Where is the discharge line in a compressor?
Can you put a liquid line dryer in the wrong place?
What is a liquid line solenoid?
A liquid line solenoid is just a valve that opens and closes; it has a magnetic coil. Depending on whether the valve is normally open or normally closed, it opens or closes when the coil is energized. If you work on refrigeration or straight cool units up north, you are likely very well acquainted with “pump down” solenoids.
Does a liquid line solenoid pump down?
In some cases, the liquid line solenoid is not used to “pump down;” it simply closes during the off cycle, preventing refrigerant flow and migration in that way.
Do you know that you pump down a system by closing the liquid line?
Do you know that you pump down a system by closing the liquid line? That's all a pump down solenoid does. It closes when the system is running, causing the system to pump all of the refrigerant into the condenser and receiver (if there is one).
What happens when you transition from liquid to gas?
Remember transitioning from gas -> liquid releases heat; transitioning from liquid -> gas absorbs heat (like when your sweat evaporates on a hot day).
How does liquid refrigerant work?
Explanation :- the liquid refrigerant flows into the expansion device then into the evaporator coil where it then boils and vaporizes and receives heat from the interior air. Afterwards the heated vapor then moves to the compressor and condenser where the heat gets released by the air blowing through it and the refrigerant re-condenses into liquid and the cycle repeats.
Why does my suction line freeze up?
Over charged, or improper adjustment of the metering device causes the suction line to freeze up. Both are bad news for the compressor as well as inefficient cooling of the building. If you see frost on the suction line, the first thing to check is air flow.
Where does compression happen?
Compression happens in the compressor (no pun intended). The metering device is where there is a pressure differential. The pressure change is what causes the state of the refrigerant to start to change. Some of the gas will flash off (depending on how hot the high pressure liquid is coming out of the condenser).
Can a liquid in a suction line damage a compressor?
Any liquid in the suction line could damage the compressor. Look up “Super heat Adjustment”. Because your hand is in the 90’s, the suction line should always feel cool. The liquid line should not be hot or warm for that matter. Your hand is in in the 90’s and the liquid line should be close to the outdoor air temp, ...
Is refrigerant a gas or liquid?
What you wrote is a little off Chuck. The refrigerant is not passing through the evaporator as a gas, it is part gas and part liquid (depending where you measure it). As you stated;
Where are liquid receivers installed?
Liquid receivers are installed in the liquid line as close as possible to the outlet of the condenser. The piping between the condenser and the receiver should be arranged to allow free drainage. The piping should also not cause excessive friction pressure loss or gas binding and must have adequately sized valves and connection fittings.
What is a liquid receiver?
A common accessory used on many refrigeration systems is the liquid receiver. It is basically a storage vessel designed to hold excess refrigerant not in circulation.
Is the refrigerant below the interface subcooled?
And, since the refrigerant’s pressure is constant, the refrigerant below the interface is subcooled.
Auto AC orifice tube locations
Because of the way an orifice tube works, it’s usually located on the inlet to the evaporator coil. However, on some vehicles the orifice tube location varies. Sometimes it is built into the liquid or high pressure line or inserted into the high pressure line right where the line connects to the condenser.
How to replace and orifice tube
Before you replace an orifice tube, LLOT or SLOT, make sure you understand how an orifice tube system works and ensure you’ve done the right testing to conclude the problem is actually caused by the orifice tube. Replacing the orifice tube requires you to completely evacuate the AC system and disconnect the high pressure liquid line.
Use the line disconnect tool to detach the high pressure line from the evaporator
Remove the orifice tube using needle nose pliers or removal tool. Note the orientation of the orifice tube. It must go back in the same way. Lubricate the O-rings on the new orifice tube with AC oil. Insert the new orifice tube into the evaporator or LLOT or SLOT.
Lubrication new O-rings and gaskets with AC oil and install on line
Reconnect the liquid line to the evaporator or condenser and follow factory specs for tightening (if required).
Add AC oil
Measure how much oil came out during the recovery process and replace with the same amount of oil
Evacuate the AC system
Attach the vacuum pump and pull a vacuum on the entire system for at least 30-minutes
Recharge with refrigerant
Using the refrigerant scale, recharge with the EXACT amount of refrigerant. Overcharging by as little as 2-oz can dramatically reduce the performance of your car’s AC system. MORE is NOT better!
Why do we use signs and markers along pipeline routes?
Operators place signs and markers along the pipeline route to identify the general location of a pipeline and specify the type of product transported, the operator’s name and an emergency contact number. Pipeline markers do not identify the exact location of a pipeline and should not be used to locate pipelines prior to excavation.
What is the best phone number to call to check for pipelines?
Remember to always call 811 or your local One-Call center to have pipelines located and marked before digging.
Does the NPMS map the pipeline?
The U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration (PHMSA) provides online maps to help you locate pipelines in or near your community through the National Pipeline Mapping System (NPMS). Maps generated by NPMS show the approximate location of gas and hazardous liquids transmission pipelines in relation to specific addresses, major roads, zip codes, cities and counties. NPMS does NOT include gathering or distribution pipelines. Some states regulatory agencies also provide maps showing the general location of pipelines in their state.
Where is the discharge line in a compressor?
The discharge line is between the compressor and the condenser. The liquid line is between the condenser and the metering device. • Flow nitrogen while brazing and pull a proper vacuum. Both of these practices are more important than whether a drier is inside or outside.
Can you put a liquid line dryer in the wrong place?
It's really easy to put a liquid line drier in the proper location , but it's still more commonly installed in the WRONG location. Namely, people install it right at the condensing unit. (OK, it isn't that big of a deal, but I needed some dramatic emphasis.) Installing it at the indoor coil is good practice for two main reasons:
