Danfoss DSH Series Application Guide

Figure 9: R452B / R454B - DSH240 to DSH600 ( Max. DGT 150°C)
Condensing temperature (°C)
Evaporating temperature (°C)
Evaporating temperature (°F)
Condensing temperature (°F)
5
10
15
20
25
30
35
40
45
50
55
60
65
70
-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30
-40 -31 -22 -13 -4 5 14 23 32 41 50 59 68 77 86
41
50
59
68
77
86
95
104
113
122
131
140
149
158
S.H. = 30 K (54°F)
S.H. = 5 K (9°F)
CC-000041
 NOTE:
The application envelope of a cross-platform manifold results in the conjunction of map limitations of compressors
composing the tandem.
Pressure settings
Table 13: Pressure settings
Pressure settings
R410A
R452B / R454B
Working range high side
bar(g)
9.9-44.7
9-41.7
psig
144-648
131-605
Working range low side
bar(g)
1.7-15.5
1.7-14.4
psig
25-225
25-209
Maximum high pressure safety switch setting
bar(g)
46.1
43.1
psig
669
625
Minimum low pressure safety switch setting
bar(g)
1.5
1.5
psig
22
22
Minimum low pressure pump-down switch setting
bar(g)
1.5 bar below nominal evap. pressure with minimum of 1.7 bar(g)
psig
22 psi below nominal evap. pressure with minimum of 25 psig
High and low pressure protection
Low-pressure (LP) and high-pressure (HP) safety switches must never be bypassed nor delayed and must stop all
the compressors.
LP switch auto restart must be limited to 5 times within 12 hours.
HP safety switch must be reset manually.
Depending on application operating envelope, you must dene HP and LP limits within operating envelope and
pressure setting table above.
Scroll compressors, DSH090 to DSH600 | Operating envelope data
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Danfoss DSH Series Specifications

General

Brand	Danfoss
Model	DSH Series
Category	Air Compressor
Language	English