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Replacing Thermostatic Bulb

Unscrew bulb from duct and valve assembly. Remove metal shims from old bulb and place them on new bulb.

NOTE: Do not alter size of shim pack.

No bulb adjustment is provided and separate shims will not be serviced. Coat new bulb threads with soft setting sealer and screw into duct and valve assembly. Check operation of duct and valve assembly as described above.