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Re: Should return side vents in my 2-pipe system ever close?
With that new trap, the steam can no longer reach the returns from that point so it will find its way thru any traps that are leaking.
If Gerry's working on this, you can't do any better. He'll get you straightened out.
If Gerry's working on this, you can't do any better. He'll get you straightened out.
Re: TRANE XV90 PROPANE FURNACE PROBLEM:
Get rid of that service tech first. I wonder how he cleaned the hot surface igniter. Have him reimburse you for the new burners.
Furnaces will automatically bring the fan on and run when one of the limits on the furnace opens everything from the blocked vent switch, roll out switch, auxillary switch (located in the fan compartment), pressure switch any one of those switches opening will cause the fan to come on. Make sure the filter is clean and that there is no blockage in the condensate line.
If there is overheating or a premature failure of the auxillary switch in the blower compartment this can happen. What then happens after a long running time the switch will re-make hence your problem.
Your furnace has what is called "soft lockout" it usually on most models is one hour. It occurs because after several attempts to light the furnace shuts down and then one hour later will try again.
Furnaces will automatically bring the fan on and run when one of the limits on the furnace opens everything from the blocked vent switch, roll out switch, auxillary switch (located in the fan compartment), pressure switch any one of those switches opening will cause the fan to come on. Make sure the filter is clean and that there is no blockage in the condensate line.
If there is overheating or a premature failure of the auxillary switch in the blower compartment this can happen. What then happens after a long running time the switch will re-make hence your problem.
Your furnace has what is called "soft lockout" it usually on most models is one hour. It occurs because after several attempts to light the furnace shuts down and then one hour later will try again.
Re: Information request - high quality, small footprint, gas, steam boiler replacement
I doubt a new boiler will take up less space.If it is massively over sized maybe, but it would have to be huge to make a noticeable difference. Replacing an entire boiler to gain a little space would be a HUGE expense for a few square feet. Hopefully the OP will come back to clarify what their goal is.
KC_Jones
5
Re: Information request - high quality, small footprint, gas, steam boiler replacement
How far over 10 years is it? Why do you want to replace? Is there something wrong with your current unit? If the one you have is around 10 years old and you are looking for some efficiency gain I wouldn't count on anything significant. The technology for steam hasn't made any big gains for decades. Unless you are having problems (like leaking) with your existing boiler your best bet is to just leave it alone and take care of what you have.
KC_Jones
5
Re: Meter accuracy
If you call the gas company and tell them it appears your boiler is not drawing the correct amount of gas and you are concerned there might be a pressure problem, the will usually send someone out the same day.
Make sure they check the gas pressure when everything is off and again when everything is working. The pressure should not drop y more than 1/2 " WC at the meter. I doubt they will check the pressure at the boiler but at least you will know if the gas supply is good.
Bob
Make sure they check the gas pressure when everything is off and again when everything is working. The pressure should not drop y more than 1/2 " WC at the meter. I doubt they will check the pressure at the boiler but at least you will know if the gas supply is good.
Bob
BobC
5
Re: How to loosen setscrews on scaleplate to recalibrate pressuretrol
On the left side of the lever there is a threaded ferrule that the top pressure adjustment screw threads into. That sometimes gets unscrewed, make sure it is engaged.
Sometimes the microswitch contacts get welded closed. To test that, remove one of the wires on the switch, if the boiler shuts down the pressuretrol is at fault. BE CAREFUL THOSE WIRES CAN HAVE 120V ON THEM - turn off the power before messing with them.
Bob
Sometimes the microswitch contacts get welded closed. To test that, remove one of the wires on the switch, if the boiler shuts down the pressuretrol is at fault. BE CAREFUL THOSE WIRES CAN HAVE 120V ON THEM - turn off the power before messing with them.
Bob
BobC
5
Re: Meter accuracy
My boiler is runs at 90,000 btu (set by orifice size) and I was having problems. When I checked the pressure before the boiler gas valve it was 8.3" wc, when the boiler started up that dropped to a little less than 5. the output of the gas valve was 3.5" and bouncing all over the place.
I had the gas company out and they verified the pressure drop was unacceptable. they replaced the pipe coming in from the main in the street with a new 1-1/4 feed and a new meter that connected to the 1" house main. Problem solved.
Note my internal main is 1" not 3/4", bigger is better. Its conceivable your meter is off but I would have the gas pressure checked at the input of your boiler gas valve and see if it drops excessively when it starts up, then check the output to make sure it's set correctly.
Bob.
Bob
I had the gas company out and they verified the pressure drop was unacceptable. they replaced the pipe coming in from the main in the street with a new 1-1/4 feed and a new meter that connected to the 1" house main. Problem solved.
Note my internal main is 1" not 3/4", bigger is better. Its conceivable your meter is off but I would have the gas pressure checked at the input of your boiler gas valve and see if it drops excessively when it starts up, then check the output to make sure it's set correctly.
Bob.
Bob
BobC
5
Re: Meter accuracy
Your sure the boiler was firing the whole time, and the water heater was off.
It's not unlikely to have a .5% margin but that's a lot.
It's not unlikely to have a .5% margin but that's a lot.
Gordy
5
Re: An Electrical Question
As long as your not drawing huge spikes of current and that cable is twisted pair you should be ok.
Bob
Bob
BobC
5
Re: An Electrical Question
Induced noise should be in the millivolts, and thermistors have a wide enough swing that the controller input circuitry should not even notice. A platinum RTD would be far more likely to see noise, but it could (should, actually) be filtered out by the controller.
SWEI
5