Daikin EKHBX008BA Series Installation Manual page 26

Detailed description
[0] User permission level
If required, certain user interface buttons can be made unavailable for
the user.
Three permission levels are defined (see the table below). Switching
between level 1 and level 2/3 is done by simultaneously pressing
buttons pfi and pfj immediately followed by
simultaneously pressing buttons s and ba, and keeping all 4
buttons pressed for at least 5 seconds (in normal mode). Note that no
indication on the user interface is given. When level 2/3 is selected,
the actual permission level – either level 2 or level 3 – is determined
by the field setting [0-00].
Button
Quiet mode button s
Weather dependent
ba
set point button
Schedule timer
pr
enable/disable button
Programming button <
pf
i
Time adjust buttons
pf
j
Inspection/test
z
operation button
[1] Weather dependent set point (heating operation only)
The weather dependent set point field settings define the parameters
for the weather dependent operation of the unit. When weather
dependent operation is active the water temperature is determined
automatically depending on the outdoor temperature: colder outdoor
temperatures will result in warmer water and vice versa. During
weather dependent operation, the user has the possibility to shift up
or down the target water temperature by a maximum of 5°C. See the
operation manual for more details on weather dependent operation.
[1-00] Low ambient temperature (Lo_A): low outdoor
temperature.
[1-01] High ambient temperature (Hi_A): high outdoor
temperature.
[1-02] Set point at low ambient temperature (Lo_Ti): the
target outgoing water temperature when the outdoor
temperature equals or drops below the low ambient
temperature (Lo_A).
Note that the Lo_Ti value should be higher than Hi_Ti, as for
colder outdoor temperatures (i.e. Lo_A) warmer water is
required.
[1-03] Set point at high ambient temperature (Hi_Ti): the
target outgoing water temperature when the outdoor
temperature equals or rises above the high ambient
temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
T
t
Lo_Ti
Hi_Ti
Lo_A
T Target water temperature
t
T Ambient (outdoor) temperature
A
= Shift value
Installation manual
24
Permission level
1 2 3
operable — —
operable — —
operable operable —
operable — —
operable — —
operable — —
+ 05
00 Shift value
– 05
Hi_A T
A
[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 rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to local and national regulations.
[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 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).
NOTE If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
[2-04]
22.00 23.00 24.00
[2-02]
EKHBH/X008BA
Indoor unit for air to water heat pump system
4PW54185-1B
t