Carrier 48GS Guide- Manuals

6 Factory-installed optionsLouvered grille provides hail and vandalism protection. A wire grille is standard on all models. See model number nomenclaturefor louvered grille options. C o i l o p t i o n s i n c l u d e c o p p e r / c o p p e r a n d v i n y l - c o a t e d construction for refrigera...

10 UNIT SIZE A in. [mm] B in. [mm] C in. [mm] D in. [mm] FLAT CURB 018-042 CPRFCURB006A00 8 [203] 11 27 / 32 [301] 30 5 / 8 [ 778] 28 3 / 4 [ 730] CPRFCURB007A00 14 [356] 11 27 / 32 [301] 30 5 / 8 [ 778] 28 3 / 4 [ 730] 048,060 CPRFCURB008A00 8 [203] 15 27 / 32 [402] 42 1 / 8 [1070] 40 1 / 4 [1022] ...

11 Selection procedure (with example) I Determine cooling and heating requirements at designconditions:Given: . . . Required Cooling Capacity (TC) ....................34,000 Btuh. . . Sensible Heat Capacity (SHC) ........................25,000 Btuh. . . Required Heating Capacity .......................

12 Performance data NET COOLING CAPACITIES See Legend and Notes on page 14. 48GS018 Temp (F) Outdoor Air Entering Condenser Evaporator Air — CFM/BF 525/0.118 600/0.159 675/0.187 Evaporator Air — Ewb (F) 62 67 72 62 67 72 62 67 72 85 TC 15.7 18.5 20.9 16.5 19.2 21.5 17.2 19.8 21.9 SHC 13.5 11.6 9.5 1...

15 DRY COIL AIR DELIVERY* — HORIZONTAL AND DOWNFLOW DISCHARGE (Deduct 10% for 208 v) *Air delivery values are without air filter and are for dry coil. (See Wet Coil Pressure Drop table.) NOTE: Deduct field-supplied air filter pressure drop or economizer and 1-in. filter pressure drop andwet coil pre...

17 HIGH ALTITUDE COMPENSATION NATURAL GAS ONLY ORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE* * As the height above sea level increases, there is less oxygen per cubic ft of air. Therefore heat input rate should be reduced at higher altitudes. † Orifices available through your Carrier distributo...

18 Typical piping and wiring VERTICAL DISCHARGE HORIZONTAL DISCHARGE NEC — National Electrical Code INDOORTHERMOSTAT DISCONNECTPER NEC* FROMPOWERSOURCE RETURNAIR TOP COVER FROMGAS LINE *NEC - NATIONAL ELECTRICAL CODE

19 Condensate trap — A 2-in. condensate trap must be fieldsupplied.Ductwork — Secure downflow discharge ductwork to roofcurb. For horizontal discharge applications, attach ductwork tounit with flanges.To convert a unit to downflow discharge — Units aree q u i p p e d w i t h factory-installed ins er...

23 452 = 5 v 457 = 7 v455 = 2 v LEGEND FLA — Full Load Amps LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent ProtectionRLA — Rated Load Amps NOTES:1. In compliance with NEC (National Electrical Code) requirements for multimotor and combination load equipment (refer to NE...

24 Controls Operating sequence Heating — When the thermostat calls for heating, terminal“W” is energized, starting the induced draft motor. When thehall-effect sensor on the induced-draft motor senses that it hasreached the required speed, the burner ignition sequence begins.The indoor (evaporator) ...

25 Packaged Heating/Cooling UnitsConstant Volume ApplicationHVAC Guide Specifications Size Range: 1-1/2 to 5 Tons, Nominal Cooling40,000 to 130,000 Btuh,Nominal Heating Input Carrier Model Number: 48GSPart 1 — GeneralSYSTEM DESCRIPTION Outdoor rooftop mounted, gas heating/electric cooling unitutiliz...