Carrier 48TC**16 Power Wiring Connections Convenience Outlets, Electrical Operation Hazard

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Units Without Disconnect Option

TB1

11 12 13

Disconnect

per

NEC

L1 L2 L3

208/230-3-60

460-3-60

575-3-60

Units With Disconnect Option

L1

2

1

Optional

L24 Disconnect 3Factory

Wiring

Switch

Non-powered type: This type requires the field installation of a general-purpose 125-volt 15-A circuit powered from a source elsewhere in the building. Observe national and local codes when selecting wire size and conduit requirements, fuse or breaker requirements and disconnect switch size and location. Route 125-v power supply conductors into the bottom of the utility box containing the duplex receptacle.

Unit-powered type: A unit-mounted transformer is factory-installed to stepdown the main power supply voltage to the unit to 115-v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the panel beneath the control box. See Fig. 32.

The primary leads to the convenience outlet transformer are not factory-connected. Selection of primary power

48TC**16

L3

6

5

Disconnect factory test leads; discard.

Fig. 31 - Power Wiring Connections

Convenience Outlets —

!WARNING

ELECTRICAL OPERATION HAZARD

C10015

source is a customer-option. If local codes permit, the transformer primary leads can be connected at the line-side terminals on the unit-mounted non-fused disconnect; this will provide service power to the unit when the unit disconnect switch is open. Other connection methods will result in the convenience outlet circuit being de-energized when the unit disconnect switch is open. See Fig. 34. On a unit without a unit-mounted disconnect, connect the source leads to the main terminal block (TB1).

If the convenience outlet transformer is connected to the

Failure to follow this warning could result in personal injury or death.

Units with convenience outlet circuits may use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Lock-out and tag-out this switch, if necessary.

Two types of convenience outlets are offered on the 48TC**16 : non-powered and unit-powered. Both types provide a 125-volt GFCI (ground-fault circuit-interrupter) duplex receptacle rated at 15-A behind a hinged waterproof access cover, located on the panel beneath the control box. See Fig. 32.

line side of a field disconnect, the conduit provided with the unit must be used to protect the wire as they are routed from the transformer to the field disconnect. The end of the conduit with the straight connector attaches to the field disconnect. The other end does not need to connect to the transformer; however, the conduit must be routed so that all wiring is either in the conduit or behind the access panel.

If the convenience outlet transformer is connected to the line side of the factory disconnect option, route the wires through the web bushing located on the bottom of the disconnect box. For the load side wiring to the factory option disconnect, route the wires through the hole on the right side of the disconnect. Be sure to create a drip loop at least 6” long.

Pwd-CO

Fuse

Switch

Convenience

Outlet

GFCI

Disconnect

Access Panel

Pwd-CO

Transformer

NOTICE/AVIS

Convenience Outlet Utilization

Maximum Intermittent Use 15 - Amps

Maximum Continuous Use 8 - Amps

Observe a 50% limit on the circuit

Loading above 8 - Amps

Utilisation de la prise utilitaire

Usage intermittent maximum 15 - Amps

Usage continu maximum 8 - Amps

Observez une limite de 50% sur le circuit Chargement au-dessus de 8 - Amps 50HE501288 2.0

C10077

Fig. 33 - Convenience Outlet Utilization Notice

Fig. 32 - Convenience Outlet Location

C10361

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Contents Installation Instructions Unit Operation and Safety Hazard FIRE, Explosion HazardElectrical Shock Hazard Personal Injury and Environmental HazardUnit Dimensional Drawing 16 Size Unit Service Clearance Dimensional Drawing Plan for Unit LocationInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork Rig and Place UnitProperty Damage Hazard Unit Damage HazardConvert to Horizontal and Connect Ductwork when required Positioning on CurbEconomizer Hood Removal and Setup Factory Option Install Outside Air HoodTwo Position Damper Hood Removal and Setup Factory Option Install Flue Hood Economizer Hood and Two-Position HoodNatural Gas Supply Line Pressure Ranges Install Gas PipingEquipment Damage Hazard Completing Installation of Thru-the-Base Option Install External Condensate Trap and Line Fire or Explosion HazardField Power Supply Make Electrical ConnectionsUnits Without Factory-Installed Disconnect Units with Factory-Installed DisconnectPower Wiring Connections Convenience Outlets Electrical Operation HazardUnit Powered Convenience Outlet Wiring Field Control Wiring Factory-Option Thru-Base Connections Electrical ConnectionsUnits without Thru-Base Connections ThermostatUnit without Thru-Base Connection Kit Typical Low-Voltage Control ConnectionsHumidi-MiZerRControl Connections Humidi-MiZer Space RH ControllerTo connect the Carrier humidistat HL38MG029 To connect the Thermidistat device 33CS2PPRH-01OAT RRS Srtn PremierLinkt Factory Option PremierLink ControllerPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR Supply Air Temperature SAT Sensor Field ConnectionsEconoMi$er2 PremierLink Sensor UsageSpace Sensor Mode Thermostat ModeConfigure the unit for Thermostat Mode Space SensorsEconomizer Controls Indoor Air Quality CO2 sensorTo wire the sensor Unit Performance HazardFilter Status Switch Supply Fan Status SwitchPower Exhaust output Smoke Detector/Fire Shutdown FSDCCN Communication Bus Connecting CCN Bus Color Code RecommendationsRecommended Cables RTU Open Control System RTU Open Multi-Protocol Control BoardRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR RTU Open Controller Inputs and Outputs Type of I/O Connection PIN Name Numbers Dedicated InputsSpace Temperature SPT Sensors RTU Open T-55 Sensor ConnectionsSpace Relative Humidity Sensor Typical Wiring Relative Humidity Sensors Space or Duct MountedDuct Relative Humidity Sensor Typical Wiring Connecting Discrete InputsCommunication Wiring Protocols GeneralLocal Access RTU Open TroubleshootingOutdoor Air Enthalpy Control PNO 33CSENTHSW LEDsDifferential Enthalpy Control Return Air Enthalpy SensorSmoke Detectors SystemController Sensor ModuleSee Completing Installation of Return Air Smoke Smoke Detector LocationsSupply Air Return Air with EconomizerCompleting Installation of Return Air Smoke Sensor Return Air Detector Shipping PositionUnit Wire/Fuse or Hacr Breaker Sizing Data BrkrAdjust Factory-Installed Options Install AccessoriesEconoMi$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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