Specifications include, but are not limited to: a. Contractor shall remove and dispose of existing condensers, coils, and furnaces that will be replaced (6 units). Crane service to be included in bid. b. Contractor shall install the following: i. Two (2) 95% efficient 80,000 BTU furnaces, two (2) evaporator coils, and two (2) 3 ton 230 volt 3 phase 14 seer condensers with low ambient controls. ii. Four (4) 95% efficient 100,000 BTU furnaces, evaporator coils, and four (4) 5 ton 230 volt 3 phase 14 seer condenser with low ambient controls. c. Contractor shall connect back to existing duct work, electrical power, gas piping, control wiring, combustion air, and refrigerant lines. d. Contractor shall reuse existing copper refrigerant line. Flush lines before adding refrigerant. e. Contractor shall install new insulation on inside and outside refrigerant lines. f. Contractor shall furnish 20x25x1 pleated media filter for each new unit. g. Contractor shall pressure test, evacuate, and charge with R-410 A refrigerant. h. Contractor shall vent all furnaces through roof with PVC pipe and flashing to ensure leak protection. i. Contractor shall re-use existing roof rails for A/C units. j. Contractor shall fabricate 20” tall return boxes to fit under the furnace units for bottom air return. k. Contractor shall fabricate transition ductwork for supply plenum. l. Contractor shall install and connect six (6) new duct detectors to furnaces supplying 120 volts AC to each duct detector. Duct detectors shall be furnished by the County. Contractor shall work with a fire services company to ensure proper operation of duct detectors. Fire service company shall install to fire alarm panel. Duct detector specification sheet enclosed (Appendix A). m. Contractor to install 4’ square electrical boxes in close proximity to duct detectors. n. Contractor shall start up and ensure units are working properly. o. Manuals due at start up.
