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SCW-410-QS (05/12)
Page 27
SATURATION
TEMPERATURE
(°F)
SUCTION
PRESSURE
(psig)
SATURATION
TEMPERATURE
(°F)
SUCTION
PRESSURE
(psig)
-20
26.1
70
199.2
-15
30.8
75
216.1
-10
35.9
80
234.0
-5
41.5
85
253.0
0
47.5
90
273.0
5
54.1
95
294.1
10
61.2
100
316.4
15
68.8
105
339.9
20
77.1
110
364.6
25
86.0
115
390.5
30
95.5
120
417.7
35
105.7
125
446.3
40
116.6
130
476.3
45
128.3
135
507.6
50
140.8
140
540.5
55
154.1
145
574.8
60
168.2
150
610.6
65
183.2
Figure 20. Pressure-Temperature for R-410A
12. To determine the degrees of Superheat, subtract the saturation temperature
determined in step 11 from the suction temperature read at the compressor suction
port thermocouple. The difference in the temperatures is the superheat.
(Superheat, °F) = (Suction Temp., °F) - (Saturation temp., °F)
13. If superheat is less than 10°F,
increase the superheat by adjusting the setting on
the TXV in the clockwise direction.
14. If superheat is greater than 20°F, wait for the ground surrounding the earth loops to
warm up. The TXV valve is factory set at MINIMUM superheat and the TXV cannot be
further adjusted to decrease the superheat until the ground warms up.
15. See Figure 21 and follow the guidelines to bring the superheat into the 10
0
F to 20
0
F
range. When superheat is adjusted to within this range, the system is fully operational
and needs no further adjustment.
16. Check system operation in the HEAT mode, as appropriate. Refrigerant control is
automatic. Do not attempt adjustments to the TXV control in the HEAT mode. If the
refrigerant level is higher than the top sight glass on the ACC, remove refrigerant from
the system until the refrigerant level in the ACC falls below the top sight glass.
Document the
net weight
of the refrigerant charge in the system.
Net weight is
equal to the final refrigerant charge minus refrigerant removed from the system.
Write it down on the
Warranty Registration Card
and inside the compressor unit on
the electrical diagram, for future reference.
This is the full system charge.
Summary of Contents for SCW Series
Page 8: ...SCW 410 QS 05 12 Page 8...
Page 9: ...SCW 410 QS 05 12 Page 9 Figure 5 SCW Connections for R 410A...
Page 10: ...SCW 410 QS 05 12 Page 10 Figure 6 SCW Internal Flow Schematic...
Page 11: ...SCW 410 QS 05 12 Page 11 Figure 7 SCW Piping...
Page 15: ...SCW 410 QS 05 12 Page 15 Figure 10 SCW Electrical Ladder Diagram 230 1 60...
Page 16: ...SCW 410 QS 05 12 Page 16 Figure 11 SCW Electrical Schematic 230 1 60...
Page 17: ...SCW 410 QS 05 12 Page 17 Figure 12 SCW Series 230 3 60 Electrical Ladder Diagram...
Page 18: ...SCW 410 QS 05 12 Page 18 Figure 13 SCW Series 230 3 60 Electrical Schematic...
Page 19: ...SCW 410 QS 05 12 Page 19 Figure 14 Part 1 of 2 SCW Field Wiring Diagram Reference Figure 8...
Page 20: ...SCW 410 QS 05 12 Page 20 Figure 14 Part 2 of 2 SCW Field Wiring Diagram Reference Figure 9...
Page 28: ...SCW 410 QS 05 12 Page 28 Figure 21 Charging and Superheat Adjustment Process...