back from a sunday under the bus.
cannot find removable panel to access 'basement' fan. Realized the back wall of the carpeted basement that runs lengthwise with the bus butts up against the slider 'basement', so you can see all along the outside of that wall without removing it by crawling under the bus and I don't see anything there by way of fan and very few wires and mechnicals for obvious reasons because the slider moves and the main trunk of supply to it goes up over the waste tanks into the bottom of the barthroom vanity.
the crossways wall with the water pump and generator/shore power relay with the waste tanks right behind doesn't seem to have any noticeable fasteners when i groom the carpet. the pump 'box' itself covers a 'window' in that partition from the waste tanks but I'm not sure what that is meant to acccess. By opening the passengers side hatch for the waste tanks i can see pretty well that there is no fan alongside the tanks in that area, or much of anything else. And there is pipe and plywood wire routing template hung from the frame above the waste tanks with continuous maybe 2" holes drilled in it which allows me to see across the top of the waste tanks into the center between the frame rails, and at least in that area below the frames don't see anything.
There is a very inconveniently located steel crossmember that prevents me from getting my head into the space between the frame rails at the back of the carpeted basement although I can stick a cellphone up there like a periscope and take a picture and didn't see the fan. I presume this large opening, about the height of the frame railes, maybe 12" is what is left on purpose to allow warm air to circulate to the water tank which is hung from the ceiling of the forward part of the carpeted basement and water pressure system at the back of the carpeted basement.
still interested in locating this fan if anyone can be more specific about it's location. I might be able to use a snake camera and/or make a designed access by cutting a portion of the basement wall if I knew where to cut.
as I said, this is just because I can't stand not being able to access stuff, but the fan is working. That, in a way, is part of the problem. At least during this cold season, it runs whenever the coach power is on regardless of whether the hurricane is turned on which seems a little odd to me. So I moved the lead from fan#3 to fan#4 for the time being which has no thermostat connected. I could put a cutout switch on the hurricane box for that fan or i could put a sensor inline that shuts it off unless there is warm water circulating to heating units. a few of the fan coils have these sensors, but they aren't hooked up. Again, knowledge of the system would allow me to operate this sensibly without automated switching by not turning up the thermostat until I know the hurricane is warm but automation is not a bad option for friends and family less familiar with the technical workings who might just turn up thermostat because they are cold, and blowing cold air around doesn't help at all, batteries or heat.
obviously i can leave this fan disconnected at the moment because the tanks and piping are drained. If it were parked outside with water in these systems i'd have to have some solution, either the hurricane or perhaps a space heater in the basement.
I'm also not clear since I can't find the basement fan whether there is an actual heating coil with it or it pulls air from the warmed cabin to the basement?
that's this weekend's novel. i will have pictures of the new exhaust next week. this copper union approach is working out perfectly and makes will allow hurricane to be easily removed for service, either just extended from the the vehicle by the length of the hoses which does allow access or disconnected for work on the bench from the hoses which would then require refilling/purging of this portion of the system. i'm contemplating the addition of unions (possible high quality brass hose fittings),,valves and purging ports to facilitate this for work on the hurricane or circulator pump while isolating the winter loop completely. (it does already valve off at one end in the heater compartment end, but not the other where it wyes in under the 'hood', i.e. at the front of the bus adjacent to the expansion tank.