HIGH SUPERHEAT

1.7 Excessive load on the evaporator (above design)

Probable Cause:

•    A TEV is restricted to the amount of flow it can pass, by the size of its orifice. Therefore, if the load increases above the design limits, high superheat will result.

Remedy

•    Use a balance-ported TEV sized for the maximum load conditions. These valves can modulate down to 20% of their normal rating.

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