Daikin EKHBH016AA, Руководство по эксплуатации

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Operation manual
5
EKHBH/X016AA
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36977-1B
Description of the operation modes
Space heating operation (
h
)
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 5 ) or weather dependent (refer to
"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 (
c
)
In this mode, cooling will be activated as required by the water
temperature set point.
Sanitary heating operation (
w
)
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
"Programming quiet mode,
booster heating or sanitary heating" on page 9 ), the booster heater
provides auxiliary heating for the sanitary water tank.
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 (
s
)
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.
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
"Schedule
timer operation" on page 6 ).
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
n will appear.
Switching on and setting space cooling ( c ) and heating ( h )
1 Use the
=
button to select space cooling (
c
) or space heating (
h
).
Icon c or h appears on the display as well as the corresponding
water temperature set point.
2 Use the bi and bj buttons to set the desired water
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 10 ). However, the temperature for
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
"Field
settings" on page 10 ).
• Temperature range for cooling: 5°C to 22°C
3 Switch on the unit by pushing the y button.
The operation LED 0 lights up.
Selection and setting of sanitary heating ( w )
1 Use the v button to activate sanitary heating ( w ).
Icon w appears on the display.
2 Use the
wi
or
wj
button to display the actual temperature
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
wi or wj . If no button is
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
3 Press the
v
button to deactivate sanitary heating (
w
).
Icon w disappears from the display.
NOTE
■
The space cooling temperature set point can only
be set manually (refer to
"Manual operation" on
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.
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
"Manual operation"
on page 5 ).
■
Any sanitary heating operation is impossible
when the sanitary tank is not installed.
NOTE In heating mode ( h ), the water temperature set point
can also be weather dependent (icon a is shown).
This means that the controller calculates the water
temperature set point based on the outdoor
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.
NOTE When the unit is connected to an external room
thermostat, buttons
= and y are not operable and
the icon e is shown. In this case, the external room
thermostat switches the unit on or off and determines
the operation mode (space cooling or space heating).
NOTE Remark that pushing the y button has no influence
on the sanitary water heating. Sanitary water heating
is only switched on or off by means of the
v button.