Underfloor Heating Screed Dryout - Daikin ERLA03DAV3 Installer's Reference Manual

10 | Commissioning

10.4.5 Underfloor heating screed dryout

Installer reference guide
144
The underfloor heating (UFH) screed dryout function is used for drying out the
screed of an underfloor heating system during the construction of the building.
The UFH screed dryout function can be executed without finishing the outdoor
installation. In this case, the backup heater will perform the screed dryout and
supply the leaving water without heat pump operation.
If the outdoor unit is not yet installed, connect the main power supply cable to the
indoor unit via X2M/30 and X2M/31. See
4
supply" [ 80].
INFORMATION
▪
If Emergency is set to Manual ([A.6.C]=0), and the unit is triggered to start
emergency operation, the user interface will ask confirmation before starting.
The underfloor heating screed dryout function is active even if the user does NOT
confirm emergency operation.
▪
During underfloor heating screed dryout, pump speed limitation [9‑0D] is NOT
applicable.
NOTICE
The installer is responsible for:
▪
contacting the screed manufacturer for the maximum allowed water
temperature, to avoid cracking the screed,
▪
programming the underfloor heating screed dryout schedule according to the
initial heating instructions of the screed manufacturer,
▪
checking the proper functioning of the setup on a regular basis,
▪
performing the correct program complying with the type of the used screed.
NOTICE
To perform an underfloor heating screed dryout, room frost protection needs to be
disabled ([2‑06]=0). By default, it is enabled ([2‑06]=1). However, due to the
"installer-on-site" mode (see "Commissioning"), room frost protection will be
automatically disabled for 36 hours after the first power-on.
If the screed dryout still needs to be performed after the first 36 hours of power-on,
manually disable room frost protection by setting [2‑06] to "0", and KEEP it disabled
until the screed dryout has finished. Ignoring this notice will result in cracking of the
screed.
NOTICE
For the underfloor heating screed dryout to be able to start, make sure the following
settings are met:
▪
[4‑00]=1
▪
[C‑02]=0
▪
[D‑01]=0
▪
[4‑08]=0
▪
[4‑01]≠1
The installer can program up to 20 steps. For each step he needs to enter:
1 the duration in hours, up to 72 hours,
2 the desired leaving water temperature, up to 55°C.
Example:
"8.3.1 To connect the main power
ERLA03DAV3 + EHFZ03S18DJ3V
4P596821-1A – 2020.05
Daikin Altherma 3 R F