četvrtak, 20.10.2011.



Hvac Refrigerant

hvac refrigerant

  • any substance used to provide cooling (as in a refrigerator)

  • causing cooling or freezing; "a refrigerant substance such as ice or solid carbon dioxide"

  • Causing cooling or refrigeration

  • (refrigeration) the process of cooling or freezing (e.g., food) for preservative purposes

  • The general industry term encompassing a variety of home comfort equipment, including air conditioners, furnaces, thermostats, filters, ductwork and filters.

  • Heating, Ventilation and Air Conditioning.

  • The term used to refer to the mechanical systems which heat, cool, filter or dehumidify air in a room or building. An example of an alternative HVAC system would be Ground Source Heat. For more information on Ground Source Heat click here.

hvac refrigerant - HVAC Troubleshooting

HVAC Troubleshooting Guide

HVAC Troubleshooting Guide

A Practical, On-the-Job HVAC Guide
Applicable to residential, commercial, and industrial jobs, this essential handbook puts a wealth of real-world information at your fingertips. HVAC Troubleshooting Guide shows you how to read, interpret, and prepare schedules, mechanical plans, and electrical schematics. This handy resource will aid you in your everyday tasks and keep you up to date with the latest facts, figures, and devices. The book includes numerous illustrations, tables, and charts, troubleshooting tips, safety precautions, resource directories, and a glossary of terms.
HVAC Troubleshooting Guide helps you:
Identify and safely use tools and equipment (both new and old)
Use heat pumps and hot air furnaces
Calculate ventilation requirements
Work with refrigeration equipment and the new refrigerants
Utilize control devices, including solenoids and relays
Operate, select, and repair electric motors
Work with condensers, compressors, and evaporators
Monitor the flow of refrigerant with valves, tubing, and filters
Comply with the Section 608 refrigerant recycling rule
Program thermostats
Insulate with batts, sheet, tubing covers, and foam
Work with solid-state controls
Understand electrical and electronic symbols used in schematics

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the other condenser coil on the back side was frozen solid. Not a lot of air was getting through that little space. Took a couple hours with a space heater to thaw. The HVAC guys added some refrigerant and I spent a little time beforehand cleaning out the condensation pump.

The pump was high pressure but was really for overflow as it needed 1.5" of water to fire, and thus the piping to it was full of rusty metal and other gunky goods.

Supposedly it was caused by the low refrigerant. I would have figured a low-pressure cut off switch would have shut down the system but was told because of the two story vertical run to the evaporator unit, all the refrigerant was sitting down on this end. Of course, if the cut off switch was at the evaporator, and the refrigerant was on the low end, it would have shut off, right? *shrug* Will have to make monthly checks from now on.

Red Dot-Evaporator failure analysis

Red Dot-Evaporator failure analysis

Note the round pits developing in the copper tubes of this evaporator (shown as a cross-section). When moisture gets into the refrigerant it turns to hydrofluoric acid, which can attack copper and other metals. In this case, it makes the evaporator less effective at changing liquid refrigerant into a vapor (the process which removes heat energy from the air) and A/C performance suffers.

hvac refrigerant

hvac refrigerant

HVAC Technician Master Tool Kit

Complete Tool Kit for Troubleshooting HVAC Systems Includes Two Meters for Making All Critical Voltage, Current and Temperature Measurements. Includes: * Heavy-Duty Black Canvas Zipper Case # C800 * Autoranging Multimeter with temperature # M2625 * Clamp Meter # ST1010 * 8" Groove Pliers # ST95 * Nut Drivers 3/16",1/4",5/16" # ND3 * Diagonal Pliers # ST26 * Long Nose Pliers # ST34 * #1 philiips screwdriver # ST71 * #2 phillips screwdriver # ST71A * 3/16" slotted screwdriver # ST72 * 1/4" slotted screwdriver # ST72A * AC Line Splitter # ST74 * AC Voltage Detector Probe # ST73 * Pocket Flashlight # ST32 * AC Receptacle Tester # ST38G

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- 05:32 - Komentari (0) - Isprintaj - #

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