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NOTICE
The installer is responsible for:
▪ contacting the screed manufacturer for the initial
heating instructions to avoid cracking the screed,
▪ programming the underfloor heating screed dryout
schedule according to the above instruction of the
screed manufacturer,
▪ checking the proper functioning of the setup on a
regular basis,
▪ selecting the correct program complying with the type
of the used screed of the floor.
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 12 hours after the first power-on.
If the screed dryout still needs to be performed after the
first 12 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
▪ [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.
Example:
T
24h (1)
36h (2)
35°C (2)
25°C (1)
A1
T
Desired leaving water temperature (15~55°C)
t
Duration (1~72 h)
(1)
Action step 1
(2)
Action step 2
To program an underfloor heating screed dryout
schedule
1 Set the user permission level to Installer. See
permission level to Installer" on
2 Go to [A.7.2]:
> Installer settings > Commissioning >
UFH screed dryout > Set dryout schedule.
3 Use the
,
,
, and
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"To set the user
page 56.
to program the schedule.
▪ Use
and
to scroll through the schedule.
▪ Use
and
to adjust the selection.
If a time is selected, you can set the duration between 1 and
72 hours.
If a temperature is selected, you can set the desired leaving
water temperature between 15°C and 55°C.
4 To add a new step, select "–h" or "–" on an empty line and
press
.
5 To delete a step, set the duration to "–" by pressing
6 Press
to save the schedule.
It is important that there is no empty step in the program.
The schedule will stop when a blank step is programmed
OR when 20 consecutive steps have been executed.
To perform an underfloor heating screed dryout
INFORMATION
In case of third-party gas boiler. Only the heat pump is
used during the underfloor heating screed dryout.
Possible consequence: Underfloor heating screed dryout
is not possible at low outdoor temperatures.
Prerequisite: Make sure there is ONLY 1 user interface connected
to your system to perform an underfloor heating screed dryout.
Prerequisite: Make sure that the leaving water temperature home
page, room temperature home page, and domestic hot water home
page are turned OFF.
> Installer settings > Commissioning >
1 Go to [A.7.2]:
UFH screed dryout.
2 Set a dryout program.
3 Select Start dryout and press
4 Select OK and press
.
Result: The underfloor heating screed dryout starts and following
screen will be shown. It stops automatically when done. To stop it
manually, press
, select OK and press
Tue
Screed dryout
1
Current step
Remaining
14d 12h
25°C
Desired LWT
Stop
To readout the status of an underfloor heating
screed dryout
1 Press
.
2 The current step of the program, the total remaining time, and
the current desired leaving water temperature will be displayed.
INFORMATION
There is limited access to the menu structure. Only the
following menus can be accessed:
▪ Information.
▪ Installer
settings > Commissioning > UFH
screed dryout.
To interrupt an underfloor heating screed dryout
When the program is stopped by an error, an operation switch off, or
a power failure, the U3 error will be displayed on the user interface.
To resolve the error codes, see
90. To reset the U3 error, your User
error codes" on page
permission level needs to be Installer.
1 Go to the underfloor heating screed dryout screen.
12 Commissioning
.
.
.
15:10
"15.6 Solving problems based on
Installer reference guide
81
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