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Best commercial hvac channel on youtube

@HVACTIME

3 жыл бұрын

Thank you

Thank you for helping me understand chillers.

Best chiller channel ever

@HVACTIME

3 жыл бұрын

Thank you

Im from the UK and I don't see thses very often so thankyou for the video.

I really like that u r trying to get young guys interested in large tonnage machines. Im the youngest chiller mechanic that we have and im 40. Our vets are retiring this year

@arc3075

2 жыл бұрын

It takes several years of hands on experience to effectively PM a LTC. As for service and troubleshooting that will require even longer period under the watchful eye a qualified technician.

can i just say thank you I just got the building engineer position and I came from hvac background and I have enough knowledge to be able to get by but I never got to diagnosing the big boy stuff. I hate when I look up explanations and its a video of a tonka truck dropping off and picking up hot/cold water its like dude i want to know exactly what's going on in that tank so i can understand!!!

Liking your videos btw,wish we had this 30 yrs ago.

Excellent description of approach. When I was an apprentice, a journeyman tried to tell me the delta T between incoming and leaving water was the approach. I spent a couple years believing that, lol!

@kasimshaikh3750

Жыл бұрын

That happens a lot more than it should.

@MR-backup

7 ай бұрын

I am having Chief, Assistant Chief's, and Leads tell me it's called "being inverted".

Fantastic explanation as usual. Keep up the great work!

Excellent info! Great video! Thank you!

Great video once again!

Nice video. Great knowledge. Thanks for sharing

Great video and commentary on the reasons we pay attention to approach. Particularly found useful your commentary on adjusting water flow rates and the impacts of these adjustments

Great video as always

Another great great video

A SOLID MOMENT IN HISTORY KEEP UP THE GOOD WORK.

Great explanation.

Great video,thanks 👍

A very informative and detailed video. Can you recommend a textbook for chiller maintenance and repairing? Thanks

Very good information.

Really good explanation

Best explain .❤

Great video 💯💯💯💯💯💯

so gret learning chillers fanda thank s sir

Nice explanation sir

Good content brother 🤠

@HVACTIME

2 жыл бұрын

Thank you

Mmmm sweet knowledge

Very good video. I’d like to add that the reason the approach goes up when the water flow is too low is because the water will go into laminar flow (as opposed to turbulent flow). Laminar flow is when the flow is so low that the water flows down the center of the tubes and is stationary on the tube edge where the heat transfer is taking place. Think of a small stream with very low flow. You’ll see the water and leaves flowing down the center and the water is stagnant on the sides. Turbulent flow has all the water mixing up going through the tubes. In a chiller, when you approach laminar flow, you loose you’re approach very quickly.

@HVACTIME

Жыл бұрын

I agree, this has been a very challenging topic of discussion on this channel overtime.

@MR-backup

7 ай бұрын

You mean for a Flooded Type Condenser Barrel, right?

Approach also tells us how efficient the heat exchanger transfers heat. If the tubes in the water cooled condenser are dirty your approach temperatures will go up and vice versa. Punching the tubes is a good idea, and keeping tower water clean and filtered

. The closer these temperatures are to each other, the more efficient the heat transfer.

@genegonzalez4713

2 жыл бұрын

I think I was referring to the Approach temperature

One of the tools a chiller plant engineer or operator should always have is a ( PT CHART) pressure and temperature chart. Another tool needed is the pressure drop chart needed to determine flow rate on each chiller barrel. Now a days they have a ultrasonic flow meters on your bldg automated system

Thank you for this video. Please do mention the unit of Temperature you are working with either °F or °C

@HVACTIME

2 жыл бұрын

Good point, I was using °F

Can you list acceptable ranges for each type of approach in fahrenheit please? Condenser approach Evaporator approach Cooling tower approach Thank you 🙏🏼

Hi , I have 3 "Carrier 5H80" compressors in tandem configuration , besides the oil equalizers on hand hole lower connection , there is also piping on the same hand hole on upper hole which are connected to all 3 compressors , do you know what is it for ?

Can you recommend any good chiller classes given by manufacturers to help us build a chillers division?

What’s the best approach value on a 80 ton CGAM for the evap EX? I was running 7 degrees the other day. Just getting into chillers recently and your videos have inspired me to take this path.

@HVACTIME

2 жыл бұрын

A typical range is between 3F to 10F

Is that bottom on the hybrid the subcooler? Is there a subcooler on the flooded barrel?

Need more details wanted

You briefly mentioned WSHP with co-ax coils. Just curious what information can be gleaned from condenser approach on those systems? My first thought would be that a higher approach would mean that coil was likely starting to get fouled, what would you consider a normal approach on such a system?

@HVACTIME

Жыл бұрын

The approach will be higher, typically around 10F

I know 0° approach is ideal. But that also depends on the design. Some chillers are designed for a 2° approach. So if u r running 0° you r running the chiller outside of the design of the chiller.

@brad8665

2 жыл бұрын

Trane centrifugal is 2°

Approach temperature? In essence the Chiller approach is the temperature difference between the water and the refrigerant.

Hello Buddy, we appreciate your clips on the Centrifugal Chillers; Do you have any clips on adjusting the metering valve on the MqQuay / Daikin Centrifugal Chillers. As it seem though you adjust the pilot valve, the main valve, seems to be very lazy in responding, any advice?

@enternaty

2 жыл бұрын

I have a 500/ton McQuay Centrifugal Chiller @ 4160 Volts, where the Discharge Superheat is suppose to be 15-18 *F with the liquid injection off @ 100% however, im just getting carryover which is preventing the oil from returning to the Oil sump to maintain the Oil level required. Discharge superheat is falling to 1*F

I have a question, is the chiller the condenser? I'm asking because my teacher was calling it an evaporator but he may have misspoken and I don't want the wrong idea in my head :(

@HVACTIME

Жыл бұрын

A chiller will have an evaporator and a condenser. The condenser can be water cooled or air cooled

I notice these are large scale water medium devices. Would these designs be viable in residential scenarios?

@HVACTIME

2 жыл бұрын

No, wouldn't be efficient enough. And requires more advanced service ability and cost. Some of the original residential system used chilled water but the industry quickly moved away from it.

@achempel46

Жыл бұрын

In residential it's more important to look at superheat, subcool, delta t, and static pressures. I have the measure quick app for ease of getting all these in one place and reporting that information at the end of the job. It will throw you off if you look at condenser approach often it's negative which is a sign of liquid line restriction but there's no measurable difference from the condenser outlet and entering the expansion valve.

@MR-backup

7 ай бұрын

@@HVACTIME " Some of the original residential system used chilled water but the industry quickly moved away from it. " - And now green measures are making residential go back to it 😆😆😆😆

What the causes if the approach temp of evaporator is negative sensors are New

@HVACTIME

2 жыл бұрын

What machine is this on?

When you talk about Approach as far as a chiller system you should be very specific because each component has his approach there are Different types of Approach: 1. Condenser Approach Temperature 2. Evaporator Approach temperature 3. Cooling tower Approach 4. AHU Approach Temperature

@HVACTIME

2 жыл бұрын

I specified chiller approach

Are you familiar with Smart air cooled chiller?

@HVACTIME

Жыл бұрын

I am their water cooled but not air cooled.

Deez

Try to be more accurate direct and concise about your chiller tutorials, when you use lot of rhetoric it sounds a though you don't know what you're talking about

U was speaking like u was asleep. So 👎. I m sorry but its real.