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#1
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baseboards bled, but still no heat.
Ok guys I've been googling up the wazoo today to try to figure this out.
I have a two zone system, upper and lower. Gas furnace, one pump(Grundfos Type UP 15-42F), two valves(Honeywell V8048E), and baseboards. here she is: http://www.diezfamily.us/images/bs/AUT_2702.JPG I thought I had frozen lines but when I bleed the zones water flows just fine. So I followed the procedures to purge each zone and started the system back up. Well, I still only have heat to PART of the upstairs zone and no heat downstairs. I'm at a loss what to try next. The thermostats are working, the solenoids/valves are working, the aquastat is working, all manual valves are open, PSI is good(15). I can feel the pipes are nice and hot coming out of the furnace but they go into the concrete so it's hard to trace. Actually, downstairs there is a little in a baseboard about 4 feet from the furnace, but that's it. And, to make things even more fun.. the first floor pipes are in the concrete floor so I can't get to them or trace their exact route! grrrrrrr. I think this one warm baseboard is the first unit off the furnace.. Can it be my pump is dying and can't get the whole system flowing? The thing is so quiet I can't tell if it's on or off.. It's a Grundfos Type UP 15-42F, by the way. What else can I try??? Thanks, T-- (thank God for gas fireplaces!) Please reply to group.. I'm trying to remain spam-free. |
#2
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baseboards bled, but still no heat.
Diezmon wrote: What else can I try??? Thanks, How do you know the thermostats are working, you say you can't tell if it's off or on, (since it runs so quiet) You claim partial heat upstairs, could it be full heat upstairs? and you are missing the downstairs heat rising? I saw the picture, what a beast! my 2cents |
#3
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baseboards bled, but still no heat.
If you are sure that the zone valves are opening, check that you have 120
volts at the pump, if so and the problem isn't air in the line, it's possible that the pump is jammed internally or just dead "Diezmon" wrote in message ... Ok guys I've been googling up the wazoo today to try to figure this out. I have a two zone system, upper and lower. Gas furnace, one pump(Grundfos Type UP 15-42F), two valves(Honeywell V8048E), and baseboards. here she is: http://www.diezfamily.us/images/bs/AUT_2702.JPG I thought I had frozen lines but when I bleed the zones water flows just fine. So I followed the procedures to purge each zone and started the system back up. Well, I still only have heat to PART of the upstairs zone and no heat downstairs. I'm at a loss what to try next. The thermostats are working, the solenoids/valves are working, the aquastat is working, all manual valves are open, PSI is good(15). I can feel the pipes are nice and hot coming out of the furnace but they go into the concrete so it's hard to trace. Actually, downstairs there is a little in a baseboard about 4 feet from the furnace, but that's it. And, to make things even more fun.. the first floor pipes are in the concrete floor so I can't get to them or trace their exact route! grrrrrrr. I think this one warm baseboard is the first unit off the furnace.. Can it be my pump is dying and can't get the whole system flowing? The thing is so quiet I can't tell if it's on or off.. It's a Grundfos Type UP 15-42F, by the way. What else can I try??? Thanks, T-- (thank God for gas fireplaces!) Please reply to group.. I'm trying to remain spam-free. |
#4
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baseboards bled, but still no heat.
I know the thermostats are working because they properly turn on the system.
I've checked and double checked everything with the voltmeter as well. Can it be my pump is dying and can't get the whole system flowing? The thing is so quiet I can't tell if it's on or off.. I couldn't tell if the pump was working, or that's what I meant by the 'thing' no full heat upstairs.. It's hard to explain but each zone has two physical loops. The upstairs: About 3 feet from the furnace it splits at a T to these two loops to the upstairs. Then, they return to another T on the return loop, just before the furnace. One loop heats up perfectly, the other loop stays cool even though both are fully open... very weird. I _think_ I eliminated the possibility of blockage, since when purging the water flows freely. In the pic you can see the two loops for the downstairs(the taller two going into the concrete), and the return T just before returning to the furnace. The downstairs baseboards, also a single zone with two physical loops, stays cold. But, those two pipes coming out of the furnace, into the floor, are HOT. A beast? I was thinking it was pretty simple.. which is why I can't for the life of me, figure out the problem! Tim "wannabe" wrote in message oups.com... Diezmon wrote: What else can I try??? Thanks, How do you know the thermostats are working, you say you can't tell if it's off or on, (since it runs so quiet) You claim partial heat upstairs, could it be full heat upstairs? and you are missing the downstairs heat rising? I saw the picture, what a beast! my 2cents |
#5
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baseboards bled, but still no heat.
Yep, got 120 at the pump. My guestimate is that it IS the pump.. but how to
find out? Since the one loop always works fine, it's confusing the sh*t out of me The one loop that does work is located fairly vertically above the furnace, so I was wondering if it's just the heat rising up and through.. BUT the return is nice and hot too.. Tim "RBM" rbm2(remove wrote in message ... If you are sure that the zone valves are opening, check that you have 120 volts at the pump, if so and the problem isn't air in the line, it's possible that the pump is jammed internally or just dead "Diezmon" wrote in message ... Ok guys I've been googling up the wazoo today to try to figure this out. I have a two zone system, upper and lower. Gas furnace, one pump(Grundfos Type UP 15-42F), two valves(Honeywell V8048E), and baseboards. here she is: http://www.diezfamily.us/images/bs/AUT_2702.JPG I thought I had frozen lines but when I bleed the zones water flows just fine. So I followed the procedures to purge each zone and started the system back up. Well, I still only have heat to PART of the upstairs zone and no heat downstairs. I'm at a loss what to try next. The thermostats are working, the solenoids/valves are working, the aquastat is working, all manual valves are open, PSI is good(15). I can feel the pipes are nice and hot coming out of the furnace but they go into the concrete so it's hard to trace. Actually, downstairs there is a little in a baseboard about 4 feet from the furnace, but that's it. And, to make things even more fun.. the first floor pipes are in the concrete floor so I can't get to them or trace their exact route! grrrrrrr. I think this one warm baseboard is the first unit off the furnace.. Can it be my pump is dying and can't get the whole system flowing? The thing is so quiet I can't tell if it's on or off.. It's a Grundfos Type UP 15-42F, by the way. What else can I try??? Thanks, T-- (thank God for gas fireplaces!) Please reply to group.. I'm trying to remain spam-free. |
#6
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baseboards bled, but still no heat.
"Diezmon" wrote in message ... Ok guys I've been googling up the wazoo today to try to figure this out. I have a two zone system, upper and lower. Gas furnace, one pump(Grundfos Type UP 15-42F), two valves(Honeywell V8048E), and baseboards. here she is: http://www.diezfamily.us/images/bs/AUT_2702.JPG I thought I had frozen lines but when I bleed the zones water flows just fine. So I followed the procedures to purge each zone and started the system back up. Well, I still only have heat to PART of the upstairs zone and no heat downstairs. I'm at a loss what to try next. The thermostats are working, the solenoids/valves are working, the aquastat is working, all manual valves are open, PSI is good(15). I can feel the pipes are nice and hot coming out of the furnace but they go into the concrete so it's hard to trace. Actually, downstairs there is a little in a baseboard about 4 feet from the furnace, but that's it. And, to make things even more fun.. the first floor pipes are in the concrete floor so I can't get to them or trace their exact route! grrrrrrr. I think this one warm baseboard is the first unit off the furnace.. Can it be my pump is dying and can't get the whole system flowing? The thing is so quiet I can't tell if it's on or off.. It's a Grundfos Type UP 15-42F, by the way. What else can I try??? Thanks, T-- (thank God for gas fireplaces!) Please reply to group.. I'm trying to remain spam-free. With the solenoid valves open manually the pump may still not be called upon to start. You may only be feeling heat due to gravity fed convection of water in the pipes. With both valves open, the pump may not have the capacity to serve both zones, try closing one valve. Turn the thremostat up or down to see if you can hear a relay click in the heater or a difference in the pump noise or vibration. Sure sounds like the pump is not doing the job. You can check to see if AC is sent to it and you should still be able to tell if it is running by feel or by peeking in a vent hole in its case. Often the pump motor is connected to the pump impeller by a spring and arm mechanism. It absorbs startup shock when the motor kicks in but if the springs break, the motor will spin but the pump will be still. The pump motor and pump (impeller) itself should be considered seperately when troubleshooting because either can fail independent of the other even though they look like one unit. |
#7
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baseboards bled, but still no heat.
Are you sure you know how to bleed the system PROPERLY? An air pocket could account for one zone working fine and another one being cold. Well, when I bled each zone, closing its shutoff valve and opening the purge valve, the water coming out was solid and flowing. I let it run for a while, and then bled them again. And yes, I had the supply running. Tim |
#8
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baseboards bled, but still no heat.
"PipeDown" wrote in message Sure sounds like the pump is not doing the job. You can check to see if AC is sent to it and you should still be able to tell if it is running by feel or by peeking in a vent hole in its case. The pump motor and pump (impeller) itself should be considered seperately when troubleshooting because either can fail independent of the other even though they look like one unit. This sounds like the most logical explanation. Especially if it has been sitting inactive over the summer things like that tend to pop up at startup time. BTW, you don't have a furnace, you have a boiler. Furnaces heat air, boilers heat water. Using the wrong terminology will get nothing but disrespect if you go to the plumbing supply house for a part. |
#9
Posted to alt.home.repair
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baseboards bled, but still no heat.
BTW, you don't have a furnace, you have a boiler. Furnaces heat air, boilers heat water. Using the wrong terminology will get nothing but disrespect if you go to the plumbing supply house for a part. Thanks for the tip |
#10
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baseboards bled, but still no heat.
yep, I sure did.
"Commodore Joe Redcloud" wrote in message ... On Tue, 06 Dec 2005 01:55:42 GMT, "Diezmon" wrote: Are you sure you know how to bleed the system PROPERLY? An air pocket could account for one zone working fine and another one being cold. Well, when I bled each zone, closing its shutoff valve and opening the purge valve, the water coming out was solid and flowing. I let it run for a while, and then bled them again. And yes, I had the supply running. Tim Did you start at the highest and furthest from the boiler and work your way back? It makes a difference. Commodore Joe Redcloud |
#11
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baseboards bled, but still no heat.
I've never heard of shutting off a valve in order to bleed. I've always done
it with the valve open. -- Christopher A. Young Do good work. It's longer in the short run but shorter in the long run. .. .. "Diezmon" wrote in message m... Are you sure you know how to bleed the system PROPERLY? An air pocket could account for one zone working fine and another one being cold. Well, when I bled each zone, closing its shutoff valve and opening the purge valve, the water coming out was solid and flowing. I let it run for a while, and then bled them again. And yes, I had the supply running. Tim |
#12
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baseboards bled, but still no heat.
maybe we're getting our terms mixed up? I'm actually 'purging', which is
done from the boiler area. There aren't any bleed valves in any of the radiators of the house. You close the valve to centralize your purging to the zone you want to work on. so you're purging one zone at a time.. Tim "Stormin Mormon" wrote in message ... I've never heard of shutting off a valve in order to bleed. I've always done it with the valve open. -- Christopher A. Young Do good work. It's longer in the short run but shorter in the long run. . . "Diezmon" wrote in message m... Are you sure you know how to bleed the system PROPERLY? An air pocket could account for one zone working fine and another one being cold. Well, when I bled each zone, closing its shutoff valve and opening the purge valve, the water coming out was solid and flowing. I let it run for a while, and then bled them again. And yes, I had the supply running. Tim |
#13
Posted to alt.home.repair
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baseboards bled, but still no heat.
On Tue, 06 Dec 2005 01:28:47 GMT, "Diezmon"
wrote: Yep, got 120 at the pump. My guestimate is that it IS the pump.. but how to find out? Disconnect the power to the pump, and see if anything changes. If it doesn't, the pump's not working. |
#14
Posted to alt.home.repair
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baseboards bled, but still no heat.
On Tue, 06 Dec 2005 00:00:09 GMT, "Diezmon"
wrote: Ok guys I've been googling up the wazoo today to try to figure this out. I have a two zone system, upper and lower. Gas furnace, one pump(Grundfos Type UP 15-42F), two valves(Honeywell V8048E), and baseboards. here she is: http://www.diezfamily.us/images/bs/AUT_2702.JPG I thought I had frozen lines but when I bleed the zones water flows just fine. So I followed the procedures to purge each zone and started the system back up. snip I'll add my .02. Your circulator is on the return side, so one would normally suspect an air lock, especially with one zone (sort of) working. If I understand you, you: 1. Made sure makeup feed valve was full open. 2. Closed the shutoff on the return line of one of the zones. 3. Opened the drain valve on the inlet side of the circulator. This allows water to flow from the makeup feed, through the backflow preventor, through one of the zones, and out the drain valve. Flow was good and strong. 4. You repeated this for the other zone. If this is what you did, you pressure purged the system properly, and should not have significant air in the loops. If you are then still not getting circulation it is most likely the circulator. But you can try another thing first. I don't see a boiler drain valve in the picture, but I assume there is one there. Turn off the burner and let things cool a bit. Close the valve on the outlet side of the boiler. Repeat your purge but use the boiler drain valve instead of the one up on the inlet side of the circ. This will force water to flow through through the circulator and the boiler. If you still get a solid, forceful flow (not just the boiler draining, then it really is most likely the circulator. Shut it down, close all the valves, and drain the boiler down below the point where the circ is plumbed in. Remove the circ and bench test it. HTH, Paul |
#15
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baseboards bled, but still no heat.
snip
1. Made sure makeup feed valve was full open. 2. Closed the shutoff on the return line of one of the zones. 3. Opened the drain valve on the inlet side of the circulator. This allows water to flow from the makeup feed, through the backflow preventor, through one of the zones, and out the drain valve. Flow was good and strong. 4. You repeated this for the other zone. If this is what you did, you pressure purged the system properly, and should not have significant air in the loops. Yep, that's what we did for both zones. We did try one more thing to try to rule out air and/or a frozen line: We ran hot water through each zone, using the utility sink as our hot water source. I won't bore you with details of how we did it( unless anyone's interested ), but all baseboards are working properly, nice and hot. This also allowed me to verify where the piping goes in the first floor where everything is embedded in concrete snipped the rest I'm now convinced it's the pump, and picked a new one up today. Once I get the old one off, and prove that it's fried, I'll install the new one Thanks everyone for the prompt responses! Tim |
#16
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baseboards bled, but still no heat.
Some pumps, you can look in between the pump and the motor, and see if the
coupler is spinning around. -- Christopher A. Young Do good work. It's longer in the short run but shorter in the long run. .. .. "Goedjn" wrote in message ... On Tue, 06 Dec 2005 01:28:47 GMT, "Diezmon" wrote: Yep, got 120 at the pump. My guestimate is that it IS the pump.. but how to find out? Disconnect the power to the pump, and see if anything changes. If it doesn't, the pump's not working. |
#17
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baseboards bled, but still no heat.
"JJ" wrote in message ... On Tue, 06 Dec 2005 00:00:09 GMT, "Diezmon" Either you have a bad zone valve or your expansion tank is bad. Tell me about this expansion tank thing. Am I ever supposed to empty it? It has a fitting on it for a garden hose. |
#18
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
Kathy wrote: Either you have a bad zone valve or your expansion tank is bad. Tell me about this expansion tank thing. Am I ever supposed to empty it? It has a fitting on it for a garden hose. alt.hvac added (help us out here pros!) Hey you guys, that was a lady asking, tell us some more! I've already read quite a bit of misinformation in this thread, as I'm having the same problem with my Grundfos 15-42 F. It's darn cold, and I don't know if the pipes are froze, or if there is a blockage, or and air lock, or the pump is just gone. There is no vent hole, I've got no backup valves, the flow control valves won't turn manually, some kind of ancient TACO crap, frozen solid. The upstairs zone is going like gangbusters with the big B&G pump, but the downstairs Grundfos zone just quit, no flow, no hot pipes past the flow control valve, registers dead cold. The pump is running and I went out and got a little bleeder key, but where the hell do I start? I want to do it right. If I have to take the pump out, I'll have to drain the system, so I may as well put in an air scoop, backup valves etc, but maybe it could be something simple, like that air tank. Questions. If one zone is working, do I forget the air tank? How often do those old check valves freeze up? I notice there is a plug on the bottom, can I just remove that and clear it of any crap in there? Help us out pros! http://cosmic.lifeform.org |
#19
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baseboards bled, but still no heat.
On 19 Dec 2005 09:00:16 -0800, wrote:
Kathy wrote: Either you have a bad zone valve or your expansion tank is bad. Keep this **** in alt.home.repair. -- Click here every day to feed an animal that needs you today !!! http://www.theanimalrescuesite.com/ Paul ( pjm @ pobox . com ) - remove spaces to email me 'Some days, it's just not worth chewing through the restraints.' 'With sufficient thrust, pigs fly just fine.' HVAC/R program for Palm PDA's Free demo now available online http://pmilligan.net/palm/ |
#20
Posted to alt.home.repair
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baseboards bled, but still no heat.
Hey MF, are you having problems with the
meaning of alt.hvac, or just the pronounciation' of alt.hvac, or perhaps the spelling of alt.hvac? Or maybe you don't know how to use a filter file because you are just butt ****ing dumb. Let me guess, you're an american, no? |
#21
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
Newsgroups: alt.home.repair, alt.hvac
From: - Find messages by this author Date: Mon, 19 Dec 2005 17:29:02 GMT Local: Mon, Dec 19 2005 11:29 am Subject: baseboards bled, but still no heat wrote : Keep this **** in alt.home.repair Hey MF, are you having problems with the meaning of alt.hvac, or just the pronounciation' of alt.hvac, or perhaps the spelling of alt.hvac? Or maybe you don't know how to use a filter file because you are just butt ****ing dumb. Let me guess, you're an american, no? |
#23
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
wrote: On 19 Dec 2005 10:03:30 -0800, wrote: Newsgroups: alt.home.repair, alt.hvac From: - Find messages by this author Date: Mon, 19 Dec 2005 17:29:02 GMT Local: Mon, Dec 19 2005 11:29 am Subject: baseboards bled, but still no heat wrote : Keep this **** in alt.home.repair Hey MF, are you having problems with the meaning of alt.hvac, or just the pronounciation' of alt.hvac, or perhaps the spelling of alt.hvac? Or maybe you don't know how to use a filter file because you are just butt ****ing dumb. Let me guess, you're an american, no? Let me guess, you're a ****ing asshole, right ? No, I'm an american looking for information on both alt.home.repair and alt.hvac. You seem to be having some problems with that. Nevertheless, my problems remain, and my problem does't happen to be some wannabe usenet cop with a major chip on his shoulder and too dumb to use a usenet filter file. My problem is one of my zones is down, and my system is some kind of plumbing nightmare. Perhaps you were the one who put this piece of **** together, no? If not, then all you have to do is plug my handle into your filter file, and then let the adults get back to our business of hvac and home heating repair. http://cosmic.lifeform.org |
#24
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
wrote:
wrote: On 19 Dec 2005 10:03:30 -0800, wrote: Newsgroups: alt.home.repair, alt.hvac From: - Find messages by this author Date: Mon, 19 Dec 2005 17:29:02 GMT Local: Mon, Dec 19 2005 11:29 am Subject: baseboards bled, but still no heat wrote : Keep this **** in alt.home.repair Hey MF, are you having problems with the meaning of alt.hvac, or just the pronounciation' of alt.hvac, or perhaps the spelling of alt.hvac? Or maybe you don't know how to use a filter file because you are just butt ****ing dumb. Let me guess, you're an american, no? Let me guess, you're a ****ing asshole, right ? No, I'm an american looking for information on both alt.home.repair and alt.hvac. You seem to be having some problems with that. Nevertheless, my problems remain, and my problem does't happen to be some wannabe usenet cop with a major chip on his shoulder and too dumb to use a usenet filter file. My problem is one of my zones is down, and my system is some kind of plumbing nightmare. Perhaps you were the one who put this piece of **** together, no? If not, then all you have to do is plug my handle into your filter file, and then let the adults get back to our business of hvac and home heating repair. http://cosmic.lifeform.org don't listen to that moron, seems to think that alt.hvac is his private fiefdom. |
#25
Posted to alt.home.repair
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baseboards bled, but still no heat.
On Mon, 19 Dec 2005 18:40:44 GMT, yourname wrote:
wrote: wrote: On 19 Dec 2005 10:03:30 -0800, wrote: Newsgroups: alt.home.repair, alt.hvac From: - Find messages by this author Date: Mon, 19 Dec 2005 17:29:02 GMT Local: Mon, Dec 19 2005 11:29 am Subject: baseboards bled, but still no heat wrote : Keep this **** in alt.home.repair Hey MF, are you having problems with the meaning of alt.hvac, or just the pronounciation' of alt.hvac, or perhaps the spelling of alt.hvac? Or maybe you don't know how to use a filter file because you are just butt ****ing dumb. Let me guess, you're an american, no? Let me guess, you're a ****ing asshole, right ? No, I'm an american looking for information on both alt.home.repair and alt.hvac. You seem to be having some problems with that. Nevertheless, my problems remain, and my problem does't happen to be some wannabe usenet cop with a major chip on his shoulder and too dumb to use a usenet filter file. My problem is one of my zones is down, and my system is some kind of plumbing nightmare. Perhaps you were the one who put this piece of **** together, no? If not, then all you have to do is plug my handle into your filter file, and then let the adults get back to our business of hvac and home heating repair. http://cosmic.lifeform.org don't listen to that moron, seems to think that alt.hvac is his private fiefdom. **** you sideways. -- Click here every day to feed an animal that needs you today !!! http://www.theanimalrescuesite.com/ Paul ( pjm @ pobox . com ) - remove spaces to email me 'Some days, it's just not worth chewing through the restraints.' 'With sufficient thrust, pigs fly just fine.' HVAC/R program for Palm PDA's Free demo now available online http://pmilligan.net/palm/ |
#26
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
yourname wrote: If not, then all you have to do is plug my handle into your filter file, and then let the adults get back to our business of hvac and home heating repair. don't listen to that moron, seems to think that alt.hvac is his private fiefdom. It turned out to be a frozen pipe after all. Hopefully I haven't thrashed the Grundfos. It cost me $0.24 for a bleeder key at Ace. However, I am now an expert at hydronics, and I have all the .pdfs for my equipment. Well thanks everybody, you've all been great! It's so nice to know you gentleman are standing by to help us in our quest to better ourselves, here on the good old alt.hvac.worthless.trolls. Every newsgroup has a couple of them. This place is no different from the rest. http://cosmic.lifeform.org |
#27
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baseboards bled, but still no heat.
The expansion tank allows for just that, as the water is heated it
expands and needs somether to go so it expands into that tank. Notice the drain is at the bottom. |
#28
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
You're absolutely right lifeform1. Dickheads are certainly in evidence
in this newsgroup. No one really knows why this newsgroup is supposed to be for techs only, but apparently it is. Even though they're arrogant MFer's who trash all "home-moaners" who attempt to post here. I'm glad that you found your answer in this site, but I still think that it's full of prick lickers who enjoy felching each other on a regular basis. Yes, I know about this because one of your fags has ratted the rest of you out. I only hope to enjoy the fruit of my new technology heating post that will be forthcoming in the near future. |
#29
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
wrote in message oups.com... You're absolutely right lifeform1. Dickheads are certainly in evidence in this newsgroup. No one really knows why this newsgroup is supposed to be for techs only, but apparently it is. Even though they're arrogant MFer's who trash all "home-moaners" who attempt to post here. I'm glad that you found your answer in this site, but I still think that it's full of prick lickers who enjoy felching each other on a regular basis. Yes, I know about this because one of your fags has ratted the rest of you out. I only hope to enjoy the fruit of my new technology heating post that will be forthcoming in the near future. I am all for new technologies, too bad you have nothing better to do than to whine about NG trolls. Your NG reader came with a killfile(this is existing technology). When you learn to use it, the trolls will go away. |
#31
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
Nexus7 wrote: wrote: It turned out to be a frozen pipe after all. Thanks for posting the resolution to your issue and making Usenet a better place. Especially in spite of the circle jerk specialists of alt.hvac ("Apul", "Noon-air", "Bubba", "Oscar Lives", et al) trying Hmmm... that should be "Paul". And it doesn't seem like Noon-Air belongs on the list either. My apologies if you really are a good person. |
#32
Posted to alt.home.repair,alt.hvac
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baseboards bled, but still no heat.
Nexus7 wrote: wrote: It turned out to be a frozen pipe after all. Thanks for posting the resolution to your issue and making Usenet a better place. No problem. For those who are interested, here is my fault tree analysis. I took down all the ceiling panels to expose the piping, determined flow direction, etc. It's a one pipe system with diverter tees, so the radiators are basically paralleled up on the feeder pipe, but in sequence along the pipe. I started the pump, got my ear right down next to it to verify that it was indeed running, and then started bleeding a little water from each radiator, starting from the outlet of the boiler, where I assumed I had at least some positive pressure. The water ran clear and hard so basically there was no air, and all I was accomplishing was removing water from the system. I went along the entire path until I encountered a radiator that either did not produce a pressurized stream of water, or no water at all, and thus isolated my blockage in the main pipe. Then I went down and verified that there was an outside draft impinging on one of my diverter tees, hung a little electric heater from the rafters directed at that particular area, and inside of an hour I had flow again. The adding of isolation valves and an air seperator will have to wait until the next time I have to change out a pump. Actual solid blockage of scale or lime, or a bad pump, would have been a much larger job. I would have had to totally flush and purge the system. Whoever started this thread must have had a real battle on their hands. I feel your pain, really, but these are fairly simple systems that are well documented : http://www.bellgossett.com/ http://www.burnham.com/56000.cfm http://www.burnham.com/pdfs/layout.pdf There is lot's more good stuff out there. http://cosmic.lifeform.org |
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