HVAC: Water Source Heat Pump Not Cooling (McQuay Water Cooled Heat Pump Service Call) AC Not Working
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- čas přidán 10. 09. 2024
- HVAC (Heating, Ventilation, Air Conditioning) HVAC (Heating, Ventilation, Air Conditioning) Water Source Heat Pump Not Cooling/Heating (McQuay Water Cooled Heat Pump Troubleshooting) Heat Pump AC Unit Running On High Pressure/Tripping On High Pressure Control / AC Unit Contactor Replacement / HVAC Emergency Service Call / HVAC Training Video / Water Cooled Heat Pump Troubleshooting Guide / Ac Unit Turning On And Off / AC Not Cooling Properly / Not Heating Properly / Heat Pump Troubleshooting / Heat Pump Wiring / Air Conditioner / Heating And Cooling Videos On CZcams
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A heat pump is a system used to heat or cool an enclosed space or domestic water by transferring thermal energy from a cooler space to a warmer space using the refrigeration cycle, moving heat in the opposite direction in which heat transfer would take place without the application of external power. When used to cool a building, a heat pump works like an air conditioner by transferring heat from inside the building to the outdoors. When used to heat a building, the heat pump operates in reverse: heat is transferred into the building from the outdoors. Common heat pump types are air source heat pumps, ground source heat pumps, water source heat pumps and exhaust air heat pumps. Heat pumps are also often used in district heating systems.
The water source heat pump replaces the outdoor fan and coil with a heat exchanger. For this system to work the building provides a loop of water. This water loop includes a cooling tower and a boiler to maintain the water entering and leaving the unit for optimal performance.
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Jmt man you were at the top of the ladder dangerous thing good troubleshooting
Excellent video bro keep them coming
JMT thanks for another interesting and helpful video. Great job.
Great work 🔥🔥🔥
Well done.
If they do not replace the strainer screen they risk fouling the coaxial coil with sediment, those tube in tube coils are small diameter and it will not take a lot to have them with restricted flow. Nice video.
Props for another great video sir!!!….I also work on a lot of horizontal in the ceiling heat pumps as well as chassis heat pumps but I rarely if ever encounter water regulators…. How do you go about setting the amount of water flow???do you cross reference the units manual performance guide and set it up based on head pressure reference chart numbers or do you use some sort of water metre to determine the GPM to the various size heat pumps and regulate water flow that way
Thank you very much
You can set the head pressure on that regulator with a service wrench. That is based on what refrigerant you are using and the ambient temp in that location. That is adjusting the water. However I have see systems with actual water balance valves, a lot in hospital's. That usually requires special equipment to do. You hook up hoses and set the GPM to the designed flow, however they go out of adjustment all the time depending on the brand used. Also watch out for bad back flow preventers if one is installed. Here is a link to a common one. www.supplyhouse.com/Bell-Gossett-117415LF-CB-3-4-Lead-Free-Circuit-Setter-Balance-Valve-3-4-NPT?msclkid=8a25f74514d016871f7295fc95398bfd
Nice electrical wiring in the background there 😱
The commentary cracks me up. "How do you open that?" Did you get to that issue with the tripped breaker?
Great and useful video
So on water source heat pumps, if your pressures are too high, youd want to check your strainer? I just started dealing with water sourced units, very green
Thank you
Nice video, I had the same problem last week on a similar McQuay with 22. Whats the reason for the condenser water regulating valve. Never seen one on any of the water source heat pumps were I work. Looks like something else to go wrong; that is not need on that type of system. Lol
All water source should have some type of water regulator if not that type they have circuit setters
Really wish more techs would get on board and stop taking these jobs where owners just want to Mickey mouse " units, big liability issue if you work on them...make them sign a release form
I have an issue with my moms unit in her condo. The building keeps saying its her AC unit even though its a newer unit 2.5years old. 1. There is no strainer wye at all so I know the strainer isnt plugged... The unit intermittently stops working fan still runs but no compressor. The LED trouble code says high head pressure as well. Multiple AC techs have checked out her unit and cant find any issue. So I hooked up a fieldpiece temp sensor (st4) on the in and out water lines. When the unit is working the in is 90-92 and the out is usually 8 degrees hotter which is at the upper end I know but last time it stopped working I went over (not sure how long it was off but probably a couple hours) the ambient air in the condo was 78 and both the in and out water lines were reading the same 80ish degrees which is almost ambient air temp. So to me that says there is no water in the lines? The buildings AC guy says no if there was no water the hose would be super hot. I dont understand that if the compressor has been off for hour or more and just the fan running how does that heat up the hoses? He also said a strainer is not needed... Im calling BS on that too. Can you point me in the direction of the next best trouble shooting steps to narrow down if this is a building or AC unit issue. She is getting the run around from all sides and its very frustrating.
I am a subscriber can you explain the Mcquay low temp sensor and can it be replaced with a basic low pressure switch
👍
What (if anything) did the second system do when you tried to start it?
Great vid as always. What’s the name of the outro music by the way?
were you in Mexico.
Wtf is back pressure? Where does one read that? In the back pressure line?
what was the actual problem?
?: Do all compressors make that sound or does it depend on the type of compressor?
You take “being high” at work to a literal sense! 😱 Imagine dropping your phone or tools from there…yowsa