Using a Solenoid Valve for Boiler Loop

User avatar
stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Thu. Sep. 18, 2008 6:05 am

Does anybody here use a normally open, solenoid-controlled valve in one of your large heating loops to allow the boiler to circulate by gravity in the event of an electrical outage?

If so, where did you buy it and how has it performed?


User avatar
Blackdiamonddoug
Member
Posts: 328
Joined: Wed. Jun. 11, 2008 8:52 am
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260
Location: haverhill Ma

Post Thu. Sep. 18, 2008 9:16 am

Hi Stoker Man
I used one on a comercial application it works fine as long as it is rated for the temperature.
What size pipe is the pipe?
I can look in my bin in the cellar see if I have one.
Doug

User avatar
Yanche
Member
Posts: 3030
Joined: Fri. Dec. 23, 2005 12:45 pm
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea
Location: Sykesville, Maryland

Post Thu. Sep. 18, 2008 10:10 am

Does the solenoid coil have to be powered all the time to keep the valve in it's normal position?

User avatar
stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Thu. Sep. 18, 2008 10:43 am

It must be powered all the time so that if the power goes off, it opens to allow gravity flow. There would be one valve, maybe two and the zone valve would be left manually open. My pipes are 3/4".

User avatar
Freddy
Member
Posts: 6625
Joined: Fri. Apr. 11, 2008 2:54 pm
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined
Location: Orrington, Maine

Post Thu. Sep. 18, 2008 12:46 pm

I tried one once for a different application in my house. They might be OK in a factory, but it hummed so loud we couldn't stand it. It resonated through the whole house. I used it for exactly 24 hours and decided to do without.

If there's a power outage go hand open a flow check. Also, it's not as good as the theory. Unless you have large pipes and planned on it heating by gravity, it's really not going to work all that well. Before I spent any money, I'd turn off the circulator, open the flow check and see if it actually heats.

User avatar
Blackdiamonddoug
Member
Posts: 328
Joined: Wed. Jun. 11, 2008 8:52 am
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260
Location: haverhill Ma

Post Thu. Sep. 18, 2008 1:19 pm

stoker
Ill look in my cellar to night for a NO power to close SV that 3/4 inch or larger.
Our buddy from maine has a point some SV do hum ( I Think its because the don't know the words)LOL

BBD

User avatar
stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Thu. Sep. 18, 2008 3:41 pm

He has a good point about the humming. The problem is that if I would fill the firebox and then leave and have a rare electrical outage..............

User avatar
Freddy
Member
Posts: 6625
Joined: Fri. Apr. 11, 2008 2:54 pm
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined
Location: Orrington, Maine

Post Thu. Sep. 18, 2008 6:51 pm

stoker-man wrote:The problem is that if I would fill the firebox and then leave and have a rare electrical outage..............
Welllll.... will the air inlet should shut when the boiler gets to high limit? If that isn't enough to keep the heat from going over 230.... it'll relieve some heat from the T&P valve.

The normally open solonoid controlled valves are not cheap.... how about spending that money on a UPS to run things for a while if the power goes out?


User avatar
stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Thu. Sep. 18, 2008 9:36 pm

What's that?

djackman
Member
Posts: 381
Joined: Sat. Jan. 19, 2008 12:01 am
Stove/Furnace Make: 1980 vintage Tarm
Stove/Furnace Model: FT22 (aka 202) installed!
Location: Long Island, NY

Post Fri. Sep. 19, 2008 2:38 am

I"m interested in this subject myself and here is what I've found:

Honeywell states for a common zone valve (V8043 series):

"Valves are designed for normal cycling , not continuously energized operations."
https://customer.honeywell.com/Techlit/Pdf/95c-00 ... 10938B.pdf

However, there is no duty cycle listed on the spec sheet.

Taco's valves (both motorized and thermal drive) do not say anything about duty cycle on their spec sheets.
http://www.taco-hvac.com/en/library.html#

User avatar
Freddy
Member
Posts: 6625
Joined: Fri. Apr. 11, 2008 2:54 pm
Stoker Coal Boiler: Axeman Anderson 130 (pea)
Hot Air Coal Stoker Stove: Reading piece o' junk in the barn (rice)
Coal Size/Type: Pea size, Superior, deep mined
Location: Orrington, Maine

Post Fri. Sep. 19, 2008 5:00 am

A UPS... an unimteruptable power supply. Basically, it's some batteries in a box with some computer parts. It keeps the batteries charged and if the power fails, it automatically takes over....until the batteries die. You'd have to calculate the power needed and decide how long you want it to stay running.

http://www.ultraproducts.com makes them for cumputers. I don't know....maybe this idea isn't so hot...all depends on the power neing used and length of time you want. This UPS way might get expensive fast.

User avatar
stoker-man
Verified Business Rep.
Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Fri. Sep. 19, 2008 5:51 am

Maybe a 12V valve, powered by a car battery? Getting interesting.

User avatar
Blackdiamonddoug
Member
Posts: 328
Joined: Wed. Jun. 11, 2008 8:52 am
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260
Location: haverhill Ma

Post Fri. Sep. 19, 2008 8:05 am

Stoker
PM your address I have a 1 inch normally open 120 vac to close Sv for you.
Black Diamond Doug

User avatar
coaledsweat
Site Moderator
Posts: 9918
Joined: Fri. Oct. 27, 2006 2:05 pm
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea
Location: Guilford, Connecticut

Post Fri. Sep. 19, 2008 9:17 am

If you are on a single zone, this may work.... poorly. If you have multiple zones w/valves, it won't work at all. Some zone valves have a manual overide that allow you to open them in the event of a power failure but may be toasted when the power comes back on, so check out what you have first.

You may want to look for a small generator or a powerful UPS, heating a home designed for hydronic heat with thermosiphon is a losing proposition, the pipes won't freeze but you may. ;)

User avatar
Blackdiamonddoug
Member
Posts: 328
Joined: Wed. Jun. 11, 2008 8:52 am
Stove/Furnace Make: axemen 260 rebuilt by Matt
Stove/Furnace Model: stoker AA 260
Location: haverhill Ma

Post Fri. Sep. 19, 2008 9:35 am

stoker
Had a box going today so I sent it to Matt's it show arrive on Tuesday.
Good luck
Black diamond Doug


Post Reply

Return to “Coal Bins, Chimneys, CO Detectors & Thermostats”