Le Tonkinois Varnish
B & D Murkin
UK main importers for
Le Tonkinois varnish
Flexidisc sander
Page 1 covers Airtronic models D2 D4 D5
Page 2 covers older models D1LCC, D1LC, D1L, B2L, D2L, BN2
Page 3 covers older models D3LCC, D3LC, D3L.
Page 4 covers older models D5LC, D5L, D4L.
Manufactured 2003* onwards, current model.
Automatic settings Boost High Med Low Standby.
Heat output 2200 1800 1200 850 0 watts.
Fuel consumption 0.28 0.23 0.15 0.10 0 l/hr.
Power consumption 34 22 12 8 5 watts
Current 12v approx 3 2 1 0.6 0.5 amps
Current 12v start, glow pin on, 10 amps for about 3 minutes
Current 12v heater off 0 amps
Length 310, Width 115, Height 112 mm
Combustion air inlet pipe 25 mm
Exhaust outlet pipe 24 mm.
D2 with outlet hood Ø 60 mm, ducting guide number 6
D2 with outlet hood Ø 75 mm, ducting guide number 12
Spare parts availability Current model
Links for downloading manuals see Manuals page.
Wiring connection details see Wiring page.
Ducting information see Ducting pages.
Full servicing information see Airtronic Service pages.
Fault finding information see Faults pages.
Airtronic D4 & D4 Plus
Manufactured 2003* onwards, current model.
Automatic settings Boost High Med Low Standby.
Heat output 4000 3000 2000 900 0 watts.
Fuel consumption 0.51 0.38 0.25 0.13 0 l/hr.
Power consumption 40 24 12 7 0 watts
Current 12v approx 3.5 2 1 0.5 0 amps
Current 12v start, glow pin on, 10 amps for about 3 minutes
Length 376, Width 140, Height 150 mm.
Combustion air inlet pipe 25 mm, Exhaust outlet pipe 24 mm.
Higher heat model of the D2 with similar construction.
D4 with outlet hood Ø 75 mm, ducting guide number 3
D4 with outlet hood Ø 90 mm, ducting guide number 10
D4 Plus with outlet hood Ø 75 mm, ducting guide number 10
D4 Plus with outlet hood Ø 90 mm, ducting guide number 15
Note right angled outlet hood must not be used with D4 Plus, see ducting pages
Spare parts availability Current model
Links for downloading manuals see Manuals page.
Wiring connection details see Wiring page.
Ducting information see Ducting pages.
Full servicing information see Airtronic Service pages.
Fault finding information see Faults pages.
Airtronic D4 variants
Airtronic D4 Short duct length rating of 3m
Airtronic D4 Plus -
Airtronic D4S, D4 Camper or Airtronic D3 -
Slower fan speed for lower noise, different ECU.
Manufactured 2005* onwards, current model.
Automatic settings Boost High Med Low Standby.
Heat output 5500 4800 2700 1500 0 watts.
Fuel consumption 0.75 0.65 0.37 0.27 0 l/hr.
Power consumption 85 80 30 15 0 watts
Current 12v approx 7 6.5 2.5 1 0 amps
Current 12v with glow pin on during start approx 21 amps
Length 530, Width 170, Height 185 mm.
Combustion air inlet pipe 25 mm
Exhaust outlet pipe 24 mm.
D5 with outlet hood Ø 90 mm, heater guide number 10
The Airtronic D5 construction is significantly different from the Airtronic D2 and D4 models as it is an updated older D5LC design. Heat exchanger, glow pin and screen are D5LC type.
Essentially it is the D5LC body fitted with a new ECU and the separate sensors replaced by a combined sensor. It does not have the lower start current advantages and the easier servicing of the other Airtronic models. Higher start current needs thicker power supply cables.
The smaller grommet on the upper case gives access to a rotary valve which is in the combustion air feed to set the fuel mixture. Treat it as a factory setting and leave alone unless a gas analyser is available.
Spare parts availability Current model.
Links for downloading manuals see Manuals page.
Wiring connection details see Wiring page.
Ducting information see Ducting pages.
Fault finding information see Faults pages.
Servicing details for the Airtronic D5 differ from the other Airtronic models and are included on our servicing pages.
Photographs showing each stage during servicing would be welcome for including on our site.
Eberspacher Diesel Air Heater Models
Eberspacher have introduced new air heater models S2 D2L and D4L to replace the D2 and D4.
You would have thought they would be keen to promote them on our site and to answer simple technical questions on them. When I contacted Eberspacher UK after our friendly technical guy left the firm his replacement did not want a relationship with us, and said he would get back to me shortly. His version of shortly was over two and a half years and that email was to confirm no co-
Hence I have made the decision not to include material on those heaters and will not be supporting users of them who have problems. We will continue to advise on the older heaters.
Eberspachers site no longer mentions the S2 D2L and S4L, they are being replaced by S3 models.
Replacement of models so soon after introduction is not usual for Eberspacher, I have absolutely no evidence but my suspicions are the S2 models might have problems. That could explain why they do not want us to know more about them.
Eberspacher now only seem interested in supplying vehicle manufacturers, not individual buyers.
Since we lost Eberspacher co-
The 2KW version D2L with full kit looks to be about £800 on eBay 2021.
A Yachting Monthly review quoted Kit, installation, labour and VAT as £2,290 horrendously expensive.
The older Airtronic D2 with full kit is about £650 on eBay
Chinese heaters are exceptionally cheap, showing the true price of production.
Chinese diesel heater with full kit is about £110 on Amazon 2021, including controller, pump & other parts.
Chinese heaters quality is lower than Eberspacher but at that price you can buy one and a spare plus if you wanted have another 2 spares for those and still be a lot cheaper than an Eberspacher.
1 Current Eberspacher Heater Models we support
Eberspacher current diesel heater models with brief details, for older models see the other pages.
* Dates are a general indication only, nearly all are very much best guesses as date information is not published. The data is a quick guide for users buying second hand heaters, check with the Eberspacher manuals if it is critical.
Models are produced in 12 or 24 volt versions. The highest heat models are not included.
Read our Buying advice page before buying to avoid very expensive mistakes like non standard heaters.
Click on images for better quality.
Eberspacher Airtronic D2 Heater
Eberspacher D2 and D4 heaters together to show size differences. D2 uppermost.
Airtronic D2 fitted with a right angled hood. This can also be fitted sideways or upside down.
Note that fitting a right angled hood will significantly reduce the permitted ducting length & fittings allowance.
Hoods from other models will not fit, even if similar size.
Airtronic D2 heater.
Heating air inlet left, Heated air outlet hood right.
Bottom:-
The Airtronic D3 heater model is not sold in the UK.
It is a de-
They only have a duct rating factor of 3m, so not normally used in boats.
The parts are all the same as the Airtronic D4 except for the ECU.
The D8LC is only included here to show higher heat versions are available. Generally these are fitted to larger boats / busses and would presumably be professionally installed & maintained.
Construction is significantly different from Airtronic models.
The 7 day timer manual mentions its output needs a relay fitted as the D8LC carries a load on the switch wire, this presumably will apply for all controllers.
Unlike the Airtronic heaters the D8LC does not have an internal temperature sensor and it always requires an external sensor fitted. It will not work without it
The reason for having this site is to promote our Le Tonkinois natural varnish and Flexidisc sander products, we hope you will look at those pages as well as these.