Thread: Remora Professional Invertor ASHP - Temp Swing

Looking at the specification etc of the Remora Professional Invertor ASHP their temperature swing from a set heating temperature is 1 degree either way, so 2 degrees overall. eg if setting to 20 degC the unit kicks in at 19 degC and then heats to 21 degC before knocking off. My previous experience of ASHP is a 0.5 degC swing either side of a set temperature, 1 degC swing overall.

What are peoples opinions of the increased temperature swing either side of a set temperature?

Originally Posted by Awesomehauler

Looking at the specification etc of the Remora Professional Invertor ASHP their temperature swing from a set heating temperature is 1 degree either way, so 2 degrees overall. eg if setting to 20 degC the unit kicks in at 19 degC and then heats to 21 degC before knocking off. My previous experience of ASHP is a 0.5 degC swing either side of a set temperature, 1 degC swing overall.

What are peoples opinions of the increased temperature swing either side of a set temperature?

you should be able to set a 0.5C hysteresis giving you a 1C swing.
I had to get the engineers codes from my supplier (thermotec) for mine but it is a simple thing to do.

I have heard some ASHP companies say it affects the efficiency,
but with a reasonable size pond at reasonable temps for the time of year,
it's not going to be cycling on and off as quickly as it might for an outdoor swimming pool at 30C.

so i don't think it has any bearing on a koi pond, other than smaller swings = less stress on fish having to adapt to the different temperatures.
this is exacerbated at lower winter temps,
where a 2C swing from 10C to 12C in winter is more stressful and can affect food digestion.
than a 22C to 24C swing in summer.

I have also heard that it affects the efficiency of an invertor ASHP, but I also thought in a koi pond setting this will be minimal due to general pond sizes and therefore a longer heating cycle anyway.

I have enquired about whether you can change the setting to allow 0.5degC hysteresis for the 1degC, but was told that this isn't available on this model currently. I'm not sure if I was speaking to the right person, but it was an engineer who works for the distributor, and has access to change the settings on these type units through the inbuilt wifi.

Originally Posted by Awesomehauler

I have also heard that it affects the efficiency of an invertor ASHP, but I also thought in a koi pond setting this will be minimal due to general pond sizes and therefore a longer heating cycle anyway.

I have enquired about whether you can change the setting to allow 0.5degC hysteresis for the 1degC, but was told that this isn't available on this model currently. I'm not sure if I was speaking to the right person, but it was an engineer who works for the distributor, and has access to change the settings on these type units through the inbuilt wifi.

I thought all the inverter models could do a 0.5C hysteresis?
i was eventually swayed away from the remora to a thermotec as someone i know said the remora inverter was constantly defrosting in winter.
and swapped it out for a thermotec inverter model.

i know the non inverter models generally need a bigger hysteresis because they don't modulate, and run either full blast or off.

Mine is quoted as a nominal 1C difference, but in the engineers settings you can change it.

Have a look at this, which seems to be the same menu as a number of ASHPs..... I think from memory (but could be wrong) it is the R04 setting:

http://oasisheatpumps.com/pdf/2019_O...ter_manual.pdf