3
x
Operation
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1420944 – 05/2014
Operating instructions
27
3.6.6 Legionella protection
This function serves to prevent bacterial contamination in the hot
water storage tank. For accurate controllers for drinking water hy-
giene, refer to the national provisions.
An active Legionella protection function (parameter [Anti-Le-
gionella day]) involves heating the connected storage tank to a
disinfection temperature 1 x a day or 1 x a week. The legionella
protection function is active for an hour.
Setting the parameters for legionella protection is carried out in
the rotary switch setting
"Configuration"
in level
"DHW
Configuration"
.
Using the factory settings, the storage tank is heated at 03:30
hours if the target hot water temperature is below 65°C at that
time.
More detailed explanations and possible setting values for this function can be seen
in chapter 6.2.4.
3.6.7 Reset to factory settings (Reset)
If the Daikin Altherma EHS(X/H) no longer works properly and
any other cause for the malfunction cannot be detected, it may be
helpful to reset all the controller settings to the factory settings.
There are 3 options for this.
Option 1
User access rights
allow the
switching time program
in the
"Special Level" to be reset to the factory setting according to
tab. 3-8.
1. Press the exit button for at least 5 secs.
Menu
"Special Level"
is displayed.
2. Select the programme
"Timeprog Reset"
with the rotary
switch.
3. Execute the programme by briefly pressing on the rotary
switch.
The respective values are reset to the factory setting.
4. Select
"Return"
with the rotary switch.
5. Confirm the changes with a brief push of the rotary switch.
Possibility 2
Technician access rights
permit all
customer-specific pa-
rameter settings
in the "Special Level" to be reset to the factory
setting according to tab. 6-1 to tab. 6-11.
Possibility 3
If fundamental changes to the Daikin Altherma EHS(X/H)
equipment for the function within the RoCon system are nec-
essary, the
Basic Configuration
can be reset using
Technician
access rights
to the
Factory settings
or can be redefined.
3.6.8 Settings for optional circulation pump
To increase convenience when drawing off hot water we can
switch an optional circulation pump using the Controller RoCon
HP.
There are 2 switching possibilities:
a) Separate timer programme (see section 3.4.7). The
circulation pump operates according to its own timer
programme.
b) Together with a hot water timer programme. The circulation
pump is actuated in parallel with the operating periods of the
hot water timer programme.
Independent of the set timer programme, the energy con-
sumption of the circulation pump van be minimised by operating
it on a cyclic basis. The parameter [Circl-Pump Interval] is used
to set how long the circulation pump is operated within a
15 minute interval.
The Legionella protection function in the Daikin Al-
therma EHS(X/H) is deactivated when leaving the
factory as the possibility of bacterial contamination is
very low:
– Low volume of heat exchanger (stainless steel)
used for heating drinking water.
– Frequent complete water replacement "first-in-first-
out".
– No stagnant water areas in drinking water storage.
The maximum hot water temperature set by the user or
the heating technician is ignored when hot water is
heated for disinfection purposes.
A connected circulation pump is automatically switched
on during thermal disinfection.
After a reset to the factory settings via option 2 or 3, the
system must be configured again by the heating tech-
nician to the installation environment and all the cus-
tomer-specific parameters reset.
