Nibe S1155PC Installer Manual page 53

Caution
When heating/cooling sensors BT74) have been
connected and activated in menu 7.4, no other
sensor can be selected.
Heating/cooling sensor
An extra temperature sensor can be connected to
S1155PC in order to determine when it is time to switch
between heating and cooling operation.
When several heating/cooling sensors have been in-
stalled, you can select which sensor should be in control.
If BT74 is installed, this is always in control and no set-
ting can be made.
Set point value, heating/cooling sensor
Here you can set at which indoor temperature S1155PC
is to shift between heating respectively cooling opera-
tion.
Heating at room sub temp
Here you can set how far the room temperature can
drop below the desired temperature before S1155PC
switches to heating operation.
Cooling at room over temp
Here you can set how high the room temperature can
increase above the desired temperature before S1155PC
switches to cooling operation.
Time between heating and cooling
Here you can set how long S1155PC is to wait before
it returns to heating mode when the cooling demand
has ceased or vice versa.
MENU 7.1.8 - ALARM
In this menu, you make settings for the safety measures
that S1155PC will implement in the event of any opera-
tional disruption.
MENU 7.1.8.1 - ALARM ACTIONS
Reduce room temperature
Setting range: on/off
Stop producing HW
Setting range: on/off
Audio signal in event of alarm
Setting range: on/off
Select how you want the S1155PC to alert you that there
is an alarm in the display here.
The different alternatives are that S1155PC stops produ-
cing hot water and/or reduces the room temperature.
NIBE S1155PC
Caution
If no alarm action is selected, this can result in
higher energy consumption in the event of a
malfunction.
MENU 7.1.8.2 - EMERGENCY MODE
Immersion heater output
Setting range 1X230V: 4 – 7 kW
Setting range 3X400V: 4 – 9 kW
Settings are made in this menu for how the additional
heat will be controlled in emergency mode.
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.
Chapter 9 | Control - Menus 53