Carrier SINGLE PACKAGE ROOFTOP UNITS ELECTRIC COOLING/GAS User Manual

Installation InstructionsCONTENTSPageSAFETY CONSIDERATIONS ...1INSTALLATION ...1-12Step 1 — Provide Unit Sup

Use the following formula to determine the percent volt-age imbalance.% Voltage Imbalance:= 100 xmax voltage deviation from average voltageaverage vol

5. Loosen sheet metal screws for top cover of base unitlocated above outdoor-air inlet opening.6. Match notches in hood top cover with unit top cover

START-UPUse the following information and Start-Up Checkliston page CL-1 to check out unit PRIOR to start-up.Unit Preparation — Check that unit has be

Table 3A — Fan Performance Data, 48HJ015, 208/230, 460-V UnitsAIRFLOW(CFM)EXTERNAL STATIC PRESSURE (in. wg)0.2 0.4 0.6 0.8 1.0Rpm Watts Bhp Rpm Watts

Table 3B — Fan Performance Data, 48HJ015, 575-V UnitsAIRFLOW(CFM)EXTERNAL STATIC PRESSURE (in. wg)0.2 0.4 0.6 0.8 1.0Rpm Watts Bhp Rpm Watts Bhp Rpm W

Table 4 — Fan Performance Data, 48HJ017 UnitsAIRFLOW(CFM)EXTERNAL STATIC PRESSURE (in. wg)0.2 0.4 0.6 0.8 1.0Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

Table 5 — Fan Performance Data, 48HJ025 UnitsAIRFLOW(CFM)EXTERNAL STATIC PRESSURE (in. wg)0.2 0.4 0.6 0.8 1.0Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

Table 7 — Accessory/FIOP Economizer Static Pressure (in. wg)UNIT480HJUNITVOLTAGECFMECONOMIZERPRESSURE DROP015, 017 All3,750 .034,000 .035,000 .056,000

SERVICEBefore performing service or maintenance operations onunit, turn off main power switch to unit. Electrical shockcould cause personal injury.Cle

FAN SHAFT BEARINGS — For 015 units, the bearings arepermanently lubricated. No field lubrication is required. For017 and 025 units, the bearings are of

ACCESSORYPACKAGE NO.CURBHEIGHTDESCRIPTION ‘‘A’’ ‘‘B’’ ‘‘C’’50PQ90022118-29(305)Standard Curb —149 High———50PQ90014128-09(610)Standard Curbfor Units Re

SERVICE AND REPLACEMENT (See Fig. 30) — The48HJ017,025 units use a fan motor mounting system thatfeatures a slide-out motor mounting plate. To replace

5. Set the outdoor-air thermostat (OAT), located in the econo-mizer section of the unit to 75 F.6. If the outdoor temperature is below 75 F, the econo

Pilot Adjustment1. Set system selector switch at OFF position to shut off unit.Turn off power to unit.2. Remove screw cap cover on pilot gas valve to

Main Burners — For most applications, main burnersare factory set and should require no adjustment. However,if burner adjustment is necessary:1. Perfo

Fig. 38 — Typical Wiring Schematic (48HJ025 Shown)24

Fig. 38 — Typical Wiring Schematic (48HJ025 Shown) (cont)25

Fig. 39 — Typical Component Arrangement (48HJ025 Shown)26

LEGEND FOR FIG. 38 and 39AHA — Adjustable Heat AnticipatorBKR W/AT — Breaks with Amp TurnsC—Contactor, CompressorCB — Circuit BreakerCC — Cooling Comp

ALTERNATE UNIT SUPPORT — When the curb cannotbe used, install unit on a noncombustible surface. Supportunit with sleepers, using unit curb support are

PACKAGED SERVICE TRAININGOur packaged service training programs provide an excellent way to increase your knowledge of theequipment discussed in this

START-UP CHECKLISTMODEL NO.:DATE:SERIAL NO.:TECHNICIAN:PRE-START-UP:M VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNITM REMOVE ALL SHIPPI

Table 1 — Physical DataUNIT SIZE 48HJD015/HJE015HJE017 HJD025208/230, 460 V 575 VOPERATING WT (lb)Al/Al* 1640/1660 2010 2235Unit Al/Cu* 1770/1790 2160

UNIT48HJMAXIMUM SHIPPING WEIGHTLb KgD015 1920 871E015 1940 880E017 2310 1048UNIT48HJDIMENSIONSXYFt-in. mm Ft-in. mmD015 3-2 965 4-0 1219E015 3-2 965 4

MAXIMUM SHIPPING WEIGHTLb Kg2535 1150NOTES:1. Dimensions in ( ) are in millimeters.2. Center of gravity.3. Direction of airflow.4. Ductwork to be attac

Step 3 — Field Fabricate Ductwork — Secure allducts to building structure. Use flexible duct connectors be-tween unit and ducts as required. Insulate a

Step6—TrapCondensate Drain — See Fig. 11for drain location. One3⁄4-in. half coupling is providedinside unit evaporator section for condensate drain co

Step 8 — Make Electrical ConnectionsFIELD POWER SUPPLY — Unit is factory wired for volt-age shown on unit nameplate.When installing units, provide a d