Closer for __________ doors shall be electromechanical and completely enclosed in a metal cover. Units shall be surface mounted to the frame face [on the pull (hinge side) on the push (opposite hinge side)] of the door [and shall project no more than 2-5/8" (67mm) from the surface of the frame]. (Closer shall be installed in the header of the frame, and the slide track mortised into the door’s top rail). Closer unit shall be hydraulic, full rack and pinion type with a cast aluminum alloy shell. Hydraulic fluid shall be non-gumming and non-freezing. Closer unit shall have two non-critical valves to independently regulate closing and latch speed. It shall also have an adjustable backcheck with a hex-key. Closer unit shall have spring power adjustment to permit a 50% increase in closing power over the minimum closing force for any size. Electromechanical Closer shall have (Infinite) (Selective) Hold Open (Free Swing Operation) and shall be able to attain a maximum opening of 180° (with hold open to 175°). Unit to be fail safe and must close the door during any electrical power interruption to the unit. (Closer/Holder to be Executive Door Holder/Release with release actuated by battery operated hand-held controller). Unit(s) to operate on (_______VAC, 60Hz) (_________ VDC) and will accept (surface) (concealed) wiring. Amperage draw shall not exceed (.086 Amps for 24VAC/DC) (.051 Amps for 120VAC) units. Supplier to coordinate electrical requirements with electrical and alarm system engineers. Wiring (and conduit) by others. Electromechanical Units to be Norton® Series 7200 (Closer/Holder) (Free Swing Releasing Device), (Executive Door Holder/Release).