Screed heating program. Fluctuation problem?

  • Erstellt am 2020-03-20 12:28:28

M. Gerd

2020-03-20 12:28:28
  • #1
Hello everyone,

our cement screed was heated up in 5°C increments from 25°C to 50°C. The 50°C has now been maintained for 12 days, although it did not always reach 50°C. The craftsmen ventilated more frequently, and since the floor cooled more as a result, it was difficult to maintain the 50°C. Of course, there was still moisture in the screed at the beginning.

Our flow temperature should be a maximum of 35°C, so 50°C should be fine. However, I now have the following questions:

1. Does it have negative effects if the temperature fluctuated between 48°C and 50°C during heating?
2. Someone told me that the temperature of the screed during heating should exceed the flow temperature. In other words, since our flow temperature is 35°C, the screed should also reach 35°C during heating. Is that true? Because I am not sure if that was achieved. Maybe during 1-2 nights, but during the day the screed temperature was 31-33°C due to ventilation.

Best regards
 

wrobel

2020-03-20 19:50:21
  • #2
Hi

1. No
2. Flow temperature is never surface temperature

that is all okay.



Olli
 

M. Gerd

2020-03-21 20:29:45
  • #3
Thank you for the helpful answer!
 

Vicky Pedia

2020-03-22 00:22:12
  • #4
These are pre-programmed heating programs from the manufacturer. "They've got this covered." The main point is to see if the system is leak-proof and if the screed dries evenly (functional heating). So just sit back and watch ...
 

M. Gerd

2020-03-22 18:02:27
  • #5
If only it were that relaxed... First, the heating didn't work until we realized that a fuse from the construction power had blown. Both the manufacturer of the device and the heating engineer were sure that if a fuse from the high-voltage power was blown and thus only 2 phases were available, the device wouldn't turn on at all. No way...

Then it started dripping from the ceiling and I suspect a leak somewhere in the underfloor heating, but that would be off-topic, so there's another thread about it here
https://www.hausbau-forum.de/threads/undichte-Fußbodenheizung-leck.34232/
 

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