Reversing valve - Heat Pump. How it works, Operation.
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Date: 2023-11-17
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Comments and reviews: 30
Carlos
Thank you for the Information & Good quality video about the Reversing Valve Cycle.
It would be much Nicer if you can move the mouse Slowly because Specially for beginners to put attention in what you're saying and try to follow up with the mouse moving to fast It's Really difficult to Focus on it, & also the mouse Color would Nicer if you can change the Arrow to a Black color sense must the time the background it's White.
Thank you again,
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Thank you for the Information & Good quality video about the Reversing Valve Cycle.
It would be much Nicer if you can move the mouse Slowly because Specially for beginners to put attention in what you're saying and try to follow up with the mouse moving to fast It's Really difficult to Focus on it, & also the mouse Color would Nicer if you can change the Arrow to a Black color sense must the time the background it's White.
Thank you again,
reply
Rando_Webb
So the O wire from the out door units control board would run to that cilinoid, and is energized when the T-stat is set to cool. If it is set to cool and the O wire is pulled the unit should switch from cool to heat. And if that doesn't happen the reversing valve has failed. Sorry, if this seems like I'm teaching, I'm actually trying to get the diagnosis process down in my own head so I can figure this out for my costomers.
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So the O wire from the out door units control board would run to that cilinoid, and is energized when the T-stat is set to cool. If it is set to cool and the O wire is pulled the unit should switch from cool to heat. And if that doesn't happen the reversing valve has failed. Sorry, if this seems like I'm teaching, I'm actually trying to get the diagnosis process down in my own head so I can figure this out for my costomers.
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Mark
In relation to the compressor at what height should this component be at?
I ask this because most small systems they are above the level of the compressor, and there is a chiller which this component keeps failing where it's in line with the bottom of the component.
Another question in relation is because it's low in the system would oil not get in and somehow block operations.
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In relation to the compressor at what height should this component be at?
I ask this because most small systems they are above the level of the compressor, and there is a chiller which this component keeps failing where it's in line with the bottom of the component.
Another question in relation is because it's low in the system would oil not get in and somehow block operations.
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Asma
Hi. I i need to selct a reversing valve for y heat pump, what are the key paramezters beside the capacity. I check that the capacity requirement is fulfilled however I have very high velocity in suction line (during heating) and the datasheet specification of 4-way valve does not mention any velocity but the pressure ranges (which also meet the system requirement)
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Hi. I i need to selct a reversing valve for y heat pump, what are the key paramezters beside the capacity. I check that the capacity requirement is fulfilled however I have very high velocity in suction line (during heating) and the datasheet specification of 4-way valve does not mention any velocity but the pressure ranges (which also meet the system requirement)
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Brandyn
Hi, In cooling mode, when the cooling cycle ends and the compressor is turned off, is the reversing valve typically held on (so that it doesn't slide back under the residual pressure) or is it typically disabled (open circuit/power down) along with the compressor? I. e, is the reversing valve solenoid typically on all summer, or just when the compressor is active?
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Hi, In cooling mode, when the cooling cycle ends and the compressor is turned off, is the reversing valve typically held on (so that it doesn't slide back under the residual pressure) or is it typically disabled (open circuit/power down) along with the compressor? I. e, is the reversing valve solenoid typically on all summer, or just when the compressor is active?
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Genci
The videos in general are awesome and for school purpose are good too. The mistake in changing from hot to cool and the slide on the reversing valve doesn't move at all was a little bit confusing but I got understand and I also see some comments below that mentioned that. If you can improve a little bit more would be interesting for all hvac classes ON. Thanks.
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The videos in general are awesome and for school purpose are good too. The mistake in changing from hot to cool and the slide on the reversing valve doesn't move at all was a little bit confusing but I got understand and I also see some comments below that mentioned that. If you can improve a little bit more would be interesting for all hvac classes ON. Thanks.
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Johnjohn
Hi Bryan how r u! I got questions I do get it hot gas come from discharge through capillary to shift reversing valve but where is suction line gas come from? Because I see the flow in video suction gas is not come from common suction line, low gas flow back to common suction! Where low gas come from? Its doesnt look like to from common suction? Thanks
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Hi Bryan how r u! I got questions I do get it hot gas come from discharge through capillary to shift reversing valve but where is suction line gas come from? Because I see the flow in video suction gas is not come from common suction line, low gas flow back to common suction! Where low gas come from? Its doesnt look like to from common suction? Thanks
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John
what happens when a check valve misfunctions? I am having an issue in my home in the heat cycle only where when the unit cycles off, I get an intermittent hydraulic hammering for maybe 5 seconds. Only during heat, and most online sites I am reading point to a faulty check value on the indoor unit. What is going on in this instance?
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what happens when a check valve misfunctions? I am having an issue in my home in the heat cycle only where when the unit cycles off, I get an intermittent hydraulic hammering for maybe 5 seconds. Only during heat, and most online sites I am reading point to a faulty check value on the indoor unit. What is going on in this instance?
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Peter
Hi. Thanks for the great explanation on heat pump. What can we do in case if we use distributors on the evaporator?
How the flow will be reversed correctly as there will be leads connecting the evaporator and expansion valve?
I would like to know the set up for the higher capacity units. Looking forward to your response.
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Hi. Thanks for the great explanation on heat pump. What can we do in case if we use distributors on the evaporator?
How the flow will be reversed correctly as there will be leads connecting the evaporator and expansion valve?
I would like to know the set up for the higher capacity units. Looking forward to your response.
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skyrunner1000
There is a mistaken in the drawing in cooling mode. The black moving part in the reversing valve should be drawn to the left site in stead of being in the right side, what is not so in the drawing. So it is advised to do this, to better understand the drawing. Nevertheless the gasflow side is correctly indicated.
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There is a mistaken in the drawing in cooling mode. The black moving part in the reversing valve should be drawn to the left site in stead of being in the right side, what is not so in the drawing. So it is advised to do this, to better understand the drawing. Nevertheless the gasflow side is correctly indicated.
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Alberto
ts so helpful to learn just the way the reversing valve works. it allows to reverse cycles for both heating and cooling. The way it works the reversing valve it has two insede slide valves that it all depends what your calling for (heat or cooling)its going to close a side of the valve and open the other one closes.
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ts so helpful to learn just the way the reversing valve works. it allows to reverse cycles for both heating and cooling. The way it works the reversing valve it has two insede slide valves that it all depends what your calling for (heat or cooling)its going to close a side of the valve and open the other one closes.
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Eckehardt
So ice makers use this as well. When it goes from building ice, once the desired ice size is met on the evaporator fingers or trays. The reversing valve switches from freezing to heating the evaporator momentarily to drop the ice off the fingers or tray into the bucket or ice catch tray
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So ice makers use this as well. When it goes from building ice, once the desired ice size is met on the evaporator fingers or trays. The reversing valve switches from freezing to heating the evaporator momentarily to drop the ice off the fingers or tray into the bucket or ice catch tray
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mike
This was a great explanation. I've been dealing with a mini split I just installed and the fan on the outdoor unit does not kick on allowing the unit to overheat and shut off. BUT. when I power off the inside unit. It comes on for about three seconds. I can't figure it out
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This was a great explanation. I've been dealing with a mini split I just installed and the fan on the outdoor unit does not kick on allowing the unit to overheat and shut off. BUT. when I power off the inside unit. It comes on for about three seconds. I can't figure it out
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CT
So its really a heat pump whichever direction the refrigerant is flowing? Its just that the condenser and evaporator are swapping their tasks over in the heating mode. An air conditioner and heat pump are two names for one device. A reverse cycle capable air conditioner?
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So its really a heat pump whichever direction the refrigerant is flowing? Its just that the condenser and evaporator are swapping their tasks over in the heating mode. An air conditioner and heat pump are two names for one device. A reverse cycle capable air conditioner?
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Loopyengineeringco
Recently one of these failed in our 6 month old Mitsubishi Ecodan R32 ashp. The whole outdoor unit needs to be replaced, as these valves are brazed into the pipework and can't be repaired easily in situ.
Very interesting video, thanks!
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Recently one of these failed in our 6 month old Mitsubishi Ecodan R32 ashp. The whole outdoor unit needs to be replaced, as these valves are brazed into the pipework and can't be repaired easily in situ.
Very interesting video, thanks!
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Christopher
The problem in a ac with reversing valve when it got old some dirt from burnt oil from compressor clogs the pipe and gives a hard time for it to move and soon without you knowing it will get spoil
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The problem in a ac with reversing valve when it got old some dirt from burnt oil from compressor clogs the pipe and gives a hard time for it to move and soon without you knowing it will get spoil
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Abdelrahman
i think there is a small mistake in the simulation < that in cooling the moving body stay at the same position while it, s should move to the left and allow the refrigernat to go to the condesnser
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i think there is a small mistake in the simulation < that in cooling the moving body stay at the same position while it, s should move to the left and allow the refrigernat to go to the condesnser
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tabrid
hi dear, one mistake in video in cooling mode ( start at 06: 48 )__4 way valve loop for cooling no chang in video from heating to cooling, please repair this mistake because your video very nice easy
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hi dear, one mistake in video in cooling mode ( start at 06: 48 )__4 way valve loop for cooling no chang in video from heating to cooling, please repair this mistake because your video very nice easy
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Imtiaz
Great video. One question. there would be a great heat exchange inside the reversing value as two different temperature fluids are made to pass side by side. ? what do u think?
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Great video. One question. there would be a great heat exchange inside the reversing value as two different temperature fluids are made to pass side by side. ? what do u think?
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Kazimir
Is it correct, I could use the cold of the night for cooling and the heat of the day for heating, with one device (Reversing valve? I'm fairly new into this.
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Is it correct, I could use the cold of the night for cooling and the heat of the day for heating, with one device (Reversing valve? I'm fairly new into this.
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wb
Excellent video. I knew it reversed flow to change from heat and cool but had know idea what made it reverse. Thanks i doubt Ill need it but interesting either way
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Excellent video. I knew it reversed flow to change from heat and cool but had know idea what made it reverse. Thanks i doubt Ill need it but interesting either way
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Jesse
Thank you so much, great help! I'm currently going to school for HVAC and this video helped me understand the Reverse Cycle better.
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Thank you so much, great help! I'm currently going to school for HVAC and this video helped me understand the Reverse Cycle better.
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Balkrish
Sir, this kind of valve, can I use for immediate defrost the cooled plate about -25c. Where can see this inter market? Any sugg
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Sir, this kind of valve, can I use for immediate defrost the cooled plate about -25c. Where can see this inter market? Any sugg
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Vergil
for anyone having to Braze/solder in Reversing valves, the U-bend inside the reversing valve is made of nylon, for the most part
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for anyone having to Braze/solder in Reversing valves, the U-bend inside the reversing valve is made of nylon, for the most part
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domelos3C
The indoor unit freezes during the heating function. Everything is fine in cooling. Is the problem a blocked four-way valve?
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The indoor unit freezes during the heating function. Everything is fine in cooling. Is the problem a blocked four-way valve?
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Keith
I notice the slide inside the reversing valve for cooling didn't move. Now that confused me. The right side should be uncovered
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I notice the slide inside the reversing valve for cooling didn't move. Now that confused me. The right side should be uncovered
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Alen
New valves are bistable, the coil never stays energyzed, power impulse activates it instead. They are not spring loaded.
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New valves are bistable, the coil never stays energyzed, power impulse activates it instead. They are not spring loaded.
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AMAM
Hi please I want to know how can I rectify leaking in the coil of the evaporator in the central AC unit
Best regards
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Hi please I want to know how can I rectify leaking in the coil of the evaporator in the central AC unit
Best regards
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Nicklas
Thank you for this explanation. This will definitely help me understand my Ground Source Heat Pump system design!
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Thank you for this explanation. This will definitely help me understand my Ground Source Heat Pump system design!
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James
What would be the ratio of refrig. to gas coming out of the TXV in the heating mode.
Thanks. great demo.
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What would be the ratio of refrig. to gas coming out of the TXV in the heating mode.
Thanks. great demo.
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