Carrier 48TJD008-014 installation instructions Installation, Start-Up Service Instructions

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48TJD008-014 48TJE008-014 48TJF008-012

Single-Package Rooftop Heating/Cooling Units

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

Step 1 Ð Provide Unit Support . . . . . . . . . . . . . . . 1

·ROOF CURB

·SLAB MOUNT

Step 2 Ð Field Fabricate Ductwork . . . . . . . . . . . . 2

Step 3 Ð Install External Trap for Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 4 Ð Rig and Place Unit . . . . . . . . . . . . . . . . . . 2

· POSITIONING

Step 5 Ð Install Flue Hood . . . . . . . . . . . . . . . . . . . 8 Step 6 Ð Install Gas Piping . . . . . . . . . . . . . . . . . . . 8 Step 7 Ð Make Electrical Connections . . . . . . . . 8

·FIELD POWER SUPPLY

·FIELD CONTROL WIRING

·HEAT ANTICIPATOR SETTINGS

Step 8 Ð Adjust Factory-Installed Options . . . 11

·APOLLO CONTROL

·MANUAL OUTDOOR-AIR DAMPER

·OPTIONAL DURABLADE ECONOMIZER

·OPTIONAL PARABLADE ECONOMIZER

Step 9 Ð Adjust Evaporator-Fan Speed . . . . . . 16

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23,24 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-30 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 31-36 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical com- ponents. Only trained and quali®ed service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func- tions of cleaning coils and ®lters and replacing ®lters. All other operations should be performed by trained service per- sonnel. When working on air-conditioning equipment, ob- serve precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ®re ex- tinguishers available for all brazing operations.

Disconnect gas piping from unit when leak testing at pressure greater than 1¤2 psig. Pres- sures greater than 1¤2 psig will cause gas valve damage resulting in hazardous con- dition. If gas valve is subjected to pres- sure greater than 1¤2 psig, it must be replaced before use. When pressure testing ®eld- supplied gas piping at pressures of 1¤2 psig or less, a unit connected to such piping must be isolated by manually closing the gas valve(s).

Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.

INSTALLATION

Unit is shipped in the vertical discharge con®guration. To convert to horizontal con®guration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation- side down. Seals around duct openings must be tight. See Fig. 1.

Step 1 Ð Provide Unit Support

ROOF CURB Ð Assemble and install accessory roof curb in accordance with instructions shipped with curb. See Fig. 2. Install insulation, cant strips, roo®ng felt, and counter ¯ashing as shown. Ductwork must be attached to curb. If gas is to be routed through the curb, attach the accessory thru-the-curb service connection plate to the roof curb in ac- cordance with the accessory installation instructions. Con- nection plate must be installed before unit is set in roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket sup- plied with the roof curb as shown in Fig. 2. Improp- erly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. Unit leveling tolerances are shown in Fig. 3. This is necessary for unit drain to function prop- erly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book

1

4

 

PC 111

Catalog No. 564-934

Printed in U.S.A.

Form 48TJ-13SI

Pg 1

9-96

Replaces: 48TJ-10SI

Tab

1a

6a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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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 Economizer Static Pressure Drop in. wg Evaporator-Fan Motor EfficiencyMotor Data Fan Performance, 48TJ009 Ð Vertical Discharge Units Fan Performance, 48TJ008 Ð Vertical Discharge UnitsAirflow 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-UPNominal Input Altitude CompensationElevation Lubrication Cleaning Condenser Coil48TJ Unit Voltage Condenser-Fan Adjustment FigFAN Height ``A Cooling Charging Chart 48TJ009 LED Indication Error Code Description LED Error Code DescriptionOFF Flash²Burner Section Details Spark Gap Adjustment Problem Cause Remedy LED Error Code Service AnalysisLED OFF 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.
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