Daikin EPRA10EAV3, Installer'S Reference Manual

Page: 171 / 304

10 | Configuration
Installer reference guide
171
EPRA08~W1 + ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663478-1B – 2022.07
# Code Description
[2.7] [2‑0C] Emitter type :
▪ 0:
Underfloor heating
▪ 1: Fancoil unit
▪ 2: Radiator
The setting Emitter type influences the space heating setpoint range and the
target delta T in heating as follows:
Emitter type Main
zone
Space heating setpoint
range [9‑01]~[9‑00]
Target delta T in heating
[1‑0B]
0: Underfloor
heating
Maximum 55°C Variable (see [2.B.1])
1: Fancoil unit Maximum 55°C Variable (see [2.B.1])
2: Radiator Maximum 70°C Fixed 10°C
NOTICE
The maximum setpoint in space heating depends on the emitter type as can be seen
in above table. If there are 2 water temperature zones, then the maximum setpoint
is the maximum of the 2 zones.
NOTICE
NOT configuring the system in the following way can cause damage to the heat
emitters. If there are 2 zones, it is important that in heating:
▪
the zone with the lowest water temperature is configured as the main zone, and
▪
the zone with the highest water temperature is configured as the additional zone.
NOTICE
If there are 2 zones and the emitter types are wrongly configured, water of high
temperature can be sent towards a low temperature emitter (underfloor heating). To
avoid this:
▪
Install an aquastat/thermostatic valve to avoid too high temperatures towards a
low temperature emitter.
▪
Make sure you set the emitter types for the main zone [2.7] and for the
additional zone [3.7] correctly in accordance with the connected emitter.
NOTICE
Average emitter temperature = Leaving water temperature – (Delta T)/2
This means that for a same leaving water temperature setpoint, the average emitter
temperature of radiators is lower than that of underfloor heating because of a bigger
delta T.
Example radiators: 40–10/2= 35°C
Example underfloor heating: 40–5/2= 37.5°C
To compensate, you can:
▪
Increase the weather-dependent curve desired temperatures [2.5].
▪
Enable leaving water temperature modulation and increase the maximum
modulation [2.C].