ᐅ Screed Heating Protocol Using External Devices or Heat Pump?

The screed report has been requested. It was still undecided whether to use an accelerator or not, but I’m not really under much time pressure.

I said – the point was that it’s like with a new car – it can still go 240 km/h (150 mph) on a highway even when you just drove it off the lot at 0 km (0 miles). Still, everyone advises against it.

Felix1117 schrieb:

I have – the point was that it’s like with a new car – it can reach 150 mph (240 km/h) on the highway when you drive it off the lot at 0 miles, but everyone still advises against it.

Then the heating technician is still stuck in the past. Long and extensive break-in periods for cars have been long gone. Not exactly 100%, but driving a car like that after two years isn’t good either. It’s the same with the heat pump. You start it up and begin with a low temperature, which then slowly increases over several days. Like a car, where you drive the first 300–600 miles (500–1,000 km) at 90–100 mph (150–160 km/h) instead of 150 mph (240 km/h) and then gradually increase speed.
And if you keep the supply temperature at 95–105°F (35–40°C), you are 36–54°F (20–30°C) below the maximum possible – so far from 100%.

P.S. How do you start the freezer? Also at +41°F (5°C) first, then after a few days at 32°F (0°C), etc.? It’s just a heat pump running in reverse.

So, I got it; it will be heated up to 50°C (122°F) for 3-4 days.

Felix1117 schrieb:

So, I received it, and it will be heated up to 50°C (122°F) for 3-4 days.

Well, you have three options:

1. Heating up with external devices, resulting in high electricity costs + the screed installer guarantees the screed
==> correct procedure but with unreasonable temperatures...
2. Heating up with a heat pump (HP) + the screed installer guarantees the screed
==> actually a heavy load on the heat pump due to unreasonable temperatures
3. Heating up with the heat pump at 5°C (9°F) above the maximum planned supply temperature (so probably around 35°C (95°F))
==> easier on the heat pump, significantly lower electricity costs + the screed installer denies any responsibility for damage to the screed

Personally, I would choose option 3, but that is a decision you need to make yourself. I’m not advising you, just outlining the possibilities to help you decide.

P.S. The initial functional heating is intended to stress the screed as much as possible, which explains the high temperatures used in the past. Since I have had the heat pump, I have never heated with more than 30°C (86°F) (at least not down to -10°C (14°F)).

Yes, I see the points similarly. I think I will ultimately choose option 1; in the end, I might save around 1000-1500€ without warranty, but if problems occur, it could cause a lot of trouble.