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Central Boiler / E-Classic 2400 with low water temperature
« on: October 07, 2018, 11:06:07 AM »
I’ve had this problem from the first day of installation; the FireStar temperature indicates 185F and the water temperature at the furnace outlet is 165F. The thermal couple for the FireStar has been replaced (type K TC, supplied by CB). The water temperature has been confirmed as 185F (on the upper right side where the FireStar TC is located) using high quality laboratory equipment (also type K TC), and the original TC checked out as being good. Outlet temperature has been checked by several methods; 1. Draining several quarts of water from the water level tube then checking water temperature. 2. Pipe temperature (copper ¾ inch) at furnace outlet with the pump running.
The heated water on the right side of the water jacket where the FireStar TC is located, I am guessing, is somehow being restricted from migrating to the left rear where the water outlets are located.
In an effort to try to bring my outlet temperature closer to 185F, I have installed a circulation pump that sources water from a return port and sends it to the drain port that is located below the heat exchanger tubes. This has not resulted in an increase in water temp at the water outlets.
I have tried to check the water jacket passages visually with an inspection camera, but have had no success routing the camera to see the positions that I want. I tried accessing at all 3 outlet ports, all 3 return ports and the top vent.
Being kind of stumped at this point, I thought that maybe my circulation pump may be causing sufficient turbulence that its suction was drawing hot top water mixed with the cooler return water. I added pipes to all 3 water outlets then routed them to the main circulation pump. I fired up the furnace for a test (don’t need heat when it is 80 degrees outside) and there appeared to be no change in outlet temperature, 165F (a 20 degree differential from the indicated FireStar Temperature of 185F).
I really would like to get my water temperature up closer to 185F. This E-Classic replaces an old CL 5640 that did a fine job heating the house. I have had to add an extra heat exchanger to compensate for the reduced water temperature.
Has anyone else observed this problem?
Does anyone have any ideas to correct my problem?
BTW I run my furnace with the optional FireStar XP Monitor. I strongly believe that the information that it provides is the only way to keep a close eye on the operation of these new gasification boilers and run them efficiently.
Thanks for listening, BIG THANK YOU FOR YOUR INPUT. Bob.
The heated water on the right side of the water jacket where the FireStar TC is located, I am guessing, is somehow being restricted from migrating to the left rear where the water outlets are located.
In an effort to try to bring my outlet temperature closer to 185F, I have installed a circulation pump that sources water from a return port and sends it to the drain port that is located below the heat exchanger tubes. This has not resulted in an increase in water temp at the water outlets.
I have tried to check the water jacket passages visually with an inspection camera, but have had no success routing the camera to see the positions that I want. I tried accessing at all 3 outlet ports, all 3 return ports and the top vent.
Being kind of stumped at this point, I thought that maybe my circulation pump may be causing sufficient turbulence that its suction was drawing hot top water mixed with the cooler return water. I added pipes to all 3 water outlets then routed them to the main circulation pump. I fired up the furnace for a test (don’t need heat when it is 80 degrees outside) and there appeared to be no change in outlet temperature, 165F (a 20 degree differential from the indicated FireStar Temperature of 185F).
I really would like to get my water temperature up closer to 185F. This E-Classic replaces an old CL 5640 that did a fine job heating the house. I have had to add an extra heat exchanger to compensate for the reduced water temperature.
Has anyone else observed this problem?
Does anyone have any ideas to correct my problem?
BTW I run my furnace with the optional FireStar XP Monitor. I strongly believe that the information that it provides is the only way to keep a close eye on the operation of these new gasification boilers and run them efficiently.
Thanks for listening, BIG THANK YOU FOR YOUR INPUT. Bob.
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