Mainuh
Network Administrator
Greetings all,
I was tickled to find this forum after playing with my heating system several hours today. Thanks to Terry and moderators for hosting this!
I have a small cape cod style home with a Taco 007 circ pump and (4) 24v zone valves which are Taco 571-2 (the transformer was upgraded when the 3rd and forth zones were added). Prior to this problem, the system has run fine for years, with the zone changes being in 2002. My most used zone is the 1st floor and that zone valve was original equipment with the house, so is about 14 years old. When the first floor is calling for heat the first couple or rooms get a little warmth in their radioators, but it hardly seems to make it all the way around. When I force the zone open it eventually warms all the way around and you can feel the return get warm (but never really hot).
Thinking maybe the powerhead on the ZV was acting up, I swapped out that head with one of the others from which the zone was working fine. It still didn't circulate much until I hit the manual open lever.
I did some seaches on here and didn't find anything directly matching, but have a couple questions based on what I read from the searches and what I found while experimenting today:
1. I'm thinking the 571-2 base needs to be cut out and replaced. Is it common for these to be replaced or more than the powerhead?
2. I read in one search here about air in the system being a complete show stopper. But if I can over ride with the manual open level and get some hot water flowing would that pretty much kill the air in the system theory, or should I still try flushing it? I did flush all 4 zones in September.
3. when you use the manual open lever on the 571-2 does it open it as much as the powerhead?
4. Anyone have any other thoughts on what could be the cause? I'm picking up a 571-2 replacement tomorrow, but would hate to cut into the system and have to sweat it all if there might be another reason for this behavior.
Normally, I'd just call my heating guy and have him take a look, but got laid off a couple months ago and Christmas is approaching, so trying to figure this one out myself.
Thanks!
Don
I was tickled to find this forum after playing with my heating system several hours today. Thanks to Terry and moderators for hosting this!
I have a small cape cod style home with a Taco 007 circ pump and (4) 24v zone valves which are Taco 571-2 (the transformer was upgraded when the 3rd and forth zones were added). Prior to this problem, the system has run fine for years, with the zone changes being in 2002. My most used zone is the 1st floor and that zone valve was original equipment with the house, so is about 14 years old. When the first floor is calling for heat the first couple or rooms get a little warmth in their radioators, but it hardly seems to make it all the way around. When I force the zone open it eventually warms all the way around and you can feel the return get warm (but never really hot).
Thinking maybe the powerhead on the ZV was acting up, I swapped out that head with one of the others from which the zone was working fine. It still didn't circulate much until I hit the manual open lever.
I did some seaches on here and didn't find anything directly matching, but have a couple questions based on what I read from the searches and what I found while experimenting today:
1. I'm thinking the 571-2 base needs to be cut out and replaced. Is it common for these to be replaced or more than the powerhead?
2. I read in one search here about air in the system being a complete show stopper. But if I can over ride with the manual open level and get some hot water flowing would that pretty much kill the air in the system theory, or should I still try flushing it? I did flush all 4 zones in September.
3. when you use the manual open lever on the 571-2 does it open it as much as the powerhead?
4. Anyone have any other thoughts on what could be the cause? I'm picking up a 571-2 replacement tomorrow, but would hate to cut into the system and have to sweat it all if there might be another reason for this behavior.
Normally, I'd just call my heating guy and have him take a look, but got laid off a couple months ago and Christmas is approaching, so trying to figure this one out myself.
Thanks!
Don