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50
51
52
55
7
9
10
60
5
7
8
65
4
70
Outdoor
75
Dry
80
Bulb
85
Temp.
(F)
90
95
100
105
110
115
Using a digital psychrometer, measure the return air wet-bulb temperature at the unit just before the coil. Also measure the outdoor dry-bulb tem-
perature. Use these temperatures to locate the target superheat on the charging table. Do not attempt to charge the system if these conditions fall
outside of this charging table.
ADD refrigerant to DECREASE total superheat. REMOVE refrigerant to INCREASE total superheat. Always allow 10 to 15 minutes of operature
after any refrigerant or air flow change prior to determining the final superheat.
STEP 9 - Record System Information for refer-
ence.
Record system pressures and temperatures
after charging is complete.
Outdoor model number = _________________
Measured Outdoor Ambient = __________ º F
Measured Indoor Ambient = __________ º F
Measured Liquid Line Temp = __________ º F
14
Fixed Orifice Superheat Charging Table
53
54
55
56
57
58
59
11
12
14
15
17
18
20
9
10
12
13
15
16
18
6
8
10
11
13
14
16
5
7
8
10
11
13
5
6
7
9
4
6
550
INDOOR ENTERING
WET BULB CURVES
500
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
450
400
350
(4)
300
250
200
40
170
INDOOR ENTERING
165
WET BULB CURVES
TOP TO BOTTOM
160
71, 67, 63 AND 59 DEG F.
155
150
145
(5)
140
135
130
125
120
115
110
40
Indoor Wet Bulb Temp (F)
60
61
62
63
64
65
66
21
23
24
26
27
29
30
19
21
22
24
25
27
28
17
18
19
21
22
24
25
14
16
17
18
19
21
22
10
12
14
16
18
19
21
7
9
10
11
12
14
16
4
6
7
9
10
13
14
4
6
8
10
11
4
6
8
6
4
Measured Suction Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Suction Gage Pressure = __________ PSI
PRESSURE CURVE SAMPLE
Cooling @ 1450 SCFM
Heating @ 1350 SCFM
500
INDOOR ENTERING
(2)
DRY BULB CURVES
TOP TO BOTTOM
450
80, 70, AND 60 DEG F.
400
350
(3)
300
250
(1)
200
60
80
100
120
-5
5
15
OUTDOOR TEMPERATURE (Degree F)
140
INDOOR ENTERING
130
DRY BULB CURVES
TOP TO BOTTOM
120
80, 70, AND 60 DEG F.
(2)
110
100
(3)
90
80
70
60
50
40
(1)
30
60
80
100
120
-5
5
15
67
68
69
70
71
72
73
30
31
27
28
27
31
24
25
27
28
30
31
22
24
26
28
29
31
32
18
19
21
23
25
26
28
16
18
20
21
23
24
26
13
14
16
18
20
22
24
10
13
14
16
18
20
22
8
10
12
13
16
18
20
6
7
9
11
13
15
18
4
7
9
11
13
16
6
9
12
14
18-AC51D1-10F-EN
25
35
45
55
65
25
35
45
55
65
74
75
76
77
78
29
31
33
28
29
30
31
32
25
27
28
30
31
23
25
26
28
29
21
23
25
27
29
20
22
24
26
28
18
21
23
26
28
16
19
21
24
26
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