Aerco KC Series Installation, Operation & Maintenance Instructions Manual page 43

Gas fired installation, operation & maintenance instructions water heating system

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Enlarged version

Figure 6.20

Concave Style Head

8. Place the shell gasket then the release

gasket on top of the shell ring and align the

gasket holes with those in the flange.

9. Place the upper head liner (dimple facing

in/down) on top of the gasket, with all holes

aligned. Then place the upper head on the

upper head liner.

10. Place the upper head ring on top of the

upper head.

11. Reassemble the studs and nuts through the

upper head and shell ring. Cross tighten the

nuts to approximately 75 ft./lb, to obtain

uniform seating, and then progressively

tighten the nuts to 150 ft./lb.

MAINTENANCE

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