Should be a fine setup. Not variable speed, which I would recommend for comfort and efficiency, but it should do fine. Rheem makes a good product.

No, that is not a good match. The blower on that furnace is a weak 3 ton drive, meaning it will move way too little air for the 4 ton A/C. The dealer needs to install the RGRB-07EYBGS which has a stronger blower although still a bit shy of 4 tons. If you have an undersized duct system, could still be an issue.

And yes, Rheem is as good as Trane (if not better IMHO)

Baldloonie...
I found the specs on the 2 blower units. Please help me understand the differences.
How do you determine that the blower on the furnace is a "weak 3 ton drive"?
I found the rated CFMs for each unit. Is this what you are talking about being weak? The recommended unit does have lower CFMs for heating and cooling than your suggested unit. I also see the motor is only 1/2 HP, while your recommended unit is 3/4HP. But how does one find which blower unit is a good match for for the 4 ton A/C? I don't see any such chart.
Thanks... Gary

Baldloonie is right... my mistake. Goddi, here are the specs for the furnace: http://216.122.22.11/FetchDocument.aspx?ID=77afa66e-5a73-42ee-aa96-7ca6331efdd2

You can see that the model number dictates the blower size/cfm range. Therefore, the RGRB-07EYBGS (as Baldloonie pointed out) is the correct furnace to handle airflow for a 4-ton A/C.

ryanhuges...
Interesting. What you just sent me is what I had just found too. Great, we are on the same page, so to speak. Ok... Now, please tell me how you can determine that the "RGRB-07EYBGS is the correct furnace to handle airflow for a 4-ton A/C." I see the specs but I don't know how to interpret that this model you are specifying is the correct model for the 4-ton A/C.
Thanks for your help... Gary

Ah... I just noticed that the "coil" (RCFL-HM4821AC) it the item that is rated for a 3.5 ton unit. So I am stil confused as to "coil" vs "blower" and how to match all these things up. I am trying to understand all of this because I might switch from Trane to Rheem.
Thanks... Gary

That's a 4-ton coil (see the 48 dictating 48,000 BTU capacity). You can see that the RGRB-07EYBGS has a 3/4 hp and the "G" represents 1500-1700 cfm range for the blower (4-ton capacity) as shown in the specs on page 3.

ryanhughes...
Ok...I see what you are indicating. You are saying that a 4 ton A/C requires a blower rated at 1500-1700 cfms ("G"). I was looking for a chart that stated that a 4 ton requires this rating of cfms. Is there one? When I show your findings to my neighbor, I'd like to show a chart or something to back this up. Is there anything...??
Thanks much for your help. Gary
P.S. I also noticed the contractor must have gotten his info off of the Rheem Form that is "Rev 11". The Form you are using is "Rev 15" which shows your model number with a "B" for "2nd Design Series" and with the "G". Must have been an update that he does not know of.

The required cfm's come from the required cfm per ton of cooling, which typically ranges from 350-450 cfm (the lower, the more humidity, or latent heat, removal). Therefore, 4 (tons) x 400 cfm = 1600 cfm, which is in the 1500-1700 cfm range. I'm not sure where your neighbor came up with the other furnace model number, but apparently that isn't the one you need.

ryanhughes...
I'll pass this info on to my neighbor. Thanks for the info on the 400 cfm per ton.
Back to figuring out the units for my home. Just had another Trane contractor do his estimate. Got a much better price than other...about $3000 less! But nobody wants to do a Manual J. For the AC,he is going by what we already have, 5 ton. But for the gas furnace, which is a 167Kbtu, he is dropping it down to a 100Kbtu. He says the owner will come out and do a Manual J, if I ask. Well, I see what the next contractor does... Gary

Sometimes contractors won't do Manual J calculations until you accept their bid or they will do them and not give you the results for fear of being underbid, etc. Can you provide model numbers for this Trane guy's bid? It's important to know what you're getting--thermostat, equipment, lineset, ductwork modifications, etc...

ryanhuges...
I just started a new thread concerning my frustration on not being able to get a Manual J. Then I just saw your post above. And, also, no one can give me an EER for their setup. The look like deer-in-the-headlights when I ask!

I just got a new bid today that is significantly less expensive. Here are the specifics:
Condenser-4TTX5060 (XL15i; 5 ton; R410a) $3600 (4 ton is $250 less)
Gas Furnace-TUD100R9V5K (XV80, 2 stage) $3100
Coil-4TXCC060BC3HCA (21") $950
T-stat- Trane TCont 800 $225 (Might keep the one I have)
Aprilaire 2400 $550 (Might use my non-functioning Honeywell case with 4.5" MERV 10 pleated media)
Line Set-flush the existing 7/8" line.
10-year parts; 2 year labor.
They also won't pull permits unless I ask and it will cost $250 (which I will probably do). I can not find on the Web, any Product Specification on the XL15i. Got any links?
Thanks... Gary

What you are specifying above is a spectacular system, and I'd go for it if the price and contractor is good. If this guy isn't willing to do a Manual J, I would be a bit disappointed as well because that's the true way of sizing systems. It's important to have the right size, as you know, for humidity control, efficiency, etc... I do recommend the Trane touchscreen thermostat (TCONT802 or TCONT803--same thing as Honeywell's thermostat with a Trane logo essentially) or the Honeywell VisionPRO IAQ.

Here are specifications (rather technically detailed) for the furnace and air conditioner (I don't think you need coil specs):

http://www.trane.com/webcache/un/furnaces%20(furn)/product/22-1650-08_02012008.pdf - furnace
http://www.trane.com/webcache/un/split%20system%20air%20conditioners%20(ss)/product/22-1817-02_10012007.pdf - A/C

11.4 EER and 13.75 SEER for the 5 ton (once you get into those higher tonnages, achieving higher efficiency isn't as easy)
11.5 EER and 14.50 SEER for the 4 ton

ryanhuges...
Thanks for the links to the specs. I looked high and low for the A/C info but no luck. How did you find it???????
I was hoping the EER was at least 12. But it is way better than what I have now.... Thanks...Gary

Trane's commercial literature database:

http://www.trane.com/Commercial/LiteratureSearchList.aspx (I just type in the stem of the model number--i.e. 4TTX5.)