Specifications include, but are not limited to: CUSTOM COIL, LEFT HAND, CHILLED WATER TUBES SHALL BE ROUND SEAMLESS L/2" O.D. COPPER AND BE STAGGERED IN THE DIRECTION OF AIRFLOW, TUBE WALL THICKNESS SHALL BE .0I7" AND RETURN BENDS ARE NOT ACCEPTABLE; ALL RETURN BENDS SHALL BE INDIVIDUALLY BRAZED iNTO PLACE. ALL JOINTS SHALL BE BRAZED USING HIGH.TE¡4P 5% SILVER SOLDER, FINS SURFACE SHALL CONSIST OF FLAT ALUMINUM FINS, FIN THICKNESS SHALL BE .008. FIN SPACING SHALL BE L2 FINS PER INCH. FINS SHALL HAVE FULL DRAWN COLLARS TO PROVIDE A CONTINUOUS SURFACE COVER OVER THE ENTIRE TUBE FOR MAXIMUM HEAT TRANSFER, BARE COPPER TUBE SHALL NOT BE VISIBLE BETWEEN FINS, TUBES SHALL BE MECHANICALLY EXPANDED INTO THE FINS TO PROVIDE A CONTINUOUS PRIMARY TO SECONDARY COMPRESSION BOND OVER THE ENTIRE FINNED LENGTH FOR MAXIMUM HEAT TRANSFER RATES. COIL CASTNG AND INTERHEDIATE TUBE SHEETS SHALL BE CONSTRUCTED OF MINIMUM I6 GUAGE GALVANIZED STEEL TOP AND BOTTOM FLANGES TO PROVIDE NECESSARY SÏRUCTURAL INTEGRITY FOR RIGGING AND FIELD SUPPORT OF COIL. FLANGES ON TOP AND BOTTOM OF COIL SHALL BE STACKING TYPE. TUBE SHEETS SHALL INCLUDE MULTIPLE STEP EXTRUSION PROCESS TO ENSURE A SMOOTH TUBE OPENING IS PROVIDED. CONNECTIONS SHALL BE COMPATIBLE I.¡ITH EXISTING PIPING. HEADERS SHALL BE HEAVY SEAI'ILESS COPPER. ÏHE HEADERS WILL HAVE INTRUDED TUBE HOLES TO PROVIDE A LARGE BRAZING SURFACE FOR MAXIMUM STRENGTH AND INHERENT FLEXIBILITY. HEADERS SHALL NOT EXTEND PAST THE COIL CASING. VENTS AND DRAINS I¡JILL BE FURNISHED ON ALL COIL$ AND SHALL BE COPPER FPT. VENTS SHALL BE LOCATED AT OR ABOVE THE HIGHEST TUBE AND DRAINS SHALL BE LOCATED AT OR BELOW THE LOWEST TUBE TO ALLOW FOR COMPLETE DRAINING OF THE COIL. VENT AND DRAIN EXTENSIONS TO EXTERIOR ARE NOT INCLUDED. THE COMPLETE COIL CORE SHALL BE WITNESS TESTED WIÏH 4OO PSIG AIR PRESSURE UNDER WARM WATER AND BE SUITABLE FOR OPERATION AT 250 PSIG WORKING PRESSURES, EACH ENTIRE COIL ASSEMBLY MUST BE TOTALLY SUBI'IERGED UNDER WATER. INDIVIDUAL TUBE TEST AND CORE TESÏS BEFORE INSTALLATION OF HEADERS t¡IILL NOT BE CONSIDERED SAïISFACTORY. WATER COILS SHALL BE CIRCUITED TO DRAIN COMPLETELY AND DESIGNED FOR COUNTER FLOW CONSTRUCTION. USE OF INTERNAL RESTRICTIVE DEVICES TO OBTAIN TURBULENT FLot¡ WILL NOT BE ACCEPTABLE. CoILS SHALL BE BUILT IN ACCORDANCE WITH A HRI IN A UL,/ETL RECOGNIZED FACILITY. AHRI CERTIFIED DATA HAS BEEN TESTED PER ASHRAE 33.