Nibe FIGHTER 640P, Installation And Maintenance Instructions Manual, Page: 25 / 40

23 FIGHTER 640P
For the Installer
Commissioning and adjusting
Drying process
It is important with some concrete floors with floor heating
to maintain the right temperature in the floor loops directly
after the installation so that the floor dries at the right rate.
FIGHTER 640P is equipped with this function. This means
you can set a program so that a constant flow temperature
is obtained during a specific number of days; followed by
another constant flow temperature during another specific
number of days. This is done as follows:
Activate the drying program by pressing the •
“Operating mode” button at the same time as the
switch is set to “1”. Drying mode is indicated on the
heat pump by the “Circulation pump” lamp flashing.
Set the required number of days and temperature
•
in the two steps by scrolling to channel 24 with the
“Channel selection” button. If this is not the case,
change this by pressing the ”Operating mode” button.
For channel 24 to channel 27 values can be changed
by pressing the “Ventilation” button (the value is in-
creased by one step) alternatively the “Extra hot wa-
ter” button (the value is decreased by one step). The
significance of the numerical value for each channel is
as follows:
Channel 24 number of days in step 1 (preset at three days)
Channel 25
flow temperature in step 1 (preset at 25 °C)
Channel 26
number of days in step 2 (preset at one day)
Channel 27
flow temperature in step 2 (preset at 40 °C)
The setting options for the number of days is one to five
and for the temperature 15 to 50 °C.
Once the set number of days have elapsed FIGHTER 640P
automatically reverts to normal functionality.
If the power is cut, for example, by the power switch being
turned to “0” the drying process is stopped and the set
values return to the preset values as above. This means that
if a power failure occurs before the set time has elapsed,
the program must be reactivated and the values possibly
reset.
Note! During the drying process the compressor is not op-
erational. Hot water production does not occur.