Frost Control

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Frost Control - Page 2 Empty Re: Frost Control

Post by PLOUGHLIN on Thu Jan 03, 2019 8:07 pm

As, when traveling, the fresh water pump is disabled, I can't see how it could dump the whole tank contents, Water heater yes but?

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Post by Paulmold on Thu Jan 03, 2019 8:21 pm

PLOUGHLIN wrote:As, when traveling, the fresh water pump is disabled, I can't see how it could dump the whole tank contents, Water heater yes but?
Very true.

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Post by Mike187 on Thu Jan 03, 2019 8:30 pm

You only lose the 10 litres in the heater when the dump valve opens but if drive with a full tank you will lose some through the overflow as the water sloshes about while driving.

The valve opens at about 3 C. I'm not sure if having the tank heater on would prevent it opening on a cold night as any heat would have to travel through the pipework to the valve.

If you don't want to leave the heating on low you could leave the hot water on as that would warm the area where the valve is, least it would on our Broadway.

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Post by Dbvwt on Thu Jan 03, 2019 9:05 pm

PLOUGHLIN wrote:As, when traveling, the fresh water pump is disabled, I can't see how it could dump the whole tank contents, Water heater yes but?

I may be a novice but this was my thought exactly. 
Admittedly it wasn’t completely full but I put 30 litres in (3 x 10l Jerry) before the trip and it was pretty much empty when I reached my destination.
As mentioned, the dump valve was open already so did my 30 litres simply empty on my drive as I was filling it hugegrins
It’s a learning curve alright!
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Post by Mike187 on Thu Jan 03, 2019 9:15 pm

You only lose the water in the tank through the dump valve if you you operate the the pump, been there and done that, wondered why no water was coming out of the tap!!

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Post by jetty on Thu Jan 03, 2019 10:01 pm

Dbvwt

That did happen to me soon after I bought the Nuevo. The dump valve did its job but the following day I forgot to reset it before attempting to add more water to the tank. The water went straight out onto the drive!
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Post by Dbvwt on Thu Jan 03, 2019 10:02 pm

Ah. Right, I think I know what happened.
Arrive on site, switch pump on (not realising the dump valve was open).
Water empties on grass!
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Post by Dbvwt on Thu Jan 03, 2019 10:03 pm

You beat me to it jetty
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Post by inspiredron on Fri Jan 04, 2019 12:18 am

If you try to fill the tank with the dump valve open you will lose water. I've done it frequently at the first fill of the season. If your filling is via a hole in the wall then that may not apply. I'd have to check the piping to work out why it does it on my van.

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Post by Doonhamer5 on Tue Jan 08, 2019 7:59 pm

Gromit wrote:
Dbvwt wrote:Didn’t realise the frost valve had tripped and all my water had gone in transit (can this actually happen or have I missed something?).
I've not experienced it David, but someone asked about this some time ago, probably last winter.

Several people had experienced water loss in transit. Perhaps someone will remember more accurately than me what the consensus of opinion was.  think_smiley_46

We spent last night with friends in the warmth of their house in Cantabria and returned to the van to find the forecast of 1 degree overnight was wrong, van completely frozen and although I’d left the frost protection on, the safety valve had gone and dumped a full tank of fresh water.  I’m not sure whether that happened overnight (van not in usual habitation temperatures) or whether it could have gone after we left Burgos yesterday morning and climbed over the freezing N623 into Cantabria.  There was a lot of water (ice) on the ground in the car park this morning but didn’t look like a full tank’s worth.
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Post by bolero boy on Wed Jan 09, 2019 6:15 am

if you're staying again tonight, I'd plug in and keep the heating on low...

good luck...

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Post by Doonhamer5 on Wed Jan 09, 2019 6:42 am

Now near Poitiers, no EHU.  Although below zero outside the heating is on and the battery is good smile!
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Post by roger7webster on Wed Jan 09, 2019 2:50 pm

On our older van (2004 vintage) we wedged the dump valve shut with a cloths peg. This stopped accidental operation of the valve. Just remember to remove it when the van is not in use
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