Daikin Altherma EHYKOMB33AA - Underfloor Heating Screed Dryout

12 | Commissioning
Installer reference guide
201
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
INFORMATION
Make sure that all air is purged before executing the test run. Also avoid disturbances
in the water circuit during the test run.
▪ Solar pump test
▪ Shut-off valve test
▪ 3-way valve test
▪ Alarm output test
▪ Cooling/heating signal test
▪ Quick heat-up test
▪ DHW pump test
▪ Gas boiler test
▪ Bypass valve test
INFORMATION
The setpoint during a boiler test run is 40°C. Keep in mind the 5°C overshoot that is
possible during boiler operation, especially in combination with floor heating loops.
12.4.5 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.
This function can be executed without finishing the outdoor installation. In this
case, the gas boiler 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 "9.3.2To connect the main power
supply of the indoor unit"[4118].
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.