Start-up and inspection
START GUIDE
NOTE
There must be water in the climate system before
S1255 is started.
NOTE
With several heat pumps connected, the start
guide must first be run in the subordinate heat
pumps.
In the heat pumps that are not the main unit, you
can only make settings for each heat pump’s cir-
culation pumps. Other settings are made and
controlled by the main unit.
1. Start S1255 by pressing the on/off button (SF1).
2. Follow the instructions in the display’s start guide. If the
start guide does not start when you start the S1255, you
can start it manually in menu 7.7.
TIP
See the section "Control – Introduction" for a more
detailed introduction to the installation's control
system (operation, menus, etc.).
If the building is cooled when S1255 starts, the compressor
may not be able to meet the entire demand without having
to use additional heating.
Commissioning
The first time the installation is started a start guide is star-
ted. The start guide instructions state what needs to carried
out at the first start together with a run through of the in-
stallation’s basic settings.
The start guide ensures that the start-up is carried out cor-
rectly and, for this reason, cannot be skipped.
Caution
As long as the start guide is active, no function in
the installation will start automatically.
Operation in the start guide
A. Page
B. Menu number
C. Option / setting
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Language
Russiky
A. Page
Here you can see how far you have come in the start guide.
Drag to the right or left with your finger to browse between
the pages.
You can also press the arrows in the top corners to browse.
B. Menu number
Here, you can see which menu in the control system this
page of the start guide is based on.
If you want to read more about the affected menu, either
consult its help menu or read the Installer Manual.
C. Option / setting
Make settings for the system here.
POST ADJUSTMENT AND VENTING
Pump adjustment, automatic operation
Brine side
To set the correct flow in the brine system, the brine pump
must run at the correct speed. S1255 has a brine pump that
is controlled automatically in standard mode. Certain func-
tions and accessories may demand that it be run manually,
in which case the correct speed must be set.
TIP
For optimum operation when several heat pumps
are installed in a multi-installation, all heat pumps
should have the same compressor size.
This automatic control occurs when the compressor is run-
ning and sets the speed of the brine pump so that the optim-
um temperature difference between the supply and return
lines is attained.
29Chapter 6 | Commissioning and adjustingNIBE S1255
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