SUMMARY This article covers the basics of head pressure controls in chiller systems. RESOLUTION Attached article summary: Condenser capacities are based, in part, on TD (temper-ature difference) between the ambient and the refriger-ant condensing temperature. As the ambient falls, and the TD increases, the condenser capacity will increase.For example, a condenser rated at 150,000 Btu/h […]
Chiller Systems – Flooded Condenser Valves
SUMMARY The attached articles provided detailed information on flooded condenser valves used in Legacy sytems designed for low ambient conditions. These articles provide information on several types of valves available on the market. RESOLUTION The attached articles provided detailed information on flooded condenser valves used in Legacy sytems designed for low ambient conditions. These articles […]
T-P chart pocket size
RESOLUTION The attached Pocket T-P chart provides the temperature / pressure relationships for most common refrigerants. The chart also provides a useful graphic on how to properly measure superheat on any refrigeration system. Superheat measurements are critical in determining the performance of any system. RELATED DOCUMENTS Pocket PT chart
Typical Refrigeration piping diagram
RELATED DOCUMENTS Sporlan diagram # 5-158
TEV Valve Basics
RESOLUTION The attached article includes basic information on TEV valve: 1. Theory of operation 2. Application 3. Valve selection 4. Refrigeration system basics
TEV installation, field service and assembly
RESOLUTION Attached article provides detailed information on TEV: 1. Valve Location 2. Solder Techniques 3. Bulb Location and Installation 4. External Equalizer Connection 5. Driers, Strainers, and Accessories 6. Test Pressures and Dehydration Temperatures 7. Expansion Valve Adjustment 8. How to Determine Superheat Correctly 9. How to Change the Superheat Setting The attached article also […]
Sporlan – Using a T-P chart as a troubleshooting tool
RESOLUTION Manufacturers of refrigerants, controls, and other suppliers distribute hundreds of thousands of pressure-temperature charts to the trade every year. It would be rare indeed to find a service technician who could not put their hands on a pressure-temperature card at a minute’s notice. In spite of the widespread availability and apparent reference to the […]