Pump/Water/Boiler issues

[GeoffnDee]

The Reich power jet 22 does not appear to have a non-return valve (which may be the cause of your problem) and there a 2 types of the same Reich 19l twin pump one with a non-return valve and one without a valve.
Hopefully the one you have to try is the type with a non-return valve fitted.

 

[bruno66]

Aha! Do you think we're finally getting somewhere? So if a non non-return valve pump is fitted that would give an issue where the boiler isn't getting correct flow of water into it and so preventing heating of it?

 

[GeoffnDee]

Without a non-return valve either at the pump or elsewhere I do not think that the combi would fill correctly so I would expect this to effect its water heating . It would effect the tap water flow which also should improve if you can fit a pump with a non-return valve. (hopefully this is the problem and may be the answer , Good luck )

 

[Lenny HB]

Hi again Lenny, thanks for your reply. You must have the patience of a saint!

I think the tap issue seems to have sorted. I removed the two spade connections from the tap, re connected them the other way round, then back to the correct way (I think!) and pushed them well home and hey presto the tap is working now. Does that seem like something that could be a scenario that you'd expect, some sort of electrical glitch?

With the boiler, I'm getting full flow just not hot. There is warm air from the heating so would that not suggest the combi is working ok or does it not work like that? I don't think I have the option to heat the water off mains. I thought it was a gas only option would the photo I'm attaching now give any clues?

From reading the Truma booklet it does appear that the heating can be run without water though so that should maybe give me clue that the hot water and heating are completely separate....

Yes if you only have that control it is gas only.

Would you expect the connection from the pump to supply to be as in this photo? Or should it be blue to green with brown to pink?

May be the wrong way round, although Hymer wiring is blue for positive, brown for earth, Reich pumps are brown for positive & blue for earth and the positive pump wire in Hymers is pink.
However the pump will run either was round although a lot slower if connected the wrong way.

If the cold is flowing normally and not spluttering it won't be a non return valve problem.
The other thing to check is the vent valve at the top of the boiler it's a T piece with a valve in it that the hot feed connects to, it allows air out while the boiler is filling.

 

[bruno66]

Without a non-return valve either at the pump or elsewhere I do not think that the combi would fill correctly so I would expect this to effect its water heating . It would effect the tap water flow which also should improve if you can fit a pump with a non-return valve. (hopefully this is the problem and may be the answer , Good luck )

Thank you again GeoffnDee, I really do hope so!

I'll have a go later this morning with it, I'll let you know how I get on!

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[bruno66]

Yes if you only have that control it is gas only.

May be the wrong way round, although Hymer wiring is blue for positive, brown for earth, Reich pumps are brown for positive & blue for earth and the positive pump wire in Hymers is pink.
However the pump will run either was round although a lot slower if connected the wrong way.

If the cold is flowing normally and not spluttering it won't be a non return valve problem.
The other thing to check is the vent valve at the top of the boiler it's a T piece with a valve in it that the hot feed connects to, it allows air out while the boiler is filling.

I did wonder if brown to pink, blue to green felt a more natural connection but not being electrically minded I wasn't sure, so thanks for that knowledge Lenny!

Ok I'll have to take the boards off in the garage to check as I can't actually see the boiler, worth doing it to check that though, thanks again for that tip too

 

[bruno66]

One more stupid question if I can, the hose connection that's on from the pump to cap seems just not to be right. Too thick outer casing for my liking (I actually snapped a previous twin pump trying to attach it to the hose, that's the reason I now have the power jet on ) , would there be a recommendation of what hose to get and where I'd possibly find it?

 

[Landy Andy]

The connections to and from the pump NEED to be fully watertight and secure. If not it will cause leaks, spluttering from air entering the system, and poor flow, due to lost pressure.

 

[bruno66]

The connections to and from the pump NEED to be fully watertight and secure. If not it will cause leaks, spluttering from air entering the system, and poor flow, due to lost pressure.

Yup that's about the only thing I managed to do right!

 

[GeoffnDee]

Also I'm wondering does the water always seems like it's airlocked. I usually expect after refilling the system after draining down that there is spluttering before proper flow, when air is being pushed out, but it seems to be happening every time after I've switched off the taps for 5 minutes or so that the system still has the air lock in it. I'd expect after the initial spluttering etc, once that flow is normal then it should continue that way not be spluttering again on consecutive tap operation?

bruno66 The lack of a non-return valve may well be the cause of the above problem and maybe the Combi problem as Truma state that a non-return valve must be in place when an in- tank type pump is being used for water supply to their Combi unit .
A Caravan shop may have the water pump hose you need (or maybe an Aquatic shop ?)

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[bruno66]

bruno66 The lack of a non-return valve may well be the cause of the above problem and maybe the Combi problem as Truma state that a non-return valve must be in place when an in- tank type pump is being used for water supply to their Combi unit .

Sounds like it is that then GeoffnDee, I'll be having a go at it later on today. Fingers crossed you're absolutely spot on, it certainly sounds like it!

 

[bruno66]

I am very pleased to say I now have proper water supply and hot!!!

A very big thank you very much indeed to all for every bit of input. I was in despair with it, feeling pretty useless so your help has been invaluable to me.

What a fantastic resource this place is!

Thanks again all