9 Commissioning
Installer reference guide
62
ERLQ004~008CA + 08S18CB
Daikin Altherma – Low temperature split
4P401676-1 – 2015.02
This 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.
When no outdoor unit is installed yet, then connect the main power
supply cable to the indoor unit via X2M/30 and X2M/31. See
"7.9.7 To connect the main power supply" on page 35
.
INFORMATION
▪ If Emergency is set to Manual ([A.5.1.2]=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 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 "Checklist before 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
▪ [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.
Example:
t
T
A1
25°C (1)
35°C (2)
24h (1)
36h (2)
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
"To set the user
permission level to Installer" on page 39
.
2
Go to [A.7.2]:
> Installer settings > Commissioning > UFH
screed dryout > Set dryout schedule.
3
Use the
,
,
, and
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
Preferential kWh rate power supply cannot be used in
combination with underfloor heating screed dryout.
Prerequisite:
Make sure there is ONLY 1 user interface connected
to your system to perform an underfloor heating screed dryout.
Prerequisite:
Make sure the user interface shows the home screens
and that the space heating and domestic hot water demands are
turned off.
1
Go to [A.7.2]:
> Installer settings > Commissioning > 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
.
15:10
1
14d 12h
25°C
Tue
Screed dryout
Current step
Remaining
Desired LWT
Stop
