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Re: McDonnell miller 47-2 overfilling boiler
@109A_5
Good catch, I found the valve on eBay, but the flow was reversed. I reversed the plumbing to accommodate it. After observing the operation of the M&M for the past week, it seems that the unit is operating correctly. The problem happens during the longest run the boiler has, first thing in the morning. Typically the boiler runs for about an hour and a half in the morning. The level starts off good, during the run the water level gets low (not enough to shut down the furnace) and the M&M adds water. After the furnace shuts down water starts to come back to the boiler, raising the water level up past the sight glass. All that happens within 5 minutes of shut down. I think if I stopped the flow of water to the M&M after the furnace starts then let the water flow again 10 minutes after the cycle ends it may solve the problem.
Good catch, I found the valve on eBay, but the flow was reversed. I reversed the plumbing to accommodate it. After observing the operation of the M&M for the past week, it seems that the unit is operating correctly. The problem happens during the longest run the boiler has, first thing in the morning. Typically the boiler runs for about an hour and a half in the morning. The level starts off good, during the run the water level gets low (not enough to shut down the furnace) and the M&M adds water. After the furnace shuts down water starts to come back to the boiler, raising the water level up past the sight glass. All that happens within 5 minutes of shut down. I think if I stopped the flow of water to the M&M after the furnace starts then let the water flow again 10 minutes after the cycle ends it may solve the problem.
Re: Help me with the basics
@EdTheHeaterMan They have an SL10-85 G3 model that will modulate down to 10K BTU’s.
I had a 50,000 BTU Munchkin in my 1,200 [] house with a 50 gal. indirect for 15 years until the HX started leaking with plenty of DHW for me and the wife.
Re: Water trickling sound after boiler turns off - normal?
It would be normal for your system. If the installer followed the instructions.
Edit: Found better illustration for YOUR boiler.
That noise might not be so obvious. But there would still be condensation returning to the boiler, so it may not go away completely.
Edit: Found better illustration for YOUR boiler.
That noise might not be so obvious. But there would still be condensation returning to the boiler, so it may not go away completely.
Re: Water trickling sound after boiler turns off - normal?
@EdTheHeaterMan did you modify that picture?No I didn't, that is out of a newer version. I thought that was odd also, but I found a better illustration that better matches the OP's boiler. Here is the original illustration from my post so folks know what your are talking about. But it looks like it should work as a second or alternate main location as far as steam and condensate are concerned.
(surprised to see that bullhead at the end of the header)
It's on page 11 of this document.
Re: Help me with the basics
i would recommend a boiler like a lochinvar knight. With the knight you can wire in the 3 zones directly to the boiler and you can adjust each zone to different heat outputs, meaning different loop temperatures. Having an unbalanced system could be caused by not having enough baseboard or too much. With each zone connected to the lochinvar smart control they can have different loop supply temperatures which can help the required BTU output.
pedmec
2
Re: Geothermal residential system - frustrated
Do you have the manual for the heat pump? Maybe there is a time delay function to prevent quick change over from heat to cool
hot_rod
1
Re: Geothermal residential system - frustrated
you would think the contractor would have identified that the compressor went into cooling mode---seems like the stat was 'stuck'.
GW
1
Re: Indirect Controls
The water heater is not on priority.
Is the water heater piped as a separate loop, Tee'd off the primary loop and wired into the boiler, or is the water heater piped on the same manifold with all the space heat zones?
Does the boiler know to max fire on a DHW demand?
Is the water heater piped as a separate loop, Tee'd off the primary loop and wired into the boiler, or is the water heater piped on the same manifold with all the space heat zones?
Does the boiler know to max fire on a DHW demand?
HVACNUT
3
Re: Harsh Reminder
Today in Virginia: Propane leak. Tank outside the house. House explodes. One firefighter killed and nine others injured.
https://apnews.com/article/virginia-fatal-home-explosion-firefighters-909fdbcb6e189d2c4bcb4a7512f0c053
https://apnews.com/article/virginia-fatal-house-explosion-ca5bba45c6311573b3ec82dfa3919ee7
Lessons learned in the LEAP blowout still unlearned. People OUTside smelled gas, so responders go inside to check it out. I'm no expert, but seems to me the response should be to evacuate, barricade, and ventilate until your _Gas_Detector_ shows a low-low-low reading.
https://apnews.com/article/virginia-fatal-home-explosion-firefighters-909fdbcb6e189d2c4bcb4a7512f0c053
https://apnews.com/article/virginia-fatal-house-explosion-ca5bba45c6311573b3ec82dfa3919ee7
Lessons learned in the LEAP blowout still unlearned. People OUTside smelled gas, so responders go inside to check it out. I'm no expert, but seems to me the response should be to evacuate, barricade, and ventilate until your _Gas_Detector_ shows a low-low-low reading.
PRR
1
