Carrier Comprehensive Guide on Air Conditioner Maintenance and Repair
Page 29

REMOVAL AND REPLACEMENT OF GAS TRAIN (Fig. 45 and 46)

1.Shut off manual gas valve.

2.Shut off power to unit.

3.Slide out burner section side panel (not shown).

4.Disconnect gas piping at unit gas valve.

5.Remove wires connected to gas valve. Mark each wire.

6.Remove wires from ignitor and sensor wires at the Inte- grated Gas Unit Controller (IGC).

7.Remove the 2 screws that attach the burner rack to the vestibule plate.

8.Slide the burner tray out of the unit (Fig. 46).

9.To reinstall, reverse the procedure outlined above.

CLEANING AND ADJUSTMENT

1.Remove burner rack from unit as described in Removal and Replacement of Gas Train section, above.

2.Inspect burners; if dirty, remove burners from rack.

3.Using a soft brush, clean burners and cross-over port as required.

4.Adjust spark gap. See Fig. 47.

5.Reinstall burners on rack.

6.Reinstall burner rack as described in Removal and Re- placement of Gas Train section, this page.

Replacement Parts Ð A complete list of replace- ment parts may be obtained from any Carrier distributor upon request.

ROLLOUT

SWITCH

BURNER

SECTION

FLUE

EXHAUST

VESTIBULE

PLATE

INDUCED-DRAFT

MOTOR

MANIFOLD

PRESSURE TAP

GAS VALVE

Fig. 45 Ð Burner Section Details

Fig. 46 Ð Burner Tray Details

29

Page 28 Page 30
Image 29
Page 28 Page 30
Contents Installation, Start-Up Service Instructions Horizontal Conversion Panels Install External Trap for Condensate``D ALT Drain Hole Accessory Power Control ConnectorUnit Size GAS Connection PackageUnit Leveling Tolerances Physical Data Freeze Protection Thermostat F² Furnace SectionOUTDOOR-AIR Inlet Screens RETURN-AIR FiltersBase Unit Dimensions Flue Hood Details Make Electrical ConnectionsElectrical Data IFC CompsTypical Unit Adjust Factory-Installed OptionsPosition Setting Durablade Economizer Installed in Unit Durablade Economizer Damper Minimum Position Setting Parablade Economizer Installed in Unit Enthalpy Settings for Parablade Economizer Unit Motor Pulley Turns Open Motor Data Evaporator-Fan Motor EfficiencyEconomizer Static Pressure Drop in. wg Airflow Fan Performance, 48TJ008 Ð Vertical Discharge UnitsFan Performance, 48TJ009 Ð Vertical Discharge Units Fan Performance, 48TJ014 Ð Vertical Discharge Units Fan Performance, 48TJ012 Ð Vertical Discharge UnitsFan Performance, 48TJ009 Ð Horizontal Discharge Units Fan Performance, 48TJ008 Ð Horizontal Discharge UnitsFan Performance, 48TJ014 Ð Horizontal Discharge Units Fan Performance, 48TJ012 Ð Horizontal Discharge UnitsHeating START-UPElevation Altitude CompensationNominal Input Lubrication Cleaning Condenser CoilFAN Height ``A Condenser-Fan Adjustment Fig48TJ Unit Voltage Cooling Charging Chart 48TJ009 LED Indication Error Code Description LED Error Code DescriptionOFF Flash²Burner Section Details Spark Gap Adjustment LED OFF LED Error Code Service AnalysisProblem Cause Remedy Problem Cause Remedy Durablade Economizer TroubleshootingParablade Economizer Service Troubleshooting Cooling Service Troubleshooting Heating Service Troubleshooting Typical Wiring Schematic and Component Arrangement Page Copyright 1996 Carrier Corporation Page Preliminary Information Remove and Store in Job File

48TJF008-012, 48TJD008-014, 48TJE008-014 specifications

Carrier's 48TJD008-014, 48TJE008-014, and 48TJF008-012 series are high-performance packaged rooftop units engineered to meet the heating, ventilation, and air conditioning (HVAC) needs of commercial and industrial applications. These units are renowned for their reliability, energy efficiency, and advanced technologies, making them a popular choice among facility managers and HVAC professionals.

One of the standout features of these Carrier units is their robust construction. Designed to withstand diverse environmental conditions, these units come with durable cabinets that are resistant to corrosion and UV degradation. This durability extends the product lifespan and reduces maintenance needs, providing long-term savings for facility operators.

The series includes models ranging from 8 to 14 tons, catering to a variety of space requirements. Each unit is equipped with a high-efficiency scroll compressor that enhances performance while minimizing energy consumption. This compressor technology guarantees quieter operation, reduced vibrations, and exceptional reliability, which are critical factors in commercial settings.

Energy efficiency is a hallmark of the 48TJD, 48TJE, and 48TJF series. These units come with high Seasonal Energy Efficiency Ratios (SEER) and Energy Efficiency Ratios (EER), which result in lower energy bills and a reduced carbon footprint. The incorporation of advanced digital controls allows for precise temperature management and integration with building management systems, ensuring optimal performance throughout the year.

In terms of comfort features, the Carrier series utilizes variable-speed technology, enabling the fan to adjust its speed according to the load requirements. This results in more consistent temperature control and enhanced indoor air quality. The units also include options for enhanced filtration systems, which can accommodate various filter types, ensuring the removal of airborne particles and allergens.

Installation is simplified with these packaged rooftop units. Their compact design fits well on rooftops or in limited spaces, and they come with factory-installed components, which streamline the setup process. Additionally, the units feature easy access panels for maintenance, allowing technicians to conduct service with minimal disruption to operations.

Finally, Carrier's dedication to innovation is evident in the incorporation of smart technologies within these units. Integrated diagnostics and monitoring systems provide real-time performance data, enabling proactive maintenance and reducing the likelihood of unexpected breakdowns.

In summary, Carrier's 48TJD008-014, 48TJE008-014, and 48TJF008-012 rooftop units are engineered for efficiency, reliability, and comfort. With their durable construction, advanced compressor technology, energy efficiency, comfort features, and ease of installation, these units are ideal for meeting the demanding HVAC needs of commercial spaces.
Top Page Image Contents