Triangle tube prestige won't fire for central heat. Solved. Tri tube tech support is great.

CBRob

Doing some troubleshooting on a prestige solo 110
I can short out the TT and still get nothing.
The transformer inside the boiler is putting out 24 volts but I measure 50 volts in between the TT
I only measure 24 volts for the domestic hot water thermostat contacts.
Not sure what the heck is going on. Any suggestions on what to check

Jamie Hall

50 volts? Are there two transformers, by any chance? If so, you may have them out of phase. That will happily give you 50 volts, and about the only thing I can think of that would. If there are two transformers, they must be on the same electrical bus and must be wired correctly.

Wall wart auxiliary power for "smart" thermostats are common villains...

CBRob

I only see one transformer, it's the one in blue.
And since I've disconnected everything on the thermostat side, the 50 volts has to be coming from the triangle tube. The weird part is I can measure the voltage at the transformer and it's 24

Zman

This is going to make you crazy...

CBRob

> @Zman said:
> This is going to make you crazy...
> (Image)

I hope it's that easy.
I think it's been working up till recently,
The homeowner didn't fess up about making adjustments.

CBRob

Now that I think about it, the guy had 6 mtn bikes hanging from the ceiling blocking the boiler.
Might have had a tire pressing on the standby button...
I'll check tomorrow.
Thank you guys for the help

CBRob

Zman. I went back up to that house. You were right. Parameter 3 was set to 00 ie summer mode. One of those bikes leaned against the boiler while hanging from the ceiling must have been pushing some buttons.
I can't believe this guy's house didn't freeze,
It's been this way since October. It's 6° out right now and has been really cold this whole last week.
I think the only thing that was keeping this house from freezing was the domestic hot water on a recirculation pump.
Down here by the boiler room it was 55° upstairs it was 45

mattmia2

tt is only supposed to go to contacts on that boiler, right? so it is whatever the internal electronics drive it with. you might find it goes to nothing or some dc voltage if you put a 10k resistor across it

CBRob

Look at the hooks on the ceiling.

The more I think about it, seems like it would be really hard change parameter 3 to 00, and then hit store... With a bike tire.

I think the culprit might be a VRBO guest messing around.

Zman

All it takes is pushing and holding the "+" button when the boiler is in standby (normally it is). The bikes could have easily done it. I have seen several cases where the owner pushed the button for too long when going through the menu. I have done it accidentally myself.
Keep in mind that pushing and holding the "-" will turn off DHW.
This was a classic case of Triangle Tube creating a brilliant solution for a problem that never existed. Why would you want a feature like that and if you did, why would you make it so cryptic?