Daikin EKHBRD011ABV1, Installation Manual, Page: 25 / 48

EKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW60970-1B
Installation manual
22
Setback can be configured for both room temperature control and
leaving water temperature control.
It is advised to set the start time of automatic storage during night
[1-01] on the moment that the setback function starts [2-01].
Refer to "[5] Automatic setback and disinfection set point" on page 22
for temperature set points.
[3] Weather dependent set point
When weather dependent operation is active, the leaving water
temperature is determined automatically depending on the outdoor
temperature: colder outdoor temperatures will result in warmer water
and vice versa. The unit has a floating set point. Activating this
operation will result in a lower power consumption than use with a
manually fixed leaving water set point.
During weather dependent operation, the user has the possibility to
shift up or down the target water temperature by a maximum of 5°C.
This "
" is the temperature difference between the
temperature set point calculated by the controller and the real set
point. E.g. a positive shift value means that the real temperature set
point will be higher than the calculated set point.
It is advised to use the weather dependent set point because it
adjusts the water temperature to the actual needs for space heating.
It will prevent the unit from switching too much between thermo ON
operation and thermo OFF operation when using the remote
controller room thermostat or external room thermostat.
■
[3-00] Low ambient temperature (Lo_A): low outdoor
temperature.
■
[3-01] High ambient temperature (Hi_A): high outdoor
temperature.
■
[3-02] 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.
■
[3-03] 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.
[4] Disinfection function
This mode will disinfect the domestic hot water tank by periodically
heating the domestic water to a specific temperature.
■
[4-00] Status: defines whether the disinfection function is turned
ON (1) or OFF (0).
■
[4-01] Operation interval: day of the week at which the domestic
water should be heated.
■
[4-02] Start time: time at which the disinfection operation is
started
Even if all schedule timers are de-activated and there is no reheat
function active, the disinfection function will operate if a domestic hot
water tank is installed and field setting [4-00] is set to ON.
Refer to "[5] Automatic setback and disinfection set point" for
temperature set points.
[5] Automatic setback and disinfection set point
See also "[4] Disinfection function" on page 22 for more information
about the disinfection operation.
■
[5-00] Set point: disinfection water temperature to be reached
■
[5-01] Interval: time period defining how long the disinfection
temperature set point should be maintained
A Normal room temperature set point
t Time
T Temperature
A Normal leaving water temperature set point
B Leaving water setback temperature
t Time
T Temperature
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
= Shift value
[2-01] [2-02]
A
T
t
21
°
C
[5-03] 18
°
C
[2-01] [2-02]
B
A
T
t
65
°
C
60
°
C
5
°
C [5-02]
Lo_Ti
Lo_A Hi_A T
A
T
t
+ 05
00
– 05
Hi_Ti
Shift value
NOTE If by mistake the value of [3-03] is set higher than the
value of [3-02], the value of [3-03] will always be used.
NOTE If a domestic hot water tank is installed, the disinfection
function is enabled by default.
The disinfection function field settings must be configured
by the installer according to national and local regulations.
A Storage operation (if activated)
B Reheat operation (if activated)
C Disinfection operation (if activated)
Field settings
D Disinfection operation temperature [5-00] (e.g. 70°C)
E Hot water storage temperature [b-03] (e.g. 60°C)
F Reheat maximum water temperature [b-01] (e.g. 45°C)
G Reheat minimum water temperature [b-00] (e.g. 35°C)
t Time
T Domestic hot water tank temperature
A B C
D
E
F
G
T
t
[5-01]
4PW60970-1B_digital_EN.book Page 22 Thursday, September 2, 2010 1:15 PM