Best Of
Re: Where does oil leak in a furnace?
Oh please.
Find another technician. Who really is a tech., not a salesman.
Re: Short cycling boiler. I'm stumped.
With the power off, open the cover on the side of the circulator. There will be two wires with wire nuts on them. Undo the wire nuts and connect the leads from the circulator (not from the incoming wire) to a new cord that has a standard outlet plug on it. You'll probably need to make this cord from an extension cord. Plug this into a standard duplex outlet. Now, the circulator runs continuously, independent of the L8124
LRCCBJ
Re: Short cycling boiler. I'm stumped.
Also the relay solder joints to the circuit board in Honeywell aquastats is a known issue. The Red arrow points to the Relay. It as a much more awkward job to inspect the relay solder joints in the aquastat, much disassembly. Mechanical pressure (with an insulated nonmetallic tool) from different angles to the circuit board and the frame of the relay may identify a failing solder joint during a failed call for heat.
If the DHW call works consistently and just the call for heat is intermittent I would suspect the aquastat since the electrical path through it is different for the different operations. The Red highlight components is a thermostat call path which uses the relay the get power at B1 to B2, the DHW low limit path uses the contact highlighted Blue. If the solder connections are intermittent at K1 or 1K1 the power to the rest of the system will be intermittent too and only during a thermostat call. With a meter it would make short work of where the electrical path ends when the system acts up.
109A_5
Re: What constitutes "leaking" on a big mouth vent?
I have 8 Big Mouths at the end of the main, a Gorton #2 and 2 MoM #1 on 3 branches. The #2 is the slowest to close of the 3 styles. I do check the BM as they all did leak after 1-2 heating seasons, I replaced the original O-rings and have 5-6 seasons on all of them without any problems. The original o-ring was smashes and several looked melted, replaced with hi temp silicone rings from McMaster Carr.
Neild5
Re: What constitutes "leaking" on a big mouth vent?
My experience is that some vents are slower to close than others. I've never used the Big Mouth ones, but I find Gortons bi-metal type vents allow more steam to escape before closing than Hoffman sealed-expansion-vessel types.
I'm sure Big Mouths have their particular "rate of closure," so it is possible that this can cause a generous escape of steam over time.
Re: 007 Circulator “getting tired”?
yes, any motor with bearings can degrade/fail over time causing pump to drag; increased friction will also overheat pump.
PC7060
Re: 007 Circulator “getting tired”?
as always there can be other reasons. I have found too many new small pumps on systems that had B&G 100 on them. And flow checks. I started checking pump curves against the system head calculations and find some barely meeting the requirements. So bad or wrong pump, or other should also be considered.
Lance
Re: 007 Circulator “getting tired”?
You could also take a look at the age of the circ, there should be a date code stamped on the electrical box showing a month and year of manufacturing.
Dave H_2
Re: 007 Circulator “getting tired”?
More apt to be a seized circ and maybe gravity flow doing the heating. Or air locked.
When they seize, or air lock you basically have a 78W heater.
Being a wet rotor, fluid cooled design they run pretty close to the system fluid temperature, if fluid is moving through them.
An simple amp draw check would tell you more.
hot_rod