Nanker
New Member
I have a Westinghouse WBRUNG80K fire tube boiler that has worked great the past 6 years or so. I have (2) zones (main floor and bsmt). The bsmt zone has only (2) radiators and the main floor has (5) radiators.
I put a wood stove in this year as an auxiliary heat source and have really enjoyed the addition. However, now that I am able to keep the main floor heated primarily with the wood stove during waking hours (~16 hours / day) I have discovered (2) related issues.
The first issue is that because we keep the temp in the bsmt quite low, ~60F requiring the boiler target tempt set for ~107F, ice was building up on the exhaust pipe outside, eventually causing an ER:29 error code: APS (air pressure sensor) Open.
So by increasing the boiler's target temperature to increase the exhaust temperature to minimize/resolve ice build up issue, I created a new issue where the boiler is cycling on and off with much greater frequency just keeping the bsmt heated when the wood stove is in use.
I am guessing that the (2) radiators in the bsmt are not a big enough load for the boiler's output, and so the return water temperature is too high and so causing the boiler to keep cycling its burn time off and on.
Before the addition of the wood stove, I pretty much had the boiler numbers dialed in with respect to outdoor temps so that the boiler just ran at a steady/continuous low target temp, which was ideal. I would now like to try and find that happy medium again, taking the wood stove into account, using the bsmt zone as the boiler's primary load for the bulk of any given day.
I am thinking I need to change the boiler's C:lt CH Return Temperature parameter to try and reduce the boiler's current set point between its b:tt CH Target Temperature and the C:lt CH Return Temperature to try and minimize the boiler's tendency to cycle off and on because the bsmt zone is not big enough to absorb enough heat for the return temperature to go below the current value.
So, first I would like it if someone with a little more know-how can confirm this possible solution to my current boiler woes. Second, if this does seem like a likely possible solution, I am hoping someone can tell me how to change that parameter, as the C:lt CH Return Temperature parameter does not seem to be one that is obvious to change.
I put a wood stove in this year as an auxiliary heat source and have really enjoyed the addition. However, now that I am able to keep the main floor heated primarily with the wood stove during waking hours (~16 hours / day) I have discovered (2) related issues.
The first issue is that because we keep the temp in the bsmt quite low, ~60F requiring the boiler target tempt set for ~107F, ice was building up on the exhaust pipe outside, eventually causing an ER:29 error code: APS (air pressure sensor) Open.
So by increasing the boiler's target temperature to increase the exhaust temperature to minimize/resolve ice build up issue, I created a new issue where the boiler is cycling on and off with much greater frequency just keeping the bsmt heated when the wood stove is in use.
I am guessing that the (2) radiators in the bsmt are not a big enough load for the boiler's output, and so the return water temperature is too high and so causing the boiler to keep cycling its burn time off and on.
Before the addition of the wood stove, I pretty much had the boiler numbers dialed in with respect to outdoor temps so that the boiler just ran at a steady/continuous low target temp, which was ideal. I would now like to try and find that happy medium again, taking the wood stove into account, using the bsmt zone as the boiler's primary load for the bulk of any given day.
I am thinking I need to change the boiler's C:lt CH Return Temperature parameter to try and reduce the boiler's current set point between its b:tt CH Target Temperature and the C:lt CH Return Temperature to try and minimize the boiler's tendency to cycle off and on because the bsmt zone is not big enough to absorb enough heat for the return temperature to go below the current value.
So, first I would like it if someone with a little more know-how can confirm this possible solution to my current boiler woes. Second, if this does seem like a likely possible solution, I am hoping someone can tell me how to change that parameter, as the C:lt CH Return Temperature parameter does not seem to be one that is obvious to change.