OTR fresh air inlet?

[JIM CHALOUPKA]

Paul, would you please post a picture of the valve of which you are speaking.

Is it the one on the side of the bus?

JIM

[Joe Cannarozzi]

Jim it is not a valve it is a damper and it is at the 3rd bay door drivers side behind that 8 by 5 opening in that bay door. The bay with the OTR evaporator and heater core.

It is the equivalent of recirculate or fresh air control on your car a/c but it is manual and is a far cry from being completely sealed up when closed.

[jack14r]

I modified Jdubs coach to eliminate all outside air,I also modified my 08 coach by drilling out the pop rivets and installed a aluminum panel to inhibit outside air from entering the system.On a hot day with some outside air mixing with the bus air the bus air temperature will only be 60- 65 degrees with 100% recirculation the bus air will be 10 degrees colder.On a 100 degree day in the south I can maintain 72 or less in the coach with the bus air.

[JIM CHALOUPKA]

OK, got it. That's the opening Liberty recommends to be closed all the time.

Never mind the picture Paul. I just wasn't sure where and what you were talking about.

JIM

[jkbriggs]

On mine, it appears to be controlled by an air-actuator type valve thingy (not manually). Are you saying this should be disconnected and flap closed/sealed? Also, I have a humidity control in that same bay that is set on +40. Any info on that gadget would be appreciated.

[Joe Cannarozzi]

On ours we have an 1/8 inch gap all the way around the damper and with the vacuum created by the thrust of those two big blowers all kinds of humid outside air will be sucked in. The consensus is that any air that is allowed to leak in at this point will hurt the performance of the A/C and that is no good. Right ED?

A humidifier is usually only required in the winter I would turn it down or off in the summer.