DHW Coils and De-Liming?

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Kungur
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Stove/Furnace Make: Keystoker
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Location: Chardon,Ohio

Post Mon. Jan. 07, 2013 8:28 am

So last night while laying in bed my mind starts to wander. I started thinking "Is there so maintenance I should be doing on the coil?".
So any advice out there?
I await your replies so I can have a better night's sleep!

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SMITTY
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Stoker Coal Boiler: Patriot Coal - (custom built by Jim Dorsey, Taunton MA - RIP 4/18/13)
Hand Fed Coal Stove: Harman Mark III (SOLD!)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler
Location: West-Central Mass

Post Mon. Jan. 07, 2013 9:40 am

I've never done it. The inside seems pretty clean each spring when I remove them.

The outside is a completely different story though. They get the twisted-wire wheel treatment - makes short work of the buildup.

These aren't DHW coils though ...
The laws that forbid the carrying of arms...disarm only those who are
neither inclined nor determined to commit crimes. ...Such laws make things worse
for the assaulted and better for the assailants, they serve rather to
encourage than to prevent homicides, for an unarmed man may be attacked with
greater confidence than an armed man."

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Crimes and Punishment."

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Freddy
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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 Mon. Jan. 07, 2013 10:19 am

Usually nothing is done until they do not supply the hot water needed. Then a bunch of valves & an acid pump, pumping reverse to the normal flow of water...until it flows easily or 5 minutes, which ever comes first. It's smelly, somewhat dangerous & you have to have an acid pump. Acid used to be $19 a gallon. I bought a gallon last year & it was $45!!!!

PS While I was doing that sort of thing on a regular basis, we never burned through a coil (watch those 5 minutes) ....but it can and does happen, so there's always the possibility you immediately need a new coil.
Orrington, Maine
Fred

"If you can't say something nice, don't say anything at all".


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Rob R.
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Stoker Coal Boiler: EFM DF520
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Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Mon. Jan. 07, 2013 10:52 am

I'd give the coil a nice flush in both directions once per year just to keep sediment to a minimum...other than that, if it is working fine stay away from the acid.

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plumb-r
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Stove/Furnace Make: Hitzer
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Location: Nottingham,Pa

Post Mon. Jan. 07, 2013 8:53 pm

Makers of tankless water heaters recommend flushing their coils with white vinegar. It does a fair job and will not blow through the coil, and a few gallons at the grocery store is cheap. :D

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