N And K Versions; Limits Of Application R134A; Limits Of Application R407C - GEA FK50/460 N Assembly Instructions Manual

3| Areas of application

3.4 N and K versions

Models available:
• FKX50/460 N • FKX50/555 N
• FKX50/460 K • FKX50/555 K
• FKX50/830 N • FKX50/980 N
• FKX50/830 K • FKX50/980 K
3.4.1 Limits of application R134a (N and K versions)
Permissible rotation speeds:
N Design: 500 – 3000 rpm (max rotation speed 3500 rpm)
K Design: 500 – 3500 rpm
t (°C)
c
90
82
80
< 20 K
t
?
70 oh
60
R134a
50
40
30
20
-30 -20 -10
Fig. 4
3.4.2 Limits of application R407C (N and K versions)
Permissible rotation speeds:
N Design: 500 – 2600 rpm
K Design: 500 – 3500 rpm
t (°C)
c
61
60
t < 20 K
?
oh
50
R407C
40
30
t + 25 °C
oh
20
-30 -20 -10
-25
Fig. 5
• FKX50/660 N
• FKX50/660 K
t + 25 °C
oh
0 10 20
0 10
Design for other ranges on request
• FKX50/775 N
• FKX50/775 K
operating pressure (g) high-
pressure side (HP): 28 bar
Unrestricted
application range
Reduced suction
gas temperature
Evaporation temperature (°C)
Condensing temperature (°C)
Suction gas superheat (K)
Suction gas temperature (°C)
t (°C)
30
o
operating pressure (g) high-
pressure side (HP): 28 bar
Unrestricted
application range
Reduced suction
gas temperature
Evaporation temperature (°C)
Condensing temperature (°C)
Suction gas superheat (K)
Suction gas temperature (°C)
t (°C)
20
o
Max. permissible
Max. permissible
D
GB
F
I
TR
CN
9