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Purge Non-Condensibles. Each of the above steps is discussed in detail in this instruction. Read entire instruction before starting installation. Remove four shipping bolts holding absorption unit to crate base before placing unit on permanent mounting slab. NOTE: Unit is shipped with condenser fan guard inverted. Remove, place with convex side up and fasten. I. LOCATE AND MOUNTABSORPTION UNIT The absorption unit may be located at ground level or on the roof. Consult local codes for informa