Type: Posts; User: hobbit
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I just became aware of the Friedrich "Breeze" systems geared toward
the DIY market, which evidently come with a pre-charged lineset
and this wacky both-at-once quick connector with a big locking...
Am I allowed to ask this here? It's for another "theory"
clarification ... the various mentions that subcooling on
the indoor coil in heating mode would generally be greater
I think it's the drain because I saw a quick video the owner
had shot, showing the typical white PVC with a U-trap coming
out of the unit and heading away and water dripping out of
the box about...
Hopefully this doesn't tread too close to DIY but I've got some
friends who are in a pickle this warm Sunday evening and can't
get anybody in until tomorrow. They've got an a/c unit in the
Thanks for the responses so far! The end goal, really, is simply
determining whether to run my HP system on high fan or low fan
in heating mode, and have broader perspective on the advantages
In the tradition of my little headscratchers which are either
thought-provoking or totally stupid, I'm not sure which, here's
another theory question. This would be a purely heating scenario,...
Hopefully this doesn't tread too far toward DIY territory, but
I've got a little problem with a cold-air intake that someone
might have some insight into. You guys must deal with
beenthere, that's awesome; a quick look at a psych chart makes
it make sense, except that the chart I usually use only goes
down to 20F. Still, clearly not a whole lot of grains to be
had in air...
I'm aware of how the indoor and outdoor coils have to swap functions,
and even know exactly where my reversing valve is... what I'm trying to
understand is what happens to subfreezing *air* when it...
I've got a couple of general questions about heat-pump operation
in cold ambients. One practical, one more theory.
Most units either have a crankcase heater or use the inverter to
Swinging into heating season here, I'm wondering if it's better
to run a heat pump's AHU blower at a higher or lower speed?
While lower is better for summer dehumidification, if we're only...
Trust me, the second company will be who gets called next [unless
I have an actual warranty issue] but really, with periodic simple
care/cleaning that I can do myself I'm hoping to not have to call...
I don't know if it's better to follow up on a really old thread
or start a new one; I'll try it this way first.
I finally had another service company come out and eyeball my
Daikin setup and...
Yup, the Daikin FTQ type air handler. Quoting from the
install manual description for option block terminals 9,10:
"Receives input: Forced closure of indoor unit Electronic
Expansion Valve during...
I recently noticed that my air handler / indoor coil has a pair
of dry-contact input terminals to force its EXV to CLOSED during
When/why would you want to do this, and/or why...
I've run into what might be the first notable downside of a two-wire
digital 'stat interface, as opposed to the typical W1/W2/Y/G/etc bundle
of wires between a typical stat and an indoor unit. ...
That would all likely be true *IF* this rig had a traditional stat.
It doesn't. Daikin's big thing WRT control is two-wire data
links -- one two-wire shot to the stat, and another one from the...
It finally got warm enough again that I was able to get the coil loaded
up and try to take a CFM measurement. The filter slot opening is
about the same dimension as the main return duct, so I pull...
I did have that thought ... except that OAT can't be measured if the
outdoor unit doesn't have power anyway. The scenario I'm thinking
is indoor AHU powered, outdoor unit dead ... I should still...
This is kind of a general question and the specifics for particular
brands/units might be all over the place. I'm in New England, where
we have ice storms and weird "snowpocalypse" events and...
That's about what I was thinking, re: COP. The outdoor unit was
drawing all of 3 or 4 amps at 240V, less than a kilowatt for several
hours. This particular experiment went on fairly far into the...
No, this isn't about my "macguyvered" windowshaker-turned-dehum; that's
been put away for the moment because the real system is doing so much
better at water removal. So I've been studying that a...
Sorry, it probably came out a little wrong as can often happen in
email. And yes, the spam-filters are pretty strict over here, but
the rejection should have indicated something about why it...
Hmm. That's one of the issues, finding someone who is willing to
do all that due diligence. The guy who installed this rig for me
It probably seems like I'm going too hard on...
Okay, good to know about the PVE -- the Daikin doc never mentions
anything about oil type one way or the other, and I just assumed it was
POE. Having studied automotive coolant and brake-fluid...
In the process of fixing my flare leak (see the end of
my other thread ) my tech did something I thought was
... not necessarily impossible, but made somewhat difficult
on the newer systems. He...
Oh, and now the bad news. I just observed that the lineset
is leaking, right at the vapor-line flare nut.
My guy is back here tomorrow anyway, and I guess he's
going to have a bit...
Sorry, was away over a long weekend...
Outdoor unit is RZQ18PVJU9 inverter type,
indoor is FTQ18PAVJU upright ducted air handler,
remote-controller is BRC1E71 "Navigation" panel.
AHU will have...
Is it effective to throw in questions on a slightly different issue
onto an older thread? After playing with the system for a few
days now, I've found that the blower *always* runs when the...
I looked at bpi.org and it came up with a list of contractors
in my area which *all* say yes, they're certified for all possible
aspects, building-analysis, manufactured housing, heat/hvac ...
Unfortunately, the guy *is* the owner ... who offered the usual
sort of "been doin' this for a lotta years, it's fine" excuse. Yes, I
*did* ask before he started -- not really insistently, since...
Hi, back again with more on the Daikin install. This, by the
way, as kind of a sideways comment on the "inverter" thread,
is a 1.5 ton inverter-driven system with an upright air-handler
Nope, this is a fully *ducted* system with an upright AHU, and
while return-air sensing is an *option* the default place is in
the wall-mounted controller instead. So the stat is reading
My Daikin ducted split system is finally being installed, and
I noticed that the t-stat aka "remote controller" seems to be
reading a higher room temp than it actually is by close to
5 F. It's...
By *un*bending the condenser fan blades a little bit, I got the
airflow up to more like 160 CFM. At the volume in question,
that's a theoretical air change in a little over half an hour.
Yeah, where the moisture is going is what I can't figure out. DLZ --
yes, actually, absolute moisture content seems to have pretty much
stayed the same, maybe increased very slightly -- but at the...
I'm doing some dehumidification in a basement, whose air volume
I've figured at about 4540 cubic feet. I'm near sea level, so
I ballpark that as about 344 pounds of dry air. Temp started
I can control quite a few of the variables to a large degree as
a single occupant -- cooking, showers, plug loads, etc, and take
outdoor vs. indoor temps into account during data collection.
Hopefully this isn't too confusing a question. I'm interested
in measuring heat loss of an existing building, for its own sake
or comparison to a man J calculation. This is relatively easy
Well, I've done a little more reading, including an interesting
DOE paper comparing a SEER-13 fixed-output system vs. a SEER-21
variable speed one. Variable capacity with all the electronic...
I suppose that with enough tin work, one of the "concealed"
ducted units could be swung from the joists and adapted to the
existing system, but that doesn't seem like the right answer.
Just signed up, mostly with the idea of receiving some guidance
from the fine folks here. I've been poking around on the site
quite a bit before registering, and the info here even in the