TIP
You can use “10 days continuous" at start-up
to obtain continuous circulation during a start-
up time in order to make it easier to bleed the
system.
MENU 7.1.2.7 - PUMP SPEED BRINE
Make settings for the brine pump's speed here.
Operating status
Setting range: Fixed delta, Auto, manual
Delta-T
Setting range: 2 - 10 °C
Manual
Setting range: 1 - 100 %
Operating mode: Here you set whether the brine pump
is to be regulated automatically, manually or with fixed
delta.
Fixed delta: Here you set whether the brine pump will
be controlled with fixed delta, e.g. for ground water
systems.
Manual: If you have opted to control the brine pump
manually, you set the desired pump speed here.
MENU 7.1.2.8 - BRINE ALARM SETTINGS
Automatic reset
Setting range: on/off
Minimum brine temperature out
Setting range: -12 – 15°C
Maximum brine temperature in
Setting range: 10 – 30 °C
Automatic reset
Select "automatic reset" if you want S1255 to start
automatically after brine alarm.
Minimum brine temperature out
Set the temperature at which the heat pump is to activ-
ate the alarm for low temperature in outgoing brine.
If "Automatic reset" is selected, the alarm resets when
the temperature has increased by 1 °C above the set
value.
Maximum brine temperature in
Set the temperature at which the heat pump is to activ-
ate the alarm for high temperature in incoming brine.
Select "Alarm activated" to activate the alarm.
MENU 7.1.3 - COMPRESSOR
This menu contains sub-menus where you can make
advanced compressor settings.
MENU 7.1.3.1 BLOCK FREQ
Block freq 1 and 2
Setting range start: 20 – 115 Hz
Setting range stop: 22 – 120 Hz
Maximum setting range: 50 Hz.
Here you can set a frequency range where the com-
pressor is blocked. The limits for the setting range can
differ depending on model of heat pump.
NOTE
A large blocked frequency range can cause the
compressor to run jerkily.
MENU 7.1.5 - ADDITIONAL HEAT
This menu contains sub-menus where you can make
advanced additional heat settings.
MENU 7.1.5.1 - INTERNAL ELECTRIC
ADDITIONAL HEAT
Max connected electrical power 3x400V,
S1255-12 / -16
Setting range: 7 / 9 kW
Max set electrical power
Setting range S1255-6 1x230 V: 0 - 4.5 kW
Setting range S1255-6 3x230 V: 0 - 4.5 kW
Setting range S1255-12 1x230 V: 0 - 7 kW
Setting range S1255-12 3x230 V: 0 - 9 kW
Setting range S1255-6 3x400 V: 0 - 6.5 kW
Setting range S1255-12 & -16 3x400 V: 0 - 9 kW
Here you set the max electrical power for the internal
electric additional heat in S1255, during normal operation
and in overcapacity mode (SG Ready).
MENU 7.1.6 - HEATING
This menu contains sub-menus where you can make
advanced settings for heating operation.
NIBE S1255Chapter 9 | Control - Menus52
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