The main gym lobby RTUs at Sequoyah High School are in need of replacement. The two (2) 20-Ton ground mounted RTUs are located on the front corners near the entry of the lobby and are connected to the building duct system with exterior manufactured galvanized steel ducting and are weather sealed. The existing RTUs are natural gas fueled. The existing RTUs are connected to a building automation system (BAS), and the replacement equipment will need to be compatible with the BAS. Ionization air purification devices will be added to the duct system as a duct accessory. Removal & disposal of existing units and installation of new units is part of the bid. The pads for these units are elevated and will require usage of a Crane to lift existing and new units. Trane, 20 Ton Packaged Precedent Unitary Rooftop. Model # YSK240A4S0H preferred. Replacement equipment will include: VFD Controlled Evaporator Motor 100% Economizer Factory Hail Guards Hinged Access Doors Low Ambient Kit R-454B Refrigerant Powered Exhaust 3-Phase Configuration: 460 Volt Manufacturer Factory One (1) Year Labor Warranty Factory Extended Compressor Warranty to Ten (10) Years Factory Extended Heat Exchanger Warranty to Ten (10) Years