Danfoss VCH115 Application Manual page 33

Scroll compressors, VCH115 | Application
-40 -31 -22
70
LPS
65
60
55
50
40-140rps
45
40
35
30
25
20
15
10
5
-40 -35 -30
LPS Low pressure safty switch (1 barg)
Discharge temperature protection
Discharge gas temperature protection (DGT) is required if the high and low pressure switch settings do not
protect the compressor against operations beyond its speci c application envelope (example)
-40 -31 -22
75
70
65
60
55
50
45
40
35
30
25
20
15
10
-40 -35 -30
Example 1 (R410A, SH = 6K/10.8°F)
LP switch setting: LP1 = 3.3 bar (g) (-15.5°C/4.1°F)
HP switch setting: HP1 = 38 bar (g) (62°C/143.6°F)
Risk of operation beyond the application envelope.
DGT protection required.
Example 2 (R410A, SH = 6K/10.8°F)
LP switch setting: LP2 = 4.6 bar (g) (-10.5°C/13.1°F)
© Danfoss | Climate Solutions | 2023.08
Evaporating temperature (°F)
-13 -4 5 14
40-120rps
30-140rps
-25 -20 -15 -10
Evaporating temperature (°C)
Evaporating temperature (°F)
-13 -4 5 14
LP1 LP2
-25 -20 -15 -10
Evaporating temperature (°C)
23 32 41 50
40-120rps
-5 0 5 10
23 32 41 50
Example 1
Example 2
Map example R410A
-5 0 5 10
59 68 77 86
158
149
140
131
122
113
104
95
86
77
68
59
Wet injection area
50
41
15 20 25 30
59 68 77 86
167
158
149
HP1
140
131
HP2
122
113
104
95
86
77
68
59
50
15 20 25 30
AB392939083370en-000202 | 33
Danfoss
OE-000004
CC-0045