Working with refrigerants After studying this chapter, you will be able to Purge system with nitrogen. Pressurize system for leak detection Describe different.

Slides:



Advertisements
Similar presentations
Heavy-duty Heating, Ventilation, and Air Conditioning Systems
Advertisements

Refrigeration Systems
Coach Air Conditioning
Chapter 4 Air-Conditioning Components
CHARGING BY SUPERHEAT.
General System Maintenance BUS 4 COMPONENT FLOW.PPT
Student CD for Commercial Refrigeration for A/C Technicians
Basic Refrigeration Cycle
Left Side Discharge Pressure Regulator
Refrigeration Flow Control
Tennessee Technology Center Center at Pulaski. Superheat & Sub-cooling A Technician’s Guide to HVACR Diagnostics.
COMMERCIAL REFRIGERATION
Refrigeration Components
HVACR312 - Refrigeration Metering Devices.
Section 5: Commercial Refrigeration
…just got better.
C oncerns Ltd ool Energy Efficient Refrigeration Jane Gartshore, Cool Concerns Ltd.
Vapor-compression refrigeration
Unit 8: Leak Detection, System Evacuation, and System Clean-up
Product Introduction.
Trouble Shooting and Performance Testing
Unit 11: Calibrating Instruments
Air Conditioning EPA Type II.
SYSTEM COMPONENTS CHAPTER 5page 91C & 93 L. OBJECTIVES l IDENTIFY AND COMPARE THE STATE OF REFRIGERANT IN EACH SECTION OF A/C SYSTEM. l EXPLAIN PURPOSE.
CHAPTER 6 Moving Heat: Heating and Air Conditioning Principles
Air-Source Heat Pumps I North Seattle Community College HVAC Program Instructor – Mark T. Weber, M.Ed. Airsource Heat Pump 1.
General Troubleshooting Tips.
The Refrigeration Process
SAFETY, TOOLS & EQUIPMENT, SHOP PRACTICES
Section 1: Theory of Heat
1 A/C Pressure Test and Evacuation. 2 Leak Detection Leak detection must be done after every repair job. It must also be done anytime the appliance can.
Objectives Finish up discussion of cycles Differentiate refrigerants Identify qualities of a good refrigerant Compare compressors Describe expansion valves.
Principles of correct VRV Installation A. Refrigerant pipe work
1 HVACR318 – Refrigeration II Diagrams. 2 Hooking up Gauges on Suction and Discharge Lines.
CCNA1 v3 Module 9 v3 A+ Type 2 JEOPARDY K. Martin.
 automotive - carburetion and controls  biological - pharmaceutical distillation  braking - trains  cathode ray tubes  environmental controls and.
Air Conditioning Charging.
Vapor compression cycle performance. 1- Effect of evaporation pressure “ or temperature” for the following figs: R-22, 4.5% clearance, 50 L/s displacement.
Objectives Empathize with refrigerant Describe refrigeration cycles Analyze cycles on T-s diagrams Compare real cycles to ideal cycles Basis for discussion.
Section 1: Theory of Heat Unit 3: Refrigeration and Refrigerants
Insco Distributing, Inc. R-410A UPDATE SEPTEMBER 15,
Date of download: 6/3/2016 Copyright © ASME. All rights reserved. From: Comparison of the Straight Adiabatic Capillary Tube Expansion Devices Used in Refrigeration.
Vacuum, Charging and Recovery Sugiyanto, S.T., M.Eng.
CHAPTER 6 Basic Refrigeration Systems. CHAPTER 6 Basic Refrigeration Systems.
Chapter 4 Training Package HCFC Phase-out RACSS – UNEP 2014 Servicing of HCFC/HFC Based Air-conditioners.
Unit 11: Calibrating Instruments
Section 2: Safety, Tools and Equipment, and Shop Practices
Automotive Heating And Air Conditioning
. Level 3 Air Conditioning Inspections for Buildings
R1 Fundamentals of Refrigeration
The Step by Step Charging Techniques
The Basic Direct Expansion Refrigeration Cycle
Student CD for Commercial Refrigeration for A/C Technicians Chapter 10 Supermarket Refrigeration.
Vapor-compression refrigeration
R1 Fundamentals of Refrigeration
Science Equipment and measuring
Refrigeration and Air conditioning
Leak Detection All Refrigerant: Soap bubble
R4 Troubleshooting Refrigeration
Small Appliance Recovery Requirements
By: JAGDEEP SANGWAN Refrigeration Basics 101.
Leaky Appliance Trigger Rate
Air Treatment School Refrigerated Dryer Training
Automotive Technology Principles, Diagnosis, and Service
Presentation transcript:

Working with refrigerants After studying this chapter, you will be able to Purge system with nitrogen. Pressurize system for leak detection Describe different methods of leak detection. Explain use of vacuum pumps and evacuation procedures Understand procedures for charging systems with refrigerant. Explain recovery and recycle procedures

INERT GASES NITROGEN (N) and Carbon Dioxide (CO2),meaning they do not support combustion. They are high pressure gases used to purge the system while brazing, or pressurize the system for leak detection

Pressure Regulator

Basic Refrigeration Charging method System charging is adding the proper quantity of refrigerant to refrigeration system so that it operates as intended. Some systems can handle a wider variation of charge size in particular, those with liquid receivers. Direct expansion systems with small condensers and capillary tube expansion devices tend to be very sensitive to refrigerant mass and are said to be Critically charged. In all cases, the system data plate should contain useful information Charging a refrigeration system depends upon: - Type and size of the system - Available equipment - Requiring accuracy

Method of charging 1. Volumetric charging by graduated cylinder 2. Charging by weight 3. Charging by sight glass 4. Charging according to system performance 5. Electronic charging 6. Vapor refrigerant charging 7. Liquid refrigerant charging

Method of charging Charging according to system performance This done by monitoring the suction pressure, discharge pressure, evaporator superheat and liquid subcooling out of the condenser Thermometers are tightly attached to the liquid line and suction line then refrigerant is the gradually added into the system and the pressures and temperatures monitored. As the estimated suction and discharge pressures are approached, and the design subcooling and superheat values are achieved, a suitable charge is achieved. There is a delay between adding refrigerant and the resulting performance being achieved there for these performance should achieved for some time to insure that the reading are more or less constant

Method of charging Electronic charging machines During larger scale manufacturing, equipment tends to be charged using electronically controlled charging machines. These generally measure refrigerant into system using precise mass flow meters, and are generally accurate to ±0.5gr