Air Handler Install 3D (AC / Heat Pump)
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- เผยแพร่เมื่อ 23 ก.ค. 2022
- This 3D video shows how to do an air handler install for a heat pump system. It is a companion piece to our condenser 3D install video ( • Condenser Install 3D ) and is primarily based on best practices for our Central Florida market.
Before you leave the shop, ensure that you have the proper equipment, tools, and supplies. The model number needs to match the one on the proposal, and you need to make sure that you have all of your duct fabrication materials.
When you arrive at the job site, recover the refrigerant from the old system. Purge hoses and weigh out the charge. Close the refrigerant lines once you’ve finished. Ensure that you have proper eye protection and that you wear a respirator when working in contaminated areas or are cutting duct board. Lay down drop cloths and make sure you have a means of disposing of garbage responsibly.
Before you remove the old equipment, the circuit breaker should be off, and you need to test each leg of power to ground. Clean and cut the copper tubing. Cut the drain with PVC cutters and disconnect all of your low-voltage control wires. Use a level and mark the duct board where it needs to be cut to get the squarest possible cut. Once everything has been cut and disconnected, you may remove the unit. Since the line set is open, now would be a good time to flush the copper tubing. We often replace the return box, and we replace wooden duct board supports with metal studs.
To cut duct board properly, you need to account for the thickness of your duct and understand how the tools work. As such, be sure to measure the inside dimensions when planning and making your cuts. Once you’ve made your cuts, you can assemble the box. Once you’ve got the box assembled, tape it at the edge where it all comes together with silver tape. Use alcohol to clean the duct surface, if necessary, and use a tape squeegee to get the best possible connection. Then, go over the silver tape with fab tape and use an outward-cinching staple gun on the taped surface. With the duct assembled, you can make your endcaps with plenty of overlap. Once the duct and endcaps have been put together, you can apply mastic over the joints.
Extend the new copper and PVC through the platform. Then, seal the chase. Once the PVC and copper are in place, you can assemble the plywood platform. The plywood should have openings for the unit and the copper and PVC. To assemble the platform, you would put the return box in its place and add the plywood faces around the platform, ensuring that the plywood is level. Fasten the plywood platform with basic screws.
Using the large hole you just made in the plywood as a guide, cut an opening in the return box. Allow the unit to have a little bit of height over the return opening so that you can access the filter more easily. Apply mastic to the top, and then add the filter base and unit.
Clean the existing supply duct with alcohol and a rag. Then, cut some more duct board and use it to connect the supply duct to the unit. There should be plenty of foil overlap, and we recommend going over that foil overlap with some outward-cinching staples. Apply silver tape, fab tape, and masking tape before applying mastic. Remove the tape before the mastic is allowed to dry. In some cases, the unit will be directly underneath the duct, but it’s more common for it to be offset. You will need to cut the duct board at an angle with precise measurements in the latter case. We also recommend sealing the base of the unit.
Then, flow nitrogen while brazing in a new filter-drier and the air handler. Protect heat-sensitive components with a wet rag or a heat-blocking putty. Using a neutral or slightly carburizing flame, heat the base material to a cherry red color and draw the alloy into the joint. Do a pressure test and use a leak reactant to check for leaks. Pull a vacuum and ensure that the system passes the decay test.
Ensure that you have the correct breaker size. Then, install the high-voltage wiring and auxiliary heat strips; the wires should be appropriately sized for the minimum circuit ampacity (MCA).
Pipe in the PVC drain using a pipe sealant. Then, make sure your drain has a trap, vent, and cleanout. Assemble PVC connections with medium-duty PVC cement.
Wire in the low-voltage connections at the unit. Set the ECM blower board to match the system tonnage as necessary. Make sure the connections are appropriate at the thermostat and seal the opening with putty. Test in heating and cooling mode, making sure to check your heat strip amperage.
Then, you can set the charge after letting the system equalize by running for at least 20 minutes. Weigh in the charge with a scale.
Check the system delivered capacity, delta T, total external static pressure, system airflow, and other important test measurements.
Read all the tech tips, take the quizzes, and find our handy calculators at www.hvacrschool.com/.
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Always incredible work/instruction. Thank you for all of your content/material.
Best teaching videos on TH-cam
It's pretty sad out there in the field, I haven't seen an install this good ever !
😂
Maybe work for a better company then
@@MeanieTV Its the work being done in the field in general, terrible.
@@Garth2011 well that’s true. But I will say if your guys aren’t doing clean work then someone needs to take the lead
@@MeanieTV Wasn't referring to my people.
one bad dude!!! tech,humor,great teacher and down to earth personality! he’s rare guys! very rare. i’ve learned more from him fast than anywhere else. thx B!
Maybe the best video on TH-cam on this topic! Keep posting such great work guys!
Outstanding animation video of an air handler replacement. Keep up the great work.
IT WOULD BE SO AWESOME IF YOU DID A 3d ANIMATION ON A HORIZONTAL AIR HANDLER IN THE ATTIC
Really great animation and instructions.
Awesome video as always!
Brain, You do a VERY GOOD JOB IN YOUR CLASS AND VIDEOS. GREAT JOB.
Amazing work. It's greatly appreciate.
Thank you for this!! I like to compare different install practices with ours
Using multimedia and animation, changed the game drastically 🏎
Very well done - thank you so much. My home has duct board as well and what I don’t like is how it collects dust. However, modifications and replacement of panels is so easy, and super quiet. Seriously, I can’t tank you enough for your amazing presentation.
*Great Presentation, I have done many HVAC replacements in my life && this presentation was excellent, but keep in mind everyone has their own way or technique of installing. The process still follows the same sequence of operations. The old school way without the digital is still ok but ONLY if you truly know what your doing. Always double check with your freon gauges if issue cannot be figured out vs digital*
Great video. Thanks Bryan.
Awesome as always !!!
Excellent tutorial
Thank you! Im in south carolina, but most of this info is applicable to my state as well.
Incredible guy's!!
Thank you well done.
Wow I am shocked this video is so good.
Cool as hot and cold way awesome graphics
I would love to do some duckboard duct work before I retire.
Awesome video as always
Not missing out on nothing .after a while of inhaling that stuff it gives you hemoroids 😂
Sheet metal all the way!!
I've never used or seen the ship lap blue duct board tool, the v-cut red tool, or the duct square.
It is great 3d video
Thank you for sharing
Thanks Engineer 😊😊😊
Wow,I learned so much
Patiently waiting for Jim Begmans comment on the supply probe placement lol
Best video
I envy that you still work with duct board. We only utilize it if it’s currently with the old unit.
Really? Sheet metal all the way man.. what makes you prefer duct board?
@@greglandry1225 easier to cut lol
Nice video
the white wire is connected to w1 on the air handler but is connected to w2 on the thermostat
Man... really nice animation. What did you use for that?
In Washington state our installs are a little different, but similar process
Never even got to see duct board here out in San Francisco California.
I hear guys curse at it and call it A bunch of bad names.
Probably for the same reasons I curse at and call flex duct a lot of bad names.
The installers imp properly installing it or not being used into correct situation.
Literally tens of thousands of homes in San Francisco still have their original metal ductwork covered in asbestos wrap Actually holding up in pretty good condition for being 80 years old from the old gravity furnaces.
You guys rock! Is it necessary to anchor the air handler to the intake plenum? I notice it doesn't come with any predrilled holes to do so.
Loved this video. Could you recommend a company in Miami that could replace our entire system and add an integrated dehumidifier once our remodel is over that will follow closely the quality of this installation video??
That float switch is gonna fill up with condensation randomly.. I always get calls for ones like this
on the air handler the white wires are connected to W1 but on the thermostat the white wire is connected to W2
It must be nice to replace a unit under the garage, In Louisiana they are mostly in an attic..
in a perfect world, what is the average time frame for the install and how many installers?
This install is definitely top notch, I wonder how much more yall charge for all of the extra time and material. Not trying to take away from the install, just honestly curious.
I’d say the customer is about to pay a pretty penny for a install like that.
@@artgonzalo4115 oh yeah I think so too
If it was me! $500 for the platform im not a carpenter im a hvac guy but because its carpentary i would charge that plus a carpenter wouldnt have an idea how and where to cut so yeah.
The rest would be competition price
If i had to get rid of the old concrete pad or move it $200 just to be nice
Always remember what we charge isnt to go buy candy its because we know the medical bills that are coming to us when we get old..gotta think of the wear and tear on the body
Sorry if this may sound like a stupid question. All the air handlers I have seen use a centrifugal type of fan design. In this fan design the air intake is parallel to the rotation of the motor and tangential directed to the side (like a 90 degree angle). The output if is blown directly to the evaporator. But why is the air intake of the fan not positioned accordingly? I am not an expert in air movement, For me it shouts air restriction. The speed of electronic signals going through twisted copper pair would be hampered if the wire bent in a 90 degree angle. I apologize in advance, I am not in the hvac industry.
Shouldn’t you have wired to W1 at the thermostat or W1 plus W2? I think that Ecobee will be upset if it sees wiring to W2 without anything to W1.
One thing he forgot tho is, your suppose to make sure chase doesnt have water that its clean that way it doesnt messup superheat rating
This seems like a lot of work
You are a lot of work
No need to use the tools to remove the cores, just use the "grabber or other core "grabber". There is nothing to leak out, so why the extra and unnecessary step?
That's true. We actually just used that because that's what we already 3d modeled
At 10:45, it seems that there is not an airtight seal between the return air duct box, and the plywood enclosure, allowing air to be drawn in from inside the plywood enclosure.
Do y’all measure your copper by ID or OD.
My air handler was plugged into an electric extension and the extension into the outlet … Even my small appliances instruction state not to use extension cords. Is this acceptable when connecting the handler to electricity?
How does the condensate float switch line not immediately fill with water?
The secondary port is at a higher pan level than primary
**On the transition plenum, is the back piece and front piece always the exact same piece? I noticed you didnt show an animation when you cut the front piece so im assuming it was the same as the back piece.**
Depends on the secanrio. Front piece might need to be taller to make up for a steeper angle to the supply.
@@MeanieTV oooh ok. 👍
Did you forget the starter collar, that won't pass in my area?
That's not a thing here
@@HVACS It is in Pinellas Hillsborough and Pasco Counties (Florida) I Neglected to say it was a great video.
@@HVACS I checked with the building inspector. It's a thing in Florida. You should update the video. You cannot attach the plenum unless you attach a starter collar first and then slide the plenum over and screw threw using Vulcan washers. There is no way to attach plenum to a half inch lip coming off the air handler properly.
furnace next?
Bet those installers have no idea how to use a Pittsburg machine. Just like ours would have no clue what those red and blue tools are. Duct board is against code here. Needs to be all sheet metal. Either interior or external insulated.
Sheet metal is the only way in my opinion
And also, I think a monkey could use a pittsburgh machine... but there are lots of tricky parts to fabricating ductwork... I love fabricating duct/fittings
cement on non pressurized cond line🤔
Why no seal on the inside of plenum?
What do you mean? Duct board is porous and cannot be sealed from inside
17:00
All the goodwill I had for this channel is gone. I wouldn’t work with duct board.
You must not listen either. He literally said this is a Florida install. We don’t use metal here.
@Mike just make sure you insulate it well or it will be wet rubbish too
@@MeanieTV for real? No sheetmetal duct at all in Florida? What about commercial jobs? And obviously industrial has gotta be metal
@@greglandry1225 commercial can be metal. But this was a resi tutorial, not commercial
@@MeanieTV okay I got ya.. thanks brother... how come you can't use sheetmetal though?
*Mrs Charlotte is legit and her method works like magic I keep on earning every single week with her new strategies *
Your forgot Heat shield and mechanical fasteners rookie
Here come all the northerners hating on our practices
Left handed people????
😅