What causes this kinda corrosion on these outside bolts of Pentair heater manifold case?
Heater bolts corroding
- Thread starter joepaiii
- Start date
A leaking heat exchanger. Virtually every time. Most likely, if you remove the manifold, you will find that the tubes that are supposed to stick out about 1/2" - 3/4" from the mounting plate are corroded away. Sorry.
Remove one bottom bolt to see if water pours out of the bolt hole.
How old is the heater?
How old is the heater?
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Why is the top line from the slide valve marked Backwash?
That line goes to the heater.
Is the valve and plumbing correct?
That line goes to the heater.
Is the valve and plumbing correct?
How long does that normally take? A few years ago in the Texas freeze my heater was accidentally on for a few days. I was debugging a HLS error and saw my bolts are all rusted on the manifold. Trying to figure out what happened.I doubt your heater was killed by bad water chemistry unless you used Trichlor tablets in a feeder.
I suspect corrosive condensation from cold weather operation did it.
Heater Condensation - Further Reading
www.troublefreepool.com
My prediction is if you install another MasterTemp heater and run it the same way it too will leak in about 4 years.
I think they just put a label up there. The real back wash line is on the bottom of the slide.
There isn’t a check valve between ic40 and the heater. Could that be an issue? It really looks like corrosion from chlorine to me. But I don’t know how it could be outside the manifold.
The bolts are toast. I am going to have to drill them out likely. So not trying to remove unless I am trying to replace the whole bottom manifold and heater core. I have never seen water leaking in that spot.
The bolts are toast. I am going to have to drill them out likely. So not trying to remove unless I am trying to replace the whole bottom manifold and heater core. I have never seen water leaking in that spot.
Probably not unless the cell ran with no flow and filled the heater with chlorine gas and hydrogen gas.
I think that you can probably get out one bottom bolt.
Any risk to waiting for it to fail by leaking without the bolts removed? Or should I be proactive in fixing it?
I would still like to understand what is happening that caused it. I try to keep ph in check it always goes to 8 and then I dose with acid to about 7.4. My chlorine levels have been running a bit high but my cya is usually 50-60. By high I mean 7-8. Still getting use to the pool and ic40 runtime percentages. I will check everything this weekend.
I would still like to understand what is happening that caused it. I try to keep ph in check it always goes to 8 and then I dose with acid to about 7.4. My chlorine levels have been running a bit high but my cya is usually 50-60. By high I mean 7-8. Still getting use to the pool and ic40 runtime percentages. I will check everything this weekend.
If the can fills up, the water is going to get into the blower.
Tap on the can to see if it sounds empty or full of water.
Tap on the can to see if it sounds empty or full of water.
The blower pushes the air/gas mixture into the flame holder and the heat goes through the heat exchanger.
If the heat exchanger is leaking, then the insulation is getting wet and the tub is rusting out pretty fast.
Note that the bottom picture is From a Jandy Heater, but the design is the same.
If the heat exchanger is leaking, then the insulation is getting wet and the tub is rusting out pretty fast.
Note that the bottom picture is From a Jandy Heater, but the design is the same.
Maybe excessive flow if you run the pump at full speed.
Maybe the heater ran with no flow?
Maybe an electrical problem causing excessive corrosion.
I don't see any obvious errors that would cause a problem or point to a diagnosis.
Maybe the heater ran with no flow?
Maybe an electrical problem causing excessive corrosion.
I don't see any obvious errors that would cause a problem or point to a diagnosis.
I took one of the bolts out and no water came out. Pump was off. Should that be done under pressure?
I didn't see any water coming out of the bottom hole. I tried one further up (that still could be turned) and didn't see water there either. I was running in pool mode which is a slower RPM (2200) vs spa mode. Maybe my spa mode is turned up too high? I did have it set near max (3100) trying to deal with an issue at one point. Maybe that's what caused the issue. I will have to see what the recommended speed is in the manual. Plus maybe watch the bolts with it set to spa mode and no heat.
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