Best Of
Re: H/W Coil replacement
one issue with stainless bolts is there is no stretch or give. Tell snap before you notice any movement.
grade 5 bolts are fine.
Never seize is your friend on the gasket and bolts.
After a few weeks tighten the bolts again.
pecmsg
Re: Axeman-Anderson oil fired boiler vs. Burnham oil fired
I didn't realize you had the R7284 primary control. there is a feature that you can use to bypass the 15 second trial for ignition to prime the pump and to do the CadCell test. It is called "pump prime"
Pump Priming Cycle
To facilitate purging air from the oil lines and filters, the R7284 can be placed in a purge routine by pressing and releasing the up arrow button during the Trial ForIgnition. In the advanced interface “PUMP PRIME” is displayed on the display along with the time left on the Trial forIgnition (TFI). Pressing the up arrow button adds a minute to the TFI time for a maximum of 10 additional minutes (press the up arrow button 10 times). Pressing the down arrow button subtracts a minute from the TFI time.
YOU MUST ONLY USE THIS FOR TESTING WHEN YOU KNOW FOR SURE THAT THERE IS A FLAME IN THE COMBUSTION CHAMBER. You do not want to run the burner motor and fuel pump for more that 15 seconds if there is no flame.
If you remove the yellow wires from the R7284U control and connect them to a separate ohm meter (not the one included in the R7284U) you will be able to diagnose the flame signal from the yellow wire, thru the Eye and back to the meter from the other yellow wire. You will have 5 minutes to make sure the ohm meter is connected properly and watch the ohm reading as the flame is operating in the combustion chamber.
There are 2 possibilities when the flame is present
- the C554 cad cell circuit is defective (eye, eye adaptor, yellow wires, spade connectors, mounting bracket)
- the R7284U control is defective
In order to rule out the control (the more expensive repair) you need to do the test as I have described above and illustrated in the comment above, using a separate meter. If you can not get an ohm reading of less than 1000 ohms, then replace the C554A 1463 complete assembly with a new one. If you do get the expected Ohm reading below 1000, then replace the R7284U 1004 control.
Re: Boiler Heats House and Pool
@Alan (California Radiant) Forbes so, if I understand this correctly, the pool is heated with a radiant copper loop on the sides of the pool? In addition, this radiant system and boiler have been in operation since the 1950's? That's pretty impressive!
Re: question about swing joint elbow orientation on a Roth tank
Use a 3 elbow swing. Have the pipe come in past the centerline of the tapping put a 90 on the pipe then a nipple and another 90 then a nipple and a 90 down into the tank. So you come in past the centerline turn then turn and go back to the tapping. I would arrange the fittings so they tighten when the tank is filled.
I am not sure Roth knows what they want.
If the tank settles as it is filled and they are worried about a gap why do they have pipe hangers shown in the diagram??
Seems to me the pipes need to be unsupported so they will float with the tank or you will have a gap. Swing joints can't swing when hung.
Common sense must prevail. Just hook it up
Re: Installing new bathroom zone on a pretty screwed up system
Radiantec is the bane of Vermont and all of their clients who "fall victim". I have encountered too many of those systems. You did the biggest correction by adding a Viessmann boiler, transfer plates and insulating below the stapled-up 7/8 tubing. It might help if you insulated the 1" "long manifolds" so that more heat could get to the indiv. 7/8" loops. The floor sections with 1" manifold must be "plenty warm"! It seems like your challenge is to balance the flow, set the Viessmann boiler program properly and let IT decide the water temperature—not the indiviual mixing valves. Something close to constant flow would be best.
psb75
Re: heating oil tank manufacturer's warranty voided by transfer of oil from the old tank?
Yup. The infamous TL.
Everyone insists you can run single pipe overhead
But the you end up with a TL more times than not.
Re: Snow Melt Mavens, I need your advice
what type of boiler? What was the SwT with the valve closed, and delta?
Was the system under load ? Melting snow during the adjustment?
With the bypass closed the boiler must have been seeing cool return? 30 degrees or lower?
hot_rod
Re: Remodeled House. Now Radiators Are Way Too Large
If somebody decides to install an air to water unit in the future, they will thank you!
Kaos
Re: Remodeled House. Now Radiators Are Way Too Large
Not over sized… sized for max efficiency.
Did this w/ my own home. Cast iron rads. love it.
kcopp
Re: ADVICE/IDEAS NEEDED! 3 Commercial Hot Water Heaters
Hi, Before doing any boiler room work, I'd be measuring shower flow rates and water pressures over at least a 24 hour period. If pressures fluctuate, I'd be looking at pressure compensating showerheads. Neoperl makes the innards for showerheads. I'd be installing 1.5 gpm heads if what you have now is larger. Once that work is done, I'd be metering hot water usage so yo know just what the demand really is. With that info, you can work in the boiler room and size the equipment to the measured need. You might find a lot of savings in equipment costs once the hot water demand is controlled. I know I'm not answering your questions directly, but this sequence of doing the work gives you the best chance of success.
Yours, Larry
