โSep-10-2018 04:11 PM
โAug-09-2019 09:57 AM
โAug-09-2019 08:51 AM
oldave wrote:
Not sure what you mean by vacuum motor but there is no motor in the
black box . You are exactly correct , 12v operates an air valve ,
air is the passed thru the venturi to create vacuum as needed .
When done right the venturi is a terrific little devise but I suppose
the 12v pumps became so cheap and good where the black box probably
got more expensive so the bean counters won again .
โAug-09-2019 07:55 AM
โAug-09-2019 07:06 AM
oldave wrote:
Well lets update your Understanding.
1. RV Motorhome makes do NOT utilize Dash Air from the Auto Industry(including Monaco). They are supplied by companies that specialize in aftermarket Dash Air systems for the Motorhome market. Been this way for over 40 years. The only exception was the original 1979 thru about 1985 Silver sided Chevy Chassis Airstream motorhomes Class A
2. ALL DIESEL Dash AC systems use a 12 volt vacumm pump to supply the needed power to move the Air Damper doors when the Motorhome has a Vacumm activated system.
3. Most modern Diesels/Gas in the past 10 years or less use a Electric motor activated Damper door system Like a Denso system. I believe all Evans/tempcon use Vacumm systems. So, If you have Evans/tempcon you have a Vacumm system. Doug
Ok maybe not , guess I could have worded it better but some
components are plain old auto parts store stuff available most places
I can't say for sure but have been told my dash air control ( knobs etc ) are Ford .
As far as the vacuum pumps you are not correct when stating that they
are all elect . Monaco used an air through a venturi vacuum gen at
one time
Google will explain how it works . I located a picture of one on
a 2000 Windsor but couldn't post on here .
Maybe this link will work if anyone wants to see one .
http://www.irv2.com/forums/f115/vac-air-elec-box-above-generator-2000-windsor-403110.html
โAug-08-2019 10:59 AM
Well lets update your Understanding.
1. RV Motorhome makes do NOT utilize Dash Air from the Auto Industry(including Monaco). They are supplied by companies that specialize in aftermarket Dash Air systems for the Motorhome market. Been this way for over 40 years. The only exception was the original 1979 thru about 1985 Silver sided Chevy Chassis Airstream motorhomes Class A
2. ALL DIESEL Dash AC systems use a 12 volt vacumm pump to supply the needed power to move the Air Damper doors when the Motorhome has a Vacumm activated system.
3. Most modern Diesels/Gas in the past 10 years or less use a Electric motor activated Damper door system Like a Denso system. I believe all Evans/tempcon use Vacumm systems. So, If you have Evans/tempcon you have a Vacumm system. Doug
โAug-08-2019 08:14 AM
oldave wrote:rasuth wrote:
I have a 2001 HR Ambassador. The Evans Tempcon P/N on the molded plastic evaporator housing is the same as referenced, and also has cracks. I was able to find a couple of PDFs of a service and trading manual (the web link doesnโt have much other than a knowledge base with little knowledge). The Newmar training pdf has a schematic of a typical pusher install wth a vacuum pump and reservoir (troubleshooting guide points to this), but my install has a box with the 12= supply, the vacuum line to the reservoir and a red polyethylene line going to the back. Is there an option to get vacuum from the diesel? I didnโt think that worked with a turbocharged diesel. Anybody know?
Here is the way I understand our air cond .
Monaco used dash air from the autos industry .
These air conditioners used vacuum to control system .
You are right that diesels don't generate vacuum like gasoline
engines so we have to generate our own vacuum
They did this by 2 different ways , one is a box looking device
that has a ventura inside where air is passed through to generate
vacuum . More recently they use a 12volt vacuum pump , borrowed from
auto industry , Ford I think .
Mine is mounted above the generator on the firewall .
โAug-08-2019 05:24 AM
โAug-07-2019 07:07 PM
rasuth wrote:
I have a 2001 HR Ambassador. The Evans Tempcon P/N on the molded plastic evaporator housing is the same as referenced, and also has cracks. I was able to find a couple of PDFs of a service and trading manual (the web link doesnโt have much other than a knowledge base with little knowledge). The Newmar training pdf has a schematic of a typical pusher install wth a vacuum pump and reservoir (troubleshooting guide points to this), but my install has a box with the 12= supply, the vacuum line to the reservoir and a red polyethylene line going to the back. Is there an option to get vacuum from the diesel? I didnโt think that worked with a turbocharged diesel. Anybody know?
โAug-07-2019 06:45 PM
โAug-07-2019 06:04 PM
โSep-12-2018 02:45 PM
MSU Dog Hauler wrote:
When I asked the local RV dealers about working on it they all tell me they only work on the rooftop units and not the dash units, and push it off on the chassis manufacturer. This no-man's land / grey area stuff is so frustrating!
โSep-12-2018 10:18 AM
โSep-11-2018 03:15 PM
โSep-11-2018 09:07 AM