Tempstar N4A3 - Superheat Calculation Guide; Superheat Chart Interpretation

INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner
14 421 01 5103 00
Figure 12 Superheat Charging − AC Only
OUTDOOR TEMP (_F)
EVAPORATOR ENTERING AIR TEMPERATURE (_F WB)
50 52 54 56 58 60 62 64 67 68 70 72 74 76
55 9 12 14 17 20 23 26 29 32 35 37 40 42 45
60 7 10 12 15 18 21 24 27 30 33 35 38 40 43
65
—
6 10 13 16 19 21 24 27 30 33 36 38 41
70
— —
7 10 13 16 19 21 24 27 30 33 36 39
75
— — —
6 9 12 15 18 21 24 28 31 34 37
80
— — — —
5 8 12 15 18 21 25 28 31 35
85
— — — — — —
8 11 15 19 22 26 30 33
90
— — — — — —
5 9 13 16 20 24 27 31
95
— — — — — — —
6 10 14 18 22 25 29
100
— — — — — — — —
8 12 15 20 23 27
105
— — — — — — — —
5 9 13 17 22 26
110
— — — — — — — — —
6 11 15 20 25
115
— — — — — — — — — —
8 14 18 23
*Optimum performance point, 95°F (35°C) outdoor ambient and (80°F / 27°C dry bulb), (67°F / 19°C wet bulb) indoor conditions. (DOE A Test Conditions)
Where a dash (--) appears do not attempt to charge system under these conditions or refrigerant slugging may occur. Charge must be weighed in.
Note: Superheat °F is at low-side service port, Allow a tolerance of ± 3°F (± 1.7°C)
Note: Indoor dry bulb between 70°F and 80°F (21°C and 27°C)
Figure 13 Required Suction−Line Temperature
SUPERHEAT TEMP (_F)
SUCTION PRESSURE AT SERVICE PORT (PSIG)
107.8 112.2 116.8 121.2 126 130.8 138.8 140.8 145.8
0 35 37 39 41 43 45 47 49 51
2 37 39 41 43 45 47 49 51 53
4 39 41 43 45 47 49 51 53 55
6 41 43 45 47 49 51 53 55 57
8 43 45 47 49 51 53 55 57 59
10 45 47 49 51 53 55 57 59 61
12 47 49 51 53 55 57 59 61 63
14 49 51 53 55 57 59 61 63 65
16 51 53 55 57 59 61 63 65 67
18 53 55 57 59 61 63 65 67 69
20 55 57 59 61 63 65 67 69 71
22 57 59 61 63 65 67 69 71 73
24 59 61 63 65 67 69 71 73 75
26 61 63 65 67 69 71 73 75 77
28 63 65 67 69 71 73 75 77 79
30 65 67 69 71 73 75 77 79 81
32 67 69 71 73 75 77 79 81 83
34 69 71 73 75 77 79 81 83 85
36 71 73 75 77 79 81 83 85 87
38 73 75 77 79 81 83 85 87 89
40 75 77 79 81 83 85 87 89 91