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Thanks, great video, got my first VRV install next week and what lead me to this video was that the manufacturer had said install the REFNET's vertically or horizontally and I understood that as the branches could be horizontally or vertically (but with the REFNET in a horizontal plane) and thinking about that it didn't make sense. This video confirms what I was thinking. Appreciate it.
Thank you for sharing, much helpful. Is there a cheat sheet that you can provide that shows all the temp ranges you mentioned?, or will the ranges change depending on the type of systems?
Great informational video. I hope you can help me. I have 14 seer evaporator coil and 15 seer Carrier condenser (no matching system .I know that) There was original piston (0.088) in the unit ,but after the Carrier condenser was install, piston was replaced by TXV. Unfortunately ,randomly compressor is overheating , so I planning to put the piston back . And new piston is 0.090. What's your take on that?
You explained this so succinctly. I work maintenance on a facility with 40+ WSHPs in the ceiling, over half of which are tripping out on high condenser water temps. This is about to be my next weeks' worth of work. Thank you for making this video!
This is a great video, newly promoted HVAC tech, worked as welder fabricator/ industrial maintenance mechanic. Boss said wanna be the new HVAC tech?…. Lol 😂… only this year installed my first system on the wife’s car successfully… guess I’m qualified. Currently studying for the EPA 608 exam. Thanks guys very helpful.
If there is no piston installed at all, there is no expansion device and thus no refrigeration will occur. Inhave never seen a system with no piston installed. The indoor unit will usually already have something installed.
But how do you get power to it? I installed one in my garage and it plugged into my wall. My new one is also 115v but I don't see where to wire the power up {or where to hook the power cord to the head unit}.
I think you have the numbering wrong on the last section(22:12). T7 and T4 should not be wired together in this configuration. It should be T7&T6 then T8&T4, then T9&T5. Otherwise you are swapping your coils around. Just like how you have it in the beginning of the video for 2M. In other words in the end through the contactor T1&T7&T6&T12 should be connected to L1. Then T2&T8&T4&T110 should be connected to L2. T3&T9&T5&T111 should be connected to L3 for a full hard start.
So my 4 ton package unit has the piston. It’s running my shop. I bought it used. I’m getting a 15-20 delta T but pressures are 155/470. Ambient is 95 and wet bulb about 77 using wet rag and prob. Suction temp is 80. So I think target is 30 and actual super heat is 30. Im I good or missing something. Suction stops sweating around noon.
Most of the manufacturers are recommending to grease the motor, while it is running, thus allowing the grease to properly distribute. Grease amount on the standstill motor is usually smaller. What would you do if the grease is not coming out from the outlet port? I've seen many times motors greased from the box as per maker recommendations and the grease simply didn't come out at all. During the time grease in the bearing is compacted so much, that you have no chance to push it out at all.
Hi there we have 6 of them units on a building an we have nothing but trouble almost every unit have blown compressors and can not find a solution any ideal
Seems like every video like this glosses over the most important point of figuring when to add/subtract refrigerant in a few seconds, and then takes a minute talking about cleaning the filter.
Good video, there are a few drawbacks to the H10- just remember to stay away from wet coils, as the air pump will suck moisture into the heated diode and cause problems, making you have to pull the sensor out and dry it out with nitrogen. Another issue is the sensors tend to wear out and need replacing after a lot of use. The little leak calibration bottle will leak out and evaporate quickly in warm climates. I use infrared leak detectors nowadays as you don't need to worry about moisture and the sensors last a very long time. I have over 40 years of experience in the trade and started out using the H 10 and many techs do agree that its a great unit.
Because I have a wired remote controlled and always turn of at 4 ° difference from the setting that I have it if you can help me out I would really appreciate it thank you
