wpe1.jpg (1784 bytes) KR Services

Building Sciences
Sick Building Syndrome and Thermal Imaging Expertise
contact: krservices@cox.net

Target Superheat Chart
General Electric Co., 1977

THIS CHART IS FOR FIXED ORIFICE REFRIGERANT CONTROL ONLY,
DO NOT USE IT FOR EXPANSION VALVE SYSTEMS
(Note by KR: This chart works reasonably well with almost every brand out there,
and can also be used when the OEM chart is unavailable)

Read the target system superheat by reading down from the current indoor temperature (Dry Bulb),
and read from the left from the current outdoor temperature.

Degrees F

70

75

80

85

90

95

Indoor Temperature

55

28

-

-

-

-

-

  

60

24

30

-

-

-

-

  

65

20

26

31

-

-

-

  

70

16

23

28

33

-

-

  

75

12

20

26

30

36

-

  

80

8

16

22

28

33

-

  

85

-

13

20

25

31

-

  

90

-

10

17

23

29

-

  

95

-

6

14

20

27

-

  

100

-

-

11

17

24

-

  

105

-

-

8

15

22

29

  

110

-

-

5

12

20

27

  

115

-

-

-

10

18

25

  
         ^              

Outdoor

              

Temperature

              

When conditions are still in the blank cells, you will not be able to get an accurate charge.

 

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