Air Source Heat Pumps

lovesgshp

Above the heat pump, are there some valves that are shut on the heating side? They may just look like little pots, with a on/off turn unit underneath. These are the air vents.

Baz@rr

Geotherm wrote: »

Above the heat pump, are there some valves that are shut on the heating side? They may just look like little pots, with a on/off turn unit underneath. These are the air vents.

Not out at the unit. Or did you mean inside the unit itself? The back of the unit looks like this:



The only thing I could see that vaguely matched your description was up at the cylinder. It looks like this:



The issue definitely seems to be connected to the hot water coming on. The HW was set to heat up at 6am today. Came down this morning at 7:30 and the rads were cold. Sure enough, EE 1 displayed on the panel in the garage.

I've been on to the plumber this morning about it, and also to tell them to get some lagging on those outside pipes! Bound to be losing money through them.

lovesgshp

Hi Baz@rr.
The type of vent that I meant is the one shown on your 2nd photo directly by the cylinder sticker. Are there any more that look similar. Looks like it has no tap to close it off, but that is no real problem.
Definately get the outside pipes insulated!!
Forget the pressure guage comment as I misread the guage!!!

Baz@rr

Geotherm wrote: »

Hi Baz@rr.
The type of vent that I meant is the one shown on your 2nd photo directly by the cylinder sticker. Are there any more that look similar. Looks like it has no tap to close it off, but that is no real problem.
Definately get the outside pipes insulated!!
Forget the pressure guage comment as I misread the guage!!!

Can't see any others anywhere, so no idea where they've been hidden. I'll go on a hunt and see if I can find them anywhere.

Baz@rr

Can't find any more of them anywhere. The guy from Grants phoned me back and believes the installers haven't installed the system correctly. No big shock there. He's going to come back out to check water flow, etc.

Something else I noticed tonight - the hot water (heated by immersed) at the kitchen sink is much hotter than from the other taps in the house. Two hours of the immerser and the water from the bath taps is barely above lukewarm whereas from the sink in the kitchen it is scalding hot.

lovesgshp

Having looked at the Duoheat cylinder specs, then the hot water should be the same wherever in the house.
It is always difficult to help remotely, as I hope you understand. It may be a faulty 3 way valve that is causing the problem, with hot water/heating, or air in the system which puts up the alarm/shut off. I do not know the system fully, so my comments are purely based on 7 years of heat pumps.

Harryo

""I've been on to the plumber this morning about it, and also to tell them to get some lagging on those outside pipes! Bound to be losing money through them."" - also the primary heating pipes by the cylinder and between the heat pump and cylinder, if they are not thermally insulated.

lovesgshp

Harryo wrote: »

""I've been on to the plumber this morning about it, and also to tell them to get some lagging on those outside pipes! Bound to be losing money through them."" - also the primary heating pipes by the cylinder and between the heat pump and cylinder, if they are not thermally insulated.

Agree, but the main problem is the current heating and DHW supply, the rest can be resolved after the initial problems are sorted out

TiredGeek

Baz@rr wrote: »

Something else I noticed tonight - the hot water (heated by immersed) at the kitchen sink is much hotter than from the other taps in the house. Two hours of the immerser and the water from the bath taps is barely above lukewarm whereas from the sink in the kitchen it is scalding hot.

They haven't plumbed the other hot water taps into the central heating side of things have they? Sounds dumb but I can't think of any other reason some taps are cool and the kitchen is scolding...

If it's mild where you are maybe try turning the central heating 'stat right down so the heating doesn't come on for a good few hours and see how warm the taps get then, and check if the kitchen is still red hot. If they're stone cold and the kitchen is hot then it sounds like they have got the pipes crossed, if not then there's yet another problem to figure out

Who left those pipes uninsulated, they should be ashamed of themselves. Poor workmanship kills these type of systems.

lovesgshp

TiredGeek wrote: »

They haven't plumbed the other hot water taps into the central heating side of things have they? Sounds dumb but I can't think of any other reason some taps are cool and the kitchen is scolding...

If it's mild where you are maybe try turning the central heating 'stat right down so the heating doesn't come on for a good few hours and see how warm the taps get then, and check if the kitchen is still red hot. If they're stone cold and the kitchen is hot then it sounds like they have got the pipes crossed, if not then there's yet another problem to figure out

Who left those pipes uninsulated, they should be ashamed of themselves. Poor workmanship kills these type of systems.

I try to keep things on the lighter side!! Would have thought the Grant engineer would have stayed longer to make sure that everything was working within the system capability., eg hot water through the entire house and heating working to spec.I spend hours making sure everything is running to specification before I leave a client if there is a problem.