Upgraded Exspansion Tank

Upgraded exspansion tank

PostBy: wilder11354 On: Mon Sep 02, 2013 3:34 pm

took the watts ET30 off top oil boiller, which has been in use 2 seasons with dual boiler setup, always at 20>24 pounds when both boilers up and running. replaced with an Amtrol SX-40V tank hooked off bottom of watts Microbubble seperator, with a watts RBFF valve between them. isolate fill/backflow valve, or exspansion bottle from system for service with this RBFF valve . Now on to wiring the circulators for on only when theres a heat demanbnd, and having it switch from coal to oil and back based on ltemp of coal boiler when it has long recovery due to extreme lower outside temps(below 10*F). But not running coal boiler loop 24/7 it might not ever drop or have a slow recovery then, will seee
(83.23 KiB) Viewed 11 times
View: New PagePopup • Select:BBCode
(82.28 KiB) Viewed 15 times
View: New PagePopup • Select:BBCode
Hand Fed Coal Boiler: Harman SF260 Boiler
Coal Size/Type: nut or pea, anthracite
Other Heating: crown oil boiler, backup.if needed

Re: Upgraded exspansion tank

PostBy: Freddy On: Tue Sep 03, 2013 7:03 am

Nice improvement. Looks good!
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

Re: Upgraded exspansion tank

PostBy: waldo lemieux On: Tue Sep 03, 2013 8:08 am


Expansion tank will make it possible to run 12-15 lbs consistently, I would think. Good hustle on that! What are you running for a boiler, a hand fired? If you go ahead with the switching back and forth the boilers based on temp in the coal boiler ,I'm sure your savings are gonna take a major hit. If your not getting a quick enough response with the coal boiler ,I think maybe you should try a Tekmar or similar(coal trol?) thermostat that anticipates demand by reading changes in outside temp and ramping up your system ahead of the anticipated demand. They might even have something that takes into account wind changes and time of day. I'm thinking you'll find that your oil unit will "crowd out" your coal
unit and seriously cut into your coal savings. Unless your coal unit is too small.....???? I think you need a controls makeover, don't start cutting until someone with more knowledge chimes in :gee:

waldo lemieux
Stove/Furnace Make: efm
Stove/Furnace Model: s-20