A new boaters experience for your infomation. Before any one starts, yes we do have a Morso Squirrel and yes we use it; the fault was more of a frustration than an end of the world situation. Symptoms: Turn on, fan starts, runs 5 seconds fan turns off and heater shuts down. All were fine and so I was a bit stumped. Low and behold one 16 amp fuse, although on visual inspection appeared to be intact was not allowing any voltage to flow.

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Eberspacher heaters use a pulsed fuel metering pump to supply tiny spurts of fuel, about 0. The pump is pulsed by the Electronic Control unit ECU , each time the pump pulses the solenoid makes a loud "tick".

The pulse rate and pump setting determine how much fuel is supplied, there is no carburettor. Fuel is drawn by suction from the fuel supply up to the pump. Fuel flows into the combustion chamber where it is vaporized and mixed with air from the combustion air intake pipe and burnt.

The hot exhaust gasses pass through the inside of the heat exchanger and vent through the exhaust pipe. It is important that pumps and fuel pipes are correctly installed as many faults can be caused by incorrect installation.

Pump delivery volumes are preset during manufacture for the heater model so pumps should be the correct type but it may be possible to adjust others, see following page. There are too many details to cover here, full details are in the manuals. Pipe details quoted on this page generally apply to D2 D4 and some similar heaters, check manuals for confirmation on other models. Fuel Problem page shows details of our practical fault finding when we had fuel problems on our heater.

Eberspacher recommend regardless of the season, run the heater every month for a minimum period of 15 minutes which will ensure that the fuel in the pump and lines to the heater does not gel and solidify. We usually only run ours once or twice during the Summer but we run on kerosene. Although these pages are for Eberspacher diesel heaters Webasto use a similar fuel supply system so much of the general advice will also apply to Webasto heaters.

We welcome feedback and any additional advise you can add to these pages. Normal air bubbles in fuel pipe are very small and about half an inch apart. It may take several starts to drop to this size. Some are too small to be visible in this photo. More bubbles indicate a small air leak.

Very large bubbles indicate an air leak or lack of fuel. Performing a Fuel quantity test The fuel quantity test is an important check of the quantity of fuel delivered to the Eberspacher. Disconnect the fuel pipe from the Eberspacher fuel inlet and insert it in a small container to catch the pumped fuel. Fuel will exit the pipe during the test in reasonably powerful squirts, if it trickles out it shows there is a problem. Switch the heater on and once pump starts let it run to bleed any air for about a minute, then switch off and empty container.

Switch the heater on, the pump will start after about 60 seconds with a D2 or D4. Hold the end of the pipe in the container level with the glow pin while fuel is being delivered, between 90 and seconds. We know of instances where it tested ok when held at a lower level despite there being a fuel supply problem.

Once the pump stops switch off the heater and measure the quantity of fuel. Note cc, ml and cm3 are the same volume. The fuel quantity for these models should not be affected by normal voltage variations.

If the fuel volume is low or out of specification check for blocked filter or pipes, air leaks, incorrectly installed pump etc. High fuel volume is probably caused by incorrect fuel tap off point, see manuals, or incorrect pump.

Low fuel volume can cause flame outs, see Faults page High fuel volume can cause overheating shutdowns and wasted fuel. If you are testing on your own and the heater start switch is remote from the heater you can alter the test method slightly for an Airtronic D2 and get an approximate indication.

Do not switch off after 60 seconds, let it continue until it stops after the first start attempt, empty the fuel into a spare container and use the second start for the fuel measurement. If the results show fuel volume is marginal redo the test properly the original way. We do not know about other models. These time measurements were taken on our heaters to show how long you have between stages. Air bubbles should be removed before measurement. Hold syringe upright and then press plunger in very carefully.

Too much pressure and fuel squirts out, needing another test. Pump not clicking People assume that because the pump is not clicking it is faulty and remove it, then most find it is not faulty.

When the heater is started the ECU makes a number of checks as described on the Faults page. If any of these pre- start checks fail the ECU aborts the startup and no fuel is pumped.

Look at the Faults page first to eliminate those causes. Note also that pumping is delayed on modern heaters for up to a minute after switching on while the glowpin preheats. If the heater passes the pre- start checks and the blower speeds indicate everything is proceeding as it would normally but the pump is not clicking go to the Pump Mechanical section below.

Pump clicking but no fuel delivered to heater Check if you have run out of or are simply low on fuel, a tank pick up tube can be 50 mm or more above the tank bottom. This ensures there will be enough fuel left to run the engine and prevents crud in the bottom of the tank from being picked up.

On one camper van the tank held diesel for about miles but the heater stopped working after miles. If the fuel pipes were empty before starting check if purging of air is complete. Check the fuel lines and connections for air leaks Check all clips are tight. Check condition of rubber sleeves, they swell and can become porous as they deteriorate. Check for blockages in pipes, more details lower on this page. In very cold weather any water in the fuel can freeze.

Most UK fuel sold at the pumps is winterised from September onwards, summer fuel will wax up at relatively mild temperatures. Check the fuel pick- up pipe, on some non Eberspacher types the tube pushes into the upper part and can have an air leak or it might have fallen off.

Check the fuel filter in the base of the pump. Remove the pump and bench test it as described on Fuels 2 page. Fuel quantity test The fuel quantity test is an important check of the quantity of fuel delivered to the Eberspacher heater. The fan speed determines the amount of air entering the burner, the pump rate and setting the amount of fuel. Do this test if you suspect a fuel problem. It checks for blocked fuel filter, blocked or kinked pipes, loose connections, air leaks, faulty pump, or incorrectly installed piping.

If the pump does not deliver sufficient fuel it can cause non or difficult starting, flame- outs and white smoke. Too much fuel can cause similar starting problems, overheating, black smoke and the heater to clog up.

Details of the test are on this page. Pump adjustment details are on the next page. Water in diesel fuel Diesel fuel will always contain some water when sold. As the fuel level or temperature changes air enters the tank through the vent, condensation then forms when the air cools increasing the water in the tank.

The water— fuel interface at the tank bottom is an environment that encourages biological growth which can clog filters and prevent fuel flow to the heater. Diesel floats on top of water so pickup pipes should not reach the bottom of the tank. Even then as the water sloshes about it can sometimes reach the end of the pipe and be picked up and cause intermittent and puzzling flame outs.

If water is found in the fuel siphon it off from the lowest point of the tank until clear fuel is siphoned up. Fuel Degradation Diesel fuel starts to deteriorate the moment it leaves the refinery. As it ages during storage, it creates particles and a black sludge that accumulate in the tank. The diesel visibly darkens. Debris can be disturbed when new fuel is added or when fuel sloshes around in the tank. The cetane value of the fuel also drops as it ages and can drop so low it will no longer ignite in the heater.

More information is in the Eberspacher technical bulletin Priming the fuel supply If the fuel pipes are empty the pump has to purge the air from them before fuel can reach the heater. With a thin pipe this often takes two start attempts, with a larger or far longer pipe it can take 5 or more restarts and up to 30 minutes to start. Manual priming by dabbing temporary wires on a battery can be done but it is not very practical.

As a comparison we estimate one start attempt on a D1LCC can give over pulses. Cold weather Fuel thickens as the temperature drops, if it combines with debris in the fuel filter it can restrict the fuel flow. Any water trapped in the pump or filter can freeze and block the fuel feed and seize up the pump. Water can be trapped in the exhaust pipe and freeze which blocks the exhaust gas flow. This can be a problem on boats where the outlet pipe is higher than the heater so condensation cannot drain.

Some fuels do not perform well at low temperatures. Dereks calculations on 1. These bubbles are created by the pump action and are present even if there are no air leaks. Despite a lot of considering we are still not sure why they are produced. If anyone can explain what produces them please let us know.

If there are a lot more bubbles than those shown in the picture it can indicate an air leak. However we have noticed it does take a long time for bubbles to drop to this amount and size after the pump has been primed, it can take quite a few successful starts, the bubbles gradually diminish.

Larger bubbles can be due to a serious air leak but are more often caused by lack of fuel. If the pipe is disconnected fuel spurts out quite strongly, if it just trickles out there is a problem. The small quantity of fuel pumped, 0. The pipe before the pump is under suction so no fuel will leak out to indicate problems.

Leaks in the pipe between the pump and heater can result in fuel leaking.


Eberspacher D7L Parts

Hydronic D5W S дизель — дизельный вариант жидкостного подогревателя известной фирмы Eberspacher. Модель мощностью 5 кВт имеет рабочее напряжение — 12 В. Подогреватель подходит для установки на легковых автомобилях, автофургонах и пикапах с объемом дизельного двигателя от 2 до 4-х литров. Устройство наиболее актуально для использования в условиях умеренного климата.


Control Unit 12v Hydronic D5WZ (Vito,2124), D5W (2162) - 225201045001

If you at least once had to warm up in the frosty morning the engine, freezing in salon, you appreciate this device! Rated voltage — 12 V. Model are suitable for cars, pickups and motor vans with the gasoline engine from 2 to 5 liters. The complete set included a mounting kit. Set of delivery of the heater: Heater The fuel pump with a fastening bracket Water hose 2,2 meters Bracket for fastening of the heater The muffler on an entrance of a combustion air Muffler of exit gases Fuel tube of 5 meters Wiring harness with a block of safety locks The relay for turning on of the fan of the oven of salon Package of plugs, fixture, couplers, bolts and nuts, collars, etc.


Eberspacher D5W



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