Second AC unit

[richard waters]

> A couple of weeks ago I took possession of a second AC unit for my 76 PB
> from another 76 PB (thanks again Henry and Irene!). So I'm wondering if all
> of these 76 PB's were wired with the necessary connections for a second AC
> unit in the rear? Mine only has the original AC unit up front and the
> 2-speed fan vent in the rear. Will I have to remove the headliner to find
> out?
>
> GaryB

Gary,
I had my '76 PB headliner out last Summer and I can tell you that
there was no 110 VAC prewiring or anything for the 2nd AC in
my coach. With the headliner down there shouldn't be any trouble
running a cable to the location of the A/C however. All that was there
was the 12 VDC for the vent fan.

Of course redoing the headliner is another project itself. One that I
wouldn't take lightly again now that I've done it.
Richard Waters '76 PB, Troy, MI

 

[tim dawson]

On my 1976 Eleganza-II, I had sigle air, but there was a 110V outlet on the
ceiling just in front of the vent. Turns out that the rear A/C circuit was
dropped in this plug, and it was a simple matter (about 10" or so) to extend
it to the A/C unit.

- - Tim

> Hey All;
>
> A couple of weeks ago I took possession of a second AC unit for my 76 PB
> from another 76 PB (thanks again Henry and Irene!). So I'm wondering if all
> of these 76 PB's were wired with the necessary connections for a second AC
> unit in the rear? Mine only has the original AC unit up front and the
> 2-speed fan vent in the rear. Will I have to remove the headliner to find
> out?
>
> GaryB
> 76 PB in Ca
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
>
>

- --
================================================================================
Tim Dawson (tadawson) Owner/Engineer
TPC Services Bellnet: (972)-221-7385
Lewisville, Texas 75067 FAXnet: (972)-221-0393
"The world is complex. Sendmail.cf reflects this...."

 

[al chernoff]

My coach had 120v wiring on both the front and the rear.... real easy to get
power in the front or the back.
al

> Hey All;
>
> A couple of weeks ago I took possession of a second AC unit for my 76 PB
> from another 76 PB (thanks again Henry and Irene!). So I'm wondering if all
> of these 76 PB's were wired with the necessary connections for a second AC
> unit in the rear? Mine only has the original AC unit up front and the
> 2-speed fan vent in the rear. Will I have to remove the headliner to find
> out?
>
> GaryB
> 76 PB in Ca
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com

 

[travism]

> My coach had 120v wiring on both the front and the rear.... real easy to
get
> power in the front or the back.
> al

The original brochures for the 1978 coaches mentions that if you don't order
the roof air conditioners factory installed that you can order the wiring
for them; my inference is that is that there's no way to know whether a
particular coach has the wiring except to go look...

Look at "Available Equipment" on
http://gmcmotorhome2.homepage.com/1978%20GMC%20Motorhomes/1978%20Models16.ht
m for "air conditioner prewire."

Look also at
http://gmcmotorhome2.homepage.com/1978%20GMC%20Motorhomes/1978%20Models13.ht
m where you find this mentioned again directly beneath the picture of the
Onan generator, "Speaking of appliances, should you decide to add a
roof-mounted air conditioner after you buy, you'll be happy to know that
available pre-wiring will make installation easier."

Travis...been studying these coaches for a long time; now it's time to buy
one...

 

[the hamiltons]

Gary,

I have a 76 Eleganza and it was not wired for a rear roof air. I ran a
double 12 gauge wire from the circuit breaker panel because the nearby
outlet was only wired with a double 14 gauge wire. Also if you look on page
23-8 of the GMC parts book Item 6 is a Reinforcement - Roof Air Conditioning
Opening and my coach didn't have it. I had an "H" shape reinforcement made
that matched the front roof air reinforcement, it slide into place, and is
held with large pop rivets.

Al Hamilton
Kingston, Ont

 

[henry davis]

>Hey All;
>
> Thanks for the info regarding the installation of the second AC unit in
> my 76 PB. I didn't know that I was going to have to remove the headliner
> in the back in order to add some reinforcement.

You may not have to. Chances are that your PB came with the required
bracing in place. If the 110V was not wired originally, you can probably
take a drop off the 110V outlet that is in the front of the AC opening.

On my PB the framing in the rear is that same as the framing in the center
- - but 110V was not present in the rear.

Henry

> Looks like a job for later in the spring when the rain stops.
>
>GaryB
>76 PB in Ca.
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>