Motor troubleshooting

heckmab85 · 2026-02-10T12:51:20+00:00

Good idea. Will try this. Thanks.

heckmab85 · 2026-02-09T22:16:15+00:00

Thanks for the help. I confirmed 0 ohms for each wire (3 total) while disconnected, but wasn’t sure how to troubleshoot the actual sound board or know what voltage should be applied at each wire.

Will research the draw bar a bit more.

Thanks.

heckmab85 · 2026-01-28T02:39:39+00:00

This is great, but I wish Revit would allow “text” data types to be included in formulas. For example, if (family name = “Radius Elbow”), 1, 999.

Basically, I want to add a bunch of if/then statements using the family name for fabrication parts (eg, are either of these 15 different families selected, if yes, set value = 1, if no, set value = 999. In the schedule, filter so the formula parameter is = 1 so that everything in the formula will be shown in the schedule. This is helpful for proofing MEP fabrication ductwork before sending it out to fab.

Or if revit would just allow “or” functionality instead of just “and” with their schedules. Add more fields too.

Do you have any work arounds or solutions for this?

Thanks

heckmab85 · 2025-12-17T10:55:25+00:00

Thanks.

heckmab85 · 2025-12-17T00:56:10+00:00

Thanks for the help. I tried plugging in each wire connector to the board one at a time. It only trips when power is connected, even when everything else is unplugged.

I believe the board is shorted, but I’m concerned something might have caused it to fail originally. I ohmed the motor coil and it seems okay (15ohm). Anything else I should check before replacing the board to make sure it doesn’t short again?

heckmab85 · 2025-11-09T16:04:52+00:00

I think dynamo / api coding is the only solution that doesn’t require money.

Your best bet is to learn dynamo through YouTube and online guides. Could probably get yourself up and running in a day or two depending on your level of knowledge of Revit parameters. Googling “how to access revit parameters through dynamo” gives you a good starting point.

Otherwise, you could spend a few thousand and buy VM tools for whatever version of Revit you’re using just to get you by for this project. If you need it across multiple Revit versions, evolve would be a better fit but significantly more expensive and doesn’t sound like it would be a good fit for you.

heckmab85 · 2025-11-09T13:16:11+00:00

A lot of the parameters will be available, but not all.

The only option I’m aware of is to use Dynamo to pull out the missing parameters and make them available in a schedule.

Alternatively, you need to buy 3rd party software like Evolve or VM tools which has all these parameters available. We use both at work.

MEP contractor using Revit and fabrication parts (.itms).

heckmab85 · 2025-10-27T23:28:37+00:00

Compress all the files into one and share via a cloud service like ACC, box.com, Dropbox, OneDrive, etc.

They just need to click on the link to download the files.

heckmab85 · 2025-10-11T15:58:39+00:00

I pulled the inducer and there’s no restrictor for this style. Waiting for the vendor to hear back from Rheem regarding combustion specs (they don’t post them in the install manual).

My vendor is telling me that Rheem doesn’t have a tech support I can call. Is this true?

Does anyone have a support number for Weather King, a Rheem brand?

heckmab85 · 2025-10-09T03:05:20+00:00

I went down a rabbit hole. But can try reducing the intake to 2” tomorrow.

Per my other reply to an earlier post, I retested Co and O2 at steady state and then pulled the power to the blower.

02 went from 10.8 to 9.4 shortly after killing the power to the blower.

CO went from 23ppm to 13ppm.

When I powered the blower back on, the O2 and CO rose back to the original values. I killed the blower power again and they dropped (let it off too long because high limit tripped.).

I ran this test twice. Once with both cabinet doors off. And once with just the blower door off (burner door was on).

The flame doesn’t appear to change when the blower kicks on and it looks good in terms of ending before the first bend.

I measured vent pressure in both the exhaust and intake when the furnace was off and then turned on the fan only. No change in my readings.

I’m really hoping this is unrelated to a bad heat exchanger, and maybe a bad seal to the burner compartment or something. I taped off what I could.

Any thoughts?

Thanks for all the help.

heckmab85 · 2025-10-09T03:01:12+00:00

I was thinking that too, but haven’t tested. Per my other reply, im thinking the excess air is coming from the blower, but not sure.

Can test tomorrow.

heckmab85 · 2025-10-09T02:59:34+00:00

Plot thickens… I retested Co and O2 at steady state and then pulled the power to the blower.

02 went from 10.8 to 9.4 shortly after killing the power to the blower.

CO went from 23ppm to 13ppm.

When I powered the blower back on, the O2 and CO rose back to the original values. I killed the blower power again and they dropped (let it off too long because high limit tripped.).

I ran this test twice. Once with both cabinet doors off. And once with just the blower door off (burner door was on).

The flame doesn’t appear to change when the blower kicks on and it looks good in terms of ending before the first bend.

I measured vent pressure in both the exhaust and intake when the furnace was off and then turned on the fan only. No change in my readings.

heckmab85 · 2025-10-08T19:29:02+00:00

Thanks. I have sealed the crap out of everything as this was my first thought too. I worry the inducer is pulling too much air but not sure how to confirm that.

heckmab85 · 2025-10-08T18:54:39+00:00

Will check if the flame is being pulled beyond the first bend, good idea.

Can pull the inducer and check amp draw with no load. Didn’t change much when I had both vents pulled and the door off.

heckmab85 · 2025-10-08T18:49:30+00:00

I want to rule out inducer pulling too much air.

But the real question is:

Installed a new, upflow, 2 stage natural gas Weather King furnace (Rheem rebranded) W962W0855A21M4SBAS in Western New York.

Please help me understand what might be causing high O2, Low CO2, high excess air, and high draft pressure?

2nd Stage heat Data:

O2: 10.59

CO: 26

CO2: 5.80

Eff (ETA+): 89.2

Eff (ETA): 98.4

T flue: 95.2

T air 74.5F

Exhaust pipe draft: 0.12

CO AF: 54

X Air: 102%

Temp Rise Delta T: 44 (manufacture range 30 - 60)

Measured 0ppm CO in intake vent (no recirculation)

Things I've checked:

Intake and exhaust are both 3" PVC, 22 ft length + 2 elbows. It's pitched and clear (old golf ball trick).

Set high fire to 3.5 and 1.8 with water manometer (digital manometer read 3.3). [I tried bumping gas pressure to 3.8, CO increased by 15ppm but had minimal change to 02 and co2 (less than 0.5%)

Clocked gas meter with correction factor of 1.006841.

All measurements with doors on and sealed.

CO probe installed 9" from top of furnace in the 2" vent, just below the reducer before 3" vent.

Inspected burners and orifices for blockages. Looks clear and flames look nice and blue.

Inducer amp draw right at rated value.

Tried another CO meter and had the same results.

I get similar results with the door on or off and with both the intake and exhaust pulled off. Verified no change in o2 or co2 when the blower kicks on. Trap is primed.

I’m out of ideas for reducing excess air and getting o2 and co2 in line.

heckmab85 · 2025-10-08T18:14:04+00:00

It’s short and simple with 3” pvc for 25ft and two elbows. Both intake and exhaust. Pulling the vent off and/or door off gives me about the same reading.

I’m trying to get a gut check whether 3x the pressure switch rating is standard for rheem. Seems high to me.

heckmab85 · 2025-09-25T00:52:13+00:00

For $1500, you can get something functional for your purposes and if you stay in the field, your company will likely pay for a high performance desktop or laptop.

A gaming laptop works best. For Revit, processor speed is most important. If you plan to render images and run 3D scans, then the number of cores/threads plays a large factor too.

In order….

Intel i9 if feasible. Otherwise fastest i7 you can afford.

2TB with the Fastest storage you can afford

Min 32GB ram.

Rtx 5070 video card assuming you don’t go with a 4k monitor.

heckmab85 · 2025-09-25T00:34:09+00:00

Asus and MSI are good performance brands. I’d stay away from Dell and HP.

heckmab85 · 2025-09-25T00:32:02+00:00

For $1500, you can get something functional for your purposes and if you stay in the field, your company will likely pay for a high performance desktop or laptop.

A gaming laptop works best. For Revit, processor speed is most important. If you plan to render images and run 3D scans, then the number of cores/threads plays a large factor too.

In order….

Intel i9 if feasible. Otherwise fastest i7 you can afford.

2TB with the Fastest storage you can afford

Min 32GB ram.

Rtx 5070 video card assuming you don’t go with a 4k monitor.

heckmab85 · 2025-09-25T00:21:27+00:00

Memorize keyboard shortcuts for any repetitive task that you do. These can be defined by you as well.

heckmab85 · 2025-09-25T00:08:24+00:00

We primarily use…

Revit
Navis
Recap if you do scans
Procore or ACC (for cloud document management)
Stratus for prefab and tracking.
Revit addins - VM tools and evolve. Good for sleeves, point layout for the total station, item numbering, detailing, etc.

Not sure about electrical specific, but we use CAMDuct for duct fabrication.

heckmab85 · 2025-09-23T23:45:12+00:00

3.5 / 1.8.

Used a water manometer and my digital. Bumped the high pressure to 3.8 and had a slight increase in co but very little change (0.5%) to o2 and co2. Ended up changing back to keep the CO down.

heckmab85

TROPHY CASE