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SATURATION
TEMPERATURE
14.
To determine the degrees of Superheat, subtract the saturation temperature from
the suction temperature read at the compressor suction port thermocouple. The
difference in the temperatures is the superheat.
15.
The TXV must be adjusted at installation to be in the superheat range of 10°F to
15°F. To adjust the superheat using a 3/16" square refrigeration service wrench,
turn in the clockwise direction to increase superheat. Turn in the
counterclockwise direction to reduce superheat. One complete turn will change
the superheat by approximately 3°F.
16.
Document the weight of the refrigerant charge in 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.
SD-410-QS (H) (06/15)
SUCTION
PRESSURE
(°F)
(psig)
-20
26.1
-15
30.8
-10
35.9
-5
41.5
0
47.5
5
54.1
10
61.2
15
68.8
20
77.1
25
86.0
30
95.5
35
105.7
40
116.6
45
128.3
50
140.8
55
154.1
60
168.2
65
183.2
Figure 37. Pressure-Temperature for R-410A
(Superheat, °F) = (Suction Temp., °F) - (Saturation temp., °F)
SATURATION
TEMPERATURE
PRESSURE
(°F)
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
SUCTION
(psig)
199.2
216.1
234.0
253.0
273.0
294.1
316.4
339.9
364.6
390.5
417.7
446.3
476.3
507.6
540.5
574.8
610.6
Page 48
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