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shophound> They may be thermally happy, but are they pleased with their utility bill?

FPL (the local utility) monthly bill average for 6 months prior to installing the new ductless heatpumps,...

cost came in a half price vs. comparable whole house dehu. installation was a snap compared to installing the dehu.

recently a couple building two new houses asked me for an alternative to whole house dehumidifier or running room dehumidifiers. this is in s.florida where we've had unseasonably cool couple weeks,...

> it's a 4 ton, 2.5 year old Trane, the house is approx. 2600 sq ft

it's *WAY* oversized, guess you did not comprehend my reply as I live in your vicinity under similar temperature and humidity...

since I also live in s.florida, it's unusual to read someone keeping the tstat at 75F and can only assume you have no control over your indoor humidity (RH%) and that your system does not have...

have a chance to see my first R744 system installation this weekend, plan on installing several depending on how this 1st setup goes

bobRichie:
>that recent digital thermostats have been programmed to
>delibrately lie to us!

do you have the ability to adjust the display accuracy, up or down? I've done this to all installed...

They all use an electric expansion valve, which is located in the outdoor unit.
It is controlled by the outdoor circuit board.

The true liquid line is not accessible unless you take the entire...

my comment relates to mitsubishi and fujitsu (but likely same end result) systems.

pressure test appears to have less value than pumping system down, verifying 400-500 microns holds without leaks...

on the mitsubishi and fujitsu units I've usually pumped system down, verified 400-500 micron (no leaks), weighed back in the factory charge +2 ounces. be careful to make allowance for suction line...

Climatouch makes a tstat that responds to a 2% change in RH.

Example:
RH setpoint 50%, the 24vac DH relay opens at 52% and remains open until RH is 48%, total deadband range 4%.

No other...

ok, finalized yet another mitsubishi installation and (of course) the very 1st thing the customer proceeds to run is dry mode operation (very humid environment)

it looks as if the unit simply...

it really would help if *only* the indoor unit would turn off fan when cycle is complete, ie. *not* running in "fan always on" mode

> Is the air coming out of the inverters always cold?

no as the inverter controlled compressor comes on at very low revolutions based on feedback from the indoor control board, satisfies setpoint...

this happens universally on all my recent installations, even using just 9000 BTU full inverter models, all using the lowest fan speed setting (also tested on Auto)

the compressor barely comes on...

just verified with two other Fujitsu installations, that this condition appears universal with minisplits.

there must be some moisture taken back, copiously, from the wet evap coil with perpetual...

Subject line is really a question, as I've received a number of inquiries about the constant circulation of the indoor unit (it runs perpetually, even when setpoint temperature is reached) while in...

after watching the operation at an installation, what is the reason the mitsubishi turns on the "Powerful" mode LED while running a DRY mode operation?

The first LED signals "Power is ON", the...

sdgrease,

now that you've made the decision, allow me to tell you my experience.

I live about 4 hours south of you, essentially same climate but perhaps a bit more humid on the coast and...

regenerative latent heat pump, up to 40 seer

Luis-Pasco wrote:
>My house is 2200 sq feet 2 story

I cool and heat 2400sq ft further south of you in FL, using just 2 tons 99% of the time. Only when OD>90F does my system occasionally run using...

am installing two more mitsubishi ductless systems this week and one client asked (after reading the manual), how does Dry mode work?

I took a look at installation manual and then the end user...

regis101 wrote:
>Any jobs over there?

am looking for a pool boy, must have the body of David Beckham

regis101 wrote:
>... a 1200 sq ft home at 100K and 3 ton.

yup, just for a quick comparison, I cool/heat a 2300sq ft house with just a 2ton compressor while I do have a dual compressor system and...

hvac_superman wrote:
>.. and replaced it with a Supco cap tube type dryer

one one hand you wrote not to use and then you tell us you installed another type anyway?

liquid line is of course...

what's the consensus in using dryer(s) on mini split systems? I've found units lasting much longer if line dryers are used, despite some installation manuals (ie. daikin) mentioning *not* to install...

mystery solved.

there are 2 separate panels which slide out, the air cleaning filter goes on the bottom/inside of the larger panel, snaps into place in an almost invisible area, demarcated by tiny...

installed a mitsubishi ductless for a client and can't figure out where the Air Cleaning Filter is installed (see image)

there are two large screens that slide out from both sides of the cover...

ok, I'll bite at it with my trane xl19i vs experience.

mine is like a platypus taking off from the bottom of the stream, slowly but steadily and stealthily.

next animal anomaly.

for me, the Climatouch CT 07 TS 32H does a 1-minute up to 59-min separation of stage 1 vs stage 2

you can also override it via 0-minutes which means only stage 1 runs (great for hurricane recovery...

for your part 3, that's an interesting point.

you are saying that while system was running stage 1, the separate DH/RH relay was turned on with it's own independent signaling to Y1 - correct?
...

click here and select link for manuals

after the job is done, report back. we're all hoping the "...Two techs will be out next Monday to do the install ..." are made of the same mold.

second opinion wrote:
> ..in the process of compiling a list for training on Tstats that can give a dehumidify comand without cooling.

Climatouch CT-07-TS32-H

it's available with perhaps the...

kellyr24 wrote:
>the green/blue controversy..

then of course there is Climatouch with it's grey/black/white/night-time-reverse display. I've found older clients like it better than any colored...

I've see a nokia demo on this in connection with a smart house system. the person keyed in a code into his cell, while driving home from the office. by the time of arrival, house was warmed up...

one of the local contractors gave me a test model of the new Climatouch to see how it performs with my XL19i

as S.Florida has been extremely rainy and humid recently, I wanted to see how this new...

indoor

http://www.funpic.hu/files/pics/00032/00032669.jpg

http://www.funpic.hu/files/pics/00029/00029861.jpg

http://img.photobucket.com/albums/v442/iftk/17/10_podborka_36.jpg

take a look also at the AED Climatouch model CT07TS32H

Carnak wrote:
> Everyone seems to be thinking about having one for short standby periods. I am talking about the inevitable big one in hurricane prone areas, where the infrastructure gets taken out....

> Does anybody make a central A/C system for residential use that's designed to gracefully limp along when powered by a non-gargantuan (sub-15kW) generator?

I use a 5.5kW honda to run 1st stage...

you had a J done and exceeded it by .5, it should be no big deal. for some anecdotal evidence, all my installations in the last 6 months were done by downgrading without exception by .5 and a few...

Payson wrote:
>I tried to explain that a 2 stage t-stat only calls for the SMALL compressor unless it goes 2 degrees or more above set point and that once it cools within that 2 degrees, it goes...

While it is possible to run both separate Dehu and AC equipment, I would assert that it is a waste of resources and unnecessary.

Here's how I've solved it for myself and installations I've done...

> had the coil cleaned once in the four years

bingo!

Derailer wrote:
> The humidity dropped below 50% to as low as 47% @ 75F last two evenings; however by morning the humidity is higher than before (up to 57% RH @ 72F )

I see you were already...

in these 4 years since the original install, how many times and at what intervals was the evaporator coil cleaned?

what type of filter is used, what merv rating and how often is it changed?
...