Carrier SINGLE PACKAGE ROOFTOP 48HC Installation Instructions Manual

Also see for 48TC*D: Service and maintenance instructions Installation instructions

9INSTALLATIONJobsite SurveyComplete the following checks before installation.1. Consult local building codes and the NEC (NationalElectrical Code) ANSI/NFPA 70 for special installa-tion requirements.2. Determine unit location (from project plans) or selectunit location.3. Check for possible overhead obstructions which mayinterfere with unit lifting or rigging.Step 1 — Plan for Unit LocationSelect a location for the unit and its support system (curbor other) that provides for the minimum clearancesrequired for safety. This includes the clearance tocombustible surfaces, unit performance and service accessbelow, around and above unit as specified in unitdrawings. See Fig. 4.NOTE: Consider also the effect of adjacent units.36” (914)42” (1067)42” (1067)36” (914)96” (2438)C10638Fig. 4 -- Service Clearance Dimensional DrawingBe sure that the unit is installed such that snow will notblock the combustion air intake or flute outlet.Unit may be installed directly on wood flooring or on ClassA, B, or C roof--covering material when roof curb is used.Do not install unit in an indoor location. Do not locate airinlets near exhaust vents or other sources of contaminatedair. For proper unit operation, adequate combustion andventilation air must be provided in accordance withSection 5.3 (Air for Combustion and Ventilation) of theNational Fuel Gas Code, ANSI Z223.1 (AmericanNational Standards Institute) and NFPA (National FireProtection Association) 54 TIA----54----84----1. In Canada,installation must be in accordance with the CAN1----B149installation codes for gas burning appliances.Although unit is weatherproof, avoid locations that permitwater from higher level runoff and overhangs to fall ontothe unit.Locate mechanical draft system flue assembly at least 4 ft(1.2 m) from any opening through which combustionproducts could enter the building, and at least 4 ft (1.2 m)from any adjacent building (or per local code). Locate theflue assembly at least 10 ft (3.05 m) from an adjacentunit’s fresh air intake hood if within 3 ft (0.91 m) of sameelevation (or per local code). When unit is locatedadjacent to public walkways, flue assembly must be atleast 7 ft (2.1 m) above grade.Select a unit mounting system that provides adequateheight to allow installation of condensate trap perrequirements. Refer to Step 11 — Install ExternalCondensate Trap and Line – for required trap dimensions.Roof Mount —Check building codes for weight distributionrequirements. Unit operating weight is shown in Table 1.Table 1 – Operating Weights48HC** UNIT LB (KG)17 20 24 28Base Unit 1892 (858) 2102 (954) 2247 (1019) 2292 (1040)Economizer 245 (111) 245 (111) 245 (111) 245 (111)Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)Humidi--- MiZerR System 83 (38) 83 (38) 88 (40) 92 (42)Curb14--- in/356 mm 273 (124) 273 (124) 273 (124) 273 (124)24--- in/610 mm 350 (159) 350 (159) 350 (159) 350 (159)48HC