Manuals / Carrier / Household Appliance / Heating System

Carrier 48HJ015-025 Ð Combustion Fan Housing Location, Ð Condensate Drain Details

Models: 48HJ015-025

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Fig. 10 Ð Combustion Fan Housing Location

PRESSURE

SWITCH

COMBUSTION

FAN HOUSING

HEAT

EXCHANGER

SECTION

Fig. 10 Ð Combustion Fan Housing Location

Step 6 Ð Trap Condensate Drain Ð See Fig. 11 for drain location. One 3¤4-in. half coupling is provided inside unit evaporator section for condensate drain connec- tion. An 81¤2 in. x 3¤4-in. diameter and 2-in. x 3¤4-in. diameter pipe nipple, coupled to standard 3¤4-in. diameter elbows, pro- vides a straight path down through hole in unit base rail (see Fig. 12). A trap at least 4-in. deep must be used.

Step 7 Ð Install Gas Piping Ð Unit is equipped for use with natural gas. Installation must conform with local building codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1.

Install manual gas shutoff valve with a 1¤8-in. NPT pres- sure tap for test gage connection at unit. Field gas piping must include sediment trap and union. See Fig. 13.

Do not pressure test gas supply while connected to unit. Always disconnect union before servicing.

Natural gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13.5 in. wg.

Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connec- tion (3¤4-in. NPT).

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3/4" FPT DRAIN	1-3/8"
CONNECTION	DRAIN HOLE

Fig. 11 Ð Condensate Drain Details

Fig. 12 Ð Condensate Drain Piping Details

Fig. 13 Ð Field Gas Piping

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Carrier 48HJ015-025 Ð Combustion Fan Housing Location, Ð Condensate Drain Details, Ð Condensate Drain Piping Details

Contents

Installation Instructions CONTENTSSAFETY CONSIDERATIONS INSTALLATION Step 1 Ð Provide Unit SupportACCESSORY Fig. 1 Ð Roof Curb and Horizontal Adapter DetailsCURB DESCRIPTIONDimension A Fig. 2 Ð Horizontal Supply/Return Curband Horizontal Adapter Details Instructions continued on pageTable 1 Ð Physical Data Fig. 4 Ð Base Unit Dimensions, 48HJ015,017 Fig. 5 Ð Base Unit Dimensions, 48HJ025 Fig. 6 Ð Air Distribution Ð Through-the-Bottom 48HJ017 and 025 ShownFig. 7 Ð Concentric Duct Air Distribution 48HJ017 and 025 ShownFig. 10 Ð Combustion Fan Housing Location Fig. 11 Ð Condensate Drain DetailsFig. 12 Ð Condensate Drain Piping Details Fig. 13 Ð Field Gas PipingTable 2 Ð Electrical Data Step 8 Ð Make Electrical ConnectionsFig. 14 Ð Field Power Wiring Connections Fig. 16 Ð 25% Outdoor-AirSection Details Step 9 Ð Make Outdoor-AirInlet AdjustmentsFig. 15 Ð Field Control Thermostat Wiring Fig. 17 Ð Economizer Damper Assembly Ð End View Fig. 19 Ð Economizer Motor ControlModule Location Fig. 20 Ð Outdoor-AirHood Component LocationSTART-UP AIRFLOW AIRFLOW Table 4 Ð Fan Performance Data, 48HJ017 Units Fig. 24 Ð Fan Performance Using Accessory Power ExhaustTable 5 Ð Fan Performance Data, 48HJ025 Units Table 6 Ð Air Quantity LimitsBase Unit Operation Fig. 25 Ð Typical Gas Heating Section 48HJE015, 48HJE017, and 48HJD025 ShownFig. 26 Ð Typical Heating Section With Main Burners RemovedFig. 28 Ð Evaporator-FanAlignment and Adjustment Fig. 29 Ð 48HJ015 Evaporator-Fan Motor AdjustmentEvaporator Fan, 48HJ015 Units Evaporator Fan, 48HJ017,025 UnitsBelt Tension Adjustment Ð To adjust belt tension Condenser-FanAdjustmentMotor Section Fig. 31 Ð Condenser Fan Adjustment 48HJ015,017 Fig. 32 Ð Condenser-FanAdjustmentFig. 33 Ð Cooling Charging Chart, 48HJ015 Table 8 Ð Economizer Checkout ProceduresTable 9 Ð High and Low Outdoor-AirTemperature Pilot Adjustment Gas Valve AdjustmentFig. 34 Ð Cooling Charging Chart, 48HJ017 Fig. 35 Ð Cooling Charging Chart, 48HJ025Protective Devices Fig. 38 Ð Typical Wiring Schematic 48HJ025 Shown Page Page LEGEND FOR FIG. 38 and Page Page PACKAGED SERVICE TRAINING Page START-UPCHECKLIST TEMPERATURESELECTRICAL PRESSURES