Liquid Line Solenoid on Long Refrigerant Lines
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- เผยแพร่เมื่อ 15 ก.ย. 2024
- Kaleb explains what a liquid line solenoid does and why it can be helpful on long refrigerant lines. A line can be classified as a "long line" based on the line length, though extra considerations may need to be made based on the height difference between the evaporator and condenser.
The Carrier long line set guidelines call for the installation of a liquid line solenoid valve to prevent refrigerant migration during the off cycle. Refrigerant migration may cause refrigerant to condense at the bottom of the compressor, causing a flooded start. Condensed liquid refrigerant in the suction line may also cause flooded starts and damage the compressor. Crankcase heaters and liquid line solenoid valves can help prevent the refrigerant migration that causes premature failure.
Crankcase heaters keep the oil warm in the compressor, which prevents refrigerant from settling in there and condensing. Liquid line solenoid valves shut off refrigerant flow to the evaporator, and it only stops flow in one direction; some heat pump versions are bi-flow. Liquid line solenoid valves can be wired to Y and common in the normally closed position.
However, if you must use a liquid line solenoid on single-stage equipment, you will also likely need to add an OEM hard start kit.
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Excellent video! Now I don't have to wonder what we use solenoid valves for.
Thank you sir for the information.
The hard start kit is not installed because long line sets contain more refrigerant, they are installed because the solenoid will not allow pressures to equalize on the off cycle, and a single phase compressor needs the extra torque provided by the start
Capacitor in order to start under un equalized conditions.
If you have a solenoid then likely you have a low pressure switch which will allow comp to start with pressure in it.
@@kscgaming5857 The solenoids’ purpose on residential long lines, is to contain the refrigerant, so it doesn’t end up in the compressor, causing a flooded start. It is not used for a pump down on each off cycle. That scenario is used on chillers. The solenoid is part of the recommendations that carrier uses for long lines over 50 feet. It is mounted in the liquid line right after the condensing unit, and is wired in parallel with the circuit that energizes the contractor, and closes when the compressor is shut off.
Great video 👏👏👏👏👏👏👏👏🇻🇪
Do you have a video explaining how to troubleshoot faulty solenoids?
Can they cause partial restrictions when going bad? As opposed to not fully open/ fully closed?
very nice...
Thanks bro!
Here in Virginia I say this every once in awhile but I only see it on carrier units, is there a reason for that that , other manufacturers aren't recommending this second question I have . if you're using this solenoid valve should you be using oil traps to I thank you in advance for all you do
oil traps usually if hte outdoor unit is above hte indoor unit if im not mistaken
you shuld attached this document in the description
Thanks for the videos!! I just got a little confused. Part of video 1:50. He says to have the arrow on valve point at the outdoor condenser. It should be pointed in the direction of the refrigerant flow. Towards the Evap. Right? Thanks
I have the same question. Is this because it's a long line , heat pump system?
If it's a heat pump with a piston than it should be pointed towards the flow in heat located close to outdoor unit.
Joe Shearer also confused. I always thought arrow was flow direction of refrigerant therefore pointed in direction of flow towards the indoor unit. Are u telling me I’ve been doing it wrong for 35 years. Lol.
On 1:54 it shows the manual and you can read it says to point the arrow at the indoor coil.
There is no one right answer. Each system is different and if you want to stop flow and reduce chatter than you have to understand how they work and how the system is built and choose the best location and direction.
Seem like the best solenoid location is close as possible to the compressor.
Why
Haha his voice sounds like Chris from HVAC/R videos
Wheres Bert
Kaleb? KALEB?? What happened to the B-man?? Is he on the golf course now these days? Has he levitated to Hugh Hefner's bath robe attire, sifting through a never ending parade of hard body, baby buxom, blue-eyed, blonde bombshells??