Settings
ELECTRICAL ADDITION - MAXIMUM OUTPUT
The immersion heater can be set to a maximum of 3.5
kW which is the delivery setting.
The immersion heater output is divided into steps, ac-
cording to the table.
Setting maximum output in the electric additional heat
is done in menu 5.1.12.
Power steps of the immersion heater
Max (A)Electrical addition (kW)
1.20.0
3.40.5
5.51.0
7.71.5
9.92.0
12.12.5
14.23.0
16.43.5*
*Default value
The table displays the maximum phase current at each
electrical step for the heat pump (without compressor
operation).
In addition to this, there is the current for compressor
operation, which, depending on the operating conditions,
can amount to approx. 13A.
The heat pump is fused to at least 16 A.
EMERGENCY MODE
When the heat pump is set to emergency mode (SF1
is set to ), only the most necessary functions are ac-
tivated.
• The compressor is off and heating is managed by the
immersion heater.
• Hot water is not produced.
Power in emergency mode
The immersion heater’s output in emergency mode is
set with the dipswitch (S2) on the immersion heater
circuit board (AA1) according to the table below.
654321kW
offoffoffoffoffon0.5
offoffoffonoffoff1.0
offoffoffonoffon1.5
offonoffoffoffoff2.0
offonoffoffoffon2.5
offonoffonoffoff3.0
offonoffonoffon3.5*
*Default value
The image shows the dip-switch (AA1-S2) in the factory
setting.
Emergency mode thermostat
The supply temperature in emergency mode is set using
a thermostat (FQ10-BT30). It can be set to 35°C (pre-
set, e.g. underfloor heating) or 45°C (e.g. radiators).
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31Chapter 5 | Electrical connectionsNIBE F730