Autoterm Air 4D Diesel parking heater
Autoterm Air 4D diesel air heaters have become indispensable in campervans, motorhomes and expedition vehicles. They are designed for continuous operation and are extremely safe and reliable. With low fuel and power consumption, they heat small and large touring vehicles both on land and on the water in a way that is easy to set up. Thanks to the existing E-mark, the installation of the heater does not require any approval or registration. The Autoterm Air 4D (4 kw) and smaller 2D (2 kw) heaters, are available for vehicles with 12 volts as well as with 24 volts on-board voltage. A touring vehicle equipped with Autoterm Air is not only perfectly equipped for the cold European winters - higher altitudes are also no problem. With previous parking heaters, lower air pressure quickly led to soot ignition in the combustion chamber. Meanwhile, however, the Autoterm Air 4D has been equipped with an altitude kit for some time. It regulates the amount of diesel fuel injected, depending on the ambient air pressure, completely independently and always appropriately downwards.
Attention
Even with the altitude kit, operating a diesel parking heater (like a diesel engine in a car) is a technical compromise. After a certain period of time, you have to make sure that the combustion chamber gets very hot again and that you can burn the heater from soot deposits. Sooting cannot be completely avoided even with an altitude kit. If you actually spend a few weeks at 2,500 m altitude, cleaning the combustion chamber and replacing the seals is possible. Slow burning in the heating is the most important and also the only necessary maintenance of the heating. Planting generally occurs when the heating is running at low power or is frequently switched on and off. Therefore, the heating should be run at full power for half an hour every 1 or at the latest 2 weeks to clean the combustion chamber. You probably know what happens when you drive a diesel car at low revs! Exactly the same thing happens in your diesel parking heater. After a decent drive on the motorway, it's fine again - as long as you don't wait too long.
Air intake and hot air outlet
In such extreme conditions, the free flow of air through the fan is particularly important. If you want to travel such distances, it is best to install a very simple hot air distributor - short and without many bends. The combustion air inlet and outlet should be extremely short and low resistance. Avoid kinks, blockages and reductions.
Remote control
The heater has an input on the wiring harness for an emergency switch, which is often used for its own remote controls. Only two wires need to be connected using switches or relays. There are two possibilities for control. First: continuously. In this case, the heating starts and runs until the connection is broken again. Second: With a pulse. In this case, a pulse of 0.5-3 s can be used to switch on. The next pulse switches the heating off again. The advantage of the second variant is that the heating can be controlled using different operating elements. For example, it can be switched on using a self-built remote control or button and then the power level can be adjusted, or it can be switched off from the bed using a control element.
The kit includes everything you need to install the Autoterm 4D
-The 12V / 24V heating system (depending on configuration)
-Autoterm "Extra Quiet" fuel pump
-Exhaust silencer (17 x 9 x 5 cm)
-Rubber metering pump holder
-Dosing pump wiring harness
-Heater wiring harness
-Inlet air duct with integrated silencer
-Heat protection tube
-Exhaust pipe end + clamp -Tank inlet pipe
-5.5 m fuel line
-Fuel line connector
-Corrugated sheet metal exhaust pipe 1m
-Auxiliary tank 7l
-Bolts, nuts, clamps, heat shrink tubing, cable ties
-Instruction manual
Note
The fuel line included in the kit is usually sufficient. If the hose proves to be too short you can order it by the metre.
Installation
Installation can also be carried out by a layman. Therefore, you are not obliged to have your parking heater installed by a workshop. The installation must be carried out professionally and in accordance with the manufacturer's installation instructions.
