Daikin Altherma 3 R F EHVZ04S18E 6V Series - Page 145

10 | Configuration
Installer reference guide
145
ERGA04~08EAV3(A) + EHVZ04+08S18+23EA6V+9W
Daikin Altherma 3 R F
4P629093-1 – 2020.08
# Code Description
[2.A] [C‑05] External room thermostat type for the main
zone:
▪ 1: 1 contact: The used external room
thermostat can only send a thermo ON/OFF
condition. There is no separation between
heating or cooling demand. The room
thermostat is connected to only 1 digital input
(X2M/35).
Select this value in case of a connection to the
heat pump convector (FWXV).
▪ 2: 2 contacts: The used external room
thermostat can send a separate heating/cooling
thermo ON/OFF condition. The room
thermostat is connected to 2 digital inputs
(X2M/35 and X2M/34).
Select this value in case of a connection to the
wired (EKRTWA) or wireless (EKRTR1) room
thermostat
Leaving water temperature: Delta T
In heating for the main zone, the target deltaT (temperature difference) depends
on the selected emitter type for the main zone. In heating mode, deltaT indicates
the temperature difference between the leaving water setpoint and entering
water.
The unit is designed to support underfloor loops operation. The recommended
leaving water temperature for underfloor loops is 35°C. In such case, the unit will
realize a temperature difference of 5°C, which means that the entering water
temperature is around 30°C.
Depending on the installed type of heat emitters (radiators, heat pump convector,
underfloor loops) or situation, you can change the difference between entering
and leaving water temperature.
Note: The pump will regulate its flow to keep the delta T. In some special cases,
the measured deltaT can differ from the set value.
INFORMATION
When only the backup heater is active in heating, deltaT will be controlled according
to the fixed capacity of the backup heater. It is possible that this deltaT is different
from the selected target deltaT.
INFORMATION
In heating, the target deltaT will only be achieved after some operation time, when
the setpoint is being reached, because of the big difference between leaving water
temperature setpoint and inlet temperature at startup.