Thermostatic Expansion Valves - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Unit Start Up
Figure 81. 115 ton high operating pressure curve (all compressors and condenser fans "On")
Note: To check operating pressure, see instructions
Figure 82. 130 ton high operating pressure curve (all compressors and condenser fans "On")

Thermostatic Expansion Valves

The reliability and performance of the refrigeration system is heavily dependent upon proper
expansion valve adjustment. Therefore, the importance of maintaining the proper superheat
cannot be over emphasized. Expansion valves are preset at the factory. In typical applications, field
adjustment should not be required unless the valves are replaced or damaged.
152
COOLING CYCLE PRESSURE CURVE
115 Ton Standard Capacity
COOLING CYCLE PRESSURE CURVE
550
550
500
500
450
450
400
400
350
350
300
300
250
90 100 110
250
90 100 110
COOLING CYCLE PRESSURE CURVE COOLING CYCLE PRESSURE CURVE
130 Ton Standard Capacity 115 Ton Standard Capacity
COOLING CYCLE PRESSURE CURVE
550 550
550
500 500
500
450 450
450
400
400 400
350
350 350
300
300 300
250
90 100 110
250 250
90 90 100 100 110 110
105 Ton High Capacity
120 130 140
Suction Pressure, PSIG
120 130 140 150
Suction Pressure, PSIG
p.
105 Ton High Capacity
120 130 140
Suction Pressure, PSIG
120 120 130 130 140 140 150 150
Suction Pressure, PSIG Suction Pressure, PSIG
105 °F Ambient
105 °F Ambient
95 °F Ambient
95 °F Ambient
85 °F Ambient
85 °F Ambient
75 °F Ambient
75 °F Ambient
65 °F Ambient
65 °F Ambient
150 160 170 180
160 170 180
142.
105 °F Ambient
105 °F Ambient
105 °F Ambient
95 °F Ambient
95 °F Ambient
95 °F Ambient
85 °F Ambient
85 °F Ambient
85 °F Ambient
75 °F Ambient 75 °F Ambient
75 °F Ambient
65 °F Ambient
65 °F Ambient
65 °F Ambient
150 160 170 180
160 160 170 170 180 180
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