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errmm
@errmm
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Joined: Jan 28, 2026
Last seen: Mar 16, 2026
Profile Activity
Topics: 1 / Replies: 11
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RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

Thanks for such a comprehensive response!!!   The system uses R290 The max it can heat dhw is 50, anything more than that the installer h...

6 months ago
Forum
Domestic Hot Water & Cylinders
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RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

Hi, FYI an update of sorts. So I agree the system doesn't appear to work as a hot water cylinder but instead contains hot water and water is passe...

6 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

Hi After several weeks of pestering, an engineer turned up today to look to fix the issue. The suggestion is that the intake for cold water was pu...

6 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

House was finished several years ago, complicated a bit because home build was impacted by covid. Still waiting for reply from them on what the DHW...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

Hi, No, we're currently in a situation where there isn't a confirmation that there is actually a problem. I've asked the installer to explain exa...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump

Hi, Nothing yet. I've asked customer to measure flow and asked Heliotherm to explain exactly what that other cylinder does because it suggests inst...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If a heat pump can only heat DHW to 50C then what?

@jamespa Attached are a few photos I took from today. I also have a video if that might help. Mike

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If the heatpump can only heat DHW to 50 then what?

Hi, Yes it's a big new house 2022, grand design ish. Probably almost passivhaus standard, EPC A 99.. So there's a circulation pump as well going on...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If the heatpump can only heat DHW to 50 then what?

Hi, The left is the buffer tank, the right is DHW. It's right is one of these It says it's fresh pure hot water on demand. So I don't don't unders...

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If the heatpump can only heat DHW to 50 then what?

7 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: If the heatpump can only heat DHW to 50 then what?

Hi Attached is picture of the tanks. It's a heliotherm. I've spoken with the installer and they mentioned flow rates on showers as well. Mik...

7 months ago
Forum
Domestic Hot Water & Cylinders
Topic
If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump
7 months ago
Forum
Domestic Hot Water & Cylinders
Replies: 31
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