Start-up and inspection
1. The compressor heater (CH) must have been operational
for at least 6 - 8 hours before the compressor start can
be initiated. This is done by switching on the control
voltage and disconnecting the communication cable.
2. F2050 must be addressed, if it is to have an address
other than 1. See chapter "Addressing via cascade con-
nection".
3. The communication cable on the terminal block AA23-
X4 must not be connected.
4. Turn the isolator switch on.
5. Ensure that the F2050 is connected to the power source.
6. After 6 – 8 hours, connect the communication cable
(W2) to the terminal block AA23-X4.
7. Restart the indoor module. Follow the instructions for
"Start-up and inspection" in the installation manual for
the indoor module.
The heat pump starts 30 minutes after the outdoor unit has
been powered up and the communication cable (W2) has
been connected, if necessary.
If scheduled silent operationis required, it must be scheduled
in the inner section or control unit.
NOTE
Do not start any electrical work until at least two
minutes after cutting the power.
Caution
Silent mode should only be scheduled periodically
because the maximum output is limited to approx.
the nominal values.
F2050-6 , -10
Readjusting, heating medium
side
Air is initially released from the hot water and venting may
be necessary. If bubbling sounds can be heard from the heat
pump, the circulation pump and radiators the entire system
will require further venting. When the system is stable (cor-
rect pressure and all air eliminated) the automatic heating
control system can be set as required.
Adjustment, charge flow
Instructions for adjusting hot water charging are in the In-
staller Manual for the relevant indoor module. See section
Accessories for a list of the indoor units and accessories
that can be connected to F2050.
NIBE F2050Chapter 6 | Commissioning and adjusting32
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