48TC**16

Smoke Detector/Fire Shutdown (FSD) —

This function is available only when PremierLink is configured for (Space) Sensor Mode. The unit is factory-wired for PremierLink FSD operation when PremierLink is factory-installed.

On 48TC**16 units equipped with factory-installed Smoke Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The PremierLink communicates the smoke detector’s tripped status to the CCN building control. See Fig. 46, the PremierLink wiring schematic.

Filter Status Switch —

This function is available only when PremierLink is configured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in two ways: By monitoring a field-supplied/installed filter pressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switch according to switch manufacturer’s instructions, to measure pressure drop across the unit’s return filters. Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT-R terminal. Connect the other side of the NO contact set to TB3-10. Setpoint for Dirty Filter is set at the switch. See Fig. 60.

Filter Switch (NO, close on rising pressure (high drop))

CTB

Thermostat

R

TB3PL

10 J4-4

C10286

Fig. 60 - PremierLink Filter Switch Connection

When the filter switch’s NO contact set closes as filter pressure drop increases (indicating dirt-laden filters), the input signal to PremierLink causes the filter status point to read “DIRTY”.

Using Filter Timer Hours: Refer to Form 33CS-67SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence.

Supply Fan Status Switch —

The PremierLink control can monitor supply fan operation through a field-supplied/installed differential pressure switch. This sequence will prevent (or interrupt) operation of unit cooling, heating and economizer functions until the pressure switch contacts are closed indicating proper supply fan operation.

Install the differential pressure switch in the supply fan section according to switch manufacturer’s instructions. Arrange the switch contact to be open on no flow and to close as pressure rises indicating fan operation.

Connect one side of the switch’s NO contact set to CTB’s THERMOSTAT-R terminal. Connect the other side of the NO contact set to TB3-8. Setpoint for Supply Fan Status is set at the switch. See Fig. 61.

Fan (Pressure) Switch (NO, close on rise in pressure)

CTB

Thermostat

R

TB3PL

8 J4-6

C10287

Fig. 61 - PremierLink Wiring Fan Pressure Switch

Connection

Remote Occupied Switch —

The PremierLink control permits a remote timeclock to override the control’s on-board occupancy schedule and place the unit into Occupied mode. This function may also provide a “Door Switch” time delay function that will terminate cooling and heating functions after a 2-20 minute delay.

Connect one side of the NO contact set on the timeclock to CTB’s THERMOSTAT-R terminal. Connect the other side of the timeclock contact to the unit’s TB3-2 terminal. See Fig. 62.

Remote Occupied

LCTB

 

Thermostat

 

 

 

 

R

 

Time Clock

TB3

PL

 

 

2

J4-12

C10288

Fig. 62 - PremierLink Wiring Remote Occupied

Refer to Form 33CS-67SI for additional information on configuring the PremierLink control for Door Switch timer function.

Power Exhaust (output) —

Connect the accessory Power Exhaust contactor coils(s) per Fig. 63.

Power Exhaust

 

TB3

PL

 

PEC

 

GRA

 

 

15

J8-3

 

 

 

 

 

CTB

 

 

 

 

 

THERMOSTAT

 

 

 

 

TAN

C

 

 

 

 

 

C10289

Fig. 63 - PremierLink Power Exhaust Output

Connection

30

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Carrier 48TC**16 Smoke Detector/Fire Shutdown FSD, Filter Status Switch, Supply Fan Status Switch, Power Exhaust output
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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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