HXHD125A7V1B
VRVIII system indoor unit
4PW62585-1 – 11.2010
Operation manual
10
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
w
button to enable reheat operation.
The
w
icon will display.
2
Press the
w
button again to disable reheat operation.
The
w
icon disappears.
The reheat minimum and reheat maximum temperature set points
are field settings. Refer to
"5.12. Field settings" on page 18
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 8
).
■
[b-01]
Set point: reheat maximum temperature (see figure
"Domestic water heating modes" on page 8
).
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
w
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
"5.12. Field settings" on page 18
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 8
).
■
[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.
5.5.
Other operation modes
Start up operation (
d
)
During start up, the
d
icon displays, indicating that the heat
pump is starting up and is not working in a steady state condition.
Defrost operation (
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. During defrost operation, space heating or domestic hot
water operation is not possible.
Quiet mode operation (
s
)
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
s
button to activate quiet mode operation.
The
s
icon displays.
If the controller is set to permission level 2 or 3 (refer to "Field
settings" in the installation manual), the
s
button is not
operable.
2
Press the
s
button again to deactivate quiet mode operation.
The
s
icon disappears.
There are 3 different levels of quiet mode operation. The desired
quiet mode is set through a field setting. Refer to
"5.12. Field
settings" on page 18
for a detailed description how to set one or more
field settings.
■
[8-03]
Status: defines the level of low noise operation (quiet
mode).
INFORMATION
Remark that the
w
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.
INFORMATION
Remark that pushing the
y
button has no influence on
the domestic water heating. Domestic water heating is only
switched on or off by means of the
w
button and/or
disabling the storage schedule timer.
INFORMATION
Remark that the
w
icon will only be blinking during
effective operation.
During the operation it is always possible to cancel the
disinfection function by pushing the
w
button once.
Be aware that after pushing the
w
button, it is possible
that the permanently lit
w
icon still displays, meaning that
the reheat function is enabled.
NOTICE
If a domestic hot water tank is installed, the disinfection
function is enabled by default.
