Search: Posts Made By: longmian
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Replies: 23
Views: 14,657
Posted By longmian

Thanks, guys. Just did a little inspection...

Thanks, guys.

Just did a little inspection on the pipes. They are mostly copper, only the curved part going into the burner from the circulator is iron. So, not bad - I am afraid of threading on...
Replies: 23
Views: 14,657
Posted By longmian

NJ, the bleeder never sucks air in when the...

NJ, the bleeder never sucks air in when the circulator is not running. I can see water drips out from the tee under this circumstance.

When the second level and one or two of the lower level zones...
Replies: 23
Views: 14,657
Posted By longmian

Sorry that my calculation is off a lot, but I did...

Sorry that my calculation is off a lot, but I did hear and feel air sucked in - to assume negative pressure scenario.

Water "cold", I mean room temperature, around 60 F.

The house had around...
Replies: 23
Views: 14,657
Posted By longmian

I can confirm that there is air sucked in on the...

I can confirm that there is air sucked in on the second floor when I open the bleeder cap, and when only the top level is calling for heat.

As to the head loss, here is a rough calculation: From...
Replies: 23
Views: 14,657
Posted By longmian

You are right, xiphias. I have had air problem...

You are right, xiphias. I have had air problem for the last 5 years - my house generally heats okay otherwise. It is just the noise and the feeling that there is still air (quite some) in the pipe...
Replies: 23
Views: 14,657
Posted By longmian

I currently do not have air scoop in my system....

I currently do not have air scoop in my system. The Hy vent is mounted directly on the pipe that comes out of the top of the burner [ I believe Long means the BOILER here - ed. ]. The pipe also leads...
Replies: 23
Views: 14,657
Posted By longmian

Okay, now I understand xiphias's suggestions a...

Okay, now I understand xiphias's suggestions a bit better. My expansion tank is attached to a vertical pipe - there is no air eliminator (or air scoop?).

I am sort of telling myself to install an...
Replies: 23
Views: 14,657
Posted By longmian

Wow, you guys are throwing a lot of stuff at me -...

Wow, you guys are throwing a lot of stuff at me - good stuff.

Okay, here is the data. When system is cold, the pressure on the burner gauge is around 10 psi. When hot (around 180 F), it is a...
Replies: 23
Views: 14,657
Posted By longmian

Air in hot water pipes (worry free solution?)

Hi guys,

This site is really awesome. I've got most of my questions answered as I am trying to do it myself, thanks to all the people who are monitoring this site and others who are just...
Replies: 12
Views: 2,380
Posted By longmian

Problem solved

I replaced the Aquastat (L8124A/C) and the problem is solved. I am trying to get one as a backup.

Thanks to everyone for your help!
Replies: 12
Views: 2,380
Posted By longmian

Thanks, NJ. If I push on the relay arm, the...

Thanks, NJ.

If I push on the relay arm, the boiler fires up and the circulator runs - just as you expected.

In the controll box, the transformer (secondary) looks ok - just a little stuff melt...
Replies: 12
Views: 2,380
Posted By longmian

Controller transformer

Thanks, NJ.

When I said the line voltage between C1 and C2 is 0, I mean "0" all the time, even the boiler temperature is at 180 - above the LO (this is when the boiler shuts itself off). One thing...
Replies: 12
Views: 2,380
Posted By longmian

Controller transformer bad?

In this post:

http://forum.doityourself.com/boilers-steam-hot-water-systems/335600-taco-zone-valve-voltage-readings.html

NJ Trooper says when no zone is calling for heat, terminals 2 and 3 on...
Replies: 12
Views: 2,380
Posted By longmian

Purging air does not help

I am really puzzled. I did get some air out but it did not help much. The "dead" zone is still cold.

I attached the controller picture in my last post http://www.myagilent.com/Boiler_Control.jpg...
Replies: 12
Views: 2,380
Posted By longmian

Both are very good thoughts, David and gilmorrie....

Both are very good thoughts, David and gilmorrie. David: I will try to purge air again to see if it improves. gilmorrie: 1. For the zone that is not heating, the voltage is correct on the TACO...
Replies: 12
Views: 2,380
Posted By longmian

No heat in one zone

Hi there,

My house has a hot water heating system with a gas burner and one circulation pump (TACO 007-F5). It has 3 zones controlled by 3 separate thermostats (one upstairs, 2 downstars). A week...
Showing results 1 to 16 of 16


 
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