Replace Roof AC units - 1992 WB40

[mbrund]

Well because Dometic Tech Support is so bad, and the fact that I
could not get anyone to really tell me what I had to do with the
Thermostats (could I convert the wiring etc., which I know I can, but
the techs are clueless), I purchased 2 Carrier Heat Pumps which have
the sensors in the lower units and hand operated remote controls.

I will replace both forward AC's and put new lower units in as
well.

My current lower units are plywood wrapped with vinyl and I can not
see how they are attached to the ceiling. I can find the two
forward AC bolts in the return air side, but I thought there are two
that would be located in ducted air side as well. But I can not get
the lower unit off to see or get to them. Yes I can remove the metal
grill that holds the air filter in, but that does not let the lower
unit come down.

Now that I had to purchase new lower units for the Carrier I can man
handle them if I have to because if I destroy them it does not
matter. But I would rather not do that. Guess I will call Jessie at
BB and see if he can tell me how they are attached.

Michael Brundridge
1992 WB40
Georgetown, TX




--- In WanderlodgeForum@yahoogroups.com, Pete Masterson
wrote:
>
> My inside covers are plastic -- and the screws holding them are
> reachable inside after you remove the 'return' screen.
>
> While the Dometic Penguins are low profile (and probably exact
> replacements for what you currently have) you might consider the
> Dometic Brisk-air "High Efficiency" units. I replaced 2 of my 3
> Penguins with these units. They only draw 10 amps (each) instead
of
> the 15 amps of the Penguins. The Dometic brand will work (usually)
> work with the Dometic thermostats (if you have that arrangement)
and
> simplify the wiring necessary.
>
> The downside is that the Brisk-Air units are several inches
taller,
> costing you some clearance. On my coach, the King Dome is already
> taller -- so the Brisk-Air units didn't really affect my clearance
> anyway...
>
> The high efficiency units are slightly more expensive than the
> "normal" units -- but you may appreciate being able to run them
when
> available current is limited -- it just gives you that much more
> margin when using a 30 amp connection, etc.
>
> Pete Masterson
> aeonix1@...
> '95 Blue Bird Wanderlodge WBDA 42'
> currently at Chief Hosa, Colorado
>
>
>
> On Jun 10, 2007, at 11:10 PM, mbrund wrote:
>
> > Well I lost another roof AC unit (cracked copper tubing, again),
so
> > that's it, I am going to replace them now.
> >
> > How do you get the lower unit cover off (these are the stock units
> > that came from BlueBird, so they are the vinyl covered lower
> > covers)?
> >
> > I can not seem to figure out how they are attached so I can get
to the
> > two rear most bolts through the AC unit.
> >
> > Still debating between the Dometics or Carrier units. Probably go
> > with Penguins so I don't have to change a bunch of wires. But I
will
> > be stuck to what I can get this week as we go on our trip starting
> > next weekend.....
>