djdavenport
Member
We have radiant floor heating with a condensing combi boiler with three zones. Zone valves. The circulator is a Taco 007e I put in about a year ago. I've got the ODR curve dialed in pretty close such that, during the coldest days, the boiler loafs along, often all day. It's been working great.
I apparently have one of the first generation 007e's (with the old firmware) and it is programmed to go into "econo" mode after 12 hours of continuous operation (signified by the green LED). What I notice is that when it does, my delta tends to really shrink. Typically, on a day like today (14 degrees this AM), supply is about 118 and return is about 102--that's in non-econo mode (orange LED) and everything is totally groovy. Today, with the same outdoor temperature but in "econo" mode, we've got about 115 supply and 107 return. We still seem to be keeping up okay, but worry that if being in "green" mode throttles down the flow somehow, we might get behind. Then, again, wouldn't decreased flow result in a greater delta?
I know there's a chart that illustrates the head and flow for the various modes, but I'm not too good at interpreting what that really means. I also think that Taco has introduced new firmware for the 2nd generation of 007e's that only go into "econo" mode after 7 days of continuous operation rather than 12 hours, after a lot of pushback from people whose systems tend to run continuously.
I'd really like to understand better if this short trigger "green" mode is going to be a problem long term. Or if maybe the deltas I seeing today are just an outlier.
Thanks.
I apparently have one of the first generation 007e's (with the old firmware) and it is programmed to go into "econo" mode after 12 hours of continuous operation (signified by the green LED). What I notice is that when it does, my delta tends to really shrink. Typically, on a day like today (14 degrees this AM), supply is about 118 and return is about 102--that's in non-econo mode (orange LED) and everything is totally groovy. Today, with the same outdoor temperature but in "econo" mode, we've got about 115 supply and 107 return. We still seem to be keeping up okay, but worry that if being in "green" mode throttles down the flow somehow, we might get behind. Then, again, wouldn't decreased flow result in a greater delta?
I know there's a chart that illustrates the head and flow for the various modes, but I'm not too good at interpreting what that really means. I also think that Taco has introduced new firmware for the 2nd generation of 007e's that only go into "econo" mode after 7 days of continuous operation rather than 12 hours, after a lot of pushback from people whose systems tend to run continuously.
I'd really like to understand better if this short trigger "green" mode is going to be a problem long term. Or if maybe the deltas I seeing today are just an outlier.
Thanks.