3
2
1
4
CC-0056
1
2
3
4
Thermostat
Discharge line
Bracket
Insulation
Figure 49: Discharge temperature protection examples
C
ondensing t
emper
atur
e (°C
)
C
ondensing t
emper
atur
e (°F)
Evaporating temperature (°C)
Evaporating temperature (°F)
5
10
15
20
25
30
35
40
45
50
55
60
65
70
41
50
59
68
77
86
95
104
113
122
131
140
149
158
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
-31
-22
-13
-4
5
14
23
32
41
50
59
68
77
86
Example 2
LP2
DGT - limit
LP1
R32
Example 1
HP1
HP2
CC-000184
Example 1
(R32, SH = 5K)
LP switch setting: LP1 = 3.9 bar (g) (-15°C), HP switch setting: HP1 =40.2 bar (g) (62°C)
Risk of operation beyond the application envelope.
DGT protection required.
Example 2
(R32, SH = 5K)
LP switch setting: LP2 = 4.8 bar (g) (-10°C), HP switch setting: HP2 = 32 bar (g) (52°C)
No risk of operation beyond the application envelope.
No DGT protection required.
DSF090 to DSF200 have no integrated discharge temperature protection, an external protection is required.
This external protection device can be a thermostat or a temperature sensor. The discharge gas temperature
protection must trip the power supply when it reaches the setting point to protect the compressor from
overheating.
The discharge gas protection should be set to open at a maximum discharge gas temperature of 150°C(302°F). A
PT1000 is recommended.
The discharge gas thermostat or sensor must be attached to the discharge line within 150mm (5.91 inch) from the
compressor discharge port and must be thermally insulated and tightly fixed on the pipe (see
Gas Temperature protection (DGT)
Figure 50: Discharge Gas Temperature protection (DGT)
© Danfoss | Climate Solutions | 2023.06
AB309735209512en-000603 | 43
Scroll compressors, DSF090 to DSF530 | Application