Le Tonkinois Varnish
B & D Murkin
UK main importers for
Le Tonkinois varnish
Start failures after first installing.
Ok, you've followed all installation instructions; checked your battery voltage; and switch it on. 60 seconds later, motor speed increases and fuel pump starts to tick -
No problem. What you have probably overlooked is that the fuel pump needs to prime itself and the fuel pipes before it can supply the heater. If the flame sensor fails to detect a flame within 90 seconds of pump starting, the ECU automatically aborts the start, then tries again. Now, assuming you are using the correct piping (1.5mm i.d.) each start attempt theoretically supplies sufficient fuel to fill around 2.26 meters of pipe. But don't forget that the inlet pipe from fuel supply to pump, and the pump itself needs to prime first. How much fuel is required here depends on the distance between supply and pump, but the correct 2 mm i.d of this pipe will fill at the reduced rate of 1.27 meters per start. So an overlength pipe can demand several start attempts before the fuel even reaches the pump.
If you are using clear plastic piping on the outlet side, the fuel flow can be observed by tiny evenly spaced bubbles, but even when it shows the pipe is full more fuel is needed to reach the glowpin chamber and main burner. And if this point is reached a few seconds short of the 90 second mark the heater can fire up, but cut off again before the flame sensor can register. Remember the heater will automatically make two start attempts, but you will then need to switch off and re-
Winter has arrived, and you switch your heater on for the first time. It worked perfectly last winter, but now horror! You have trouble -
Even if your unit performs ok there are still points worthy of consideration. Check your fuel tank for a build-
A cloud of exhaust smoke on the first start-
Generally most failures occur somewhere in the startup sequence. In these cases check the sequence of your model in our faults section, and identify exactly where yours fails. Match it against our faults list to indicate the cause. Also, if you are using red diesel check its condition, as it degrades badly over a period of time. Symptoms are excessive exhaust smoke, fuel has turned darker, layers of black sludge in bottom of tank. These are all symptoms of Diesel Bug; a bacteria becoming more common, particularly in red diesel where the fuel is not regularly replenished.
Of course your problem could be more serious than mentioned above, but surely it is better to sort it out now rather than wait until brass balls begin to be mentioned, and you join the hoard of other users desperately scrabbling to obtain vital heat.
Blown air ducting systems
Having dealt with all major heater problems it is now worth considering potential ones in your blown air ducting.
At face value it is relatively simple to convey your heated air to the point where it is most needed by installing lengths of heater ducting pipe between heater and outlet. However, there are issues which can impair the heater's performance to a great extent. In the first place, all ducting is susceptible to airflow restriction due to drag factors; and the longer the pipe the greater the restriction. Try blowing through a 20cm length of garden hose, then do the same through a 10 metre length and you will see what I mean. This restriction is further increased by "T", "Y", or elbow joints, plus curves, bends and twists in the ducting pipe itself. This situation is easily overlooked as nothing obvious shows. However, it can reach the point where back pressure and heat buildup at the heater end forces heater into overheat mode, or sends it into standby at a lower temperature. And you can't understand why, so tend to blame the heater itself. After all everything looks ok -
With this problem solved there is still a further point to consider -
Have a warm winter.