Underfloor Heating Screed Dryout - Daikin Altherma 3 GEO Series Installer's Reference Manual

11 Commissioning
5 Select OK to confirm.
Result: The Backup heater phase 2 test run
starts. The current sensor values first show the
values without the backup heater. After 10 seconds,
one of the 3 values will change due to the backup
heater becoming active on that phase. Remember or
write down the current sensor of which the value
increases.
6 Switch the terminals of the current sensor wires
according to the table below. Perform steps 1 to 6
until no more wires have to be switched.
Current sensor of which value
changed
Backup heater Backup heater
phase 1 phase 2
CT2
CT1
CT3
CT1
CT2
CT3
CT1
CT3
CT2
11.4.5

Underfloor heating screed dryout

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.
Conditions: Make sure all operation is disabled. Go to [C]:
Operation and turn off Room, Space heating/cooling and Tank
operation.
INFORMATION
▪ If Emergency is set to Manual ([9.5.1]=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.
Installer reference guide
90
—
Action to take
First switch Then switch
terminals... terminals...
Do nothing —
15 and 16 —
14 and 15 —
14 and 15 14 and 16
14 and 15 14 and 16
14 and 16 —
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:
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
change the user permission
2 Go to [A.4.2]: Commissioning > UFH screed
dryout > Program.
3 Program the schedule:
To add a new step, select an empty line and change
its value. To delete a step and all steps below it,
decrease the duration to "–".
▪ Scroll through the schedule.
▪ Adjust the duration (between 1 and 72 hours) and
temperatures (between 15°C and 55°C).
4 Press the left dial to save the schedule.
To perform an underfloor heating screed dryout
Conditions: An underfloor heating screed dryout schedule has been
programmed. See "To program an underfloor heating screed dryout
schedule" [ 4 90].
Conditions: Make sure all operation is disabled. Go to [C]:
Operation and turn off Room, Space heating/cooling and Tank
operation.
1 Set the user permission level to Installer. See
change the user permission
2 Go to [A.4]: Commissioning > UFH screed dryout.
3 Select Start UFH screed dryout.
4 Select OK to confirm.
Result: The underfloor heating screed dryout starts.
It stops automatically when done.
5 To stop the underfloor heating screed dryout
manually:
1 Open the menu and go to Stop UFH screed
dryout.
2 Select OK to confirm.
To read out the status of an underfloor heating
screed dryout
Conditions: You are performing an underfloor heating screed
dryout.
t
"To —
level" [ 4 55].
—
"To —
level" [ 4 55].
—
EGSAH/X06+10DA9W(G)
Daikin Altherma 3 GEO
4P569820-1A – 2019.09