Multiple Rooms - One Lwt Zone - Daikin EWYA004D2V3P Installer's Reference Manual

6 | Application guidelines
6.2.2 Multiple rooms – One LWT zone
Underfloor heating or radiators – Thermostatic valves
Installer reference guide
30
Setting
External room thermostat for the main
zone:
▪ #: [2.A]
▪ Code: [C-05]
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
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 heat pump system is used to heat up one floor where all the rooms
have the same heat emitters.
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
"9.2 Connections to the outdoor
▪ 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.
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.
B C
A
T
a
b
4
unit" [ 76].
Value
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09