Operation manual
9
EKHBRD011~Y1
Indoor unit for air to water heat pump system and options
4P402192-1A – 2015.04
Reheat
This mode will prevent the domestic hot water from cooling down
lower than a certain temperature. When enabled the indoor unit will
deliver hot water to the domestic hot water tank when the reheat
minimum value is reached. The domestic water heating will continue
until the reheat maximum temperature is reached.
Selecting reheat operation for domestic water heating
1
Use the
button to enable reheat operation.
The
icon will display.
2
Press the
button again to disable reheat operation.
The
icon disappears.
The reheat minimum and reheat maximum temperature set points
are field settings. Refer to the chapter
"Field settings" on page 16
for
a detailed description how to set one or more field settings.
■
[b-00] Set point: reheat minimum temperature (see figure
"Domestic water heating modes" on page 7
).
■
[b-01] Set point: reheat maximum temperature (see figure
"Domestic water heating modes" on page 7
).
Disinfection operation
This mode will disinfect the domestic hot water tank by periodically
heating the domestic water to a specific temperature. During the
operation of this mode the
icon will be blinking rapidly with 0.5
second intervals.
The disinfection temperature set point is a field setting as are the
retention time, day and hour. Refer to the chapter
"Field settings" on
page 16
for a detailed description how to set one or more field
settings.
■
[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.
■
[5-00] Set point: Disinfection water temperature to be reached
(see figure
"Domestic water heating modes" on page 7
).
■
[5-01] Duration: time period defining how long the disinfection
set point temperature should be maintained.
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.
Emergency operation
■
[8-02] Emergency operation
During emergency mode, heating is only done by the heater kit,
not by the heat pump.
Activation of emergency mode is done by changing field setting
[8-02]=1.
Activating the emergency mode will stop the heat pump
operation. The pump of the indoor unit will be started, but
heating itself is done by the heater kit. If there are no error
conditions in leaving or returning water thermistors, the heater
kit can start to follow emergency operation.
Other operation modes
Start up operation (
)
During start up, the
icon displays, indicating that the heat
pump is starting up and is not working in a steady state condition.
Defrost operation (
)
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 12 minutes of defrost operation, the system returns to space
heating operation.
Quiet mode operation (
)
Quiet mode operation means that the indoor unit works at reduced
compressor speed so that the noise produced by the indoor unit
drops. This implies that it will take longer till the required temperature
set point is reached. Beware of this when a certain level of heating is
required indoors.
Selecting quiet mode operation
1
Use the
button to activate quiet mode operation.
The
icon displays.
If the controller is set to permission level 2 or 3 (refer to "Field
settings" in the installation manual), the
button is not
operable.
2
Press the
button again to deactivate quiet mode operation.
The
icon disappears.
There are 3 different levels of quiet mode operation. The desired
quiet mode is set through a field setting. Refer to the chapter
"Field
settings" on page 16
for a detailed description how to set one or more
field settings.
■
[8-03] Status: defines the level of low noise operation (quiet
mode).
NOTE
Remark that the
icon will be continuously lit as
long as the reheat function is enabled. It is not
possible to see when the indoor unit is reheating
the domestic hot water tank.
NOTE
Remark that pushing the
button has no influence
on the domestic water heating. Domestic water heating
is only switched on or off by means of the
button
and/or disabling the storage schedule timer.
NOTE
Remark that the
icon will only be blinking during
effective operation.
During the operation it is always possible to cancel the
disinfection function by pushing the
button once.
Be aware that after pushing the
button, it is possible
that the permanently lit
icon still displays, meaning
that the reheat function is enabled.
NOTE
If a domestic hot water tank is installed, the disinfection
function is enabled by default.
NOTE
Before activating emergency operation, be sure to
activate the heater kit. The heater will stay in
emergency mode until the field setting is set back
to default [8-02]=0.
