I have a quick question. I have talked to several local hvac
companies, and I really need a second opinion. Have a 4400 sf brick
home, outside of detroit mi. There is a 1955 US Radiator 200,000 btu
hot water boiler in the basement now, 3 zones, 3 b/g circulators, and 6
relays (3 24v coil relays for the circs. and 3 110v relays for the
burner). The furnace was initially oil burning with a domestic
tankless coil in it. The boiler was switched to gas in the 1980s.
After the switch, an electric water heater was installed, and the
tankless coil was left disconnected from water. When that electric
water heater went, it was replaced with a normal gas unit. Now- The
I want to re-use that tankless coil to heat water ONLY during the
winter and ONLY for half the house (kitchen, laundry- high temp.) Now I
dont mind opening and closing a few valves every spring/fall, but the
question is how do I have the HVAC co set up the aquastat. I assume,
that originally, the boiler had a triple aquastat which kept the boiler
"warm" year round. Now there is a single aquastat, acting as a "high
limit" set to i think 160 degrees. The burner and aquastat only get
power when a circulator/zone is active. Since i shut the boiler down
during the summer, do I want a triple aquastat installed, or should I
just feed the existing aquastat 24v 24/7 during the winter ? I know
that years back, the space heating operated on the high portion of the
aquastat, and the water heating operated on the low side, since it
represented such a small load, but since I have a large hot water
demand, can I just run the boiler at one temperature (160-180) Thanks a
lot, I appreciate the help. Also- when i have my hvac co come out and
replace the aquastat and hook up the plumbing, has anyone had good luck
with a particular brand of aquastat?
Replace your boiler. The thing is an antique. Consider a modulating
condensing boiler with an indirect fired water heater. With what
you're paying in fuel now you'll pay for the investment in short
On 19 Oct 2006 18:31:14 -0700, email@example.com wrote:
If a tree falls in the woods and kills
a mime, does anyone care?
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.