In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Utica \Boiler mate Short Cycling
OK So I have to admit up front that I am just a home owner and dont have any formal traing as a furnace technician. I am not asking advice so I can fix my issue myself but just want to fully understand what could be the issue so I can be infomed when I deal with my Oil Company.
Here is the problem as I see it: 20 year old Utica SF-3100WT\Amtrol Boiler Mate 41 Gal. Now I heat my house 100% with wood and all zones are set to 50 degrees so the only draw on the Utica should be the Amtrol hotwater heater. When I pull DHW after about 5 min the boiler comes on which make sense - the boiler temp goes down to about 140 and then climbs back to 180 and shuts off. The aquastat is set at 170\120 with a diff of 25 (honeywell 8124a). Now my issue is that nearly EVERY hour the boiler will come on and run for approximately 2 min then shut off even during the middle of the night and all summer long as well. I have noticed that when this happens the boiler temp is about 180 and if I put my hand on the hotwater supply line to the Amtrol- the pipe is only warm not hot so I dont think it is the water heater calling for the boiler to turn on. During these every hour events I also run down there and feel the pipes on the other side of all the zone valves and they are not hot so I dont think the thermostats are triggering the boiler either or I would assume the taco valve would open and the pipes on the other side of it would be hot...
I am a VERY handy guy and fix most everything that needs to be done with my house- also a software developer so the logical side of my mind can not really figure out what is going on. I have done enough research to know that "maybe" the boiler was at one time set up for a tankless DHW and then the Indirect water heater was added and the hourly cycle is to keep the boiler heated for old tankless coil setup...but this is where my head starts to spin and loose confidence I know what is going on. The main reason for my concern is that I am burning WAY to much oil for the amount of hot water I am using - only me and my wife so we do not have tons of kids using hot water all day long. and I burning about 500-600 gal per year!!!!
Is there any logical reason why the boiler would fire even though the temp of the boiler is about 180 degrees??? Also if anyone has a potential solution that would help me talk to the repair company inteligently that would be awesome. Also I know the oil company has professional and this is their job but my confidence is kind of low as the last time they were here I asked them questions about this all they could say was the old mercury tstats could be bad...
Thanks in advance for any advise you could offer.