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Pic. 35: 1. Heated windshield air duct. 2. Air intake cover. 3. Heater radiator. 4. Bracket for fastening the shell of the air intake cover. 5. Flexible draft heater tap. 6. Radiator gasket. 7. Radiator shroud. 8. Bracket for fastening heater pipes. 9. Outlet pipe. 10. Supply pipe. 11. Bracket for fastening the shell of the crane thrust. 12. Side window heating nozzles. 13. Right side window heating air duct. 14. Heater valve. 15. Guide fan casing. 16. Traction collar. 17. The body of the damper for heating the side glass. 18. Air duct damper for heated windshield. 19. Thrust damper. 20. Electric fan mounting bracket. 21. Resistor. 22. Air distribution cover. 23. Air duct damper for heated windshield. 24. Electric motor. 25. Air duct for internal ventilation. 26. Impeller. 27. Fan cover. 28. Air distribution cover lever. 29. Handle for controlling the dampers of the air ducts for heating the windshield and side windows. 30. Air intake cover control handle. 31. Heater tap control handle. 32. Arm of control levers. 33. Flexible rod air intake cover. 34. Flexible draft damper windshield heating. 35. Guide nozzles. 36. Nozzle blades. 37. Nozzle control lever. 38. Nozzle body. 39. Decorative grille. 40. Valve. 41. Hood grille. 42. Heater installation location. 43. Hood. 44. Air intake box. 45. Windshield. 46. Dashboard. 47. Body front guard. 48. heater seal. I - Heater. II - Side window heating nozzle. III - Scheme of operation of exhaust ventilation. IV - Scheme of the heater.
The cabin is heated by air heated in the heater radiator, which is included in the engine cooling system in parallel with the main radiator. From the ingress of smoky air from the engine compartment, the air intake box is sealed with a rubber seal pressed against the inner panel of the hood.
Air enters through the grille 41 of the hood 43 of the car into the box 44 of the air intake located under the hood at the rear of the front end of the body. The reflector then abruptly changes the direction of air movement, separates it from rainwater, and then the air enters the heater radiator 3 through the casing hatch 7.
The plastic casing 7 of the radiator is fixed with four nuts from below to the reinforcement of the bulkhead shield through the sealing gasket 48. In the upper part of the casing there is an air intake cover 2 that regulates the amount of air entering the radiator 3. The right radiator tank is divided into two parts by a rubber gasket. A discharge pipe 9 and a valve 14 with an inlet pipe 10 are bolted to the tank. The ends of these pipes are connected by rubber hoses to the engine cooling system. The outlet of the pipes to the engine compartment is sealed with a rubber seal, which is attached to the bulkhead with two bolts.
The air that has passed through the heater radiator enters the guide casing 15 and the fan casing 27. The guide casing 15 is installed between the radiator and fan casings. Fastening is carried out by spring brackets to the radiator casing. In the center of the plastic guide casing, with the help of spring clips 20 on two elastic cushions, an electric motor 24 with a fan impeller 26 is installed. An additional resistance 21 is attached to the inner wall of the casing 27 of the fan (resistor). Connecting or disconnecting it to the electric motor circuit is made by a three-position switch on the instrument panel. An additional resistor provides low and high fan speeds.
From the casing 27 of the fan, the air rises through the window of the guide casing into the air duct 1 in the upper part of the instrument panel for heating the windshield, through the air ducts 13 through nozzles 12 located on the left and right sides of the instrument panel, for heating the windows of the front doors, through the air duct 25 for internal ventilation in the lower part of the cabin at the feet of the passengers.
From the bottom of the casing 27 of the fan, an air distribution cover 22 is hinged on the brackets, when opened, the lever 28 directs the air to the feet of the passengers through the internal ventilation air duct.
The heater is controlled by the handles 29, 30 and 31 on the instrument panel, the levers 37 for controlling the side nozzles 12, the lever 28 of the air distribution cover 22 and the fan motor switch.
The handles 29, 30 and 31 are put on the ends of the levers and fixed with protrusions stamped on the ends of the levers. The levers of the control handles are located on the axis installed in the bracket 32, which is fixed with two bolts to the cross member of the instrument panel. On both sides of each lever, friction rubber washers are installed on the axle, between which fixed steel washers are placed on the flat of the axle. All parts on the axis are pressed with a rubber cushion.
The upper handle 31 of the heater tap control is connected by a flexible rod 5 to the tap lever and regulates the amount of coolant coming from the cooling system to the heater radiator.
The handle 30 is connected by a flexible rod 33 with the air inlet cover 2 lever and regulates the amount of fresh air entering the heater.
The handle 29 for controlling the dampers of the air ducts 1 and 13 for heating the windshield and side windows is connected by a flexible rod 34 to the outer damper lever 23. The damper controls the amount of air entering the windshield and front door windows. The inner damper lever 23 is made integral with the damper and is connected by a rod 19 through a clamp 16 to the damper lever 18 of the right air duct 13 for heating the side glass. The tightness of the damper to the body 17 is provided by a polyurethane foam gasket. The flap of the left air duct has a similar design. By rearranging the clamp along the rod 19, it is possible to achieve complete closing of the damper. When the damper 23 of the air duct 1 is fully open, the dampers 18 for heating the side windows must be closed. The flexible rod 34 is connected to the damper lever 23 by means of a loop at the end. The other end of the rod is connected to the handle lever 29 through a hole in the lever. The ends of the flexible rod sheath are clamped with brackets using screws. Flexible rods 5 and 34 are connected in a similar way. When fixing the brackets on the tap, the radiator casing and on the guide casing, the ends of the shells of the rods should protrude from under the brackets by 5-7 mm. The fastening of the brackets on the bracket 32 of the heater control levers is carried out with the tap, air inlet cover closed and with the windshield air duct damper fully open so that the control levers do not reach the end of the grooves in the bracket by 5 mm.
To make it easier to remember the position of the control handles, there are symbols in the form of triangles on the instrument panel on the left. The vertices of the triangles indicate the position of the handles at which the valve, the air intake cover and the damper for the heated windshield air duct are closed.
Air is supplied to the side windows from air ducts 13 through the left and right nozzles 12, all parts of which are made of plastic. Housing 38 is inserted into the air duct into a rubber seal and is fixed to the air duct shoulder with four spring protrusions. Nozzles with guides are pivotally mounted in the openings of the body, along which the lever 37 moves, movably connected with three guide vanes 36. The direction of the air flow is changed by the lever 37, in the vertical direction by turning the nozzle in the holes, in the horizontal direction by turning the blades.
Connections of air ducts 1 and 13 with the fan casing are sealed with polyurethane foam gaskets.
Ventilation of the interior of the body can be carried out as follows:
- through the door windows with the windows down;
- through the upper nozzles on the insert of the instrument panel with the right position of the handles 29 and 30;
- through nozzles 12 on the instrument panel with the right position of the handle 30 and the left position of the handle 29;
- with covers 2 and 22 open to the lower part of the cabin.
The car has an exhaust ventilation system that sucks air out of the passenger compartment. The air from the passenger compartment passes under the upholstery of the inner side roof panel, depresses the rubber valve 40 and exits through the decorative grilles 39 on the side panels of the roof. Valves 40 prevent air from entering the passenger compartment in crosswinds.
At a low vehicle speed, the amount of fresh air can be increased by turning on one of the fan speeds.
Depending on the ambient temperature, various options for ventilation and heating of the passenger compartment are possible.
In hot and warm weather, the door windows are lowered for ventilation. For additional air flow, open the cover 2 air inlet (with handle pulled to the right 30), and lower the air distribution cover 22 with the lever 28. The air direction can be adjusted by the nozzles 12 of the air ducts 13. The amount of supply air can be increased by turning on the electric fan.
In cool weather, for ventilation and to prevent fogging of the windshield and side windows, the air flow is directed onto the glass with the handle 29 and the levers 37 of the air nozzles 13. To obtain slightly heated air, it is necessary to open the heater tap 14 by moving the handle 31 slightly to the right.
In cold weather, for heating and preventing the windows from freezing, open the heater cock and the air intake cover. To direct warm air to the lower part of the passenger compartment, the air distribution cover is opened.
In very cold weather, the interior temperature can be raised by turning on the electric fan and setting the air intake lid to the partially open position.
If it is necessary to quickly warm up the windshield, close the air distribution cover, and the handle 29 is moved to the right. Warm air will only be directed to the windshield.
At an ambient temperature of minus 25°C, a fully switched on heater provides an average temperature in the cabin of plus 25°C, and in the area of the driver's and passengers' feet plus 30°C.
It is forbidden to turn on the electric fan with the air intake cover closed and the heater valve open.