Carrier 48TC**16 Plan for Sequence of Unit Installation, Inspect Unit, Provide Unit Support

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Roof Mount —

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Table 1 – Operating Weights

48TC**16

COMPONENT

UNITS LB (KG)

 

 

 

Base Unit

1380

(627)

 

 

 

 

Economizer

 

 

 

Vertical

100

(45)

Horizontal

115

(52)

 

 

 

Humidi--- MiZerR System

62

(28)

Powered Outlet

32

(15)

 

 

 

 

Curb

 

 

 

14--- in/356 mm

180

(82)

24--- in/610 mm

235

(107)

 

 

 

 

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb-mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for installation steps.

Curb-mounted installation —

Install curb, making sure to position the common cross rail (see Fig. 3) for large duct opening.

Install field-fabricated ductwork inside curb

Complete installation of the factory-installed thru-the-base service connection option

Prepare bottom condensate drain connection to suit planned condensate line routing (refer to Step 9 for details)

Rig and place unit Install outdoor air hood

Install condensate line trap and piping Make electrical connections

Install other accessories

Pad-mounted installation —

Prepare pad and unit supports

Check and tighten the bottom condensate drain connection plug

Rig and place unit

Convert unit to side duct connection arrangement Install field-fabricated ductwork at unit duct openings Install outdoor air hood

Install condensate line trap and piping Make electrical connections

Install other accessories

Frame-mounted installation —

Frame-mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Step 3 — Inspect Unit

Inspect unit for transportation damage. File any claim with transportation agency.

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in Fig. 3. Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 3. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in Fig. 4. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit.

IMPORTANT:

If the unit’s gas connection and/or electric and control wiring is to be routed through the basepan and the unit is equipped with the factory-installed Thru-the-Base service option see the following sections:

SFactory-Option Thru-Base Connections (Gas Connection) on page 11

SFactory-Option Thru-Base Connections (Electrical Connections) on page 17

If using the field-installed Thru-the-Base accessory follow the instructions provided with the accessory kit.

NOTE: If gas and/or electrical connections are not going to occur at this time, tape or otherwise cover the fittings so that moisture does not get into the building or conduit in the interim.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of

6in. (150 mm) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Alternate Unit Support

(In Lieu of Curb or Slab Mount) —

A non-combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 4-in. x 4-in. (102 mm x 102 mm) pads on each side.

48TC**16

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Contents Installation Instructions FIRE, Explosion Hazard Unit Operation and Safety HazardElectrical Shock Hazard Personal Injury and Environmental HazardUnit Dimensional Drawing 16 Size Unit Plan for Unit Location Service Clearance Dimensional DrawingProvide Unit Support Plan for Sequence of Unit InstallationInspect Unit Roof Curb Details Rig and Place Unit Field Fabricate DuctworkProperty Damage Hazard Unit Damage HazardPositioning on Curb Convert to Horizontal and Connect Ductwork when requiredTwo Position Damper Hood Removal and Setup Factory Option Install Outside Air HoodEconomizer Hood Removal and Setup Factory Option Economizer Hood and Two-Position Hood Install Flue HoodEquipment Damage Hazard Install Gas PipingNatural Gas Supply Line Pressure Ranges Completing Installation of Thru-the-Base Option Fire or Explosion Hazard Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyUnits with Factory-Installed Disconnect Units Without Factory-Installed DisconnectElectrical Operation Hazard Power Wiring Connections Convenience OutletsUnit Powered Convenience Outlet Wiring Factory-Option Thru-Base Connections Electrical Connections Field Control WiringUnits without Thru-Base Connections ThermostatTypical Low-Voltage Control Connections Unit without Thru-Base Connection KitHumidi-MiZer Space RH Controller Humidi-MiZerRControl ConnectionsTo connect the Carrier humidistat HL38MG029 To connect the Thermidistat device 33CS2PPRH-01OAT RRS Srtn PremierLink Controller PremierLinkt Factory OptionPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR Field Connections Supply Air Temperature SAT SensorEconoMi$er2 PremierLink Sensor UsageThermostat Mode Space Sensor ModeSpace Sensors Configure the unit for Thermostat ModeIndoor Air Quality CO2 sensor Economizer ControlsUnit Performance Hazard To wire the sensorSupply Fan Status Switch Filter Status SwitchPower Exhaust output Smoke Detector/Fire Shutdown FSDRecommended Cables Connecting CCN Bus Color Code RecommendationsCCN Communication Bus RTU Open Multi-Protocol Control Board RTU Open Control SystemRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR Type of I/O Connection PIN Name Numbers Dedicated Inputs RTU Open Controller Inputs and OutputsRTU Open T-55 Sensor Connections Space Temperature SPT SensorsRelative Humidity Sensors Space or Duct Mounted Space Relative Humidity Sensor Typical WiringConnecting Discrete Inputs Duct Relative Humidity Sensor Typical WiringGeneral Communication Wiring ProtocolsRTU Open Troubleshooting Local AccessLEDs Outdoor Air Enthalpy Control PNO 33CSENTHSWDifferential Enthalpy Control Return Air Enthalpy SensorSystem Smoke DetectorsController Sensor ModuleSmoke Detector Locations See Completing Installation of Return Air SmokeSupply Air Return Air with EconomizerReturn Air Detector Shipping Position Completing Installation of Return Air Smoke SensorBrkr Unit Wire/Fuse or Hacr Breaker Sizing DataInstall Accessories Adjust Factory-Installed OptionsEconoMi$er IV Occupancy Switch Pre-Start and Start-Up48TC**16 14SI

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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