Manuals / Carrier / Household Appliance / Heating System

Carrier 48HJ015-025 Ð Air Distribution Ð Through-the-Bottom, 48HJ017 and 025 Shown

Models: 48HJ015-025

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Fig. 6 Ð Air Distribution Ð Through-the-Bottom

Step 3 Ð Field Fabricate Ductwork Ð Secure all ducts to building structure. Use ¯exible duct connectors be- tween unit and ducts as required. Insulate and weatherproof all external ductwork, joints, and roof openings with counter ¯ashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.

Step 4 Ð Make Unit Duct Connections Ð Unit is shipped for through-the-bottom duct connections. Duct- work openings are shown in Fig. 1, 4, and 5. Duct connec- tions are shown in Fig. 6. Field-fabricated concentric duct- work may be connected as shown in Fig. 7 and 8. Attach all ductwork to roof curb and roof curb basepans.

NOTE: Do not drill in this area; damage to basepan may result in water leak.

Fig. 6 Ð Air Distribution Ð Through-the-Bottom

(48HJ017 and 025 Shown)

NOTE: Do not drill in this area; damage to basepan may result in water leak.

Fig. 7 Ð Concentric Duct Air Distribution

(48HJ017 and 025 Shown)

Step 5 Ð Install Flue Hood Ð Flue hood is shipped secured to a baffle under main control box. To install, secure ¯ue hood to access panel. See Fig. 9.

NOTE: When properly installed, ¯ue hood will line up with combustion fan housing. See Fig. 10.

NOTE: Dimensions A, A , B, and B are obtained from ®eld-supplied ceiling diffuser.

areas indicate block-off pans.

Fig. 8 Ð Concentric Duct Details

Fig. 9 Ð Flue Hood Location

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Carrier 48HJ015-025 Ð Air Distribution Ð Through-the-Bottom, 48HJ017 and 025 Shown, Ð Concentric Duct Air Distribution

Contents

INSTALLATION Step 1 Ð Provide Unit Support Installation InstructionsCONTENTS SAFETY CONSIDERATIONSDESCRIPTION ACCESSORYFig. 1 Ð Roof Curb and Horizontal Adapter Details CURBInstructions continued on page Dimension AFig. 2 Ð Horizontal Supply/Return Curb and Horizontal Adapter DetailsTable 1 Ð Physical Data Fig. 4 Ð Base Unit Dimensions, 48HJ015,017 Fig. 5 Ð Base Unit Dimensions, 48HJ025 48HJ017 and 025 Shown Fig. 6 Ð Air Distribution Ð Through-the-Bottom48HJ017 and 025 Shown Fig. 7 Ð Concentric Duct Air DistributionFig. 13 Ð Field Gas Piping Fig. 10 Ð Combustion Fan Housing LocationFig. 11 Ð Condensate Drain Details Fig. 12 Ð Condensate Drain Piping DetailsFig. 14 Ð Field Power Wiring Connections Step 8 Ð Make Electrical ConnectionsTable 2 Ð Electrical Data Fig. 15 Ð Field Control Thermostat Wiring Step 9 Ð Make Outdoor-AirInlet AdjustmentsFig. 16 Ð 25% Outdoor-AirSection Details Fig. 20 Ð Outdoor-AirHood Component Location Fig. 17 Ð Economizer Damper Assembly Ð End ViewFig. 19 Ð Economizer Motor Control Module LocationSTART-UP AIRFLOW AIRFLOW Table 4 Ð Fan Performance Data, 48HJ017 Units Table 6 Ð Air Quantity Limits Fig. 24 Ð Fan Performance Using AccessoryPower Exhaust Table 5 Ð Fan Performance Data, 48HJ025 UnitsBase Unit Operation Main Burners Removed Fig. 25 Ð Typical Gas Heating Section48HJE015, 48HJE017, and 48HJD025 Shown Fig. 26 Ð Typical Heating Section WithEvaporator Fan, 48HJ017,025 Units Fig. 28 Ð Evaporator-FanAlignment and AdjustmentFig. 29 Ð 48HJ015 Evaporator-Fan Motor Adjustment Evaporator Fan, 48HJ015 Units48HJ015,017 Fig. 32 Ð Condenser-FanAdjustment Belt Tension Adjustment Ð To adjust belt tensionCondenser-FanAdjustment Motor Section Fig. 31 Ð Condenser Fan AdjustmentTable 9 Ð High and Low Outdoor-AirTemperature Table 8 Ð Economizer Checkout ProceduresFig. 33 Ð Cooling Charging Chart, 48HJ015 Fig. 35 Ð Cooling Charging Chart, 48HJ025 Pilot AdjustmentGas Valve Adjustment Fig. 34 Ð Cooling Charging Chart, 48HJ017Protective Devices Fig. 38 Ð Typical Wiring Schematic 48HJ025 Shown Page Page LEGEND FOR FIG. 38 and Page Page PACKAGED SERVICE TRAINING Page PRESSURES START-UPCHECKLISTTEMPERATURES ELECTRICAL