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Posted by Geoman on May 11, 2007, 8:12 pm
> wrote:
>> 536cfm for a 3-6 ton system???
>> Who & How measured?
>> Was the system sized to heat or cool the 4100 sf?
>> Sounds like an airflow issue.
>> What's the temp drop/rise across the coil?
>> What's the pressure drop across the coil? Clean filter?
>> You should have around 400 cfm/ton as a rule...
>>
>> Now the wet questions:
>> GPM? GPM? GPM? GPM? GPM? GPM?
>> Temps & pressures drop across the coaxial tube heat exchanger?
>> (I'm sure those pete's plugs were installed on the inlet & outlet...
>> Gauges,
>> even better)
>>
>> Closed loop, open loop, pond loop system?
>> Vertical or horizontal loops? loop depths & spacing?
>> How many holes did you dig & how much tube is in the ground?
>>
>> Was/is the loop installer IGSPHA trained or certified, or even know what
>> IGSPHA is/does/stands for?
>>
>> www.waterfurnace.com/pdfs/products/SP1575.pdf
>> Here's the link for your unit specs (first link found on a google search)
>> It shows the units low speed air flow should be 1400 cfm & the high speed
>> should be 2200
>> I presume you have the proper airhandler & coil built for this system,
>> if so, reduct the entire system because a 14" round ain't gonna cut it.
>> Waterfurnace suggests/requires a variable speed unit with the 072 as
>> well,
>> and those are dependant on the static pressure of the duct...
>>
>> It sounds like it's never hitting 2nd stage, which would cause the
>> constant
>> operation at high & low outdoor temps.
>> If the 30dF is your design low temp, I'd question geo over airsource in
>> the
>> first place.
>>
>> good luck
>> geothermaljones
>> st.paul. mn
>>
>>
>>
>>
>>
>> > My house is 4200 sq.ft. My installer installed a EZ072 split heat
>> > pump. 3 zones. We have had problems from the start. My total Duct
>> > leakage Corrected to 25Pa is 536 CFM's. This is after he corrected
>> > my problems? My supply is 14'' round. Return is 9x16 . The unit
>> > never stops at 30F or above 85F. We have been in our new home 1
>> > year. I've had another Waterfurnace dealer, do a blower door test,
>> > and two load cal.
>> > which said we needed a 4.1 ton at 1940 cfm. Waterfurnace has been no
>> > help. The State inspectors can't get our problem fixed.
>> > Any suggestions?- Hide quoted text -
>>
>> - Show quoted text -
>
> The 536 cfm is duct leakage from a flow hood test , I had done. I have
> a closed vertical with 2000 ft. total loop. The Intellizone is set
> at 1850 max cfm's as the installor claimed to the inspectors. The air
> handler is not listed as a matching unit, a York 5 ton which the
> installor changed the motor two a 1 hp? I have had a lot of questions
> which he acts like I'm a nut, Why did'nt you install air handler
> which is recommended. Why is the line set differant than listed in
> the manual. Why is my hot water heater 75 feet from the unit. And why
> don't my system work right. Our installor has installed hundreds of
> these units. Waterfurance is all he installs.
> Thanks,RT
Like I said the installer was a hack, 100% crap for an installer.
No wonder WaterFurnace doesn't care about your problem, its not a matched
system approaved by ARI. You have a six ton unit with a five ton condenser,
14 " duct that can serve only a 2.5 ton AC. THEN he puts in a 1HP fan motor
which does nothing but run up the electric bill.
Sorry Kjpro, but 14" round duct for a six ton unit doesn't work. As to the
loop, forget about it at this moment, your duct system, its design, the
mismatched equipment all spells tearing up all the walls in the home to
correct this system. To do it correctly will cost almost double after you
consider the cost of fixing up your home after they tear out the inside
walls to gain access, the cleaning of it, and THEN it probably wont work
correctly when this is done.
BTW, if a few of these hackers end up in court just MAYBE we can keep them
out of the trade.
I'm sick of hack jobs, I see them and quote against them just about every
day...
>
>
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