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la MAKE <br /> Features and Benefits <br /> Supply/Return Air Smoke Detector <br /> With this option installed, if smoke is detected, all unit operation will be shut down. Reset will be manual <br /> at the unit. In order for the supply air smoke detector or return air smoke detector to properly sense <br /> smoke in the supply air stream or the return air stream,the air velocity entering the smoke detector unit <br /> must be between 500 to 4000 feet per minute. Equipment covered in this manual will develop an airflow <br /> velocity that falls within these limits over the entire airflow range specified in the evaporator fan <br /> performance table. Supply and/or return smoke detectors may not be used with the plenum smoke <br /> detector. <br /> Figure 1. Supply/Return air smoke detector <br /> 01. i <br /> 1 <br /> ►.AW-1� <br /> 4 <br /> • <br /> I, <br /> Through-the-Base Condensate <br /> 6 to 12.5 tons unit includes provisions for through-the-base condensate drain connections.This allows <br /> the drain to be connected through the roof curb instead of a roof penetration. <br /> Through-the-Base Electrical Access <br /> An electrical service entrance shall be provided allowing electrical access for both control and main <br /> power connections inside the curb and through-the-base of the unit.Option will allow for field installation <br /> of liquid-tight conduit and an external field installed disconnect switch. <br /> Through-the-Base Gas Piping <br /> Factory provided through-the-base openings simplify wiring and piping. Because these utility openings <br /> frequently minimize the number of roof penetrations,the integrity of roofing materials is enhanced. <br /> This option shall have all piping necessary including, black steel, manual gas shut-off valve,elbows,and <br /> union.This assembly will require minor field labor to install. <br /> Ventilation Override <br /> Ventilation override allows the unit to be set to transition to up to three different pre-programmed <br /> sequences for smoke purge, pressurization,and exhaust.The transition occurs when a binary input on <br /> the Customer Connection Module is closed (shorted).This would typically be a hard wired relay output <br /> from a smoke detector or fire control panel.The Customer Connection module that allows ventilation <br /> override is available as a field installed accessory(FIASCCM001). For more information on functionality, <br /> reference SymbioTm 700 Controller with PrecedentTM Packaged Rooftop Air-Conditioners Application <br /> Guide(ACC-APG002*-EN). <br /> RT-PRC098B-EN 15 <br />