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Thanks for that reply. I was just curious because Carrier and Lennox around here have had zero issues with supply but I know Lennox has supply warehouses about every other block around here it seems....

Just a general question about the status of Trane right now. My in-laws have a trane heat pump with AHU/elec strip aux that is less than 3 years old. I dont know the model numbers but doesnt matter,...

Thanks for the warning. I'll take some tools to measure when I go there and verify. The old system was still an R410 Carrier 13 SEER. So it was sill fairly "modern" and the blower was PSC without...

I dont need help with how to change things or implement the changes. Thanks. Was just looking for knowledge about system/equipment. Whole home dehumidifier is not needed for this house. It has...

Unfortunately it appears not even a t-stat cannot do that with this system. There is a dip switch on the compressor control board that is used to enable/disable "comfort" setting. Apparently this...

I went through all the documents on the Bosch unit and the heat pump only has a single Y terminal connection. No way to connect a Y1 and Y2 to the heat pump and that makes sense based on how this...

Contractor came out and changed the t-stat to a version with an outdoor temperature sensor and a balance point setting. It appears all should be good now.

It sounds like humidity control is the...

Of course but with a varying capacity system, if the CFMs can't vary with it, then latent cooling capability can't be set properly even for a properly sized system. But there is no "size" with...

Interesting. So it sounds like there isn't any way to control humidity levels with this setup.

What about balance point control? How is that done?

My parents got a new Bosch system installed as follows:
BOVB20 variable capacity heat pump
BGH96 2-stage propane furnace
Pro1 Technologies T855 t-stat

I thought all these variable capacity...

I forgot to add this question. So lets say the Zone can handle 800 CFMs and we have 2-stage, 2-ton AC unit. Does the system operate such that it will always send 800 CFMs to the upstairs zone? Or...

My current system is 2-ton.

When I have multiple zones calling for cooling, my upstairs gets reduced airflow until the 1st floor stops calling. When it is 95F with a 75F dew point, this means my...

From what I read, you dont have to set a CFM level per zone, correct? If you dont set a CFM level, if a zone is calling for first stage it should run in 1st stage at 1st stage CFM levels, correct? ...

Does anyone here have any experience with the Econet Zoning system? From what I have read in the manual, installation instructions, etc. it seems like the most sophisticated communicating zoning...

Final update if this does indeed happen to anyone else or for just my avid fans following this riveting thread.....

I sent an email to Aprilaire and they actually called me back. Turns out these...

So I had the damper replaced under warranty and the terrible squeaking stopped for 3 or 4 days and now the terrible squeaking is back and the damper motor is too hot to touch. Can anyone verify this...

How hot should a zone damper motor (spring open, powered closed) get while it is being held closed?

I have a damper that is very hot to the touch. It also squeaks really bad when releasing...

I have confirmed the iComfort and iHarmony cannot operate the way I want them. I would need the LPZ4 lennox zone control to operate the zoning the way I prefer and I need traditional t-stats in each...

I have hated my Lennox iHarmony zoning setup since it was installed as it doesn't match CFM to output. It matches output to CFM and it drives me nuts. I hired a local contractor to replace...

absolutely! it is a way of life for me unfortunately.

I think the controller at the return duct sounds a nice simple setup. The biggest issue I see with it is that it is more difficult to...

In that case, let me throw a wrench into the question. What if a house has 3 zones and each zone has the ability to measure RH% and enable the humidifier on calls for heat?

So is a t-stat in the living space more prone to false readings? I would have thought returns to be the most leaky part of a house and the most likely to be off compared to the air within the living...

What are the pros and cons to humidification control/measuring from an in-room thermostat vs using a dedicated humidistat that is located on the return duct and does the humidity measurement in the...

I think that would be a fine solution but I think that will cost as much as a new t-stat! I'll have to get some quotes.

Thank you for the suggestion.

and after running a large room humidifier on high for about 20 hours now, there is still no increase on the t-stat humidity level reading. I think that answers that. bummer.

Thanks for the...

i am beginning to think my t-stat may not be reading right. I put a traditional room humidifier in my living room and will run it non-stop for a day or two to see if the humidity reading on the...

I think it was fine up until the solenoid valve failed 3 weeks ago. Maybe I had not been paying attention but I usually monitor things like a hawk. i always watch zone and room temps closely along...

The home energy company that did the blower door test. House is 5 years old.



yes. The solenoid valve opens, hot water flows, a steady stream of excess water drains out of the bottom of the...

It is a tight house but just enough infiltration to not need an HRV/ERV.

Lennox iComfort WiFi controls the humdifier. It has always been accurate as far as I can tell and my wife's nose can tell....

I installed the new 35 panel last night at 8pm. The overnight low was around 32F. The furnace should have run a decent amount. Humidity went from 31% to 32% overnight when i checked at 7:45AM this...

now that would make some sense. There is not much coating and i seem to remember the pad coming out of the box with a light whitish coating but not sure. That gives me some hope. Thanks!

I already have new humidifier pads on the way but thank you.

I'm still not sure this is the issue though. Are deposits visible? The current pad is all silverish metal with no visible deposits...

So what changes with the pad over time? When I washed it with some vinegar it looked brand new. What causes the performance degradation?

System:
Lennox SLP98 70k Furnace
Lennox XP 16 2-ton HP
iComfort wifi T-stat
iComfort zoning controls (3 zones)
Aprilaire 600 humidifier fed with hot water & controlled by t-stat
Humidifier...

Looks like evap coil has a leak and will be replaced. Part covered under warranty but labor is not :(

The old coil is CX34-38B and is discontinued. Does anyone know what the new version of this...

Used the sniffer inside rather thoroughly. It read really strong at the leak point. He ran the sniffer around the outside coil to see if anything happened. Nothing did. If there is another leak,...

Just to update this in case anyone is rigorously following my adventure......They came back out today to search for the leak and found a nut at the TXV on the interior coil that was leaking. They...

That seems pretty clear even to me. Apparently the young guy was mainly familiar with charging piston valve AC systems. That is all sausage to me but at least someone got a learning experience out...

The system does indeed to be working properly again. It is cycling on and off despite being hot and humid again today. I guess it will be interesting to see where they find the leak.

If by Lennox you mean the dealer, I don't think they really know where the best setting is for the blower because of the zoning. They just know to shoot for 400CFM. Right now I am keeping it at...

If you are talking about the original post of this thread, it was about 92F outside and it was just after they finished letting some out. Conditions were almost exactly the same as when the 2nd tech...

SLP98UH070XV36B-09

I have the AHRI certificate for the XP16-024 and the CX34-38B coil being a matched system. That part is good for sure.

As for if it is leaking, I will have to monitor and let them know when...

They said there was no point measuring superheat on my system for whatever reason. I thought he said something about because there are two TXVs in the system but I am not 100% on that. Sorry.

OK. Tech just left. When the tech started measuring this is what they found (92F outside temp):
- 118.7
- 297.3
- 1.8 subcooling
- inside supply vents in room 69.7F

Added refrigerant and...

I agree. That is why I try and set the upstairs zone to 700CFM so that it can get closer to full cooling capacity for that zone. The first floor doesn't use much so I use 525CFM to match with what...

I apologize for being vague. Yes, it was also verified with pressure gauges but I think you missed part of my post. Lennox's iComfort communicating system does not vary the blower speed based on...

The iComfort communicating system is rather silly, IMO. It doesn't match CFMs to staging. You set the CFM per zone and then it modulates staging as necessary. That is probably great for fully...

I believe the return air temp was measured to be about 78F.

here is some additional info of the outside unit and indoor coil. I don't see a TXV. Is it located inside the coil casing? Also, is this a 3ton coil?

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