Warmflow Heat Pump Electric Fast Heating

[GrantMcscott]

Hi

I notice that my heat pump has Electric (Fast) Heating turned on.  The instruction manually is not clear it just stats turn on if needed.  Should it be off or on?

 

Thanks

[sharpener]

It will cost a small fortune to run it when it is not absolutely required to maintain your house at the target temperature, as resistive heating has a CoP of 1.

[GrantMcscott]

16 minutes ago, sharpener said:

It will cost a small fortune to run it when it is not absolutely required to maintain your house at the target temperature, as resistive heating has a CoP of 1.

so should I switch it off then?

[sharpener]

Yes, then see if the house is still warm enough.

Edited February 12, 2024 by sharpener

[IanR]

20 minutes ago, GrantMcscott said:

so should I switch it off then?

 

Yep. Switch it off, and only turn back on if you're struggling to get the house up to temp and you've tried everything else.

[GrantMcscott]

3 hours ago, IanR said:

 

Yep. Switch it off, and only turn back on if you're struggling to get the house up to temp and you've tried everything else.

It will not let me turn it off unless I go in to factory settings and then can disable it.

 

If I disable it what about legionnaires.

[JohnMo]

11 minutes ago, GrantMcscott said:

what about legionnaires.

Do you really need it? I consume most the contents of the cylinder each day, so zero need. If you you take days to consume a cylinder worth if hot water maybe you need it.  Heat Geek have a good write up, worth a read.

[GrantMcscott]

54 minutes ago, JohnMo said:

Do you really need it? I consume most the contents of the cylinder each day, so zero need. If you you take days to consume a cylinder worth if hot water maybe you need it.  Heat Geek have a good write up, worth a read.

Good point, will have a look at the post

[IanR]

1 hour ago, GrantMcscott said:

If I disable it what about legionnaires.

 

Legionella cycle will be handled by the immersion heater in the DHW. The "Electric (Fast) Heating" will be an internal electrical resistance heater within the Heat Pump. The Legionella cycle should be unaffected by disabling the "Electric (Fast) Heating".