Webasto install HDJ81

[DamoPeru]

I had a read through the thread and saw some mention of auto control, mufflers and running the cab heater fan from another source. I don't know about webasto, but my Espar Hydronic comes with an optional timer to start automatically at a certain time every morning, and I got the muffler and heater fan dual control so the factory blower can be run from an auxiliary battery automatically when the hydronic is operating.

Noone has mentioned here the issue with using these in the mountains, they don't work so well at altitude. I also got an altitude compensator kit with mine, but even that doesn't allow proper use over a couple of thousand meters... I can't remember of the top of my head right now but I'll edit the exact rated altitudes when I get around to it.

 

[DanS HJ-45]

Noone has mentioned here the issue with using these in the mountains, they don't work so well at altitude. I also got an altitude compensator kit with mine, but even that doesn't allow proper use over a couple of thousand meters... I can't remember of the top of my head right now but I'll edit the exact rated altitudes when I get around to it.

Interesting. Since I live at about 9,000 feet (3000 meters) this is definitely something I need to look into. Time to go look through all the webasto spec sheets...

Dan

 

[DamoPeru]

Interesting. Since I live at about 9,000 feet (3000 meters) this is definitely something I need to look into. Time to go look through all the webasto spec sheets

It's just like a mechanical diesel pump on a non-turbo, if you tune for 0 meters it will run rough at 3000m. I just checked the Espar high altitude compensator manual and it says it will continue to adjust the fuel pump until 3000m. If webasto don't have similar accessories (i'm sure they do), just go the espar.

 

[Douglas S]

The Webasto heaters can be adjusted for altitude, there is no kit as far as I am aware.

 

[DamoPeru]

The Webasto heaters can be adjusted for altitude, there is no kit as far as I am aware.

So you have to adjust manually? That would suck for touring into higher elevations! The compensator kit I mentioned for the espar adjusts automatically, but if you don't travel outside your home elevation then I guess you don't need it once it's tuned correctly.

 

[Douglas S]

So you have to adjust manually? That would suck for touring into higher elevations! The compensator kit I mentioned for the espar adjusts automatically, but if you don't travel outside your home elevation then I guess you don't need it once it's tuned correctly.

Certain models compensate automatically. Not sure which ones, or how. It's not a factor for me.

 

[DamoPeru]

Certain models compensate automatically

that would be much better than the espar hydronics, i had to pay more for that accessory feature.

 

[IanB]

Got my brackets fabbed up and powdercoated, should get the rest of the install completed shortly. We were able to use all pre-existing holes, so it's completely removable without a trace if I wanted.

 

[DanS HJ-45]

Very nice Ian!

What sort of control are you going with? Just the switch from Webasto? A Smartemp FX? A remote of some flavor?

Does your harness have a fan control wire coming out of pin 4? Or are you not going to worry about turning on a fan while it's heating?

Dan

 

[IanB]

Very nice Ian!

What sort of control are you going with? Just the switch from Webasto? A Smartemp FX? A remote of some flavor?

Does your harness have a fan control wire coming out of pin 4? Or are you not going to worry about turning on a fan while it's heating?

Dan

The plan is to trigger it off my 2-way Compustar remote start's aux button, I'm hoping it will even confirm the Webasto fired, but I have some reading to do to confirm this is possible. I do plan on running the HVAC fan off it as well, but again, I have some reading to do here, and confirm as you've pointed out that my harness is equipped to do so. More details to come in the next few weeks.

 

[DanS HJ-45]

The plan is to trigger it off my 2-way Compustar remote start's aux button, I'm hoping it will even confirm the Webasto fired, but I have some reading to do to confirm this is possible. I do plan on running the HVAC fan off it as well, but again, I have some reading to do here, and confirm as you've pointed out that my harness is equipped to do so. More details to come in the next few weeks.

Cool. I've spoken with Webasto tech support a few times, and frankly I'm amazed that this isn't something built into their controllers. Seems simple to me: If heater is making warm coolant, and temperature is below a certain point--then turn on a fan. Then, when the cabin gets warm enough the fan can shut off, and regulate the temperature that way.

I'm thinking of that feature for camping inside the truck, more than for defrosting though. For defrosting I would just run the fan continuously, and if it got too hot by the time I got back to the truck I'd just open a window for a few minutes or something.

I'll post up more of my Webasto Install once I've got it done and working, but that may be a few months yet...

Dan

 

[rideglobally]

this is interesting, read the thread quickly. some questions; which model of Webasto are you using? my engine is a 12ht. does the Webasto work with truck engine off. can this set up can replace the OEM heater.

 

[DanS HJ-45]

this is interesting, read the thread quickly. some questions; which model of Webasto are you using? my engine is a 12ht. does the Webasto work with truck engine off. can this set up can replace the OEM heater.

Most of us are using the Thermo Top C. Also known as the TSL-17. There are other comparable models though. Eco Pro, Evo, etc.... But in the US market it's the Thermo Top C for 12V trucks.

Yes, the Webasto works with the engine off. It's main purpose for most of us is to heat up the coolant in the engine (and thus the engine) for much better starting when it's real cold. The ability to also warm the cabin a bit is just a bonus.

It does not replace the OEM heater, but it warm the coolant which allows the truck's heater to work and put out heat even before the engine is started.

Dan

 

[IanB]

I sat down and read through the TSL-17 manual last night, couldn't find any reference to tieing into the HVAC to trigger the fan. So I guess that's not possible with this model? Or it's something you need to rig up on your own somehow?

 

[rideglobally]

Most of us are using the Thermo Top C. Also known as the TSL-17. There are other comparable models though. Eco Pro, Evo, etc.... But in the US market it's the Thermo Top C for 12V trucks.

Yes, the Webasto works with the engine off. It's main purpose for most of us is to heat up the coolant in the engine (and thus the engine) for much better starting when it's real cold. The ability to also warm the cabin a bit is just a bonus.

It does not replace the OEM heater, but it warm the coolant which allows the truck's heater to work and put out heat even before the engine is started.

Dan

i will use it mainly to heat up the camper/cabin. i called webasto they suggested this model air top 2000ST Webasto: Air Top 2000 ST any thought. i don't want to high jack this thread, if i am i will start another. thx

 

[IanB]

i will use it mainly to heat up the camper/cabin. i called webasto they suggested this model air top 2000ST Webasto: Air Top 2000 ST any thought. i don't want to high jack this thread, if i am i will start another. thx

Ya, that would be the unit you'd want to heat the cabin over the TSL-17, which is to heat the engine coolant.

 

[DanS HJ-45]

I sat down and read through the TSL-17 manual last night, couldn't find any reference to tieing into the HVAC to trigger the fan. So I guess that's not possible with this model? Or it's something you need to rig up on your own somehow?

When I spoke to Webasto Tech support, he said it was a common feature, but not sold that way in North America for some unknown reason. Either way, they can get you the pin and seal so that you can add that pin (pin 4) for that. It's a very low current control--I will almost certainly use it to control a relay.

Dan

 

[IanB]

When I spoke to Webasto Tech support, he said it was a common feature, but not sold that way in North America for some unknown reason. Either way, they can get you the pin and seal so that you can add that pin (pin 4) for that. It's a very low current control--I will almost certainly use it to control a relay.

Dan

Found some info on Webasto's website, looks like they sell an IPCU (Intelligent Programmable Control Unit) add on to accomplish the HVAC blower motor function.

Document # PI102BC

 

[DanS HJ-45]

Found some info on Webasto's website, looks like they sell an IPCU (Intelligent Programmable Control Unit) add on to accomplish the HVAC blower motor function.

Document # PI102BC

Interesting. I have not found all the documentation, but it looks more special that just a relay to control the fan. I should dig through the PC diagnostic stuff to see if you can set a cabin temperature for the IPCU to maintain...

Dan

 

[SHREDwagon]

Hi Damienperu - My hydronic works fine above 3000m. Just loosen the fuel pump bracket, rotate up 15 deg and re-tighten. For the Airtop 2000 "high altitude" kit, I used a second dosing pump in tandem. Never had a problem heating the bunk near 4000m at Cotopaxi. This was recommended to me by a fellow overlander (Pawsontour) and everything worked fine few times using It in The Andes. So the second fuel pump should work for the hydronic too. I know the altitude kit is $$$$. Surprised it's not working properly.....