Best Of
Re: HTP Boiler humidity dislike + Error Code 11
If you stuck your finger into where the condensate trap connects and found goo then you need a cleaning on the fire side of the heat exchanger, not the water side. Clean the fire side of the heat exchanger first, nothing here indicates an issue in the water side
GGross
Re: I'm getting solar panels. I'll let you know how it goes in this discussion thread.
So does mine — but they cant replace aging components, nor upgrade it. It's purely reactive, not proactive.
Re: leaking return line
For what it's worth, I have a customer with an approximate 150, 000 BTU input boiler with a 3/4 inch copper wet return. Everything works perfectly. Would certainly never suggest such a thing but....
Re: leaking return line
No way that you need 1.5". 1" copper would probably be enough for most homes. But of course we need the numbers. And keep in mind, the old charts were sized assuming steel, which tends to rust on the inside and clog. There was a bit of a tendency to oversize to compensate for that. If you are looking to save on labor, you could always get yourself a ProPress. Maybe find a place that will rent it to you
Re: Mixing valves in oil fired radiant floor heating system
The forced air runs off the boiler as a high temperature loop? Or is all the hydronics low temperature. If so a mod con lp boiler would be my choice, running ODR.
the manual mix valve will in fact track with the boilers changing temperature. As the boiler drops so will the mix from the manual valve. The manual valve does not have a sensor, it is a fixed blend.
On the mix down manual valve you can also adjust the offset, dotted red lines, how it tracks with the higher temperature.
This shows the relationship with a 130 panel rad system, but it could be a 160, 180 or higher zone also.
There is no reason to have ODR on the boiler and also on the low temperature zone.
Of course with a cast boiler you will have a minimum return to be aware of.
hot_rod
Re: Warm Start Boiler Summer Leak
Agree. If the boiler is a factory assembled block, then it should be covered.
Re: Warm Start Boiler Summer Leak
Still the upper port gasket leak qualifies as a leaking boiler and Weil McLain will usually honor that when it is brought to their attention via a warranty claim. The worst that can happen is the warranty folks at WM say no. Then you appeal and they say no again. But I remember when I did WM warranty claims, I could talk them into covering that exact situation. The warranty coverage uses the term "heat exchanger" not "boiler section" on the WGO, WTGO and SGO warranty form. See copy of warranty form here Weil McLain WTGO 20 Year Warranty
Re: leaking return line
If you don't know your connected EDR than the boiler nameplate may be informative.
1" copper is a happy medium. But you want to add isolation valves at each end hose bibs for flushing the return. Those valves, tees and fittings could be threaded pipe which would avoid soldering for those items.
JUGHNE
Re: New Refrigerants
So glad to be retired.
My son does side work, and also is not interested in air conditioning any more. Oil heat is all he needs to make a few extra bucks after work and weekends.
Re: Mixing valves in oil fired radiant floor heating system
The supply water temperature to the floor will not change with the weather for the most part.
Lets say the fixed temperature mix for the floor needs to be 125° for the design days. (the coldest days) and the boiler will create 160° for that using the ODR when there is no call for DHW and the minimum temperature for the boiler return of 135°. The fixed temp mixing valve will take 160° supply water and add the proper amount of return water from the radiant in order to make 125° to the floor
When the boiler temperature drops lower temperatures based on the boiler or Tekmar ODR control sensing a warmer outside temperature (say 145°), the fixed temp mix valve will take the 145° reset temperature and mix less return water from the radiant return to make the supply 125° to the floor. So when the floor needs the lower temp on the warmer day, it will still be getting 125 °. That will over heat the room enough to satisfy (turn off) the thermostat until the room temperature drops below the thermostat set point and it calls for heat again. Room temperature thermostats and radiant floor heat are not the best combination to avoid large temperature swings in the rooms because of the slower reaction time of radiant floor systems.
Eventually the Tekmer or boiler ODR control will drop the supply temperature to 120° when the outside temperature is above 50°. That is when the 125 mix valve will not allow any return water from the radiant loop to mix with the 120° supply water. the 120° supply water will go straight through the mix valve. You will then get the lower floor temperature. Now this 120° boiler supply temperature will only happen when the boiler's burner is off. If the boiler's burner is firing then the minimum return temperature of 135° will need to happen by some function of the control system to protect the boiler from flue gas condensation.
I'm not saying that it won't work, I'm just pointing out the reason you might want to consider the Taco iSeries ODR valve. They were not available when I installed my radiant floor system so I installed fixed temp mix valves and used room thermostats. It worked fine for me. I just wanted you to know that without the ODR valve, you may be wasting your $$$ on using a Tekmer or other boiler ODR system.
What you think you are achieving with a Tekmar or other boiler temperature ODR may not happen after you spend all that $$$ on the control system. Save on the system ODR and use the ODR mix valve where it will do the most good. Or forget about ODR completely and save $$$ in installation costs.