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Old 02-18-2014, 04:52 AM   #61
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Loud noises from one zone of Hot water heating system


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Originally Posted by hpyjack2013 View Post
you're lucky the water didn't drain from the boiler and crack it. for the sake of 35.00 valve?????
More like because the installer didn't install the require LWCO(low water cut off).

Or at least I don't see one.

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Old 02-18-2014, 06:36 AM   #62
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Loud noises from one zone of Hot water heating system


I don't think I've ever seen a low water cut -off in a forced hot water residential heating system???? I've seen them installed in commercial occasionally ( mostly because of insurance companies). Seen them installed a plenty in steam heating systems.
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Old 02-18-2014, 03:36 PM   #63
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Loud noises from one zone of Hot water heating system


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I don't think I've ever seen a low water cut -off in a forced hot water residential heating system???? I've seen them installed in commercial occasionally ( mostly because of insurance companies). Seen them installed a plenty in steam heating systems.
IMC has required them since at least 2003. Many states don't follow the code though. Here, all boilers have to have them since 2005.
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Old 02-18-2014, 05:41 PM   #64
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Loud noises from one zone of Hot water heating system


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IMC has required them since at least 2003. Many states don't follow the code though. Here, all boilers have to have them since 2005.
I always thought it was just commerical and multi-family ,thanks for the update.
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Old 02-19-2014, 08:18 AM   #65
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Loud noises from one zone of Hot water heating system


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Originally Posted by dvaupel View Post
The arrow on the back of the circulator is in the direction that goes in to the boiler. .
IF this is truly the case then the zone valves are indeed installed backwards.

Let's just get this straight to confirm though....

The pump flow is in the direction of the boiler (the arrow on the pump is pointing toward the boiler)?
The zone valves are on the OTHER main line coming from the boiler (not the pump line)?
The arrows on the zone valves are pointing to the boiler?
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Old 02-19-2014, 11:56 AM   #66
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Loud noises from one zone of Hot water heating system


I think the OP stated that the pump is plumbed so close to the boiler that the back, where the pump's directional arrow is, is not visible. Only way to determine which way the pump is pumping is to turn both stats all the way down and let the system cool off to room temperature. Then with one hand on the line to the pump and the other on the line to the zone valve, have someone turn one thermostat up and see which side gets hot first.
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Old 02-19-2014, 03:04 PM   #67
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Loud noises from one zone of Hot water heating system


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Originally Posted by Bob Sanders View Post
Let's just get this straight to confirm though....

The pump flow is in the direction of the boiler (the arrow on the pump is pointing toward the boiler)?
The zone valves are on the OTHER main line coming from the boiler (not the pump line)?
The arrows on the zone valves are pointing to the boiler?
That is all correct.

Circulator -> boiler -> zone valves (with arrows pointing back towards boiler)

An Update: The company that did the installation is sending out a tech early next week to take a look. I can keep you all posted on that.

And one question to confirm a theory that may have gotten lost. I think it was hpyjack that had proposed one possibility for why these noises only happen on the basement zone....Since the basement zone is 3/4" piping and the upstairs is 1" piping, is the smaller diameter piping more prone to vibrations and weird noises?
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Old 02-19-2014, 03:26 PM   #68
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Loud noises from one zone of Hot water heating system


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You said it still made the noise after you changed the motors. How did you make it happen? or what was happening or wasn't happening with the other zone valve circuluator, water system in house at the time. You may have to pull up a chair and spend some time watching this thing.does the nosiue alwys sound like it's in the same spot in the basment heating zone? is it located at the boiler or away from the boiler? Is it in the heating element? t only happens when the heat shuts off correct? it's a single bang or thump?
Forgot to answer some of these (in case it's helpful)

-After swapping motors, I just left both zones on. A few hours later, same loud thump/bang and then some pipe rattle. Some times when it happens, it's more of a thump. Others it's a louder bang. I believe the other zone was on at the time.

-The noise does always sound like it's in the same spot (right under our bedroom). It's not directly at the boiler, more sounding like it originates 10-15 feet away. Then some of the pipes in the basement shake. From my experience thus far, it only happens when the basement zone shuts off.

I was able at one point to stand next to the valve as it was shutting off and the noises happened. The valve closed slowly, there was a slight 'farty' noise (not sure how else to describe it), then the thud and shaking.

For my own curiosity...It looks like these valves operate by rotating a flap/stopper around an axis that is off to the side of the path of the water. Does this sound pretty standard?
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Old 02-19-2014, 04:21 PM   #69
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Loud noises from one zone of Hot water heating system


Correction to above post....

-The upstairs zone is not necessarily active when this issue happens. I was just doing some further testing, and with the upstairs zone closed, the basement zone did it's close/thud thing.
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Old 02-27-2014, 10:17 PM   #70
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Loud noises from one zone of Hot water heating system


Alrighty...I have an update after a few days of the system running since the tech came.

Note: As best I knew how, I had purged the system of air, but like I said, I'm still a bit new to this type of system.

As the tech was looking at things, the direction of valves didn't concern him. What did concern him was the fact that the expansion tank was completely empty. His assessment was that the sounds were caused by air in the system, and that the air in the expansion tank was pressurized and forcing air back in to the system.

Everything's been running for a couple days now and haven't heard any sounds like there were. There is still a slight noise when the basement zone valve closes, but it's only noticeable when you're right next to the boiler.

Thanks to all for the input in sorting this out. Sorry that my lack of experience led to a run-around with it all...hope that's not frustrating to any of you as contributors.
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Old 02-28-2014, 06:27 AM   #71
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Loud noises from one zone of Hot water heating system


Is the same tech who put them in backwards????? another reason for an automatic fill valve

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