Danfoss VZH052 Manual page 32

Manage operating envelope
Requirement
Single envelope control
32
AB237586440343en-000601
The operating envelope for VZH scroll
R
compressors is given in the figures below and
guarantees reliable operations of the compressor
for steady-state operation.
VZH operating envelop - R410A(SH5K/9°F)
-40 -31 -22 -13
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
-40 -35 -30 -25
Note:
zone1.1/1.2/1.3: reliable running, compressor discharge temperature will not exceed 135°C (275°F) with suction
superheat within 5K to 30K (9°F to 54°F) range
zone 1.4: Restricted area, compressor discharge temperature may go beyond 135°C (275°F) depending on superheat
and speed. Operation in this area is allowed if discharge temperature is below 135°C (275°F).
Pressure settings
Working range high side
Working range low side
Maximum high pressure safety switch setting*
Minimum low pressure safety switch setting
Minimum low pressure pump-down switch setting
*Maximum allowable pressure on high pressure side according to PED regulation.
Moreover, the discharge gas temperature must
not exceed 135°C (275°F). Steady-state operation
envelope is valid for a suction superheat within
5K to 30K (9°F to 54°F) range.
Evaporating temperature (°F)
-4 5 14 23 32 41
2400-6000rpm
1.4
1800-6600rpm
1.2
1.1
1000-6600rpm
-20 -15 -10 -5 0 5
Evaporating temperature (°C)
bar(g)
psig
bar(g)
psig
bar(g)
psig
bar(g)
psig
1.5 bar below nominal evap. pressure with
bar(g)
psig 22 psi below nominal evap. pressure with
Voltage: 200-240V/380-480V/525-600V
50 59 68 77 86
158
149
140
131
122
113
1.3
104
95
86
77
68
59
50
41
32
10 15 20 25 30
R410A
9.9-41.1
144-596
1.8-16.6
26-241
43.7
634
1.5
22
minimum of 1.8 bar(g)
minimum of 26psig