6 | Application guidelines
Installer reference guide
33
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
Setting Value
External room thermostat for the main
zone:
▪ #: [2.A]
▪ Code: [C-05]
1 (1 contact): When the used
external room thermostat or fan coil
unit can only send a thermo ON/OFF
condition. No separation between
heating or cooling demand.
Benefits
▪ Cooling. Fan coil units provide, besides heating capacity, also excellent cooling
capacity.
▪ Efficiency. Underfloor heating has the best performance with the heat pump
system.
▪ Comfort. The combination of the two heat emitter types provides:
- The excellent heating comfort of the underfloor heating
- The excellent cooling comfort of the fan coil units
6.2.2 Multiple rooms – OneLWT zone
If only one leaving water temperature zone is needed because the design leaving
water temperature of all heat emitters is the same, you do NOT need a mixing
valve station (cost effective).
Example: If the heatpump system is used to heat up one floor where all the rooms
have the same heat emitters.
Underfloor heating or radiators – Thermostatic valves
If you are heating up rooms with underfloor heating or radiators, a very common
way is to control the temperature of the main room by using a thermostat (this can
either be the dedicated Human Comfort Interface (BRC1HHDA) or an external
room thermostat), while the other rooms are controlled by so-called thermostatic
valves, which open or close depending on the room temperature.
Setup
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface (delivered as accessory)
b Dedicated Human Comfort Interface (BRC1HHDA used as room thermostat)
▪ For more information about connecting the electrical wiring to the unit, see
"9.2Connections to the outdoor unit"[478].
▪ The underfloor heating of the main room is directly connected to the outdoor
unit – or to the external backup heater kit, if there is one.
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