As we discuss in this brief, the administrationâs reports to the court do not preclude the Legislature from assessing the measures identified by the administration and considering its own strategy for compliance with the court ruling based on its priorities.
The two most common causes of low head pressure at an air conditioner or heat pump compressor motor are: 1  Refrigerant under-charge, due to a refrigerant leak or improper charge.  TXV (TEV) malfunction, over-metering refrigerant.
For example, liquid Propane at 100 Â°F has a vapour pressure of 190 psia. This vapour pressure changes with temperature change. In winter when ambient temperature is low, the storage pressure of liquid Propane will be lower. As a further example, LPG (Liquid Petroleum Gas), used for domestic purposes, is stored in small cylinders for ease of carrying. LPG may be pure Butane which has a vapour pressure of 51.6 psia at 100 Â°F.