Nibe F2120-12, Installer Manual

Page: 31 / 68

Preparations
■
Check that the pipe system is prepared.
■
Check the pipe system for leaks.
■
Check that the electrical installation is prepared.
■
Check that the electrical supply is connected so that
the compressor can be warmed up.
■
The compressor heater (EB10) must have been active
for at least 3 hours before compressor operation can
be initiated. This is done by connecting control
voltage. F2120 permits compressor start after the
compressor has been warmed up. This can take up
to 3 hours.
Filling and venting the heating
medium system
1. Fill the heating medium system to the necessary
pressure.
2. Vent the system using the venting nipple on the
flex hose (enclosed) and possibly the circulation
pump.
LEK
QM20
Start-up and inspection
1. Communication cable, terminal block (X22:1-4)
must be connected.
2. If cooling operation with F2120 is wanted, DIP
switch S1 position 4 must be changed according
to the description below on page 25.
3. Turn the isolator switch on.
4. Ensure that the F2120 is connected to the power
source.
5. Check that fuse (FC1) is on.
6. Reinstall the removed panels and cover.
7. After the power to F2120 has been switched on
and there is a compressor demand from the indoor
module/control module, the compressor starts
once it has warmed up, after max 180 minutes. The
length of this time delay depends on whether the
compressor has been warmed up previously. See
chapter Preparations on page 31.
8. Adjust the charge flow according to size. Also see
section "Adjustment, charge flow” on page 32.
9. Adjust menu settings via the indoor module/con-
trol module as necessary.
10. Fill in the commissioning report in the user manual.
11. Remove the protective film from the cover on
F2120.
NOTE
The external control must be taken into con-
sideration when connecting.
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 radiat-
ors the entire system will require further venting. When
the system is stable (correct pressure and all air elimin-
ated) the automatic heating control system can be set
as required.
31 Chapter 6 | Commissioning and adjusting NIBE™ F2120
6 Commissioning and adjusting