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[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 hot water to a specific temperature.
CAUTION
The disinfection function field settings must be configured
by the installer according to local and national regulations.
■ [2-00] Operation interval: day(s) of the week at which the
domestic hot 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 hot
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.
T
DHW
[2-03]
T
H
T
U
00.00
01.00
T
Domestic hot water temperature
DHW
T
User set point temperature (as set on the user interface)
U
T
High set point temperature [2-03]
H
t
Time
WARNING
Be aware that the domestic hot water temperature at the
hot water tap will be equal to the value selected in field
setting [2-03] after a disinfection operation.
If this high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rises above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to local and national regulations.
CAUTION
Make sure that the disinfection function start time [2-02]
with defined duration [2-04] is not interrupted by possible
domestic hot water demand.
EKHVH/X008BB6V3 + EKHVH/X008BB6+9WN
Daikin Altherma indoor unit
4PW64330-1 – 07.2010
[2-04]
22.00
23.00
24.00
t
[2-02]
According to local and national regulations, it may be
required to disinfect the domestic hot water tank at a higher
temperature (>60°C). In that case Daikin suggests to install
a shunt pump and a heater element parallel on the
domestic hot water tank according to the figure below.
1
6
1
Domestic hot water tank
2
Shunt pump (field supply)
3
Heater element (field supply)
4
Non return valve (field supply)
5
Shower (field supply)
6
Indoor unit
WARNING
Never heat up the domestic water tank temperature
higher than 80°C. This will cause damage to the
equipment and potentially danger of leakage of hot
water which can cause burning wounds.
[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.
It is therefore recommended to leave the auto restart
function enabled.
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).
If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
[4] Space heating off temperature
Space heating off temperature
■ [4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
■ [4-07] Backup heater second step: defines whether backup
heater second step is allowed (1) or not allowed (0).
In this way it is possible to limit the backup heater capacity.
Backup heater capacity limitation: second step disabled (only
for units with a domestic hot water tank installed).
If the storage temperature set point is higher than
50°C, Daikin advises not to disable the backup heater
second step because it will have a big impact on the
required time for the unit to heat up the domestic hot
water tank.
2
3
5
4
Operation manual
14
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