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8. Tanks and pressure vessels. <br /> 9. Strainers,filters,humidifiers,water treatment systems and similar equipment. <br /> B. Optional Sign Types: Where lettering larger than 1"height is needed for proper identification,because of distance <br /> from normal location of required identification, stenciled signs may be provided in lieu of engraved plastic, at <br /> Installer's option. <br /> C. Lettering Size: Minimum 1/4" high lettering for name of unit where viewing distance is less than 2'-0", 1/2"high <br /> for distances up to 6-0", and proportionately larger lettering for greater distances. Provide secondary lettering 2/3 <br /> to 3/4 of size of principal lettering. <br /> D. Text of Signs: In addition to name of identified unit,provide lettering to distinguish between multiple units,inform <br /> operator of operational requirements,indicate safety and emergency precautions,and wam of hazards and improper <br /> operations. <br /> E. Optional Use of Plasticized Tags: At Installer's option, where equipment to be identified is concealed above <br /> acoustical ceiling or similar concealment,plasticized tags may be installed within concealed space to reduce amount <br /> of text in exposed sign(outside concealment). <br /> 1. Operational valves and similar minor equipment items located in non-occupied spaces (including machine <br /> rooms) may, at Installer's option, be identified by installation of plasticized tags in lieu of engraved plastic <br /> signs. <br /> 3.07 ADJUSTING AND CLEANING <br /> A. Adjusting: Relocate any mechanical identification device which has become visually blocked by work of this <br /> division or other divisions. <br /> B. Cleaning: Clean face of identification devices,and glass frames of valve charts. <br /> END OF SECTION 15190 <br /> 15190-8 No.99132-CP2 <br />