Updating the Controls in the Harman Pellet Pro II.

[Don2222]

Hello

Anyone try doing this? It works well once I got the manual feed adjust set properly.

Harman Pellet Pro II
Updated to work with new P61 Manual Circuit board and P61 Wire Harness. The combustion blower was also updated with the quick change housing and a new OEM Harman combustion blower with single paddle 4-3/4" diameter impeller blade. The Manual feed adjuster still works to adjust the feeder to avoid the 6 Blinks Status Error and to adjust for the quality of the wood pellets. In this case it is adjusted to 8 full turns to the left to prevent the 6 Blinks error so the stove works as it should. see video
It really cranks out the heat! The shop came up to 97 degrees F in no time flat!

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[Tim_M]

Do you know if this would work for an Invincible T? I think the Invincible was Harman’s successor to the Pellet Pro II, and I believe the controls are identical on the 2 stoves. My Invincible T has been working reliably as my basement heater for 8 seasons now. I had to have the board repaired a few years ago, sent it off to Brunners and it’s been great since. But I’m concerned that if another problem comes up I may not be able to repair it due to an inability to find parts.

 

[Don2222]

Do you know if this would work for an Invincible T? I think the Invincible was Harman’s successor to the Pellet Pro II, and I believe the controls are identical on the 2 stoves. My Invincible T has been working reliably as my basement heater for 8 seasons now. I had to have the board repaired a few years ago, sent it off to Brunners and it’s been great since. But I’m concerned that if another problem comes up I may not be able to repair it due to an inability to find parts.

Yes the controls are identical so it should work, even the auto board set to manual should work which is less money$

 

[Washed-Up]

Well done! what would the total cost of these modifications? I considered something like this before I found my P61

 

[Don2222]

Well done! what would the total cost of these modifications? I considered something like this before I found my P61

You might be able to use the P38 Control Board update kit because the circuit board has Dip Switches to set the circuit board to the P61 manual board.Howeve I am not sure how the circuit board mounting plate will fit in. You may have to trim it? I got the manual circuit board, manual wire harness and circuit board plate where the left side is bent up and that fit in there quite well.

 

[Shakenbake]

How is this system still working? I have a pellet pro ii and was considering getting rid of it but if this is a good fix I may try it.

 

[Washed-Up]

I’ve gone and looked at a PelletPro 2 that was for sale that had these mods done, worked like a charm and the guy selling it did the modifications 3 years prior.

 

[Don2222]

Hello
Works excellent but make sure you leave that big knob in there to manually adjust the pusher block. Normally once it is setup it is fine. But if it is not set right then a status error occurs and without the knob it would be much harder to adjust it. !!
So I left the knob in and it works really well!
All the other parts are easy to get.

 

[Shakenbake]

I just did a thorough cleaning of my pp2 and it seems to work well except for my distribution blower doesn’t change speeds. May be the board or the blower only thing I changed in the last 10yrs has been the probe and auger motor.

 

[JohnM45]

Don2222: Thanks for posting some great information and youtube video. I just purchased a Pellet Pro 2 on saturday. I think the distribution blower is needing replaced. It sort of tries to start and then after a couple minutes it gets up and running.

I can easily replace this, but if the issue is the control board, I'd like to see if you could outline a few details on what might be needed to change to a P61 board. I'm curious what the minimum thing needed would be: 1) P61 'manual mode' board 2) wiring harness? 3)red wire ESP sensor... 4) ?

Any further info on doing this project would be great - thanks!
John

 

[Don2222]

Ok John
The mods do not want us doing biz here.
What is your email and I will send the info.

 

[JohnM45]

Ok John
The mods do not want us doing biz here.
What is your email and I will send the info.

Doing business? I was just looking for a bit more information on what components you found necessary to change over to a P61 control board. I was not looking to buy or sell anything. For example, you mentioned you had to change wiring harnesses in your video you posted. Was that necessary because connectors were different or did you do that because the harness on your PP2 stove was damaged and needed changed?

I'm at [email protected].

 

[Rusty wrench]

Very interested in this, can I get some more info on what it took for parts to do this.

 

[Washed-Up]

Very interested in this, can I get some more info on what it took for parts to do this.

Classic new guy move...

Pics of the beast. I know the burn pot needs a cleaning! See how it has a newer control unit? Looks like the P43 control unit to me. Works fine in the stove.

www.hearth.com

 

[Rusty wrench]

So other than the control board what else has to be swapped out? Do you need a harness also?

 

[Washed-Up]

Private message Don2222, he’ll get you the details

 

[fulltilt54]

Ok John
The mods do not want us doing biz here.
What is your email and I will send the info.

Hi Don2222,
I'm a longtime lurker that has used this site to keep my Invincible T running for the last 15 years. I need to replace the circuit board in mine and saw that you had instructions on how to use a modern circuit board in these. I'll buy whatever one will work off Amazon/Ebay, but if I can get away with the cheaper board that runs in the p61a, that would be great. Thanks in advance, any advice on what to do would be appreciated.

I tried to message you through the site, but it just gives me an error.

 

[Shakenbake]

You might be able to use the P38 Control Board update kit because the circuit board has Dip Switches to set the circuit board to the P61 manual board.Howeve I am not sure how the circuit board mounting plate will fit in. You may have to trim it? I got the manual circuit board, manual wire harness and circuit board plate where the left side is bent up and that fit in there quite well.

Did we ever find out if this p38 kit works on the pellet pro ii? I am about to order it if it does.

 

[Don2222]

Did we ever find out if this p38 kit works on the pellet pro ii? I am about to order it if it does.

The P38 is only 43k BTUs where the Pellet Pro II is 55K BTUs so most people use a P61 circuit board and decal panel. That is what I used. The auto board is cheaper than the manual board and works just as well.

 

[Shakenbake]

So if I purchase all parts separate and not a kit what is all that is needed? Circuit board, circuit board plate, esp probe, room temp probe, wire harness, anything else that will be needed?

 

[Don2222]

So if I purchase all parts separate and not a kit what is all that is needed? Circuit board, circuit board plate, esp probe, room temp probe, wire harness, anything else that will be needed?

That should do it.

 

[Shakenbake]

One more question on this, do you have to crank in the feed block knob to shut off or leave it at 8 turns and just turn switch to off?

 

[Don2222]

One more question on this, do you have to crank in the feed block knob to shut off or leave it at 8 turns and just turn switch to off?

The pusher block has to be adjusted the number of turns in the original manual otherwise you get the 6 blink status error on the updated control panel.

 

[Shakenbake]

Old Blue is back alive! Control board upgrade seems like a success! I went with the p38 upgrade kit since it uses the same board as p61 now and It was one purchase with everything I needed.

 

[Washed-Up]

Well done, how long did it take roughly?