AC Coil Is A Block Of Ice! How To Fix And Test
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- čas přidán 25. 02. 2023
- Carrier ac keeps freezing up, customer has to run the ac in the winter because of high heat load. I find high static pressure and other problems.
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Those switches last way longer if you add a relay for the fan and use the switch to break 24v to the coil
I agree. You won't be switching as large of a load.
You would think the little screw on switches would last longer when switching a relay but I have not had any better luck doing so. After 2 of them failed in a short period of time on the same system I installed a ranco like in this video. Been working fine ever since but I did leave the relay in the circuit.
@@tomoliver8498 I don't like the encapsulated switches either. I think the repeated cycling just causes them to fail whether you use a relay/contactor or not. I usually use the Ranco switch combined with a relay for small motors and a contactor for the larger motors. If the motors have sleeves instead of ball bearings then I try to sell the ICM head pressure control kit. Some customers don't want the extra cost even after you explain shortened motor life to them. 🤷♂️
I agree 💯👍👍
A heat recovery system would do great there, madness there is no economizer.
Bad ambient control causes ice freeze up traditional ambient control recommended.
Nice work Rick. Thank you for the knowledge.
Nice little vid Rick ... Thx for posting ...
Personally a fan of ICM 333 with the pressure transducer for low ambient fan control back when I was doing HVAC service, used to carry a few for situations like this
We use the Total Line version from Carrier 👍👍
Dewperheat for superheat bubcool for subcool per hvacr school, another way to remember glide
I like that 👍👍. Whatever makes it easiest for somebody to remember is good with me 🤜🤛
I have a 28 year old Coleman in a manufactured home. It's on life support, and I'm doing manual defrosts, as we're in the PNW and defrost is only needed maybe 15 days out of the year, and I don't like to run the heat strip. A recent snow storm knocked loose the wires I was using to operate the fan and reversing valve from inside, and I was unable to stop the fan for one night, so the coil only half defrosted. Too late to make a long story short, but even with a half inch of ice obstructing all airflow, I guess the heat of the compressor was enough to satisfy, because it wasn't running continuously.
This thing has taken a fair amount of abuse and kept running nicely. I won't be too heartbroken if it gives up the ghost, because I'll be able to install a mini split.
Awesome video thanks for posting.
I like those ICM fan speed controllers...i tend to not use that thermistor that it comes with, and i usually install the optional transducer. Hopefully its a ball bearing motor and not sleeve bearings. Great video as always Rick
The vinyl tubing is a great trick to keep from rub outs
We use the Total-Line version, usually these motors are cheap sleeve beings.
Great vid Rick!
Thanks Ryan🤙
Nice job 👍👍👍
Nice video.
Better safe than sorry my man it’s the little things sometimes that saves you Heart ache
Very True~
Over here they have kind of a plastic " serpentin " which is almost like a piece of vinyl tubing but cut in a way that you can wrap it around a capillary tube very easily , and it protects it just as good .
It kinda wraps around the cap tube like a cobra snake wraps around its prey , just to illustrate the idea .
I don't know what the make is or if there even is a part number for it though ...
I'm pretty sure I know what you're talking about. You see it more with electrical wires
Those capsule switches are just a callback waiting to happen - best to just change them out with an old mechanical switch like you did.
Thanks Mike🤜🤛👍👍
@@HVACRSurvival Used to change the ones out on the units at our local 911 Dispatch annually - now I have them all changed out to the oldschool refer controllers.
The capsule ones are definitely quicker to install, but you'll just be back switching them out - especially down here where they're off and on 90% of the time....very few days of sustained cold weather.
Can you do your MB3 bag setup please? =)
69 degree temp will cause freeze up.
That Telesin collar seems pretty decent to hold the camera judging for your videos so far. Thinking in buying one 🤔
It also helps having the latest go pro 11
@@HVACRSurvival I have the 8 black and the stabilization booster is powerful.
The vrf systems is what that place needs
We have city multi systems at a few places but it's $$$$$, what they need is commercial equipment but these places cut costs everywhere.
@@HVACRSurvival yeah they need a mixed air box and economizer at the least. It's ridiculous to be running mechanical cooling when it's cold outside.
Great Video. Thank you for sharing. Is that low pressure switch you replace ? what is do for AC of that unit ? I saw it on refrigeration unit ? How set up differencial and pressure ? I'm new to hvacr
The switch I removed was a switch designed to close on a rise in pressure and open on a drop on pressure. They refer to it as a fan cycle switch, but it can be used for different applications. The purpose is to build pressure on the high side so that the metering device can maintain a normal suction saturated temperature above freezing. Set can be done different ways but essentially you want to keep your suction saturated temperature above freezing.
The style of fan cycling switch that you removed looks like it is rated at about 1 amp, or pilot duty, and should have a 24 volt coil that is energized by that fan cycling switch to actually power the fan, thus it can last many years. I would rather have the control you installed, good for about 15 - 20 amps at 240 volts, so will also last for years.
A word of caution, I had to replace a compressor on a small heat pump that had a fan cycling switch (looking at the furnace, you do not have a heat pump) and it was because the fan cycling switch kept the outdoor fan off in the heating mode. I installed a relay that was energized when in the heat mode, thus keeping the outdoor fan energized all the time in the heating mode (unless in defrost).
Thanks, yep, I've had to add a bypass relay to heat pumps with fan cycle controls in the past for the reason you mentioned👍👍
@@HVACRSurvival I've had to do this too. Some forget that the condenser becomes the evap in heat mode. The ICM head pressure controls feature a heat mode override but I like those Ranco switches too. The sleeve bearing motors don't like short cycles though.
@Topher yup...sleeve bearings need to spin at full speed to wick up the oil onto the shaft...then can slow down. The off/on with sleeve bearings will equal a short life span.
@@jasonjohnsonHVAC they can pay me to replace it, since they were the idiots that wanted this kind of system 🤣
Where can I buy them brass tees like you used?
Any supply house. Called swivel tee's. Usually comes in a 3 pack ( JB branded )
mmm, tasty pink cotton candy. I played in 36" deep white cotton candy last week, below that was 3/8" plywood, cellulose blow in and pink cotton candy sheets(bats) and of course I had to run wire middle of joist level in the mix of batts and cellulose. snow shovel, circular saw(plywood) and a lot of cussing.
I've yet to quit itching and scratching from it 🤬🤬🤬
😂👍👍
are you close to east palestine where the train derailment is
Luckily no I'm in the north west corner, that was in the south east corner
They using a fan cycle switch for R22?
Never mind. Jumped the gun on the comment. My bad.
🤣👍
194 thumbs up
Do they have returns in each room
This only does the hallway.
@@HVACRSurvival oh ok
@@HVACRSurvival good job on that particular call I’ll get me some fan pressure controls put on my van asap
👍👍✅
I'm curious what the parent company of this facility is, it looks quite familiar to me.
I saw in another comment you're maybe in the toledo area? I'm definitely thinking this is a Tril property
Not in Toledo, not sure who Tril is, but my videos are here to share and help others in the field, not start problems for my customers.
"Patient rooms" aka "Victim rooms"
👍👍👍🇺🇸👀