pump - stove radiator - heater radiator - engine pump.

When carrying out tuning, it must be remembered that the electric pump works more efficiently when the antifreeze exerts strong pressure on it. Therefore, the first element must be installed after the motor block. For better heating, hot antifreeze should go up the radiator, and the remaining liquid should come out from below. This is explained by a change in the density of the substance.

Another effective method of heating the UAZ 469 interior is tuning the cooling system. Its work is arranged in such a way that the cooling hot liquid practically does not get into the heater radiator. For this, an electric additional pump is installed. Initially, she is sorted out. Screws are used instead of self-tapping screws. Such tuning will allow you to get rid of the leak.

A new design is installed before or after the stove. The pump is fixed to the UAZ Hunter body with 2 self-tapping screws. From an electrical point of view, this device will operate from the moment the voltage is applied. At the same time, the valve will close the line. Auto mechanics recommend controlling a modern heating system using 2 switches:

• 1st is responsible for turning on the valve and supplying voltage;
• 2nd turns on the pump.

This scheme allows you to block the accidental activation of the pump and the closed valve. In the case of installing a turbine from a Maza heater, specialist assistance is required.

The UAZ Patriot car has a fairly large and voluminous interior. This is a big plus when you need to transport things or carry passengers. But a large salon, in addition to amenities and comfort, requires considerable heating costs. The UAZ Patriot SUV from the factory is equipped with a standard interior heater, which, according to the manufacturers' calculations, should heat the entire area of \u200b\u200bthe car. Indeed, the heater copes with its task of heating the passenger compartment, but only if the outside temperature is not lower than -5 degrees. Especially the drop in temperature overboard is clearly felt by the passengers in the rear seats.

Rear interior heater options

The UAZ Patriot car does not provide such a function as seat heating. The interior heater, during its operation, provides warm air mainly to the driver and front passenger. And if on the road and at sub-zero temperatures the only stove in the cabin refuses to work, then what to do? To solve such problems, the UAZ Patriot SUV has a special device, which is called an additional stove. This material will tell about it, and also consider the process of its installation and use.

Any stove can serve as the second heating, but it is desirable to use a more powerful one, so you can take the product, for example, from a Gazelle car. You can install additional heating on an UAZ Patriot SUV either independently, which will require some knowledge, or with the help of a repair shop.

This is what a factory heater looks like

The second heating makes it possible to provide not only a positive temperature in the UAZ Patriot SUV, but also will not allow the passengers in the back seat to freeze. Such an auxiliary heater is installed under the following factors:

• if the UAZ Patriot car is operated mainly in regions where winters are especially severe and the air temperature reaches -20 degrees and below;
• if you often have to use an SUV;
• in the case of transporting children, for example, every day to school, kindergarten, etc.

Also, the driver can install a second interior heater if he feels that the standard stove cannot cope with its functions even with slight drops in temperature. That, however, in this case, it is necessary to check the serviceability of the standard heater, but that's another story.

Operation and connection

If you decide to install additional heating in the UAZ salon, then you should know that the stoves should be connected in parallel. Parallel connection of the main and auxiliary heater has the following advantages:

Route hoses through the cabin

1. There is no additional load on the vehicle's power system.
2. It is possible to control the devices independently of each other when installing the switch on additional equipment.
3. Two functioning stoves will heat up the interior in a matter of minutes.
4. There is no need to worry about passengers traveling in the back seat. After all, now heat will flow to them from below.

The use of another heater has many positive aspects, and most importantly, it provides comfort in the cabin during the cold season.

With sequential installation of heaters, in the end we get one drawback - the inability to turn off one of the stoves. When it gets hot in the cabin, of course, you should turn off the heating, since overdrying the air is dangerous for the body.

It is recommended to place an additional stove in the following places: between the front seats; under the front seats. It all depends on the heater model that you choose for your UAZ Patriot car. There are many models of "seat" heaters in the car interior, but it is important to consider not only the performance of the device, but also the size.

Thus, an ordinary radiator can be installed on an UAZ Patriot SUV, which, perhaps, is lying around in the garage or a special heater with a built-in fan. Consider the features of installing the product.

Installation features

Installation of an additional heater on an SUV is carried out in stages:

Antifreeze will circulate in the auxiliary heater, which is pumped by a standard pump. If desired, to ensure greater productivity, you can install an additional pump. This completes the installation and you should consider some of the disadvantages of such equipment.

A little about the cons

Of course, the main purpose of the additional heater is to provide comfort in the cabin by maintaining the temperature at least 18 degrees in severe frosts. But, having installed new equipment, such negative points arise:

• in winter, the engine warms up more slowly;
• the appearance of extra decibels of noise (from the electric fan);
• the appearance of dust, which will circulate through the cabin due to the functioning of fan heaters;
• heating the floor upholstery, where the hoses run to the heater, which will cause inconvenience in the summer. You can fix this problem by installing a tap on the hose going to the Patriot heater.

I made an air intake for the stove from the passenger compartment (with the air intake closed by the staff). To do this, I cut a "pocket" into the air intake shaft under the dashboard. Now, when you close your own "hail", the air enters the stove from under the dashboard. But here's the problem - the side windows instantly freeze (even while standing, even in motion). If you open your own air intake, the glass is thawed. Maybe someone knows what the matter is, or knows another way of organizing the air supply from the cabin?

Well, this is not only a problem on the UAZ, but in general on any car. It's just that the air that you are trying to drive in a circle (from salon to salon) has a lot of humidity, and since you also breathe :-), the humidity is constantly growing. Well Duc and they will fog up :-( In theory, it is necessary to dry the air taken from the passenger compartment in some way (a filter or something like that). But how to do it easier - the devil only knows.

In fact, a good scheme in this respect was at 452 (now the plant for some reason has refused it). Air could be taken in both from the outside and from the inside, and it was also possible to let air past the stove. This allows the stove to be used as an additional radiator section for cooling in summer. Why did the plant abandon this scheme?

I have had a stove from M-2140 for two winters. It takes up less space, and it warms up - I go in a sweater at -15. It is put in place of the regular one. You need waterproof plywood, a drill, a jigsaw for cutting plywood.

Removable deflector
On an ordinary UAZ with lower wipers, icing of the left brush (especially its far end) is observed in inclement winter weather.
To combat this phenomenon, I made a simple removable deflector that redirects warm air flow from the right duct to the "dead zone" between the ducts (where most of the left brush is located).
Approximate dimensions:

"In winter there is no warmer, in summer there is no colder"
This saying is definitely not about the UAZ! In any case, not about the standard Loaf, in which a huge space behind the driver's back is heated by a frail stove, originally from the 60s, when felt boots and earflaps compensated for any lack of heat.
For anyone, the replacement of the heater with a more modern and efficient one begs.

The new heater, although made in China, is quite competent. Unlike the standard one, which makes more noise than produces heat, and the place it takes, which we have prepared for the 2nd battery :)

We dismantle the old stove. You will have to unscrew many screws on the partition.
Antifreeze was drained, we combined this operation with replacing the radiator pipes with silicone RedBTR.

Large size but low efficiency.
The factory tried to improve it by increasing the hoses and pipes to 22mm, but this was not enough.

The place for the heater was chosen behind the partition, behind the driver's seat.
Four metal corners were fixed to the floor with self-tapping screws, having previously marked them along the threaded holes on the heater.

The corners raise the heater slightly above the floor, especially for better air circulation.

Another angle of the stove location.

I must say that 6 holes on the body are equipped with rotary covers, with which it is possible to regulate and direct the air flow. The outer diameter of the flange is 40 mm, which allows you to put on a plumbing corrugation and bring warm air to the right places (corrugation from washbasins is sold by the meter).

View from the side of the salon door.

A standard chair is not a hindrance. It is fixed in regular places. The heater is connected to the cooling system in parallel to the front one, with tees. Established circuit in series! The crane is not yet equipped, but there are plans.
The hoses pass through the rear wall of the engine shield through the holes in which the rubber bushings are installed (they are standard, removed from the bulkhead behind the passenger).

During the operation of the front stove from NAMI and the rear one, it became clear that it was necessary to install an electric pump that increases the rate of heat exchange. The stoves are each 2 times more powerful. So far, only purchased, but not installed

Heater control is somewhat different from the conventional one. Switching of 3 speeds of the fan motor is carried out by stepping the handle towards itself. The resistance is mounted together with the switch, so you only need to run one 2.5mm2 wire from the switch to the heater. And of course, provide a minus for the heater and plus (after the ignition switch and protected by a fuse) for the switch itself.

The new heater does a very good job of warming up the middle of the car, even at the lowest engine speed. The 3rd fastest was practically not used, despite the fact that the ceiling of our loaf was not completed and from the inside on the metal there was only vibration insulation.