Carrier 42C Series Product Data

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109Fan Coil Unit — Vertical Stack ModelsHVAC Guide Specifications — 42SSize Range: 300 to 1200 Nominal CfmCarrier Model Numbers:42SGA (Furred-in)42SHA (Cabinet)42SJA (Furred-in, Back-to-Back)Part 1 — General1.01 SYSTEM DESCRIPTIONStack fan coil units, 2-pipe, 4-pipe or electric heatfor furred-in or exposed cabinets that are floormounted in multi-story buildings.1.02 QUALITY ASSURANCEUnits shall be tested and certified in accordance withARI standard 440, latest edition. All units shall beUL and CSA approved. Each coil shall be factorytested for leakage at 350 psig air pressure with coilsubmerged in water. Insulation and adhesive shallmeet NFPA-90A requirements for flame spread andsmoke generation. All equipment wiring shall com-ply with NEC requirements.1.03 DELIVERY, STORAGE AND HANDLINGUnit shall be handled and stored in accordance withthe manufacturer’s instructions.Part 2 — Products2.01 EQUIPMENTA. General:Factory assembled, stack fan coil units. Units arecomplete with water coil(s), fan(s), motor(s), drainpan, and all required wiring, piping, controls, andspecial features.B. Cabinet Stack Unit (42SH):Outside panels are made of 18-gage galvanized steelcoated with baked-on enamel finish and are fabri-cated with no exposed fasteners. The interior sur-faces shall be lined with ½-in. thick fiberglassTuf-Skin™ II insulation. The standard cabinet unithas factory-installed double deflection dischargegrille(s) and stamped supply grille. Controls are fac-tory wired and mounted in small access panel atfront of unit.C. Furred-In Stack Unit (42SG):The unit shall be constructed of 18-gage galvanizedsteel frame and 18-gage galvanized steel back panel.The fan coil is open or enclosed for furred-in instal-lation. These units are designed to have the wall-board applied directly to the unit surface and allopenings have standard ½-in. thick fiberglass Tuf-Skin II insulation. Units have double deflection alu-minum discharge grille(s) and painted, stamped(standard) or bar-type aluminum (optional) return-airgrille panel. Removable return-air grille providesaccess to all internal piping and wiring. Controls areprovided with a quick disconnect plug for field-mounting on front of unit.D. Back-To-Back Furred-In Stack Units (42SJ):The open unit shall be constructed of 18-gage galva-nized steel frame and 18-gage galvanized steel backpanel. These units are similar to the 42SG but areactually two completely separate units contained inone cabinet that share a common set of risers.These units are designed to have the wallboarddirectly applied to the unit surface and openingshave standard ½-in. drywall flanges. The interiorsurfaces shall be lined with ½-in. thick fiberglass Tuf-Skin II insulation. Units have double deflection alu-minum supply grille(s) and painted, stamped (stan-dard) or bar-type aluminum (optional) return-airgrille panel. Removable return-air grille providesaccess to all internal piping and wiring. Controls areprovided with a quick disconnect plug for field-mounting on front of unit.E. Drain Pan:Drain pan shall be formed of 18-gage steel and shallbe coated inside with fire-retardant closed-cell foaminsulation. Water never touches the metal pan elimi-nating the possibility of corrosion. The drain is fac-tory piped to the drain riser that has a removable“P-trap” allowing easy cleaning.F. Filter:A filter track complete with 1-in. fiberglass throw-away filter shall be installed in the unit. Optional per-manent filters are available.G. Fan:1. Centrifugal fan shall be directly-driven by anelectric motor.2. Fan wheel shall be double-width type withforward-curved blades and shall be statically anddynamically balanced.3. Fan wheel and scroll shall be constructed of gal-vanized steel.H. Coil:1. Standard base unit shall be equipped with a3-row for installation in a 2-pipe system. Addi-tional coil depth and circuiting shall be providedfor installation in a 4-pipe system as describedin the Special Features section.2. All coils shall have ½-in. copper tubes and alu-minum fins spacing; Coil fins are mechanicalbonded to tube joints. The copper tubes complywith the ASTM B-75. The fin thickness is0.0045-in. and tube thickness is 0.016-in. Allcoils are tested with air under water and aresuitable for design working pressures of250 psig at 220 F. Burst tested at 350 psig.3. Coil shall be equipped with a manual air ventand shall be piped to supply and returnrisers with valves as specified on the equipmentdrawings.4. Piping between coil and risers shall includeloops to compensate for maximum riser expan-sion and contraction of 1 1/ 2 inches.Guide specifications — 42S series