Question re supply of Electric to Heater Fan (1 Viewer)

[Emmit]

Hi all,

We are currently in Portugal. We have discovered during the course of the trip that our Battery Charger is terminally duff until I get home. We have with us a vehicle battery charger that has been working well when on sites with electricity but I would like to ask a question in light of an 'incident' that occurred tonight.

SWMBO turned on the tap in the kitchen this evening and the LEDS in the lounge started getting upset.
I realised immediately that the batteries were run down. We have switched the Charger on and everything is back to acceptable.

We already have it mind to change the batteries when we get home but, just so that I can fully understand the way everything works can anyone please answer this question.

Does the fan that operates the blown air heating come direct from the 12v side or is it, in some way connected to the mains side when we are running the mains electric heating. We have the Truma combi with a choice of 900w or 1800w heating and I would like to know whether using that fan has contributed to our lack of 12v electricity. So far on this trip we have managed well with the solar providing top up but, as with most things, we have been making the most of the available 16amp, here on site. It won't be much good to us if we drain the batteries down. Yes, I appreciate that I can continue using the non installed battery charger but I ask the above question just so that I know for the future. We still have several weeks to go on this jaunt.

Sorry for the length of thread. I hope I've made sense.

 

[daveandsan]

I can't be certain but I would think the heater fan only runs off 12v.

 

[TheBig1]

the fan motor draws current from the leisure batteries. when the built in charger is working it supplies generally up to 20amps. so it recharges the batteries quite quickly. a basic stand alone may only supply 8-10amp maximum. this means you will need to run it almost continually to keep up this time of year

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[tonyidle]

As suggested run your charger continually on EHU. A fairly substantial charger (including the one in the van when working) will take several days to recharge each 100Ah from fully discharged. Truma fan runs on 12v as TB1 says.

 

[wigster]

12 v as has been said

 

[Lenny HB]

As said Combi fan runs from 12v. Draws around 5.5 amp on full blast, once van is up to temp & fan drops to min it draws less than 1 amp.

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[Emmit]

Thanks to one and all for your very quick responses.

I did think that the fan was the culprit, but, knowing it, we will get the stand alone heater out when necessary and draw off the mains.
Once again, thank you.

 

[irnbru]

This was suggested to me when we had our last van and seemed to help a lot.

If your battery goes flat then start your engine when turning your heater in for a few mins as the heater needs most power at start up and cool down.
Much warmer in Portugal than Scotland though. It's blowing a hoodie here.

 

[jezport]

This was suggested to me when we had our last van and seemed to help a lot.

If your battery goes flat then start your engine when turning your heater in for a few mins as the heater needs most power at start up and cool down.
Much warmer in Portugal than Scotland though. It's blowing a hoodie here.

Thats only true for a diesel powered heater and only on start up not cool down.

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[Emmit]

I am resuscitating this thread to inform all Funsters on the outcome of our on Board Charger which is a Toptron CH240V1.
As discovered the Charger was Mort.
Through the good offices of others on here, I sent the Charger to David Brannon at Electronic Services.
I described to David prior to sending it what was apparently wrong and he gave me chapter and verse on the probability of the fault(S)
sent it off last Friday and this morning it was returned, fixed with an upgrade and is now working.

Yes, it was expensive to fix (£200) but thats a damn sight cheaper than even trying to source and pay for a new one(£550-£600).

Good service, first class communication and old fashioned values. Well recommended.
www.leisureelectronicrepairs.co.uk
Tel 01745 854495 (After 10.30am please)
Mob 07730 374290====Ditto======
Email electronicserv@btinternet.com

As Usual, I have no connection with the above and supply details for Funsters benefit.