48TC**16

Single Package Rooftop

Gas Heating/Electric Cooling Unit with Puronr (R---410A) Refrigerant Size 16

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 4 Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 2 - Plan for Sequence of Unit Installation . . . . . . 5 Curb-Mount Installation . . . . . . . . . . . . . . . . . . . . . 5 Pad-Mount Installation . . . . . . . . . . . . . . . . . . . . . . 5 Frame-Mount Installation . . . . . . . . . . . . . . . . . . . . 5 Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 5 Roof Curb Mount . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Slab Mount (Horizontal Units Only) . . . . . . . . . . . 5

Alternate Unit Support

(In Lieu of Curb or Slab Mount) . . . . . . . . . . . . . . 5 Step 5 - Field Fabricate Ductwork . . . . . . . . . . . . . . . . 7 Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 7 Positioning on Curb . . . . . . . . . . . . . . . . . . . . . . . . 8 Step 7 - Convert to Horizontal and Connect Ductwork . . . 8 Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . . 9

Economizer Hood Removal and Setup —

Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Two Position Damper Hood Removal and Setup — Factory Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Economizer Hood and Two-Position Hood . . . . . 10 Step 9 - Install Flue Hood . . . . . . . . . . . . . . . . . . . . . 10 Step 10 - Install Gas Piping . . . . . . . . . . . . . . . . . . . . 11

Factory-Option Thru-Base Connections

(Gas Connections) . . . . . . . . . . . . . . . . . . . . . . . . . 11 Step 11 - Install External Condensate Trap and Line . . 13 Step 12 - Make Electrical Connections . . . . . . . . . . . 14 Field Power Supply . . . . . . . . . . . . . . . . . . . . . . . . 14 All Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Units without Factory-Installed Disconnect . . . . 15

Units with Factory-Installed Disconnect . . . . . . . 15 Convenience Outlets . . . . . . . . . . . . . . . . . . . . . . . 16

Factory-Option Thru-Base Connections

(Electrical Connections) . . . . . . . . . . . . . . . . . . . . 18 Units without Thru-Base Connections . . . . . . . . . 18 Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . . 18 Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Unit without Thru-Base Connection Kit . . . . . . . 19 Heat Anticipator Settings . . . . . . . . . . . . . . . . . . . 19

Humidi-MiZerRControl Connections . . . . . . . . . . 20 Humidi-MiZer - Space RH Controller . . . . . . . . 20 PremierLinkt (Factory Option) . . . . . . . . . . . . . . . . . 21 Supply Air Temperature (SAT) Sensor . . . . . . . . . 25 Outdoor Air Temperature (OAT) Sensor . . . . . . . 25 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Space Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . . 27 Configure the Unit for Thermostat Mode . . . . . . 27 Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . 28 Indoor Air Quality (CO2 sensor) . . . . . . . . . . . . . 28 Outdoor Air Quality Sensor . . . . . . . . . . . . . . . . . 28

Space Relative Humidity Sensor or

Humidistat Connections . . . . . . . . . . . . . . . . . . . . 29 Smoke Detector/Fire Shutdown (FSD) . . . . . . . . . 30 Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . . 30 Supply Fan Status Switch . . . . . . . . . . . . . . . . . . . 30 Remote Occupied Switch . . . . . . . . . . . . . . . . . . . 30 Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . . 30 CCN Communication Bus . . . . . . . . . . . . . . . . . . 31

RTU Open Control System . . . . . . . . . . . . . . . . . . . . . 32 Supply Air Temperature (SAT) Sensor . . . . . . . . . 35 Outdoor Air Temperature (OAT) Sensor . . . . . . . 35 EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Space Temperature (SPT) Sensors . . . . . . . . . . . . 36 Indoor Air Quality (CO2) Sensor . . . . . . . . . . . . . 36

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Carrier 48TC**16 installation instructions Installation Instructions
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48TC**16 specifications

The Carrier 48TC**16 is a high-efficiency rooftop packaged unit, designed for commercial heating and cooling applications. This model exemplifies Carrier's commitment to delivering reliable and innovative solutions to the HVAC industry. With cutting-edge technology and robust performance characteristics, the 48TC**16 is ideally suited for a variety of building types.

One of the main features of the Carrier 48TC**16 is its impressive energy efficiency. The unit achieves high SEER (Seasonal Energy Efficiency Ratio) ratings, which translates to lower energy bills and reduced environmental impact. The unit is equipped with a scroll compressor, known for its quiet operation and reliability, ensuring a comfortable indoor environment without disruptive noise.

The 48TC**16 utilizes advanced microprocessor controls that enhance system performance by enabling precise temperature control and various operational modes. This allows users to optimize the system's performance based on specific heating and cooling needs. Additionally, the unit includes enhanced diagnostics, allowing for faster troubleshooting and easier maintenance, thus minimizing downtime and repair costs.

Another notable characteristic of the 48TC**16 is its robust construction. Built to withstand harsh weather conditions, the unit features a galvanized steel cabinet coated with a corrosion-resistant finish, ensuring longevity and durability. It also comes equipped with a variety of factory-installed options, such as economizers and filtration systems, which can further enhance its performance and flexibility.

The Carrier 48TC**16 is designed with sustainability in mind, using environmentally friendly refrigerants. The unit supports the latest refrigerant regulations, helping to reduce the overall carbon footprint of the building it serves.

Installation and service are simplified by the unit's modular design, which allows for easy access to all major components. This design not only streamlines maintenance procedures but also facilitates quick installation, making it an ideal choice for contractors and facility managers alike.

In summary, the Carrier 48TC**16 rooftop packaged unit combines high energy efficiency, advanced controls, robust construction, and eco-friendly features, making it a top choice for commercial heating and cooling needs. Its user-friendly design and reliability ensure optimal performance and comfort for various applications, underscoring Carrier's reputation as a leader in the HVAC industry. Whether for new construction or retrofitting, the 48TC**16 meets the demands of modern buildings while adhering to sustainability practices.
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