T2
In the Trades
Hey All,
I have a three unit apartment and last year I replaced my 25 year old boiler with a Prestige 110. During the overhaul I also replaced the base board with old cast iron radiators in two of the units. Recently I replaced the baseboard in the third unit with cast iron rad's. Absolutely love the rad's! The problem that I now have, is that one zone that has very low flow, and one is moderate but not what it was lat year. I believe there is air in the system and I have tried to purge it by isolating each zone, and flushing it, then bleeding the valves on the rads. I might add, that the first zone in the loop goes to the third floor and is still on baseboard, and I can not find a bleeder valve in the loop so I assume there is some air in there. Thing is, I never turn on the heat to third floor so it is pretty much isolated from the system. There is also flow in the problem zone, in each line, because I can get one line to respond by shutting off the others, it just drops when I start to open up the others.
I have attached a picture of the system. The first zone goes to the third floor. The second zone with 4 lines goes to the second floor and has good flow. The third zone with five lines goes to my first floor and is the zone that I am having problems with. The fourth zone goes to an in-law unit off the back house which is the zone I just revamped.
So the questions I have are several. How do I properly bleed this new system? When I did it yesterday, I had all the thermostats turned on and started out back and then purged the 1st, 2nd, and third floors. Then bleed them. While doing this the water pressure did drop and the boiler shut down do to pressure, which I got back by opening the regulator valve a touch, but I don't believe my procedure was entirely correct. The pressure on the boiler is now about 12 psi.
2nd, Do I have to put a bleeder valve on the third floor, or can it wait for the final overhaul?
Lastly, What is the best temp to run my rad's at for efficiency? Yes, that is loaded question. Last year I ran them at 120 and the place was the warmest it's ever been. I over sized on some the rad's. When we hit a cold snap I bumped it up to 150. Now, I know that is far to low for baseboard, hence the overhaul. The unit out back has two zones, one of which had two rads on it last year, the other had the baseboard in the loop. (long story)
That's where I am at. Any feedback would be gratefully appreciated.
I have a three unit apartment and last year I replaced my 25 year old boiler with a Prestige 110. During the overhaul I also replaced the base board with old cast iron radiators in two of the units. Recently I replaced the baseboard in the third unit with cast iron rad's. Absolutely love the rad's! The problem that I now have, is that one zone that has very low flow, and one is moderate but not what it was lat year. I believe there is air in the system and I have tried to purge it by isolating each zone, and flushing it, then bleeding the valves on the rads. I might add, that the first zone in the loop goes to the third floor and is still on baseboard, and I can not find a bleeder valve in the loop so I assume there is some air in there. Thing is, I never turn on the heat to third floor so it is pretty much isolated from the system. There is also flow in the problem zone, in each line, because I can get one line to respond by shutting off the others, it just drops when I start to open up the others.
I have attached a picture of the system. The first zone goes to the third floor. The second zone with 4 lines goes to the second floor and has good flow. The third zone with five lines goes to my first floor and is the zone that I am having problems with. The fourth zone goes to an in-law unit off the back house which is the zone I just revamped.
So the questions I have are several. How do I properly bleed this new system? When I did it yesterday, I had all the thermostats turned on and started out back and then purged the 1st, 2nd, and third floors. Then bleed them. While doing this the water pressure did drop and the boiler shut down do to pressure, which I got back by opening the regulator valve a touch, but I don't believe my procedure was entirely correct. The pressure on the boiler is now about 12 psi.
2nd, Do I have to put a bleeder valve on the third floor, or can it wait for the final overhaul?
Lastly, What is the best temp to run my rad's at for efficiency? Yes, that is loaded question. Last year I ran them at 120 and the place was the warmest it's ever been. I over sized on some the rad's. When we hit a cold snap I bumped it up to 150. Now, I know that is far to low for baseboard, hence the overhaul. The unit out back has two zones, one of which had two rads on it last year, the other had the baseboard in the loop. (long story)
That's where I am at. Any feedback would be gratefully appreciated.