Pressure Curves - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Unit Start Up

Pressure Curves

To Check Operating Pressures
1. Start the unit and allow the pressures to stabilize.
Note: If unit includes the Modulating Dehumidification Control option, pressure curves apply to
2. Measure the outdoor air dry bulb temperature (F) entering the condenser coil.
3. Measure the discharge and suction pressure (psig) next to the compressor.
4. Plot the outdoor dry bulb temperature and the operating suction pressure (psig) onto the chart.
5. At the point of intersection, read to the left for the discharge pressure. The measured discharge
Note: To check operating pressure, see instructions
Figure 62. 20 ton standard operating pressure curve (all compressors and condenser fans "On")
142
the cooling mode only.
pressure should be within ± 7 psig of the graph.
COOLING CYCLE PRESSURE CURVE
550
500
450
400
350
300
250
90 100 110 120
p.
105 °F Ambient
95 °F Ambient
85 °F Ambient
75 °F Ambient
65 °F Ambient
130 140 150 160
Suction Pressure, PSIG
142.
170 180
RT-SVX36G-EN