How the heck do you turn furnace on?

[R.Wold]

There’s another similar thread going on right now - at least you know you have a furnace.....

[Old-Biscuit]

Originally Posted by Goodspike

Or maybe home systems are different than RVs. I really haven't noticed mine, maybe it does turn on right away--there is a delay at the thermostat level when I do first turn it on. But home ones typically have two fans, and the main one doesn't kick on until the furnace has warmed up so that it doesn't blow cold air through the house.

Yes a residential furnace can have 2 separate motor/fans
ONE is the combustion fan...it comes on FIRST before gas to purge any accumulated fumes
Then after flame is established the Main Blower comes on to more heated air into house

RV Furnaces....
Have ONE motor with TWO air wheels
One combustion side and one room side
Motor starts FIRST to purge and supply combustion air
Then gas valve opens after sail switch closes allowing DC to circuit board for ignition sequence

[bpu699]

Well, it works...

Took a minute or longer to turn out, and to be honest, I was looking for air to come out the ceiling vents...

The floor vents didn’t cross my mind, and they are behind the drivers seat and in one bathroom... when running, you do not hear a fan. I do feel air blowing, that’s warmish...

Took an hour to get from 45 degrees to 62 degrees...

Suprised for such a small space it takes so long, but then again RV’s don’t really have a lot of insulation either...

I can’t imagine this thing working great in freezing temps...

Out of curiosity, how long does a 30 gallon propane tank feed a 35,000 btu heater?

[Old-Biscuit]

Originally Posted by bpu699

Well, it works...

Took a minute or longer to turn out, and to be honest, I was looking for air to come out the ceiling vents...

The floor vents didn’t cross my mind, and they are behind the drivers seat and in one bathroom... when running, you do not hear a fan. I do feel air blowing, that’s warmish...

Took an hour to get from 45 degrees to 62 degrees...

Suprised for such a small space it takes so long, but then again RV’s don’t really have a lot of insulation either...

I can’t imagine this thing working great in freezing temps...

Out of curiosity, how long does a 30 gallon propane tank feed a 35,000 btu heater?

1 gallon of propane has 91,500 btu
35,000btu furnace is per hour run time btu rating
Furnace will cycle ONCE inside temp is up to thermostat set point

*furnace not only had to warm up the room air but all of the furniture, cabinets, etc

[R.Wold]

Originally Posted by Old-Biscuit

1 gallon of propane has 91,500 btu
35,000btu furnace is per hour run time btu rating
Furnace will cycle ONCE inside temp is up to thermostat set point

*furnace not only had to warm up the room air but all of the furniture, cabinets, etc

When doing the math, remember that your tank is only filled to 80% capacity, so if it’s a 30 gal tank, you only have 24 gal when full. So about 62 hours, 44 min run time, give or take...

[Ray,IN]

Here goes; Our MH has 2 LP furnaces, the front furnace is connected to the thermostat for the basement heat pump. On the right of the thermostat is a switch saying electric or LP. When the switch is set to LP/propane only that furnace operates. When the switch is set to electric the LP furnace only comes on when the outside temperature is so low (34°-38°) the heat pump cannot maintain set temperature.
The rear furnace thermostat is in the bedroom and only controls that furnace, pretty straightforward. This furnace also heats the underbelly wet bay and water tanks.


Key to proper operation basement unit operation is keeping a clean air filter in the return air duct under the bed. I use Filtrette brand air filter due to having asthma, these require changing every 2-3 weeks they catch so much dust and dirt.



Here is the operation/service manual for the basement unit and thermostat: http://bryantrv.com/docs2/docs/rvp/6535heatpump.pdf
The sales brochure for our MH is the link in my signature. I have many more links to valuable information about our MH. Another member, AFChap has a newer model.

[bpu699]

Thanks guys, still trying to figure this thing out... next year is the first road trip. This year is just trying to make it as reliable as possible first...

[DancinCampers]

You should also have the motoraid option, which uses engine coolant to heat your hot water tank as you travel. You may also have an AUX heater which provides heat from the engine coolant to your floor registers while traveling. This would be in addition to your dash heater.

[vermilye]

Originally Posted by Mudfrog

The fan comes on first on ours. The flow from the fan causes the blower switch to close which then allows the propane to fire. Of course ours is old, things may be different with newer models.

Same for my 2017 Atwood furnace (blower switch = sail switch)...

[R.Wold]

Sail Switch! I was tryin to remember that term yesterday when about five new furnace threads popped up - you can sure tell its getting colder....Guess in late spring there’ll be a jumble of new AC threads...