Webasto

[JIM CHALOUPKA]

Is the Webasto wired such that the fuel pump and igniter will not run if the circulating pump does not run?
Or is it that if the burner is running and you don't feel heat at the register then look at the circulation pump?

Does the Webasto heat engine coolant directly, or through a heat exchanger, or does it heat a closed loop of its own?

Does full engine coolant ensure a full Webasto circuit, or must you check Webasto system water? If so where?

Will the Webasto fire up if the water is low, or empty? Do you need to worry about a possible meltdown in a dry system situation?

If you are running along and the engine is at opp heat, can you get heat out of the Webasto using it's fan and thermostat without burning fuel in the unit?
What I mean is does the engine heat the Webasto system in the same way the Webasto heats the engine?



These are theoretical questions of operation and safety

JIM

[dalej]

JC_Is the Webasto wired such that the fuel pump and igniter will not run if the circulating pump does not run?

DJ_The Webasto starts when one of the many thermostats call for heat or close.

JC_Or is it that if the burner is running and you don't feel heat at the register then look at the circulation pump?

That is correct, the pumps for circulation start when the section of the bus calls for heat. The burner will cycle quite often if the circulation pumps don't take the heated water away.

JC_Does the Webasto heat engine coolant directly,

DJ_Yes

JC_or through a heat exchanger,

DJ_No

JC_or does it heat a closed loop of its own?

DJ_Yes

JC_Does full engine coolant ensure a full Webasto circuit?

DJ_Yes

JC_or must you check Webasto system water. If so where?


DJ_No

Will the Webasto fire up if the water is low, or empty? Yes

Do you need to worry about a possible meltdown in a dry system situation? NO

If you are running along and the engine is at opp heat, can you get heat out of the Webasto using it's fan and thermostat without burning fuel in the unit? Yes
What I mean is does the engine heat the Webasto system in the same way the Webasto heats the engine? Yes


Keep in mind, I'm speaking of my 86 unit.

[JIM CHALOUPKA]

Thanks Dale.

I thought you had a 99, that would be the same as my 99, no. Yes!

JIM

[dalej]

Oh yea, that's right!

[JIM CHALOUPKA]

When I come to the bus and it is cold, I pres the button for the Webasto to light, and it does, but the fan in the bus immediately begins to blow cold air.

Is that the way it is in a bus or is there a time delay control that could be malfunctioning, something as found in house heating that prevents the fan until there is heat available to distribute.

[truk4u]

Jimmy C,

Mine have all worked that way unless you have the heat thermostat turned all the way down. When the Webasto is turned on, you have power to the thermostats and heat exchanger fans. Just turn all your thermostats down prior to turning on the Webasto and you won't have cold air blowing up your skirt.