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PRESSURE CURVES FOR  4TWR2036A1000AA

TXC037C4

4TEP3F36A1

4TEP3F36A1

Cooling with FCCV

Cooling with Thermal Expansion Valve

Heating

DI

SCHARG

E PRESSURE (PS

IG

)

OUTDOOR TEMPERATURE (Degree F)

SUCT

IO

N

 PRESSURE (PS

IG

)

OUTDOOR TEMPERATURE (Degree F)

COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F.

TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE.  MEASURE INDOOR WET BULB 
TEMPERATURE, OUTDOOR TEMPERATURE, DISCHARGE AND SUCTION PRESSURES.  ON THE PLOTS LOCATE OUTDOOR TEMPERATURE (1); 
LOCATE INDOOR WET BULB (2);  FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ DISCHARGE OR SUCTION PRESSURE IN LEFT 
COLUMN (4).

EXAMPLE: (1) OUTDOOR TEMP. 82 F. 
                  (2) INDOOR WET BULB 67 F.  
                  (3) AT INTERSECTION

ACTUAL: 

                  (4) DISCHARGE PRESSURE @ 1200 CFM IS 330 PSIG

DISCHARGE PRESSURE SHOULD BE +/- 10 PSI OF CHART

                  (5) SUCTION PRESSURE @ 1200 CFM IS 134 PSIG.

SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART

INTERCONNECTING LINES
GAS - 3/4" O.D.
LIQUID - 3/8" O.D.

DWG.NO. 4TWR2036A1

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

40

60

80

100

120

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

40

60

80

100

120

250

300

350

400

450

500

40

60

80

100

120

250

300

350

400

450

500

40

60

80

100

120

(1)

(1)

(3)

(3)

(5)

(4)

(2)

(2)

INDOOR ENTERING 

WET BULB CURVES

TOP TO BOTTOM 71, 

67, 63 AND 59 DEG F.

INDOOR ENTERING 

WET BULB CURVES

TOP TO BOTTOM 71, 

67, 63 AND 59 DEG F.

INDOOR ENTERING 

WET BULB CURVES

TOP TO BOTTOM 71, 

67, 63 AND 59 DEG F.

INDOOR ENTERING 

WET BULB CURVES

TOP TO BOTTOM 71, 

67, 63 AND 59 DEG F.

30

40

50

60

70

80

90

100

110

120

130

140

-5

5

15 25 35 45 55 65

200

250

300

350

400

450

500

-5

5

15 25 35 45 55 65

INDOOR ENTERING 

DRY BULB CURVES

TOP TO BOTTOM 80, 

70, AND 60 DEG F.

INDOOR ENTERING 

DRY BULB CURVES

TOP TO BOTTOM 80, 

70, AND 60 DEG F.

TU/DDTXH033A4

1200

0

0

0

12

TU/DDTXH041A4

1200

3

5

0

-11

TU/DDTXH033A4

1125

-1

-2

1

21

TU/DDTXH041A4

1140

2

3

0

-5

TU/DDTXH033A4

1130

-1

-2

1

20

TU/DDTXH041A4

1200

3

5

0

-11

TDYTXH033A4

1080

-2

-4

1

26

TDYTXH041A4

1070

0

1

0

2

TDYTXH033A4

1100

-2

-3

1

24

TDYTXH041A4

1100

1

2

0

-1

TDYTXH033A4

1050

-3

-5

1

30

TDYTXH041A4

1050

0

0

0

5

TUYTXH033A4

1070

-2

-4

1

28

TUYTXH041A4

1025

-1

-1

0

8

TUYTXH033A4

1000

-4

-7

1

38

TUYTXH041A4

1025

-1

-1

0

8

TUYTXH033A4

1050

-3

-5

1

30

TUYTXH041A4

1050

0

0

0

5

TVF030A14

1125

0

0

0

3

TVF036A14

1200

3

5

-1

-17

TWE030C14

 949

-9

-14

2

65

TWE036C14

1200

-2

-3

0

15

TWE042C14

1350

3

6

0

-14

TWE048C14

1350

5

9

-1

-29

TXA,TXC030C4,D4

1100

-4

-7

1

45

TXA,TXC031C4,D4

1100

-3

-5

0

14

TXA,TXC035C4,D4

1100

-4

-7

1

45

TXA,TXC036C4,D4

1200

0

0

0

-10

* TXA,TXC037C4

1200

0

0

0

-10

TXA,TXC042C4

1200

1

2

-1

-16

TXA,TXC043C4

1350

3

6

-1

-29

TXA,TXC048C4

1350

5

10

-1

-39

TXA,TXC049C4

1350

5

10

-1

-39

TXA,TXC050C4

1350

5

10

-1

-39

TXH033A4

1125

-1

-2

0

14

TXH041A4

1350

5

9

-1

-29

ALTERNATE INDOOR UNITS

PRESSURE CURVE CORRECTION PSIG

WITH FCCV OR TXV

—COOLING—

—HEATING—

SUCT.

HEAD

SUCT.

HEAD

INDOOR UNIT

CFM

PRESS

PRESS

PRESS

PRESS

ALTERNATE INDOOR UNITS

PRESSURE CURVE CORRECTION PSIG

WITH THERMAL EXPANSION VALVE

—COOLING—

—HEATING—

SUCT.

HEAD

SUCT.

HEAD

INDOOR UNIT

CFM

PRESS

PRESS

PRESS

PRESS

4TEE3F31A

1220

0

0

0

13

4TEE3F37A

1160

0

0

0

4

4TEE3F40A

1200

8

4

-1

-39

4TEP3F30A

940

-5

-3

1

51

* 4TEP3F36A

1200

0

0

0

0

4TEP3F42A

1350

6

3

-1

-29

4TEP3F48A

1350

11

6

-2

-59

RXC031S3

1110

0

0

0

0

RXC036S3

1200

5

3

-1

-28

RXC037S3

1200

5

3

-1

-28

RXC054S3

1350

7

4

-1

-45

TDDRXC031S3

1200

2

1

0

-4

TDDRXC036S3

1200

5

3

-1

-23

TDDRXC031S3

1120

0

0

0

4

TDDRXC036S3

1130

3

2

-1

-16

TDDRXC037S3

1180

4

2

-1

-21

TDYRXC031S3

1090

0

0

0

8

TDYRXC036S3

1085

3

1

0

-12

TDYRXC031S3

1050

-1

-1

0

13

TDYRXC036S3

1050

2

1

0

-8

TDYRXC037S3

1050

2

1

0

-8

TUDRXC031S3

1200

2

1

0

-4

TUDRXC036S3

1200

5

3

-1

-23

TUDRXC031S3

1200

2

1

0

-4

TUDRXC036S3

1200

5

3

-1

-23

TUDRXC037S3

1200

5

3

-1

-23

TUYRXC031S3

1050

-1

-1

0

13

TUYRXC036S3

1050

2

1

0

-8

TUYRXC031S3

1040

-1

-1

0

14

TUYRXC036S3

1040

2

1

0

-7

TUYRXC037S3

1060

2

1

0

-9

* BASE INDOOR UNIT(S) CURVES ON 4TWR2036A1

NOTES:

1

For a field installed TXV kit, apply the factor listed with the FCCV model to the TXV curve.

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