Daikin EHBX08EA6V - Backup heater and emergency settings

7 Configuration
Installation manual
23
EHBH/X04+08EA/EJ6V+9W
Daikin Altherma 3 R W
4P629081-1A – 2020.08
# Code Item EKHWP
[9.2.1] [E‑07] Tank type 5: EKHWP/HYC
N/A [4-05] Thermistor type 0: Automatic
[5.8] [6-0E] Maximum tank
temperature
≤70°C
In case of EKHWS*D* / EKHWSU*D*, we recommend to use the
following settings:
# Code Item EKHWS*D* / EKHWSU*D*
150/180 200/250/300
[9.2.1] [E‑07] Tank type 0: EKHWS/E 5: EKHWP/HYC
N/A [4-05] Thermistor type 0: Automatic 1: Type 1
[5.8] [6-0E] Maximum tank
temperature
≤75°C
In case of a third-party tank, we recommend to use the following
settings:
# Code Item Third-party tank
Coil≥1.05m² Coil≥1.8m²
[9.2.1] [E‑07] Tank type 0: EKHWS/E 5: EKHWP/HYC
N/A [4-05] Thermistor type 0: Automatic 1: Type 1
[5.8] [6-0E] Maximum tank
temperature
≤75°C
Emergency
When the heat pump fails to operate, the backup heater and/or
booster heater can serve as an emergency heater and take over the
heat load either automatically or by manual interaction.
▪ When Emergency is set to Automatic and a heat pump failure
occurs:
▪ the backup heater automatically takes over the heat load,
▪ the booster heater in the optional tank automatically takes over
the domestic hot water production.
▪ When Emergency is set to Manual and a heat pump failure
occurs, the domestic hot water operation and space heating stops.
To manually recover it via the user interface, go to the
Malfunctioning main menu screen and confirm whether the
backup heater and/or booster heater can take over the heat load
or not.
We recommend to set Emergency to Automatic if the house is
unattended for longer periods.
# Code Description
[9.5] N/A ▪ 0: Manual
▪ 1: Automatic
INFORMATION
The auto emergency setting can be set in the menu
structure of the user interface only.
INFORMATION
If [4‑03]=1 or 3, then Emergency = Manual is not applicable
for the booster heater.
INFORMATION
If a heat pump failure occurs and Emergency is set to
Manual, the room frost protection function, the underfloor
heating screed dryout function, and the water pipe
antifreeze function will remain active even if the user does
NOT confirm emergency operation.
Number of zones
The system can supply leaving water to up to 2 water temperature
zones. During configuration, the number of water zones must be set.
# Code Description
[4.4] [7‑02] ▪ 0: Single zone
Only one leaving water temperature
zone:
a
a Main LWT zone
[4.4] [7‑02] ▪ 1: Dual zone
Two leaving water temperature zones.
The main leaving water temperature
zone consists of the higher load heat
emitters and a mixing station to
achieve the desired leaving water
temperature. In heating:
a
b
c
a Additional LWT zone: Highest
temperature
b Main LWT zone: Lowest temperature
c Mixing station
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
An overpressure bypass valve can be integrated in the
system. Keep in mind that this valve might not be shown
on the illustrations.