Daikin Altherma EHBH08DA6V7 - 5.2.2 Multiple rooms - One LWT zone; Underfloor heating or radiators - Thermostatic valves

5 | Application guidelines
Installer reference guide
28
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
Benefits
▪ Cooling. Heatpump convectors 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 heatpump convectors
5.2.2 Multiple rooms – OneLWT 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 heatpump 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 user interface 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
T
B C
A
a
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface used as room thermostat
▪ The underfloor heating of the main room is directly connected to the indoor unit.
▪ The room temperature of the main room is controlled by the user interface used
as a room thermostat (optional equipment EKRUDAS).
▪ A thermostatic valve is installed before the underfloor heating in each of the
other rooms.
INFORMATION
Mind situations where the main room can be heated by another heating source.
Example: Fireplaces.