Underfloor Heating Screed Dryout - Daikin EWYA004D2V3P Installer's Reference Manual

12.4.5 Underfloor heating screed dryout

About underfloor heating screed dryout
To program an underfloor heating screed dryout schedule
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
4 Select OK to confirm.
Result: The actuator test run starts. It stops automatically when
ready (±30 min).
To stop the test run manually:
1 In the menu, go to Stop test run.
2 Select OK to confirm.
Possible actuator test runs
▪ Backup heater 1 test
▪ Backup heater 2 test
▪ Pump test
INFORMATION
Make sure that all air is purged before executing the test run. Also avoid disturbances
in the water circuit during the test run.
▪ Bivalent signal test
▪ Alarm output test
▪ C/H signal test
▪ Bizone kit direct pump test (bizone kit EKMIKPOA or EKMIKPHA)
▪ Bizone kit mixed pump test (bizone kit EKMIKPOA or EKMIKPHA)
▪ Bizone kit mixing valve test (bizone kit EKMIKPOA or EKMIKPHA)
Purpose
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.
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.
UFH screed dryout after installation of outdoor unit
If the outdoor ambient temperature and [4‑02] setting > 25°C the backup heater
will perform the screed dryout and supply the leaving water without heat pump
operation.
Duration and temperature
The installer can program up to 20 steps. For each step he needs to enter:
12 Commissioning
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Installer reference guide
191