Dipswitch Function Harman Stoves

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F4jock

Minister of Fire
Nov 12, 2014
1,603
Red Rock, PA
OK gang, I'm going to list the general DIP switch functions for the Harman control board. If you would like I will be happy to give you the suggested settings for your model as settings vary depending on the model you have. Anyway, here we go.

#1 thru 3 - Auger feed time on cold start ignition. ON ON ON = 84 sec. ON ON OFF = 64 sec. ON OFF ON 43 sec. ON OFF OFF = 21 sec OFF OFF OFF = Program default.
#4 Power failure shudown. Factory set OFF
#5 ESP - OFF for any ESP but RED wires.
#6 Room Sensor Differential - ON for tightest setting. Different function for boilers.
#7 and #8 Max ESP temp. Model dependent.
 
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OK gang, I'm going to list the general DIP switch functions for the Harman control board. If you would like I will be happy to give you the suggested settings for your model as settings vary depending on the model you have. Anyway, here we go.

#1 thru 3 - Auger feed time on cold start ignition. ON ON ON = 84 sec. ON ON OFF = 64 sec. ON OFF ON 43 sec. ON OFF OFF = 21 sec OFF OFF OFF = Program default.
#4 Power failure shudown. Factory set OFF
#5 ESP - OFF for any ESP but RED wires.
#6 Room Sensor Differential - ON for tightest setting. Different function for boilers.
#7 and #8 Max ESP temp. Model dependent.
It would be helpful to include the part number for the various boards too. There are about 4 generations of boards out there and not all DIP settings carry over to the latest config
 
So what is program default? I have no jumper with mine so it's off off off...seems like too long
 
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Wait..I think I am looking at the wrong things
This is exactly why I don't recommend the "average" person mess with dip switches and draft settings etc. Harman boards don't like to be tinkered with unless one knows what they are doing....just my opinion.
 
This is exactly why I don't recommend the "average" person mess with dip switches and draft settings etc. Harman boards don't like to be tinkered with unless one knows what they are doing....just my opinion.
You're probably right I'm only a 30 year licensed HVAC tech and work with computers and digital controls for controlling building automation systems I'm probably not qualified....but hey..
 
You're probably right I'm only a 30 year licensed HVAC tech and work with computers and digital controls for controlling building automation systems I'm probably not qualified....but hey..
That makes you ABOVE average! No offense intended....
 
I have two PC45 stoves and have three board versions. Got the latest board last season when the consensus was that the board was shot and found the room temp probe was frayed at the spade terminals and making the stove run strange.
Dipswitch Function Harman Stoves
 
how about for a 2015 p68 and Accentra 52i,,same board ??,,I'd like to cut down the feed on start up, good info thanks , , I asked the installer he said he was factory trained but said he didn't know for sure if it could ..
 
View attachment 165612

I only have 3 jumper points ..no Dip switches.
The connector you are pointing to is where the Harman Diagnostic tool (DDM) is connected when needed. The dip switches are located on the back side of the board and you have to remove it from the stove to adjust them. The pic above is a PC 45 multi-fuel. Bioburner...is that a modification or does the board come like that?
 
Copy of upgrade page describing the dip switches too
 

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