Carrier 48GS Guide User Manual

Copyright 2000 Carrier Corporation Form 48GS-3PD ProductData 48GS/48GSNSingle-PackageGas Heating/Electric CoolingUnits 1 1 / 2 to 5 Nominal Tons Sin

10UNIT SIZEAin. [mm]Bin. [mm]Cin. [mm]Din. [mm]FLATCURB 018-042CPRFCURB006A00 8 [203] 1127/32[301] 305/8[ 778] 283/4[ 730]CPRFCURB007A00 14 [356] 1

11Selection procedure (with example)I Determine cooling and heating requirements at designconditions:Given:. . . Required Cooling Capacity (TC) ...

12Performance dataNET COOLING CAPACITIESSee Legend and Notes on page 14.48GS018Temp (F)Outdoor AirEnteringCondenserEvaporator Air — CFM/BF525/0.118 60

13Performance data (cont)NET COOLING CAPACITIES (cont)See Legend and Notes on page 14.48GS036Temp (F)Outdoor AirEnteringCondenserEvaporator Air — CFM/

14Performance data (cont)NET COOLING CAPACITIES (cont)48GS060Temp (F)Outdoor AirEnteringCondenserEvaporator Air — CFM/BF1750/0.039 2000/0.053 2250/0.0

15DRY COIL AIR DELIVERY* — HORIZONTAL AND DOWNFLOW DISCHARGE(Deduct 10% for 208 v)*Air delivery values are without air filter and are for dry coil. (S

16Performance data (cont)ECONOMIZER/1-IN. FILTER PRESSURE DROPWET COIL PRESSURE DROPOUTDOOR SOUND: OCTAVE BAND DATA — DECIBELSLEGENDBels — Sound Level

17HIGH ALTITUDE COMPENSATIONNATURAL GAS ONLYORIFICE CONVERSION — 3.5 in. wg MANIFOLD PRESSURE** As the height above sea level increases, there is less

18Typical piping and wiringVERTICAL DISCHARGEHORIZONTAL DISCHARGENEC — National Electrical CodeINDOORTHERMOSTATDISCONNECTPER NEC*FROMPOWERSOURCERETU

19Condensate trap — A 2-in. condensate trap must be fieldsupplied.Ductwork — Secure downflow discharge ductwork to roofcurb. For horizontal discharge ap

2 Energy-saving, direct spark ignition saves gas by operating only when the room thermostat calls for heating. Standard units are furnished with nat

20Typical wiring schematics, 48GS018-060NOTES:1. If any of the original wires furnished are replaced, they must bereplaced with type 90 degree C wire

21Typical wiring schematics, 48GS030-060COOLING FAN LOGICENERGIZED DE-ENERGIZEDENERGIZED DE-ENERGIZEDHEATING FAN LOGICFIELDSUPPLYPOWERW54 BLKW

22COOLING FAN LOGICENERGIZED DE-ENERGIZEDENERGIZED DE-ENERGIZEDHEATING FAN LOGICFIELDSUPPLYPOWERW54 BLKW55 YELEQUIP_GNDW15 YELW14 BLKPRIMARY46

23452=5v457=7v455=2vLEGENDFLA — Full Load AmpsLRA — Locked Rotor AmpsMCA — Minimum Circuit AmpsMOCP — Maximum Overcurrent ProtectionRLA — Rated Load A

24ControlsOperating sequenceHeating — When the thermostat calls for heating, terminal“W” is energized, starting the induced draft motor. When thehall-

25Packaged Heating/Cooling UnitsConstant Volume ApplicationHVAC Guide SpecificationsSize Range: 1-1/2 to 5 Tons, Nominal Cooling40,000 to 130,000 Btuh

262. Compressor with standard controls shall be capableof operation down to 55°F ambient outdoor temper-ature.3. Units shall be provided with fan time

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Carrier Corporation • Indianapolis, IN 46231 3-00Manufacturer reserves the right to discontinue, or change at any time, specifications or designs with

3 LEGEND AL — Aluminum CU — Copper*The 048 unit is 208-230/1/60. Minimum voltage of 197 at maximum load conditions. COOLING CAPACITIES AND EFFICIEN

4 ARI capacities (cont) LEGEND AFUE — Annual Fuel Utilization EfficiencyNOTE: Before purchasing this appliance, read important energy costand efficien

5 Physical data * Based on altitude of 0 to 2000 feet.†Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigerat

6 Factory-installed optionsLouvered grille provides hail and vandalism protection. A wiregrille is standard on all models. See model number nomencla

7ECONOMIZERFILTER RACKDAMPERBLADEMANUAL OUTSIDEAIR HOODREPLACEMENTPANELMANUAL OUTSIDE AIR DAMPER

8REQ’D CLEARANCES FOR OPERATION AND SERVICING. in. (mm)Evaporator coil access side ...36(914)Power entry side (except for NEC require

9Base unit dimensions – 48GS042-060REQ’D CLEARANCES FOR OPERATION AND SERVICING. in. (mm)Evaporator coil access side ......36(914)Power en