Hi all

I have a Stuhmr 5kw heatpump connected to my home geyser.  Bought the house with this setup 4 years ago. I do still use the geyser element for heating while the heatpump remains off.  There’s something wrong with this heatpump setup - everything seemingly runs fine but to me, the pump seems confused about water temperatures and runs itself itself flatout into exhaustion and a protection error code. 

I had various electricians, plumbers and “heatpump” specialists out but no one can fix it.  
 

Here’s my take on it: 

- Following all the pipes around the geyser and pump, municipal supply and feed pipes to the bathrooms, it looks to me as if the heatpump inlet is a shared pipe from the municipal supply.

- Reading the heatpump manual and diagrams, the water temperature sensor sits on this inlet.

- That’s why I believe the setup is wrong. The temp sensor would always pick up cold water from fresh municipal supply.  
- In my mind, the heatpump’s water temp sensor should detect how hot/cold is the water coming out of the geyser - not so?

- This I believe is why the heatpump runs and runs and runs itself into exhaustion and an error code - it doesn’t know that the water in the geyser is actually hot.  
 

Now, it might be that I misunderstand the concept of heatpumps, or made a mistake in following the water pipes or made a mistake in reading the heatpump diagrams.  
 

Can anyone recommend a heatpump specialist who can do a callout and come physically inspect my setup to confirm if this is actually the problem?

Pretoria-east  

Thanks!

Christoff

 

Edited January 10, 20233 yr by Christoff83
Forgot to add my location

35 minutes ago, Christoff83 said:

coming out of the geyser - not so?

I would think so...

I don't have a heat pump, nor am I too familiar with these, but in my mind the heat pump is supposed to circulate the water from the HWC through its heating piping and back to the HWC. If it were to take water in from cold water supply it could never get the temperature wanted, I'd imagine...

4 minutes ago, Kalahari Meerkat said:

I would think so...

I don't have a heat pump, nor am I too familiar with these, but in my mind the heat pump is supposed to circulate the water from the HWC through its heating piping and back to the HWC. If it were to take water in from cold water supply it could never get the temperature wanted, I'd imagine...

Thanks for confirmation.  That means to me that this setup is connected wrong or I followed the pipes wrong.  

Really hoping someone here can recommend a proper specialist or plumber who can help me physically inspect the setup properly (at a standard callout fee ofcourse).  
 

thanks again