6 | Application guidelines
Installer reference guide
32
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
▪ Stylish.
Combination: Underfloor heating + Fan coil units
▪ Space heating is provided by:
- The underfloor heating
- The fan coil units
▪ Space cooling is provided by the fan coil units only. The underfloor heating is shut
off by the shut-off valve.
Setup
A Main leaving water temperature zone
B One single room
a User interface (delivered as accessory)
b Remote controller of the fan coil units
▪ For more information about connecting the electrical wiring to the unit, see
"9.2Connections to the outdoor unit"[478].
▪ The fan coil units are directly connected to the outdoor unit – or to the external
backup heater kit, if there is one.
▪ A shut-off valve (field supply) is installed before the underfloor heating to
prevent condensation on the floor during cooling operation.
▪ The desired room temperature is set via the remote controller of the fan coil
units.
▪ The space heating/cooling demand signal is sent to one digital input on the
outdoor unit (X2M/35 and X2M/30).
▪ The space operation mode is sent by one digital output (X2M/4 and X2M/3) on
the outdoor unit to:
- The fan coil units
- The shut-off valve
Configuration
Setting Value
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
1 (External room thermostat):
Unit operation is decided by the
external thermostat.
Number of water temperature zones:
▪ #: [4.4]
▪ Code: [7-02]
0 (Single zone): Main
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