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Does anyone have the software for the older simplicity boards and older Lennox L-series units?

This makes sense because when I jumped R to Y1 on the terminal it ran circuit 1 compressor and when I jumped R to Y2 it ran circuit 2. Great information. Thank you.

I tried cyclng it through test mode by shorting the pins because I too was curious. It did the same thing. I have an approved blower motor replacement for the site. When I return for the repair I...

Is that a wooden post cap attached to the house that the piping passes through?

I have a signal generator like some of you guys. I jave no idea how to wire it though. If I'm in a ceiling and I want to test a actuator with 4-20mA signal from my signal generator, how and from...

Hey everyone,

I love this app, however, I'm having a hard time learning to use it to its full potential on packaged RTUs with more than one stage of cooling. Does anyone have any tips on how I...

Thanks for the email.

That's right. I used resistance to bring on first stage cooling, but second stage came on.
So I thought I would try to short out the test terminals and try the auto-cycle test. Same thing. ...

Same thing when I test directly on the board.
The RTRM has R-Y1-G-Y2, etc. along the bottom right. When I jumper R to Y1 or Y2 the proper circuit runs. That's why I was curious if it's a known...

If I need to replace R22 with a drop-in and the unit has a non-adjustable txv, how are we expected to dial in the superheat? Has anyone run into this issue?

I read an article once that discussed how circuit setters are only needed when the valve is two position. If a 3 way valve is modulating the circuit setter doesn't need to be there. It seems to...

I worked on a 10 ton Trane Precedent today. When I applied a 4.7kohm resistance on the test terminals circuit #2 cooling energized. When I applied a 6.8kohm resistance circuit#1 cooling energized. ...

Does the United States have low numbers in the trade? Where I am located in Canada the trade seems to be saturated with techs.
How do you receive a free copy of the RSES Journal?

Anyone have any recommendations on books to learn about chillers. I have a little experience, but would consider my knowledge to be basic. I would prefer books that are for beginners and work my...

I suggest to the customer to replace these with two pole whenever I see them. They are commonly used for the condenser fans on York units.