Pictorial: DF520 Domestic water coils w/part numbers

Pictorial: DF520 Domestic water coils w/part numbers

PostBy: stoker-man On: Fri Jan 11, 2008 10:14 pm

UNDER CONSTRUCTION, UNDER CONSTRUCTION


Any water leaks in a boiler system which require make-up water to be added, will greatly reduce the lifespan of the boiler. The water coil is one source where water can leak past a loose gasket and not be detected because it will evaporate before being seen. It is important to snug up the coil bolts/nuts at least once a year. Be careful not to overtighten, which will cause the gasket to bulge and break.

Early-style-5gpm-coil.jpg
(858.28 KiB) Viewed 196 times
View: New PagePopup • Select:BBCode
9551800 5 gpm domestic water coil; early style
9551754-3K Coil and gasket kit

Note the straight bolt pattern. The dimensions of the plate are 11 X 5 3/4.
[nepathumb]2754[/nepathumb]


Early style 7gpm coil.jpg
(657.28 KiB) Viewed 110 times
View: New PagePopup • Select:BBCode
9551586 Optional 7 gpm domestic water coil; early style
9552313K Coil and gasket kit


Note the straight bolt pattern. The dimensions of the plate are 11 X 5 3/4. This coil uses 3/4 fittings. Behind the 3/4' fittings on the front of the plate is the area where the water inlet and outlet branch into two 1/2" coils. The branching of the tubes and their size, sometimes causes a small interference problem when installing the coil into the boiler. Depending upon the production tolerances of the coil manufacturer, it may be necessary to grind a small area of steel in the boiler coil opening, at the coil inlet and outlet areas, to allow clearance for the branched copper when installing the optional 7 gpm coil.
[nepathumb]2755[/nepathumb]


Early-style-coil-gasket.jpg
(1.38 MiB) Viewed 67 times
View: New PagePopup • Select:BBCode
34383 Coil gasket; early style
[nepathumb]2771[/nepathumb]


Early-style-coil-cover-plat.jpg
(398.44 KiB) Viewed 37 times
View: New PagePopup • Select:BBCode
9534354 5 and 7 gpm coil cover plate; early style.

This plate is used when a domestic water coil is not needed and removed, such as when used with an indirect water heater. It is a flat steel plate to cover and seal the old coil opening.
[nepathumb]2756[/nepathumb]


Early-style-coil-patch-plat.jpg
(835.33 KiB) Viewed 137 times
View: New PagePopup • Select:BBCode
9537108-1 Coil patch plate; early style. The dimensions are 8 X 15 1/4.

Used when coil gasket leakage has caused enough rust erosion of the steel that the gasket will no longer seal. It is important to snug up the coil nuts every year to prevent gasket leakage. The early style coils were bolted against the boiler and leaks easily went unnoticed because a small leak would evaporate before it was seen. The boiler jacket made visual inspection difficult and the improved extended flange feature was added to the boiler.
[nepathumb]2757[/nepathumb]


LATE MODEL COIL PATCH PLATES ARE NOT YET MANUFACTURED

Late-style-5gpm-coil.jpg
(878.16 KiB) Viewed 84 times
View: New PagePopup • Select:BBCode
9005527 5 gpm domestic water coil; late style
9005528K Coil and gasket kit

The plate is larger with dimensions of 11 X 7 and the central four bolts are offset.
[nepathumb]2758[/nepathumb]


Late-style-7gpm-coil.jpg
(1.16 MiB) Viewed 68 times
View: New PagePopup • Select:BBCode
9551587 7 gpm domestic water coil; late style
Uses 3966 gasket

The plate is larger with dimensions of 11 X 7 and the central four bolts are offset. This coil uses 3/4 fittings. Behind the 3/4' fittings on the front of the plate is the area where the water inlet and outlet branch into two 1/2" coils. The branching of the tubes and their size, sometimes causes a small interference problem when installing the coil into the boiler. Depending upon the production tolerances of the coil manufacturer, it may be necessary to grind a small area of steel in the boiler coil opening, at the coil inlet and outlet areas, to allow clearance for the branched copper when installing the optional 7 gpm coil.
[nepathumb]2772[/nepathumb]


Late-style-coil-gasket.jpg
(517.17 KiB) Viewed 35 times
View: New PagePopup • Select:BBCode
3966 Coil gasket; late style
[nepathumb]2759[/nepathumb]


Late-style-coil-cover-plate.jpg
(398.75 KiB) Viewed 32 times
View: New PagePopup • Select:BBCode
5 and 7 gpm coil cover plate; late style

This plate is used when a domestic water coil is not needed and removed, such as when used with an indirect water heater. It is a flat steel plate to cover and seal the old coil opening
[nepathumb]2760[/nepathumb]


Extended-coil-flange.jpg
(500.77 KiB) Viewed 72 times
View: New PagePopup • Select:BBCode
Extended coil flange

Designed to facilitate installation and replacement of the water coil and for ease of inspection for gasket leaks. The new design allows for standard bolts and nuts to secure the water coil.
[nepathumb]2761[/nepathumb]


Extended-coil-flange-instal.jpg
(1.37 MiB) Viewed 80 times
View: New PagePopup • Select:BBCode
Fabricated extended coil flange
[nepathumb]2762[/nepathumb]


Coil-gasket-pinch.jpg
(2.2 MiB) Viewed 61 times
View: New PagePopup • Select:BBCode
Note the slight pinching of the coil gasket when it is torqued properly. It is easy to overtighten the coil nuts and bulge the gasket to the point that it breaks and leaks. The coil nuts must be snugged up at regular intervals to prevent gasket leakage. Even the slightest water leak in a boiler will greatly reduce its lifespan.
[nepathumb]2763[/nepathumb]
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: Pictorial: DF520 Domestic water coils w/part numbers

PostBy: lm1 On: Sun Feb 08, 2009 10:57 pm

Had coil replaced 2 years ago. Noticed our hot water doesn't stay hot long enough to fill bath tub.Could the coil be going again? Last time we did see a leak now nothing.We even turned up therostat thinking that was the problem. Can someone give me an idea?
lm1
 
Stove/Furnace Make: EFM

Re: Pictorial: DF520 Domestic water coils w/part numbers

PostBy: cArNaGe On: Sun Feb 08, 2009 11:51 pm

what temp is your boiler?

And which coil did you have installed the 5 or 7 gpm.
cArNaGe
 

Re: Pictorial: DF520 Domestic water coils w/part numbers

PostBy: Coal Joe On: Mon Feb 09, 2009 6:35 am

lm1 wrote:Had coil replaced 2 years ago. Noticed our hot water doesn't stay hot long enough to fill bath tub.Could the coil be going again? Last time we did see a leak now nothing.We even turned up therostat thinking that was the problem. Can someone give me an idea?


Could be Calcium Carbonate build up on the inside of the coil tubes(domestic hot water side). Probably need to acid clean the coil. Material can be purchased at a home depot, Lowes, or hardware store.
Coal Joe
 
Hot Air Coal Stoker Stove: Harman
Coal Size/Type: rice
Other Heating: oil
Stove/Furnace Make: Harman
Stove/Furnace Model: DVC500