What is VSAT and LSAT?

What is VSAT and LSAT?

VSAT: Vapor Saturation Temperature (from P-T chart) LSAT: Liquid Saturation Temperature (from P-T chart)

What is the formula for subcooling?

Calculate the subcooling as follows: subcooling = CT – T. For a refrigerant blend use the saturated liquid (bubble) temperature as the condensing temperature. Subcooling will not usually occur in the condenser unless liquid backs up in the condenser.

How do I fix high subcooling?

The temperature that you read with the thermometer should be lower than the saturated condensing temperature. The difference between the measured liquid line temperature and the saturated condensing temperature is the liquid subcooling. Add refrigerant to increase subcooling. Recover refrigerant to reduce subcooling.

How do you clean digital manifold gauges?

Drop enough Isopropyl (rubbing) alcohol into the VAC port using an eye dropper or funnel so that it can flush out contaminants. Cap VAC port and gently shake your SMAN460 upside down to clean sensor. Turn right side up. Open a port to pour out the rubbing alcohol and open all ports to allow sensors to dry out.

What does VSAT mean in HVAC?

Saturation. Shows vapor (VSAT) and liquid (LSAT) saturation temperatures calculated from the pressures measured and the refrigerant selected.

What is SLT HVAC?

SLT= Suction Line Temperature. It’s the temperature reading from the larger copper line.

What is a good subcooling?

Subcooling on systems that use a thermostatic expansion valve (TXV) should be approximately 10°F to 18°F. Higher subcooling indicates excess refrigerant backing up in the condenser.

What is normal subcooling for 410A?

Most heating and cooling systems should operate at a superheat of 10F at the evaporator and between 20F to 25F at the compressor. if your HVAC system has a thermostatic expansion valve (TXV), the subcooling should be between 10F and 18F.