MAX AC

[wax87]

You mean the "compressor" not the condenser! Yes the compressor is electric and uses 3 phase for efficiency and is a variable speed device.

The condenser is a radiator like device that is cooled by air flow and
"condenses the refrigerant from a gas back to a liquid.

Holy Buckets of Snot - whata stupid thing for me to type... LOL Yes compressor, I am such an idiot at times.... Ok so what controls the compressor speed? Delta between outside and selected cabin temps?
To control the speed of the COMPRESSOR LOL I presume a computer somewhere is varying the voltage??? or AMPS???

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[DWV]

Holy Buckets of Sh_t - whata stupid thing for me to type... LOL Yes compressor, I am such an idiot at times.... Ok so what controls the compressor speed? Delta between outside and selected cabin temps?
To control the speed of the COMPRESSOR LOL I presume a computer somewhere is varying the voltage??? or AMPS???

Yes, it has to be computer controlled with inputs from manual demand settings for fan and temperature, and other sensors for temperature differentials. I don't know how the 3 phase motor is controlled for speed; I have a three phase controller on one of my drill presses and its "magic" to me, but I believe it varies the frequency of the phases.

 

[Blue_Max]

1) the air gets stale, especially if you're a smoker. 2) windows will fog up, even ice up in the winter in the colder climates. 3) Try wearing contact lenses in recirculate mode; they dry out and it feels like your eyes are full of sand.

I don't smoke, I'm not in a colder climate, and I don't wear contacts, so none of those downsides exist for me.

And when I'm in a cold climate, and I don't even turn on the regular A/C!

 

[Markii56]

I don't smoke, I'm not in a colder climate, and I don't wear contacts, so none of those downsides exist for me.

And when I'm in a cold climate, and I don't even turn on the regular A/C!

And none of those conditions would EVER apply to some of the other people reading this? Thank you for informing the rest of us that the universe revolves around you.

 

[SloopJB]

Compressor speed? Because it is electric it can run at different speeds? Is it just two speeds or is it variable?
If I wanted to cool quicker, but not have the loud fan in the cabin, shouldn't I run MAX AC and turn the fans speed down?

My FX4 is different. It is more conventional and goes into “turbo boost”. Higher fan speed and faster cooldown. At least it feels that way. One for the Ecoboost

 

[inline_five]

Thank you, I am not really asking how to operate the system, I am wanting to know the engineering principles and logic on how the system works.

Gotcha yeah that would be good to know

 

[HeyBales]

1) the air gets stale, especially if you're a smoker. 2) windows will fog up, even ice up in the winter in the colder climates. 3) Try wearing contact lenses in recirculate mode; they dry out and it feels like your eyes are full of sand.

Usually if 3 is happening due to dry air, then 2 can't happen due to moist air.
Unless decent winter and more moist inside than out. In which case eyes going to dry out same as in a home during winter - low humidity and then warming air up making it worse.

Usually only winter interior icing up I get is after snow hiking and wet boots thaw out in vehicle, and it's cold enough I'm guessing the condensate line is frozen somewhere not allowing the moisture to drain out.
But those are pretty specific conditions though, and sometimes at that point the outdoor humidity is lower than interior anyway - so vent open is a benefit.

Why I keep a thermo in cab with remote sensor in bed - while the values are somewhat skewed in summer to reality - useful in winter usually, to read cab and outdoor temp & humidity compared to wherever the truck is getting it's value.

Forscan Lite has a reset & calibrate function for the temp sensor - I'm still curious what it's calibrating against, haven't done it yet.

 

[wax87]

Yes, it has to be computer controlled with inputs from manual demand settings for fan and temperature, and other sensors for temperature differentials. I don't know how the 3 phase motor is controlled for speed; I have a three phase controller on one of my drill presses and its "magic" to me, but I believe it varies the frequency of the phases.

• Frequency Control: This method through variable frequency drives (VFD) usually comes out with an almost linear characteristic between torque and speed. The motor can give a constant torque developed over a wide range of speeds, which is very important in some applications where fine regulation of speed is needed.

 

[MakinDoForNow]

You mean the "compressor" not the condenser! Yes the compressor is electric and uses 3 phase for efficiency and is a variable speed device.

The condenser is a radiator like device that is cooled by air flow and
"condenses the refrigerant from a gas back to a liquid.

Any device that liquefies the refrigerant is the condenser so it would depend on the pressure it's compressed to. ?? I will tied to calling it a compressor though.

 

[Blue_Max]

And none of those conditions would EVER apply to some of the other people reading this? Thank you for informing the rest of us that the universe revolves around you.

You replied to my post with your personal reasons, and I replied to your reply with my personal reasons. Why do you have to be a jerk about it?

 

[DWV]

Any device that liquefies the refrigerant is the condenser so it would depend on the pressure it's compressed to. ?? I will tied to calling it a compressor though.

A liquid cannot be compressed.

The compressor takes low pressure, refrigerant as a gas and increases the pressure and the temperature which then allows the high-pressure gas to be condensed into a high-pressure liquid. This takes place in the condenser as the high pressure high temperature has its temperature reduced due to the flow of air over the condenser.

High pressure liquid, then travels to the expansion valve or expansion tube where the pressure is reduced, and the temperature of the refrigerant is also reduced so that it can actually do cooling which is done in the evaporator. Low pressure liquid absorbs heat in the evaporator and is converted into low pressure gas.

The low pressure gas is then fed to the compressor where the cycle begins again.

 

[inline_five]

A liquid cannot be compressed.

The compressor takes low pressure, refrigerant as a gas and increases the pressure and the temperature which then allows the high-pressure gas to be condensed into a high-pressure liquid. This takes place in the condenser as the high pressure high temperature has its temperature reduced due to the flow of air over the condenser.

High pressure liquid, then travels to the expansion valve or expansion tube where the pressure is reduced, and the temperature of the refrigerant is also reduced so that it can actually do cooling which is done in the evaporator. Low pressure liquid absorbs heat in the evaporator and is converted into low pressure gas.

The low pressure gas is then fed to the compressor where the cycle begins again.

Bro is ready for the 608

 

[DWV]

I wish I knew what a 608 was or is

 

[Markii56]

You replied to my post with your personal reasons, and I replied to your reply with my personal reasons. Why do you have to be a jerk about it?

"Personal" would be a private message between you and me, that only we can read. An open post on a forum that all 34,184 members can see and read is anything BUT personal. I think if you re-read your response in that light, you'll understand why I responded the way I did.

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