Thermostat or temperature sensor
Figure 51: Discharge temperature protection examples
Condensing temperature (°C)
Condensing temperature (°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
R410A
Example 1
HP1
HP2
CC-000165
Example 1 (R410A, SH = 11K)
LP switch setting: LP1 = 3.8 bar (g) (-15°C), HP switch setting: HP1 =38 bar (g) (62°C)
Risk of operation beyond the application envelope.
DGT protection required.
Example 2 (R410A, SH = 11K)
LP switch setting: LP2 = 4.7 bar (g) (-10°C), HP switch setting: HP2 = 31 bar (g) (52°C)
No risk of operation beyond the application envelope.
No DGT protection required.
DSH090 to 184 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.
For R410A application the discharge gas protection should be set to open at a maximum discharge gas temperature
of 135°C(275°F). The discharge gas thermostat accessory kit (code 7750009) is recommended.
For R452B/R454B application, 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 xed on the pipe (see Figure 52: Discharge
Gas Temperature protection (DGT))
Figure 52: Discharge Gas Temperature protection (DGT)
© Danfoss | Climate Solutions | 2022.10 AB288965961751en-001402 | 47
Scroll compressors, DSH090 to DSH600 | Application
To Next Page
Loading...
Need help?
General
