Carrier 42C Series Product Data

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107Fan Coil Unit — Ducted ModelsHVAC Guide Specifications — 42DSize Range: 600 to 2000 Nominal CfmCarrier Model Numbers:42DA (Ceiling Furred-in)42DC (Ceiling Furred-in with Plenum)42DD (Vertical with Galvanized Casing)42DE (Ceiling with Galvanized Casing)42DF (Ceiling Exposed Cabinet)Part 1 — General1.01 SYSTEM DESCRIPTIONHorizontal, 2-pipe or 4-pipe or electric heat fan coilunit for ducted installations; horizontal furred-in orexposed ceiling model, ceiling cabinet, or verticalmodel with galvanized casing for closet or utilityroom installation.1.02 QUALITY ASSURANCEUnits shall be UL approved, except for 42DF. Allunits shall be CSA approved, including 42DF. Eachcoil shall be factory tested for leakage at 350 psig airpressure with coil submerged in water. Insulationand adhesive shall meet NFPA-90A requirementsfor flame spread and smoke generation. All equip-ment wiring shall comply with NEC requirements.The 42DF model shall be tested and certified inaccordance with ARI Standard 440.1.03 DELIVERY, STORAGE AND HANDLINGUnit shall be handled and stored in accordance withthe manufacturer’s instructions.Part 2 — Products2.01 EQUIPMENTA. General:Factory assembled, horizontal or vertical blow-thruducted fan coil unit. Unit shall be complete withwater coil(s), fan(s), motor(s), drain pan, andall required wiring, piping, controls and specialfeatures.B. Horizontal, Furred-in Base Unit (42DA):1. Outside panels shall be galvanized steel, linedon the inside with ½-in. thick fiberglass Tuf-Skin™ II insulation and a 1 in. long collar forsupply duct connection.2. The drain pan shall be constructed of 18-gagegalvanized steel extending the entire length andwidth of coil(s) and pitched for drainage. Theinside surface of the drain pan shall be coatedwith closed-cell, fire retardant foam. An exten-sion drain pan shall be provided for installationat the jobsite under the factory-furnished elec-tric water valves.C. Horizontal Base Unit with Plenum for ConcealedInstallation (42DC):Unit shall have a factory-installed, 18-gage galva-nized steel plenum section and 1-in. throwaway fil-ter. The plenum shall be either bottom or rearreturn, lined with ½-in. thick fiberglass Tuf-Skin IIinsulation and include a removable panel to provideaccess to the fan/motor assembly.D. Horizontal, Enclosed Unit for Concealed Installation(42DE):Unit shall be constructed of galvanized steel withremovable panels for access to internal compo-nents. Units have ½-in. fiberglass Tuf-Skin II insula-tion, filter track with 1-in. throwaway filter, 1-in.supply collar, and 2½-in. return-air collar on rear ofunit for duct connection.E. Horizontal Cabinet Unit for Exposed Installation(42DF):Unit shall be constructed of steel with arctic whitere-coatable baked enamel finish. Cabinet shall belined with ½-in. fiberglass Tuf-Skin II insulation andhave removable bottom access panel. Unit shallinclude hinged bar type return-air grille on rear ofunit with 1-in. throwaway filter and integral doubledeflection supply-air grille.F. Vertical, Enclosed Unit for Closet Installation(42DD):Unit shall be constructed of galvanized steel with½-in. fiberglass Tuf-Skin II insulation. Unit shallinclude front return-air opening with 1-in. throw-away filter and 1-in. supply-air duct collar.G. Fans:Direct-driven, double-width fan wheels shall haveforward-curved blades, and be statically and dynami-cally balanced, with scrolls and fans constructed ofgalvanized steel.H. Coils:Standard base unit shall be equipped with a 4-rowcoil for installation in a 2-pipe system. Additionalcoil depth and circuiting shall be provided for instal-lation in a 4-pipe system as described in the SpecialFeatures section. All coils shall have ½-in. coppertubes and aluminum fins spacing; Coil fins aremechanical bonded to tube joints. The copper tubescomply with the ASTM B-75. The fin thickness is0.0045-in. and tube thickness is 0.016-in. All coilsare tested with air under water and are suitable fordesign working pressures of 250 psig at 220 F.Burst tested at 350 psig.I. Controls and Safeties:Unit shall be furnished with a 3-speed, 4-positionfan switch on a wall plate for field mounting. Thefan motor(s) shall be equipped with integral, auto-matic reset thermal overload motor protection.J. Operating Characteristics:A single-circuit coil unit installed in a 2-pipe systemshall be capable of providing heating or cooling asdetermined by the operating mode of the centralwater supply system. A double circuit coil unitinstalled in a 4-pipe system shall be capable of pro-viding sequenced heating and cooling.Guide specifications — 42D series