Description Of The Operation Modes; Space Heating Operation (H); Space Cooling Operation (C); Sanitary Heating Operation (W) - Daikin EKHBH016AA Operation Manual

Description of the operation modes

Space heating operation (
In this mode, heating will be activated as required by the water
temperature set point. The set point can be set manually (refer to
"Manual operation" on page
"Selecting weather dependent set point operation (only in heating
mode)" on page 6).
Startup ( d )
At the start of a heating operation, the pump is not started until a
certain refrigerant heat exchanger temperature is reached. This
guarantees correct startup of the heat pump. During startup, icon
d is displayed.
Defrost ( d )
In space heating operation or sanitary heating operation, freezing of
the outdoor heat exchanger may occur due to low outdoor
temperature. If this risk occurs, the system goes into defrost
operation. It reverses the cycle and takes heat from the indoor
system to prevent freezing of the outdoor system. After a maximum
of 8 minutes of defrost operation, the system returns to space
heating operation.
Space cooling operation (
In this mode, cooling will be activated as required by the water
temperature set point.
NOTE The space cooling temperature set point can only
be set manually (refer to
page 5).
Switching between space heating and space
cooling operation can only be done by pressing
the = button or by an external room thermostat.
Space cooling operation is not possible if the
installation is a "heating only" installation.
Sanitary heating operation (
In this mode, the indoor unit will deliver hot water to the sanitary tank
when the space heating or space cooling operation has reached its
temperature set point. When necessary and when allowed by the
booster heater schedule timer (refer to
booster heating or sanitary heating" on page
provides auxiliary heating for the sanitary water tank.
NOTE As to provide sanitary water throughout the day, it
is advised to keep the sanitary heating operation
on continuously.
The sanitary heating temperature set point can
only be set manually (refer to
on page 5).
Any sanitary heating operation is impossible
when the sanitary tank is not installed.
Powerful sanitary heating operation
In the case of urgent need of sanitary water, the sanitary water
temperature set point can be reached quickly by using the booster
heater. Powerful sanitary heating operation is forcing the booster
heater to operate until the sanitary water temperature set point is
reached.
Quiet mode operation (
Quiet mode operation means that the outdoor unit works at reduced
capacity so that the noise produced by the outdoor unit drops. This
implies that the indoor heating and cooling capacity will also drop.
Beware of this when a certain level of heating is required indoors.
Operation manual
5
)
h
5) or weather dependent (refer to
)
c
"Manual operation" on
)
w
"Programming quiet mode,
9), the booster heater

"Manual operation"

)
s

Controller operations

Manual operation
In manual operation, the user manually controls the settings of the
installation. The last setting remains active until the user changes it or
until the schedule timer forces another setting (refer to
timer operation" on page
As the controller can be used for a wide variety of installations, it is
possible to select a function which is not available on your
installation. In that case the message
Switching on and setting space cooling (
Use the = button to select space cooling (c) or space heating (h).
1
Icon c or h appears on the display as well as the corresponding
water temperature set point.
Use the bi and bj buttons to set the desired water
2
temperature.
• Temperature range for heating: 25°C to 55°C
The temperature for heating can be set as low as 15°C (see
"Field settings" on page
heating should only be set lower than 25°C during commissioning
of the installation. When set lower than 25°C, only the backup
heater will operate.
In order to avoid overheating, space heating is not operable when
the outdoor ambient temperature rises above a certain
temperature (as set through field setting [4-02], refer to
settings" on page
• Temperature range for cooling: 5°C to 22°C
NOTE In heating mode (
can also be weather dependent (icon
This means that the controller calculates the water
temperature
temperature.
In this case, instead of showing the water temperature
set point, the controller shows the "shift value" which
can be set by the user. This shift value 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.
3 Switch on the unit by pushing the y button.
The operation LED
NOTE When the unit is connected to an external room
thermostat, buttons
the icon
thermostat switches the unit on or off and determines
the operation mode (space cooling or space heating).
Selection and setting of sanitary heating (
Use the v button to activate sanitary heating (w).
1
Icon w appears on the display.
Use the wi or wj button to display the actual temperature
2
set point and subsequently, to set the correct temperature.
The actual temperature set point only appears on the display
after pressing one of the buttons
pressed for 5 seconds, the temperature set point will
automatically disappear from the display again.
Temperature range for sanitary heating: 30°C to 80°C
Press the v button to deactivate sanitary heating (w).
3
Icon w disappears from the display.
NOTE Remark that pushing the
on the sanitary water heating. Sanitary water heating
is only switched on or off by means of the
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
6).
n
c ) and heating (
10). However, the temperature for
10).
h ), the water temperature set point
a
set point based on
0 lights up.
= and y are not operable and
e is shown. In this case, the external room
w )
wi or wj
y button has no influence
"Schedule
will appear.
h )
"Field
is shown).
the outdoor
. If no button is
v button.
EKHBH/X016AA
4PW36977-1B