Caution
In emergency mode, the display is switched
off. If you feel the selected settings are insuffi-
cient, you will not be able to change these.
MENU 7.1.9 - LOAD MONITOR
Fuse size
Setting range: 1 – 400 A
Transformer ratio
Setting range: 300 – 3,000
Detect phase sequence
Setting range: on/off
Here, you set fuse size and transformer ratio for the
system. The transformer ratio is the factor that is used
to convert the metered voltage to current.
Here you can also check which current sensor is in-
stalled on which incoming phase to the property (this
requires the current sensors to be installed). Perform
the check by selecting "Detect phase sequence".
MENU 7.1.10 - SYSTEM SETTINGS
You make your various system settings for your install-
ation here.
MENU 7.1.10.1 - OPERATING PRIORITY
Setting range: 0 – 180 minutes
Select here how long the installation should work with
each requirement if there are several requirements at
the same time. If there is only one requirement, the in-
stallation only works with that requirement.
If 0 minutes are selected, it means that the demand is
not prioritised but will instead only be activated when
there is no other demand.
OPERATING PRIORITY
Hot water
Heating
Pool 1
Pool 2
Cooling
Min
Pool 1
MENU 7.1.10.2 - AUTO MODE SETTINGS
Stop heating
Setting range: -20 – 40°C
Stop additional heat
Setting range: -25 – 40°C
Filtering time
Setting range: 0 – 48 h
Stop heating, Stop additional heat: In this menu, you set
the temperatures that the system is to use for control
in auto mode.
Caution
It is not possible to set "Stop additional heat"
higher than "Stop heating".
Filtering time: You can set the time over which the aver-
age outdoor temperature is calculated. If you select 0,
the current outdoor temperature is used.
MENU 7.1.10.3 - DEGREE MINUTES SETTING
Current value
Setting range: -3,000 – 100 DM (degree minutes)
Heating auto
Setting option: on/off
Start compressor
Setting range: -1,000 – (-30) DM (degree minutes)
Relative DM Start additional heat
Setting range: 100 – 2,000 DM (degree minutes)
Difference between additional heat steps
Setting range: 10 – 1,000 DM (degree minutes)
Degree minutes are a measurement of the current
heating requirement in the house and determine when
the compressor respectively additional heat will
start/stop.
Caution
A higher value for "Start compressor" can give
more compressor starts, which increases wear
on the compressor. Too low a value can give
uneven indoor temperatures.
MENU 7.2 - ACCESSORY SETTINGS
The operating settings for accessories that are installed
and activated are made in the sub-menus for this.
MENU 7.2.1 - ADD/REMOVE ACCESSORIES
Here, you tell S1255 which accessories are installed.
NIBE S1255Chapter 9 | Control - Menus54
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