Nibe AMS10 - Expansion Valves (EEV)

Fan speedSensor temperature Tho-R
Maintains the speedBetween 30 °C and 45 °C
Increase by 10 rpmAbove 45 °C
HEATING MODE
Fan speed (rpm)AMS 10-6
MaxMin
850150
Min fan
speed
(rpm)
Max fan speed (rpm)AMS 10-8
CBATho-A
Tho-R
390710600600a
390850710600b
390850850710c
Tho-R
c
-2
0
1
3
b
a
Tho-A
C
3
9
12
15
B
A
Fan speed (rpm)AMS 10-12/-16
MaxMin
740390
The fan speed is checked every 15 seconds so that the
temperature difference between the outdoor temperat-
ure (Tho-A) and heat exchanger temperature (Tho-R1, -
R2), whichever is the highest, is within a certain range.
Fan speed(Tho-A) - (Tho-R)
Reduction by 10 rpmLess than 3 °C
Maintains the speedBetween 3 °C and 6 °C
Increase by 10 rpmAbove 6 °C
When the outdoor temperature (Tho-A) is greater than
25 °C, the fan speed is checked by the low pressure
(LPT).
Fan speedLPT
Reduction by 10 rpmHigher than 1.1 MPa
Maintains the speedBetween 1.0 and 1.1 MPa
Increase by 10 rpmBelow 1.0 MPa
Expansion valves
(EEV)
Every time the machine is powered up, the expansion
valve will seek its original position. This is clearly heard
with a knocking sound. The expansion valve has 480
pulses from limit position to limit position.
COOLING MODE
EEV-C regulates so that overheating is 5 K.
EEV-H is fully open when the compressor is in operation.
HEATING MODE
EEV-H regulates so that overheating is between 3 and
5 K.
EEV-C regulates so that subcooling is as per the diagram.
Zone A
Z
one B
Ambient temp Tho-A(°C)
15 18
5
18
Temperature dierence between water inlet/outlet
Zone B
Zone A
Target SubCool
T sc (°C)
14
5
Zone B
Zone A
Set point value subcooling
Temperature difference between
incoming and outgoing liquid.
Zone B
Zone A
Outdoor temperature Tho-A (°C)
19Chapter 4 | Description of functionsNIBE AMS10