Nibe S1155 Installer Manual page 25

S1155 External
AA2-X29 AA2-X28
AUX3 5
AUX4 6
7
AUX5
AUX6 8
AUX7 9
GND
AUX8 10
The example above uses the inputs AUX1 (AA2-X28:3) and AUX2
(AA2-X28:4).
A selectable output is AA2-X27.
For certain functions, accessories may be required.
TIP
Some of the following functions can also be
activated and scheduled via menu settings.
Possible selection for AUX inputs
Temperature sensor
Temperature sensor can be connected to S1155. Use
a 2-core cable of at least 0.5 mm² cable area.
Available options are:
• hot water top (BT7) (shows the water temperature at
the top of the tank. The temperature sensor is placed
in the submerged tube on the water heater.)
• Boiler (BT52) (only shown if shunt-controlled additional
heat is selected in menu 7.2.1)
• cooling/heating (BT74), determines when it is time to
switch between cooling and heating mode (only
shown if cooling accessory is selected in menu 7.2.1).
Monitor
Available options are:
• alarm from external units. The alarm is connected to
the control, which means that the malfunction is
presented as an information message in the display.
Potential-free signal of type NO or NC.
External activation of functions
An external switch function can be connected to S1155
to activate various functions. The function is activated
during the time the switch is closed.
Possible functions that can be activated:
• forced control of brine pump
• hot water demand mode "more hot water"
• hot water demand mode "small"
• "External adjustment"
When the switch is closed, the temperature is
changed in °C (if a room sensor is connected and ac-
tivated). If a room sensor is not connected or not ac-
tivated, the desired change of "Temperature" (heating
NIBE S1155
curve offset) is set with the number of steps selected.
The value is adjustable between -10 and +10. External
adjustment of climate systems 2 to 8 requires ac-
cessories.
– climate system 1 to 8
The value for the change is set in menu 1.30.3,
"External adjustment".
• activation of one of four fan speeds.
(Can be selected if ventilation accessory is activated.)
The following five options are available:
– 1-4 is normally open (NO)
– 1 is normally closed (NC)
The fan speed is activated during the time the switch
is closed. Normal speed is resumed when the switch
is opened again.
• SG ready
Caution
This function can only be used in mains net-
works that support the "SG Ready" standard.
"SG Ready" requires two AUX inputs.
In cases where this function is wanted, it must be
connected to terminal block X28 on the PCB (AA2).
"SG Ready" is a smart form of tariff control, through
which your electricity supplier can affect the indoor,
hot water and/or pool temperatures (if applicable) or
simply block the additional heat and/or compressor in
the heat pump at certain times of the day (can be se-
lected in menu 4.2.3 after the function is activated).
Activate the function by connecting potential-free
switch functions to two inputs selected in menu 7.4
(SG Ready A and SG Ready B).
Closed or open switch means one of the following:
–
Blocking (A: Closed, B: Open)
"SG Ready" is active. The compressor in S1155 and
additional heat are blocked in the same way as
today's tariff blocking.
–
Normal mode (A: Open, B: Open)
"SG Ready" is not active. No effect on the system.
–
Low price mode (A: Open, B: Closed)
"SG Ready" is active. The system focuses on costs
savings and can for example exploit a low tariff from
the electricity supplier or over-capacity from any own
power source (effect on the system can be adjusted
in the menu 4.2.3).
–
Overcapacity mode (A: Closed, B: Closed)
"SG Ready" is active. The system is permitted to run
at full capacity at over capacity (very low price) with
the electricity supplier (effect on the system is set-
table in menu 4.2.3).
Chapter 5 | Electrical connections 25