Carrier 48HJD005-007 specifications Cooling Charging Chart Standard 48HJ006

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Fig. 46 — Cooling Charging Chart,

Fig. 46 — Cooling Charging Chart,

Standard 48HJ006

Fig. 47 — Cooling Charging Chart,

Standard 48HJ007

TO USE COOLING CHARGING CHART, STANDARD UNIT — Take the outdoor ambient temperature and read the suction pressure gage. Refer to charts to determine what

suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted.

Example (Fig. 46):

Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 F Suction Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig Suction Temperature should be. . . . . . . . . . . . . . . . . . . . . . .48 F (Suction temperature may very ± 5 F.)

If a charging device is used, temperature and pressure read- ings must be accomplished using the charging charts.

TO USE COOLING CHARGING CHARTS, UNITS WITH MOISTUREMISER DEHUMIDIFICTION PACK- AGE — Refer to charts (Fig. 48-51) to determine the proper leaving condenser pressure and temperature.

Example (Fig. 48):

Leaving Condenser Pressure. . . . . . . . . . . . . . . . . . . . . 250 psig Leaving Condenser Temperature . . . . . . . . . . . . . . . . . . . 105 F

NOTE: The MoistureMiser subcooler MUST be energized to use the charging charts.

Flue Gas Passageways — To inspect the flue collec- tor box and upper areas of the heat exchanger:

1.Remove the combustion blower wheel and motor assem- bly according to directions in Combustion-Air Blower section below.

2.Remove the 3 screws holding the blower housing to the flue cover.

3.Remove the flue cover to inspect the heat exchanger.

4.Clean all surfaces as required using a wire brush.

Combustion-Air Blower — Clean periodically to en- sure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bimonthly to deter- mine proper cleaning frequency.

To inspect blower wheel, remove draft hood and screen. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel as follows:

1.Slide burner access panel out.

2.Remove the 5 screws that attach induced-draft motor as- sembly to the vestibule cover.

3.Slide the motor and blower wheel assembly out of the blower housing. The blower wheel can be cleaned at this point. If additional cleaning is required, continue with Steps 4 and 5.

4.To remove blower from the motor shaft, by remove 2 setscrews.

5.To remove motor, remove the 4 screws that hold the mo- tor to mounting plate. Remove the motor cooling fan by removing one setscrew. Then remove nuts that hold mo- tor to mounting plate.

6.To reinstall, reverse the procedure outlined above.

Limit Switch — Remove blower access panel (Fig. 5). Limit switch is located on the fan deck.

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Contents Step 1 - Provide Unit Support CONTENTSSAFETY CONSIDERATIONS INSTALLATION1′-4″ Fig. 1 - Roof Curb DetailsFig. 3 - Condensate Drain Pan Fig. 2 - Unit Leveling TolerancesStep 7 - Make Electrical Connections Table 1 - Physical Data Table 1 - Physical Data cont 3/4″ Fig. 5 - Base Unit Dimensions - 48HJ004-0071/2″ Fig. 6 - Flue Hood Details Step 8 - Adjust Factory-Installed OptionsFig. 7 - Gas Piping Guide With Accessory Thru-the-Curb Service ConnectionsFig. 9 - Low-Voltage Connections With or Without Economizer Fig. 8 - Power Wiring ConnectionsFig. 10 - Field Control Wiring Raceway the percent of voltage imbalance Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine Table 2C - 48HJ High-Static Motor Units Without Electrical Convenience Outlet 208/230-V Unit Shown Fig. 11 - Accessory Field-Installed HumidistatFig. 14 - Outdoor-Air Hood Details Fig. 13 - Typical Access Panel LocationsFig. 15 - Durablade Economizer Installed in Unit Fig. 16 - Horizontal Durablade Economizer InstallationFig. 20 - Outdoor-Air Thermostat Enthalpy Control Installation Wiring HarnessFig. 19A - Durablade Economizer Damper Minimum Position Setting Fig. 19B - Durablade Economizer Minimum Position Damper SettingFig. 22 - Durablade Economizer Barometric Relief Damper CharacteristicsFig. 24 - Typical Access Panel Locations Fig. 25 - Exhaust Air Hood AssemblyFig. 29 - EconoMi$er Installed Fig. 28 - Rear EconoMi$er Flange InstallationFig. 26 - Outdoor-Air Hood Assembly Fig. 27 - Completed Hood AssemblyPOWER EXHAUST SYSTEM HIGH VOLTAGE Fig. 31 - EconoMi$er Sensor WiringFig. 33 - Typical Access Panel Locations Fig. 32 - Wiring Diagram for Power Exhaust SystemPotentiometers Factory Settings Fig. 34 - Supply-Air Sensor PlacementTable 4 - Default Potentiometer Settings Fig. 35 - EconoMi$er Control AdjustmentFig. 37 - Belt-Drive Motor Mounting Step 9 - Adjust Evaporator-Fan Speed - AdFig. 38 - Evaporator-Fan Pulley Adjustment Table 7 - Evaporator-Fan Motor Data - High-Static Motors Table 5A - 48HJ Fan Rpm at Motor Pulley Setting With Standard MotorTable 6 - Evaporator-Fan Motor Data - Standard Motor Bels Table 8 - Motor Nominal HorsepowerTable 9 - Outdoor Sound Power Total Unit Table 12 - 48HJ005 Fan Performance - Vertical Discharge Units With Standard Motor 3-Phase Units Single-Phase UnitsTable 16 - 48HJ007 Fan Performance - Vertical Discharge Units With Standard Motor Table 18 - 48HJ004 Fan Performance - Horizontal Discharge Units With Standard Motor Table 20 - 48HJ005 Fan Performance - Horizontal Discharge Units With Standard Motor 3-Phase Units Package Static Pressure Drop in. wg FIOP - Factory-Installed OptionTable 26 - Economizer Static Pressure Drop in. wg Table 27 - FIOP MoistureMiser DehumidificationSTART-UP PRE-START-UPTable 28 - Altitude Compensation HeatingOperating Sequence When the supply-air temperature falls between 57 F and Fig. 39 - MoistureMiser Option Operation Fig. 42 - Separating Coil Sections SERVICELubrication Fig. 40 - Cleaning Condenser Coil Fig. 41 - Propping Up Top PanelFig. 45 - Cooling Charging Chart Standard 48HJ005 Fig. 43 - Condenser-Fan AdjustmentFig. 44 - Cooling Charging Chart Standard 48HJ004 Fig. 47 - Cooling Charging Chart Standard 48HJ007 Fig. 46 - Cooling Charging Chart Standard 48HJ006Fig. 48 - Cooling Charging Chart, 48HJ004 with Optional MoistureMiser Dehumidification Package Fig. 52 - Burner Section Details Fig. 53 - Burner Tray Details Table 29 - LED Error Code Description48HJF005-007 - 150,000 BTUH INPUT Fig. 54 - Spark Gap AdjustmentLOW HEAT 48HJE004, 48HJD005-007 - 72,000 BTUH INPUT MEDIUM AND HIGH HEAT 48HJE005-007, 48HJF004 - 115,000 BTUH INPUTTable 30 - LED Error Code Service Analysis TROUBLESHOOTINGTable 32 - Durablade Economizer Service Analysis Table 31 - Heating Service AnalysisCritical Table 34 - EconoMi$er TroubleshootingTable 33 - EconoMi$er Flash Code Identification Table 35 - MoistureMiser Dehumidification Subcooler Service Analysis Compressor operates continuously Table 36 - Cooling Service Analysis208/230 3-Phase Unit Shown Fig. 55 - Typical Wiring Schematic and Component ArrangementNOTES FOR FIG LEGEND AND NOTES FOR FIGReplaces 48HJ-17SI Page III. START-UP START-UP CHECKLIST Remove and Store in Job FileI. PRELIMINARY INFORMATION II. PRE-START-UP insert checkmark in box as each item is completed
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