Replyyou have a 12 seer 5 ton hp, with a 5 ton air handler, you'll need to get coil #'s to be sure you have a 5 ton coil. the ubhk is a var speed air handler which brings the efficiency to 13 seer.
Professional Member
I need to know what size this unit is... RBHC-24J11NFB Someone put a UPMD-060JAZ 13 Seer to it. In the Heating Mode the Suction side soars and then shuts down... I dont like to bash names but here in FLorida some big time company put this package together for the guy. I am going to either change out the condenser for him or the A/H, I know that the RBHK-25J11NFE goes with this Cond, However, I am just trying to figure out what size the A/H is and how they get the tonage on this.
Thanks.
Professional Member
you have a 12 seer 5 ton hp, with a 5 ton air handler, you'll need to get coil #'s to be sure you have a 5 ton coil. the ubhk is a var speed air handler which brings the efficiency to 13 seer.
Professional Member
is there a static collar?
Professional Member*
All I can tell you is that it is a 5-ton air handler I sell RUUD that looks like a Rheem #Originally posted by toyo066
I need to know what size this unit is... RBHC-24J11NFB
__________________________________________________ _______________________
Experience is a hard teacher because she gives the test first, the lesson afterwards" ~ Vernon Law
"It's what you learn after you know it all that counts." ~ John Wooden
"When the teachers become unteachable we're all in trouble" ~ Mr. Bill
"Remember "Pro" is only a name, it's not always a mindset determined to do everything correctly" ~ Mr. Bill
Professional Member*
Not needed on the RBHK, but airflow could be an issue, or may have wrong TXV in evap coil (ie... cooling only TXV)Originally posted by billva
is there a static collar?
Give us model of coil please.
Karst means cave. So, I search for caves.
BAD EMAIL ADDRESS PLEASE FIX
Wrong coil unless it has an RXCTCHJ TXV KIT. Will hit 12 seer w/ that. the "B" denotes a rcba6089g piston coil
i belong to peta ... people eating tasty animals. all my opinions are just mine.
Professional Member
oops. i misread, it is an rbhc. so a static collar is necessary. and is only 12 seer.
Professional Member
actually, it probably won't even hit 12 in a 5 ton model.
txv or not.
Professional Member*
It is not needed on the RBHC either.Originally posted by billva
oops. i misread, it is an rbhc. so a static collar is necessary. and is only 12 seer.
Read this http://www.hvac-talk.com/vbb/showthr...threadid=73336
Karst means cave. So, I search for caves.
Professional Member
okay, i read it. just can't figure out why the rheem/ruud engineers reqiure it.
no offense to the good doc, but what were his testing parameters compared to theirs?
100 cfm may not mean much at 1600 cfm, but means alot more at 800.
Professional Member*
LOLOriginally posted by billva
no offense to the good doc, but what were his testing parameters compared to theirs?
Karst means cave. So, I search for caves.
Professional Member
I'll leave the testing "parameters" out for now but lets just say a day was spent building various duct systems and testing each and every one of them.
I'm lost, his suction is soaring in heat mode... Could he mean discharge? If so, why not just actually read the airflow and determine if it is a problem? Use the temperature rise method and also look at the ESP. With the large air handler and heaters, you have to be careful with static. In this case a high static due to a marginal duct system may benifit getting that extra 100 CFM.
And moreso, why would you arbitrarily change equipment because of an undiagnosed problem? What are you going to do when you convince them to rip it out and then the "problem" persists.
The UPMD-060 will work with that air handler and just the same, that coil. While it doesnt specificly state the BHC, it frankly couldnt care less what the airmover is. An indoor TXV will not change anything but the efficiency and it will be lower than a rating they felt comfortable publishing. The installer probably sold the unit as a 13 SEER but only installed a 10 SEER, maybe 10.5 SEER system.
Professional Member
The guy sold him a 13 seer SUPPOSEDLY cond. I have not been out there as of yet but I am going out there this saturday. The A/C mode cools to about 57 degrees with an 18 degree split, however, when it goes to the heat mode he tells me that the suction side soars and within 5 min the unit shuts down on him and he has to hit the reset button. I dont know what the deal is because I have not been there yet. This guy had done it for a friend and now he is coming to me for advise. I just know that the air handler on ruud or rheems cannot really mix with other brands. I mean you can put a lennox cond on a rheem A/H and you will have the same problem. They dont go together, cooling will be ok, however, when it the heat mode your pressures are all screwed up. I was going to tell him to add the TXV but I was told that It would not matter. ????
Sir Ace says, Don't hate the breed, just the breeder!
Supports Wounded Warrior Project
Army Vet
Professional Member*
Rheem and Ruud are the excact same units, they come off the same assymbly line. The only differance is the stickers they get.
Karst means cave. So, I search for caves.
Professional Member*
Sounds like an overcharge. It is easy to do on this combination, especially from the sounds of the original contractor.
Recover some gas and see if the pressure drops. Sometimes these units have to operate for 20 minutes or more to stabilize and see the pressure increase, some techs won't wait when doing a start up.
Professional Member
without the static collar previously mentioned, you will always be overcharged in heat and then undercharged in cool.so when cooling season rolls around you will need to re-add refrigerant that you are now removing in the heat mode.
it's a vicious cycle that can be repaired, get the airflow of the system.
Professional Member
billva, with all due respect that may be the right thing it may not. Until someone reads the actual airflow, there's no sense in guessing.
Did I say read the actual airflow? Gasp.
Professional Member
WRONG LINE DRIER!!!!!
I went to check the unit out today and guess what I found on for a line drier???? A STRAIGHT COOL drier.... We took it off and what a surprising thing.... It was working like a charm.... Not to say that the freon was over charged just a bit but I guess they either did not know what to use as a drier or just plain dumb.... Like I said, I did not go out there until today so I was just going on what he said... FYI there is not static collar on it and it works fine... I did not check the air flow ( lack of tools going out) when I saw it did not have a bi-flow filter on it single direction instead I wanted to pop him in the head... SO that is one for the record to check for what type of line drier is on it if it is a new install....
Posting Permissions