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ALDE hot water problem
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userDeffheads
Posted: 18 October 2021 3:06 PM
Subject: ALDE hot water problem
 
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Posts: 248
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Location: Storrington West Sussex and Europe- Dethleffs 7870


We have an early version Alde system and recently, after refilling the system there is a problem with air locks and hot water not warming properly and also insufficient supply. This has never happened before in 5 years of ownership, I am sure it's something to do with air in the system, which I have tried to clear and failed. Any help appreciated.
user747
Posted: 18 October 2021 4:14 PM
Subject: RE: ALDE hot water problem
 


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Posts: 2812
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Location: Tyne and Wear - Burstner Delphin Performance T821


The rads have bleed nipples on them to get rid of air. You need to start with the rads at the highest point as that is where the air will gather. Do every bleed nipple and add fluid as required to keep the correct level in the system. After bleeding run the system and bleed again.

I had the advantage because my m/home was kept on my sloping driveway which eventually shiftedd the air to the highest rad to get rid of the air manually.

On the side of the boiler is a device to automatically remove air but it was ineffective on my 2 m/homes with the Alde system.
userDeffheads
Posted: 18 October 2021 4:32 PM
Subject: RE: ALDE hot water problem
 
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Posts: 248
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Location: Storrington West Sussex and Europe- Dethleffs 7870


Thanks, it's the water heating not the central heating which is working ok.
useronecal
Posted: 18 October 2021 10:30 PM
Subject: RE: ALDE hot water problem
 


50010010010010025


Check and see if the circulation pump is running continuously. This can be checked on the control panel and should only be used for checking the pump etc'
The default setting is "Therm"
You may have changed your settings so need to be reset your control panel
Regards



(Pump setting cont.JPG)



Attachments
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Attachments Pump setting cont.JPG (19KB - 11 downloads)
userDeffheads
Posted: 19 October 2021 7:57 AM
Subject: RE: ALDE hot water problem
 
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Posts: 248
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Location: Storrington West Sussex and Europe- Dethleffs 7870


As said, it's an old system with slide controls, not a modern touch control pad. I don't understand why the air cannot be removed from the water supply.
userbounty hunter
Posted: 19 October 2021 8:52 AM
Subject: RE: ALDE hot water problem
 
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Posts: 251
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Location: Skelmersdale ~ Carthago Opus 6.1 2006


I have the same system as you and sometimes my discharge valve doesn't seal and I have to open and close a couple of times.
Other suggestion is dump the water and refill the system
Good luck

John
user747
Posted: 19 October 2021 9:08 AM
Subject: RE: ALDE hot water problem
 


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Posts: 2812
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Location: Tyne and Wear - Burstner Delphin Performance T821


Air is getting in to the hot water system by the sound of it.

It could be anything from a failed boiler to a leaking joint. I would start by looking for a leak under the vehicle from the drain point.
useronecal
Posted: 19 October 2021 1:36 PM
Subject: RE: ALDE hot water problem
 


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OK, so its the 3010
Did you use a filling pump when filling and bleeding the system ? It really helps

Edited by onecal 2021-10-19 1:47 PM




(Alde Filling pump.JPG)



Attachments
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Attachments Alde Filling pump.JPG (18KB - 9 downloads)
user747
Posted: 19 October 2021 3:42 PM
Subject: RE: ALDE hot water problem
 


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Posts: 2812
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Location: Tyne and Wear - Burstner Delphin Performance T821


onecal - 2021-10-19 1:36 PM

OK, so its the 3010
Did you use a filling pump when filling and bleeding the system ? It really helps


With the analogue controls it is more likely to be the 3000 Compact.
userDeffheads
Posted: 19 October 2021 4:28 PM
Subject: RE: ALDE hot water problem
 
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Posts: 248
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Location: Storrington West Sussex and Europe- Dethleffs 7870


Alde 300 compact system and no problem with the heating side of the boiler, it's just air in the hot and cold pipes.
userKeithl
Posted: 19 October 2021 4:59 PM
Subject: RE: ALDE hot water problem
 


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Location: Birmingham. 2004 Auto-Trail Cheyenne Mercedes 313.


Deffheads - 2021-10-19 4:28 PM

it's just air in the hot and cold pipes.

You mean the water from the fresh water tank to the taps?

If so then you likely have an air leak before the pump, have you cleaned the pre pump filter recently?

Like this thread... https://forums.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Shurflo-filter/59019/

Keith.
user747
Posted: 19 October 2021 5:53 PM
Subject: RE: ALDE hot water problem
 


Forum master

Posts: 2812
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Location: Tyne and Wear - Burstner Delphin Performance T821


Now you say it is hot AND cold water giving problems?

Faulty NRV on the pump. Water running back to tank.

or

Faulty pump.

or

leak inside the tank near the pump (assuming that you have actually looked for a leak elsewhere).

Edited by 747 2021-10-19 5:55 PM
userDeffheads
Posted: 23 October 2021 2:36 PM
Subject: RE: ALDE hot water problem
 
Gets involved

Posts: 248
10010025
Location: Storrington West Sussex and Europe- Dethleffs 7870


Thanks for all replies, I have now sorted the problem by fitting a new pump 30psi Surflow . The pressure is much improved and hopefully the hot water and airlocks are sorted. I was slightly concerned at the life span of the pump as it's only lasted 3 years, but we are full timers.
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