Nibe F2040 Technical Manual

Conditions when defrosting is stopped by a protective function
Defrosting is not permitted for 15 minutes after the stoppage.
500 pulses
25 rps
Defrosting schedule (F2040)
50 rps (F2040-8), 56 rps ( F2040- 12/16)
2 rps/5 sec permitted
when conditions are
met
500
Completely closed
3 secs
Suction SH -
Target LP
Compressor
stopped
SH check
On
On
On
On
Off
Off
Compres-
sor speed
EEVH
EEVc
Fan
4-way
valve
1 sec.
60 secs
40 secs after defrosting
conditions met
80 secs
90 secs
SH ≤ 5°C
Stop conditions for
defrosting fulfilled
SH check
SC check
Oil return
This function ensures that the oil returns to the com-
pressor.
Cooling operation:
■
The upper limit for compressor speed is changed to
A (rps) when the compressor has worked constantly
for more than 60 min.
■
During compressor operation below B rps for
10 minutes, the minimum speed is increased to Brps.
■
At compressor operation below C rps for 2 hours ac-
cumulated, the speed is increased to C rps for 5
minutes.
D (rps)C (rps)B (rps)A (rps)
564625100F2040
Heating operation:
■
During heating operation, this function is a variant
of defrosting and occurs at 3 hours of accumulated
operation.
■
During heating operation the compressor speed is
D rps instead of B rps.
■
The speed of the compressor is locked at 56 rps.
■
The fan is temperature controlled.
> 24 °C≤ 24 °C< 0 °COutdoor temperat-
ure (Tho-A)
6002000Speed, fan (rps)
The function stops:
■
When overheating is less than 5 K, and more than
50 seconds have passed since the four way valve
shifted.
■
More than 5 minutes have passed since the function
started.
23Chapter 4 | Description of functionsNIBE™ F2040

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)