Keeping cold air up fron

[cfsomers@...]

I have an 81 fc35 on which the Chasis air does not fuction. Of course it
needs a belt which it getting here shortly. I am not a wiring person so
how do you add the relay in to get more power to the system?

Chuck
81fcsb35
Orange City FL


> I keep hearing that chassis airs are not producing enough cold air
> for owners of forward controls or for that matter thje PTs. Many
> owners have taken the compressors and condensers out entirely.
>
> I rebuilt the chassis air on the 1982 FC35 that I had including a
> compressor, air drier, evaporator fans and rewiring the circuits
> supplying voltage to the condenser and evaporator fans. Also
> recharged with R134a. Blew air at 39 degrees and the fans due to the
> increased voltage available to the fans blew what seemed to be twice
> as much air.. It produces more then enough cold air for the front of
> the bus even on the hottest days. The A/C compressor is a 10 cubic
> inch unit capable of providing a maximum of approx 47,000 BTU with
> R134a at the speed the compressor is turning, although the condenser
> size is limiting that some. If you need more air you can add another
> evaporator inside and a larger condenser on top. Remember your roof
> airs only produce a maximum of 15,000 Btus each.
>
> The main thing restricting the volume of cold air produced by the
> chassis A/C is voltage reaching the condenser and evaporator fans.
> Bluebird had the voltage routed thru the dash switches (same with the
> head lights) and the remoting of these switches using Bosch relays in
> the top solved this problem.
>
> tom warner
> Vernon Center,NY
> 1985 PT 40 (its chassis air is next)
>
>
>
> At 04:57 PM 7/25/2006, you wrote:
>
>>Just made a trip in our 7731FC and found a way to keep cooler than
>>before. We use the front roof air as the dash air doesnt do anything.
>>This trip we bought a clear shower curtain and used expanding window
>>curtain rods to hold it in place just in front of the hinge to the
>>bathroom door. We have a closet just across. Worked great to keep cold
>>air up there with us and we could see out the back window to keep watch
>>on the boat we were pulling. Hope this works for others as well.
>>
>>
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