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.
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- 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]
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- 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]
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- 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
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- 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]
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- 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]
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- 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]
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- 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.
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