York RTU Nightmare

Printable View

Show 40 post(s) from this thread on one page

11-01-2012, 05:07 PM
slctech

When the RTU has horizontal duct you have to remove the top panel and inner HX panel to get to the primary and secondary switches. Real PIA.
11-01-2012, 05:10 PM
beenthere

Ask him if he found that sequencer inside the side discharge panel(back panel). If so he reset teh high limit, which will trip if you shut the disconnect off during a heat call with teh burner running.
11-01-2012, 05:19 PM
2sac

Quote:

Originally Posted by beenthere

Ask him if he found that sequencer inside the side discharge panel(back panel). If so he reset teh high limit, which will trip if you shut the disconnect off during a heat call with teh burner running.

You talking about the 3 wire limit correct?
11-01-2012, 05:32 PM
qwerty hvac

This was in the control panel with the contactors and relays. I know about the limit by the heat exchanger. That was the first thing I had suggested.

Sent from my iPad using Tapatalk HD
11-01-2012, 05:39 PM
beenthere

Quote:

Originally Posted by 2sac

You talking about the 3 wire limit correct?

yep.
11-01-2012, 05:49 PM
qwerty hvac

After looking at the wiring diagram I think he was talking about the ETD. Electronic Time Delay.

Sent from my iPad using Tapatalk HD
11-01-2012, 05:50 PM
2sac

I reread the post. Sounds like the initial problem is/was the crossover tube and/or clogged pilot orifice and/or spiders nest. This is why he had to light with a torch. Does this unit have the blue Johnson Controls ignition modules? Those are designed to have multiple voltage inputs for them to fire. Even though you have 24v at TH, if any limits are open the inducer will run but you will not get spark.
11-01-2012, 05:53 PM
qwerty hvac

Quote:

Originally Posted by 2sac

I reread the post. Sounds like the initial problem is/was the crossover tube and/or clogged pilot orifice and/or spiders nest. This is why he had to light with a torch. Does this unit have the blue Johnson Controls ignition modules? Those are designed to have multiple voltage inputs for them to fire. Even though you have 24v at TH, if any limits are open the inducer will run but you will not get spark.

He said they were grey boxes which means they were replaced. I think those are UEI boxes?

Sent from my iPad using Tapatalk HD
11-01-2012, 07:16 PM
2sac

Not familiar with UEI the Honeywell universal is grey, and I thought JC did make grey boxes at some point in time but I could be wrong.
11-01-2012, 08:06 PM
qwerty hvac

Quote:

Originally Posted by 2sac

Not familiar with UEI the Honeywell universal is grey, and I thought JC did make grey boxes at some point in time but I could be wrong.

I have one in my truck. I will check tomorrow and let you know the make. I know it's the JCI replacement.

Sent from my iPhone 4s
using Tapatalk
11-01-2012, 08:19 PM
valdelocc

Call P&J !! :) we fix it the first time!!:grin2:
11-01-2012, 08:43 PM
timebuilder

The JCI replacement is the black UEI box.
11-01-2012, 09:15 PM
qwerty hvac

Quote:

Originally Posted by valdelocc

Call P&J !! :) we fix it the first time!!:grin2:

That's funny this guy is from P&J and said he learned everything he knows from you. All kidding aside, I just wanted to get the kid some other thoughts on the issue since I knew I would probably not have time to go down and check out his issue. But he figured it out and learned a little from it.

Sent from my iPad using Tapatalk HD

Show 40 post(s) from this thread on one page