Reading Refrigerant Gauges, Pressure/Temperature Relationship, What Refrigerant is in the Tank!
Summary
TLDRThis instructional video teaches viewers how to identify refrigerants in a recovery bottle without relying on labels or rating plates. It explains using a temperature multimeter and pressure-temperature charts to determine if the refrigerant is R410A (pink bottle, around 71 degrees Fahrenheit at 205 PSIG) or R22 (green bottle, around 72 degrees Fahrenheit at 127 PSIG). The video emphasizes the importance of not mixing refrigerants and provides practical tips for accurate readings, including adjusting for elevation changes.
Takeaways
- 🔍 Identifying Refrigerants: The video explains how to determine the type of refrigerant in a bottle or recovery tank by checking the color code and using a pressure-temperature chart.
- 🔑 Recovery Bottle Color Codes: A gray and yellow recovery bottle indicates one type of refrigerant, while a pink bottle signifies R-410A, and a green bottle signifies R-22.
- 🌡️ Temperature Measurement: Using a temperature multimeter with a probe, the video demonstrates how to read the temperature of the refrigerant for identification purposes.
- 📈 Pressure-Temperature Correlation: The script emphasizes the importance of matching the measured pressure and temperature to a chart to identify the refrigerant accurately.
- 📊 R-410A Identification: For R-410A, a constant temperature of 70.7 degrees Fahrenheit corresponds to a pressure of 205 psi, indicating the presence of this refrigerant.
- 📊 R-22 Identification: R-22 is identified by a saturated state with a pressure of 127 psi at around 72 degrees Fahrenheit.
- 💡 Checking Compressor Rating Plates: The video suggests checking the rating plates on the compressor and the condenser for refrigerant information, even if the rating plate is worn off.
- ❗️ Avoid Mixing Refrigerants: A strong caution against mixing different refrigerants in the recovery cylinder is highlighted, as it can be detrimental.
- 🔄 Refrigerant Expansion: The importance of allowing the refrigerant to sit and the gases to expand to ensure accurate pressure readings is mentioned.
- 🛠️ Equipment Calibration: The video touches on the need for calibrating pressure gauges and multimeters for accurate readings, especially when there's a change in elevation.
- 🔬 Practical Application: The script provides a practical guide on using the information from the pressure-temperature chart and the physical properties of refrigerants to identify them in a recovery bottle or system.
Q & A
What is the purpose of the video?
-The video is a tutorial on how to identify the type of refrigerant in a recovery bottle by using a temperature and pressure chart.
What are the colors of the recovery bottles mentioned in the video?
-The recovery bottles mentioned are gray and yellow.
How can you determine the refrigerant type without a rating plate?
-You can determine the refrigerant type by checking the pressure and temperature readings on a multimeter and comparing them to a pressure-temperature chart.
What is the significance of a constant temperature reading in identifying refrigerants?
-A constant temperature reading, combined with the pressure reading, helps to correlate with the specific refrigerant's properties and identify it accurately.
What is the refrigerant type associated with a pink bottle in the video?
-The pink bottle contains R410A refrigerant.
What is the refrigerant type associated with a green bottle in the video?
-The green bottle contains R22 refrigerant.
What is the approximate pressure and temperature for R410A at a saturated state?
-For R410A, the approximate pressure at a saturated state is 205 psi, and the corresponding temperature is around 71 degrees Fahrenheit.
What is the approximate pressure and temperature for R22 at a saturated state?
-For R22, the approximate pressure at a saturated state is 127 psi, and the corresponding temperature is around 72 degrees Fahrenheit.
Why is it important not to mix different refrigerants in a recovery tank?
-Mixing different refrigerants can lead to chemical reactions that are harmful to the system and can cause damage or inefficiency.
What should you consider when using a multimeter for refrigerant identification?
-When using a multimeter, consider the potential for errors in the multimeter or gauge set, and ensure that the readings are adjusted for sea level or the current elevation.
How can you ensure accurate readings when identifying refrigerants?
-Ensure the refrigerant has been at a constant temperature for at least an hour, and the system has had time to equalize pressures on both sides if it's a package unit.
Outlines
🔬 Identifying Refrigerants in Recovery Bottles
This paragraph explains how to identify the type of refrigerant in a recovery bottle by observing its color and using a temperature multimeter with a probe. It describes the process of checking the temperature and pressure readings to determine if the refrigerant is R410A (pink bottle) or R22 (green bottle). The importance of not mixing refrigerants and ensuring the recovery cylinder contains only one type is emphasized. The correlation between pressure and temperature for R410A at 71 degrees Fahrenheit and 205 psi is highlighted, as well as the saturated state of R22 at 127 psi and approximately 72 degrees Fahrenheit.
Mindmap
Keywords
💡Refrigerant
💡Recovery Bottle
💡Temperature Multimeter
💡Pressure Temperature Chart
💡R-410A
💡R-22
💡Constant Temperature
💡PSI
💡Saturated State
💡Elevation Adjustment
💡AC Service
Highlights
The video demonstrates how to identify the refrigerant in a recovery bottle without relying on labels.
Recovery bottles are typically gray and yellow and can be used to determine the refrigerant type.
A unit's temperature can be read externally if it hasn't been running for an hour, aiding in refrigerant identification.
Refrigerant type should be indicated on the compressor and condenser rating plates.
A pink bottle contains R410A refrigerant, while a green bottle contains R22.
A temperature multimeter with a probe is used to measure the temperature of the refrigerant.
R410A refrigerant shows a constant temperature of 71 degrees at 205 psi.
Pressure-temperature charts are essential for correlating refrigerant properties.
Mixing refrigerants should be avoided as it can cause serious issues.
Constant room temperature and refrigerant bottle temperature can help determine the refrigerant type.
R22 operates at a different saturated pressure compared to R410A.
The saturated state of a refrigerant is a mix of liquid and vapor exerting constant pressure.
Pressure readings should be taken after the refrigerant has had time to stabilize.
A multimeter and gauge set may need adjustment for accurate pressure readings.
Elevation changes require adjustments to pressure gauges for accurate readings.
Pressure differences between R410A and R22 can help identify the refrigerant in a system.
The video concludes with a reminder of the importance of correctly identifying refrigerants for HVAC systems.
Transcripts
all right this video is how to tell what
refrigerant is in a bottle in a recovery
bottle recovery bottle is gray and
yellow also if you have a unit that's
all located in one specific temperature
like a package unit that's all outside
and you read the temperature outside
if the unit hasn't been running in an
hour so you can actually tell what
refrigerants in it even if the rating
plate is wore off and you can't see what
refrigerated is also on your compressor
also it should say the refrigerant at
the rating plate on the outside of the
condenser is more off or heat pump you
can also look on your compressor rating
plate okay so we have a pink bottle here
it's 4:10 eye and we have a green bottle
and that's r22 so we have a temperature
multimeter with a temp probe okay right
here and what we're reading for 410 I
add a constant temperature of 70 point 7
so we'll just call that 71 71 degrees
okay we're reading 205 psi or so okay so
for tonight off you check your pressure
temperature chart at 205 should be
roughly 71 or 71 point 5 degrees so the
pressure temperature correlation of 410
a tells you that there's four today in
this bottle now obviously there is
because it's a pink bottle okay but if
we had this gauge attached to our
recovery cylinder as long as we didn't
pull any air or nitrogen or something
like that into our recovery tank then we
can check to see what refrigerants in
the recovery tank if maybe you you wrote
on the recovery tank and just
temporarily until you filled it up to
pressure but uh and somehow that got
we're off or something you can tell
refrigerants inside the recovery tank is
you do not want to mix the refrigerants
that would be really bad all right you
want to keep all one frigid inside the
recovery cylinder so once again if I
know is a constant temperature in this
room of 71 degrees and this refrigerant
bottles been
here for you know several hours I know
the refrigerants at a constant
temperature of 71 degrees and if I check
the two hot 205 psi and I check my
pressure temperature chart it'll tell me
what temperature is actually the
refrigerant actually is and that would
be roughly 71 degrees now we come over
to r22 it's completely different
pressure at is that it's saturated state
where you have liquid in the bottom of
the bottle and then you have vapor in
the top part of the bottle
alright so saturated state both exist
liquid and vapor at the same time the
vapor is what's exerting the pressure
alright and it's going to be a constant
pressure regardless of how much how many
pounds of refrigerant inside the
recovery bottle as long as it's had a
chance to sit and the the gases have
expanded if you pulled refer journey out
so I know they had a chance to expand
it's been sitting there for a couple
hours or you know at least an hour I
would take it out of a hot pan or
something like that and put it into a
cold shop and expect this to work but if
the refrigerants been in the same
location for a couple hours at least one
hour then you can kind of tell what
refrigerants inside the bottle all right
so what 125 psi have about 128 psi will
go with this on the green on the green
gauge all right on the saturated
temperature that it says it says that
127 psi g4 r22 should be roughly right
over 72 degrees okay
so there's going to be some error all
right in the multimeter maybe in the
gauge set maybe it needs a little bit of
an adjustment okay because they're they
should be adjusted normally they come
adjusted for sea level so it should be
roughly right on the zero okay when you
get them if you change elevations you
have to adjust that you cover off and
adjust that screw so that the needle is
at zero and there's no pressure on but
basically you can tell what system would
have for 10a in it and which system has
r22 in it just because of the pressure
difference 207 psi G versus 127 PSIG if
the systems been off
it's a package unit systems been off for
an hour
and it's had a chance to equalize both
sides at the same pressure then you can
tell what refrigerants in it just by the
pressure at the corresponding
temperature we've got same thing with a
recovery bottle and obviously we know
what refrigerants already in it because
pink will rose at 4:10 night and late
Green that is our 22 all right well I
hope you enjoyed yourself and see us
next time at AC service pipe
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