Altherma EKHBHE008AA3V3, Operation Manual

Page: 13 / 20

EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system and options
4PW48442-1B
Operation manual
12
[2] Disinfection function
Applies only to installations with a domestic hot water tank.
The disinfection function disinfects the domestic hot water tank by
periodically heating the domestic water to a specific temperature.
■
[2-00] Operation interval: day(s) of the week at which the
domestic water should be heated.
■
[2-01] Status: defines whether the disinfection function is
turned on (1) or off (0).
■
[2-02] Start time: time of the day at which the domestic water
should be heated.
■
[2-03] Set point: high water temperature to be reached.
■
[2-04] Interval: time period defining how long the set point
temperature should be maintained.
[3] Auto restart
When power returns after a power supply failure, the auto restart
function reapplies the user interface settings at the time of the power
supply failure.
Note that with the function disabled the schedule timer will not be
activated when power returns to the unit after a power supply failure.
Press the
pr button to enable the schedule timer again.
■
[3-00] Status: defines whether the auto restart function is
turned ON (0) or OFF (1).
[4] Space heating off temperature
■
[4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
■
[4-03] Booster heater operation: defines whether the booster
heater operation is enabled (1) or disabled (0).
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
= Shift value
The disinfection function field settings must be configured
by the installer according to national and local regulations.
T
DHW
Domestic hot water temperature
T
U
User set point temperature (as set on the user interface)
T
H
High set point temperature [2-03]
t Time
Space cooling/heating always has priority over the
disinfection function.
The disinfection function is only possible when the unit is
not operating for space cooling/heating.
To allow the disinfection function, the schedule timers must
be used. Set the disinfection function settings so that it is
combined with the domestic hot water function that is
running during disabled space heating/cooling interval. It is
advised to run the disinfection function for minimum 1 hour.
Refer to the extra addendum of the operation manual for
an example pattern.
Lo_Ti
Lo_A Hi_A T
A
T
t
+ 05
00
– 05
Hi_Ti
Shift value
00.00 22.00 24.00 01.00 23.00 t
T
DHW
T
H
T
U
[2-02]
[2-03]
[2-04]
If using a room thermostat, the disinfection function is not
possible as long as the room thermostat demands cooling
or heating. In this case, de-activate the room thermostat
demand by its schedule timer. Refer to the manual of the
room thermostat for a detailed explanation on how to
de-activate space cooling/heating by schedule timer.
NOTE It is therefore recommended to leave the auto restart
function enabled.
Before changing field settings for domestic water heating,
read attentively the warnings mentioned in the paragraph
"Introduction" on page 2 .
NOTE If the booster heater operation is limited than the
booster heater operation is only allowed during
the disinfection function [2]. (Refer to
"[2]
Disinfection function" on page 12 .)