Refrigerant Charging of a High Velocity Space Pak Unit!
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- Опубликовано: 9 фев 2025
- Refrigerant Charging: How does Checking the Charge Differ when using a High-Velocity Space Pak Unit! This is about Checking the Refrigerant Charge on a High-Velocity Ducted System such as Space Pak or Unico. This was a service call on a Space Pak system that was low on refrigerant. I explain how the heat exchange occurs at the indoor air handler with the evaporator coil being smaller. I explain the process of checking the refrigerant charge at the outdoor unit. I discuss the refrigerant heat exchange at the outdoor unit compared to conventional low-velocity split systems that most businesses and homes have. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
Tools Used In This Video
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Fieldpiece ST4 Dual Temp Meter - amzn.to/2wc1ME3
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very good video, straight to the point!
Thank you!
very nice video!!!!
Thanks for the Comment!
My cousin has a high velocity system but it’s not a space pal and it has hydronic heating, he has a 1.5t r22 condenser and coil it was low so I charged it, no TXV, it’s about 32 degrees on the low side and about 180psig on the high side but it’s just not cooling it runs all day long and doesn’t bring the temp down,especially on the main floor. Air filters clean and so are both coils, any suggestions?
Today was my first time running into these units. They are having problems with air flow. I'm not really sure if they've had a problem for a while now or if it just started.
The older ones were psc motors, now they are ecm. If it is older one, it may be a duct restriction, thanks
does the unit have a heat pump???? or electric heater???? thank's...
Normally you would install a boiler or some other heat source as the air is moving to fast to feel comfortable in the winter time to use a heat pump. Thanks for the comment!
whats the velocity in them, i seen some with ductboard ducts
Roughly 2000ft/second, 5 to 6 times the pressure, (7or 8) 2" outlets per ton or 12,000 btu of cooling, but only 250 cfm per ton. They usually have a 6 row evap for more heat absorption. Hope that helps! Thanks for the Comment!
How much should the owner make from an employee? How much weekly profit should the owner make from the employee after all expenses are takin care of such as materials, gas, employee pay and benefits?
Can you explain why you do not fix the leak in the first place? I saw at least 3 pounds going in.
It's great for the business but not so much for the owner. And it is not good for the environment...
No I did not put three pounds in this unit. It was in ounces, sorry for the confusion.
Three pounds would be more than half of the full unit charge. If that amount leaked out and someone put that much back in, it would leak out again and likely pretty fast. You may even get a call from the homeowner or building manager within a day or two that the system is not working. Thanks for your comment
+acservicetech Right, but you still added 8 Oz of refrigerant so the system is leaking somehow, don't you think?
What I don't know is if someone had disconnected hoses and leaked part of the charge out the last time it was serviced. All I can do is tell the customer it was low, look for oil residue, squirt all visible joints with bubble leak detector, and take the sniffer around. I can not charge the homeowner for hours more of diagnosis. I will tell you that the homeowner said it hasn't run right for years and this was a new client that hasn't had it serviced for four years. Did the refrigerant leak over time over the last few years, because it could still work within parameters maybe with 3 or 4 ounces less depending on where it was charged to initially. She is now on the maintenance list for me to check them at the beginning of next summer, not on a maintenance agreement. I will see if it is at correct charge then. I also checked to make sure the schrader valves reseated with leak detector which I then blew out. Only with certain clients will I video at all and then only a little bit most of the time anyway. I happened to know this person already so it was ok. It is not my intent to ever just throw refrigerant in units that are leaking and hope for the best. I hope you understand this and some of my videos I have purposely recovered refrigerant out of units in order to show charging methods to my students at school and for those that are trying to learn. Thanks
Ok, thanks for clearing that up.
What about 410a