RT-SVF25C-EN
21
Pressure Curve
To Check Operating Pressures
1.
Start the unit and allow the pressures to stabilize.
2. Measure the indoor DB/WB temperature entering the
indoor coil.
3. Measure the outdoor air dry bulb temperature.
4. Take discharge and suction pressure readings.
5. Plot the outdoor dry bulb and the indoor DB/WB
temperature onto the chart.
6. At the point of intersection, read down for the suction
pressure and to the left for the discharge pressure.
Figure 1. T/YSC072F Cooling cycle pressure curve
Dischar
ge P
ressur
e, PSIG
4
