Altherma EKHBHE008AA3V3, Operation Manual

Page: 6 / 20

Operation manual
5
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system and options
4PW48442-1B
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 domestic water 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.
Domestic water heating operation (
w
)
In this mode, the indoor unit will deliver hot water to the domestic hot
water tank when the space heating or space cooling operation has
reached its temperature set point.
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 11 ). 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 11 ).
• 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 domestic water heating ( w )
1 Use the v button to activate domestic water 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 domestic water heating: 30°C to 80°C
3 Press the v button to deactivate domestic water 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
■
Refer to the warning mentioned in the chapter
"Introduction" on page 2 concerning domestic
water heating.
■
The domestic hot water temperature set point can
only be set manually (refer to
"Manual operation"
on page 5 ).
■
Any domestic water heating operation is
impossible when the domestic hot water tank is
not installed.
■
When the w icon is blinking, hot water is
delivered to the domestic hot water tank by the
solar kit option and not by the
AD
indoor unit. Refer to
installation manual of the EKSOLHW solar kit.
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).