Best Of
Re: Can I use new oil boiler to replace old? Old is leaking. Old has vent, looks like new does not? TY
If your old boiler is way oversized and you experienced short cycling in the coldest days of the winter, then the replacement boiler is too big. If the old boiler didn't properly heat the home then it might be too small. If Goldilocks selected the old boiler and it was "just right", then that replacement boiler will probably work fine.
What I am saying is: to select a replacement boiler you should have a professional measure your home for a heat loss calculation. Many older homes had Coal Boilers that were converted to Oil and even to Gas. When those old conversions were replaced, the plumber may have selected the replacement based on the coal boiler size. Many of those coal boilers were oversized by as much as double or more. If your home's heat loss is only 60,000 BTUh then that replacement boiler is way too big.
But if you are asking “will the new boiler do the same job as the old one”… it is very close to the same size so it will do the job in the same way as the older boiler did, short cycling, wasting fuel and costing you more than you need to spend for comfort. And who wants to spend more on fuel oil at today's prices?
Think about the last time it was the coldest day of the year and the old boiler was operating to keep you comfortable. Did the oil burner shut off for 10 minutes or more a couple of times during the hour? If it did then it is too big.
a boiler that can produce 138,000 NET BTUh installed in a home that needs 60,000 BTUh on the coldest day will get hot so fast that the water temperature will reach the high limit setting and the burner will shut off for some time. When the water temperature drops below the high limit setting the burner will come back on. If the burner operates 10 minutes on and ten minutes off for several hours at a time, then the 138,000 BTU capacity is actually only 69,000 BTUh. It only operates for 30 minutes every hour so it only needs to be a 69,000 BTU capacity heater. I hope this helps you to decide on the proper course forward.
Mr. Ed
Re: Tempstar furnace no heat.
Make sure the gas is turned on.
I would then check for 24 volts at the PV (pilot valve) terminals on the gas valve and also the PV terminals on the ignition control module on the right hand wall in your picture.
Re: Unico potable water furnace, expansion tank pressure
That looks like you have 70 PSI water pressure on your system. DO NOT set the air pressure in the tank to 15 PSI. You may as well not connect the tank at all. If you want the tank to do the job it was intended to do, set that air pressure WITH THE TANK NOT CONNECTED TO THE SYSTEM to 65 -70 PSI air pressure.
If the tank is connected to the water pressure in the system, the water pressure in the system will compress whatever air is in that tank to 70 PSI. Don't measure the tank air pressure with water pressure on the other side of the tank.
Re: House is Overheating
you said new thermostats,
like new since the heat ran last?
or were the thermostats in place last heating season?
neilc
Re: Dirty hot water, boiler overfilled, related?
Sounds like the indirect coil is leaking.
What I would do is mark the boiler water level with a sharpie and drain and shut off the indirect tank before you go to bed.
In the morning the boiler water should not have moved, or it could drop a little as it could be leaking back through the indirect as the indirect now has no pressure on it.
Re: “Polished” cast iron radiator finish
Cast iron is very brittle and can not be polished .. Powder coating for the polished look is your best bet .
Big Ed_4
Re: AO Smith Gas Water Heater Warranty Replacement
Yeah i just can't wrap my head around charging a handling fee to replace a water heater under warranty when you sold the original equipment, it's just not customer friendly at all. seems so clear that 90 was leaking, just fix it and keep the customer happy, clearly an install error.
GGross
Re: Slant fin oil boiler
Doubt that it is something major. It maybe they just need an adjustment. Since you are almost due for service in November why not have it done sooner. Tell your service provider so they are aware of the issue.
Re: Combustion air for cast iron boiler
my understanding was that if it had overhead door that a vehicle could be stored inside, a flame needed to be elevated 18”
We did this with water heaters in garages or with attached rooms until the flame protected style water heaters became available
No harm in checking with the current codes in that area. Stay safe.
hot_rod
Re: House is Overheating
I believe that what you’re calling “diverter valves” are actually zone valves.
The aquastat does not control these, the thermostats do, and their end switches turn on the pump control and that turns on the boiler.
Some better pics from further back that encompass the boiler, its near piping and controls may be more helpful, but diagnosing a control issue requires a multi meter and the knowledge of how to use it.
Ironman