Nibe F2040 Technical Manual

■
a) Defrosting can be started when the accumulated
operating time for the compressor has reached 30
minutes, if the previous defrosting is included be-
cause of ”max defrosting time”.
■
b) 5 minutes after compressor start
Conditions during defrosting
■
When the defrosting conditions are met, the outdoor
unit waits 40 seconds to confirm it. If the defrosting
conditions are changed during the 40 secs. Defrosting
will not start.
■
EEV-C opens fully and the compressor speed is set to
A rps.
B rpsA rps
5625Speed F2040
■
Four way valve switches after 20 seconds (F2040 -
12/16) after the compressor speed reaches A rps or
lower.
The fan is stopped when the fourway valve switches.
■
EEV-H is fully open and the compressor speed is fixed
for 1 minute to prevent low pressure.
■
The target speed for the compressor is set to B rps.
The compressor speed is checked every fifth second,
to prevent the water temperature or low pressure
falling.
■
EEV-C regulates to 5 K during overheating.
■
When the overheating is less than 5 K EEV-H controls
to 0.65 MPa at low pressure. When the overheating
exceeds 5 K EEV-H controls to 0.82 MPa at low pres-
sure.
■
The fan is not active during defrosting. Other circum-
stances may make the fan rotate.
From and including version 1.05:
■
If the value in menu 2.1.5 is lower than 65% the
pump runs at 80% during defrosting.
■
If the value in menu 2.1.5 is 65% or higher the pump
runs at 100% during defrosting.
Conditions for stopping defrosting
If any of the following conditions are met, defrosting
stops,
■
8 minutes and 20 seconds after defrosting start.
■
When the evaporation temperature Tho-R1 or -R2
(whichever is lowest) is higher than 12 degrees.
NIBE™ F2040Chapter 4 | Description of functions22

Nibe F2040 Specifications

General

Type	Air/water heat pump
Refrigerant	R410A
Operating Temperature Range Heating	-20°C to 35°C
Operating Temperature Range Cooling	10°C to 46°C
Sound Power Level	56-62 dB(A) (depending on model)