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For Air Systems:
In Figure 30, locate the evaporating temperature on the horizontal axis. The
corresponding condensing temperature reading should fall between the upper and lower
parallel lines in Figure 30.
The temperature profile in Figure 30 is valid for the air handler systems with an air
flow of 400CFM per Ton. If condensing temperature is above acceptable range, the air
flow is low. If condensing temperature is below the acceptable range, air flow is too high.
Adjust air flow as appropriate.
For Hydronic Systems:
In Figure 31, locate the evaporating temperature on the horizontal axis. The
corresponding condensing temperature reading should fall between the upper and lower
parallel lines in Figure 31.
The temperature profile in Figure 31 is valid for hydronic systems with the correct
heat exchanger water flow. If condensing temperature is above acceptable range, the
water flow is low. If condensing temperature is below the acceptable range, water flow is
too high. Adjust water flow as appropriate.
SD-410-QS (H) (06/15)
Figure 30. Air System Performance Parameters
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