Carrier 48HC installation instructions Space Sensors, Configure the Unit for Thermostat Mode

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Space Sensors —

The PremierLink controller is factory-shipped configured for Space Sensor Mode. A Carrier T-55 or T-56 space sensor must be used. T-55 space temperature sensor provides a signal of space temperature to the PremierLink control. T-56 provides same space temperature signal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants.

 

TB3

PL

SEN

1

J6-7

 

TB3

PL

SEN

3

J6-6

Jumper

SET

SET 5 J6-5

Fig. 44 - PremierLink T-56 Sensor

Connect Thermostat —

C10022

1

2

3

4

5

6

RED(+)

 

 

 

 

 

 

WHT(GND)

CCN COM

 

 

 

 

 

 

BLK(-)

 

 

 

 

 

 

 

 

 

 

SEN

 

 

 

 

 

SW1

 

 

 

 

 

 

 

 

 

 

 

BRN (GND)

SENSOR WIRING

 

 

 

 

 

BLU (SPT)

 

C08201

Fig. 41 - T-55 Space Temperature Sensor Wiring

Connect T-55:See Fig. 41 for typical T-55 internal connections. Connect the T-55 SEN terminals to TB3 terminals 1 and 3 (see Fig. 42).

 

TB3

PL

SEN

1

J6-7

SEN 3 J6-6

A7-wire thermostat connection requires a 24-v power source and a common connection. Use the R and C terminals on the CTB’s THERMOSTAT connection strip for these. Connect the thermostat’s Y1, Y2, W1, W2 and G terminals to PremierLink TB3 as shown in Fig. 45.

If the 48HC unit is equipped with factory-installed smoke detector(s), disconnect the factory BLU lead at TB3-6 (Y2) before connecting the thermostat. Identify the BLU lead originating at CTB-DDC-1; disconnect at TB3-6 and tape off. Confirm that the second BLU lead at TB3-6 remains connected to PremierLink J4-8.

SPACECTB

THERMOSTAT THERMOSTAT

R R

TB3PL

G 2 J4-12

Y1 4 J4-10

Y2 6 J4-8

W1 8 J4-6

48HC

Fig. 42 - PremierLink T-55 Sensor

C10023

W2 10 J4-4

C

C

CTB

Connect T-56:See Fig. 43 for T-56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-56 terminals to TB3 terminals 1, 3 and 5 (see Fig. 44).

THERMOSTAT

Fig. 45 - Space Thermostat Connections

C10283

1

2

3

4

5

6

RED(+)

 

 

 

 

 

 

WHT(GND)

CCN COM

 

 

 

 

 

 

BLK(-)

 

 

 

 

 

 

 

 

 

 

SEN

 

SET

 

 

 

SW1

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(T56)

 

 

 

 

 

 

BRN (GND)

SENSOR WIRING

 

 

 

 

 

BLU (SPT)

 

 

 

 

 

 

 

 

JUMPER

 

 

 

 

 

 

 

TERMINALS

 

 

 

 

 

 

 

AS SHOWN

If the 48HC unit has an economizer system and free-cooling operation is required, a sensor representing Return Air Temperature must also be connected (field-supplied and installed). This sensor may be a T-55 Space Sensor (see Fig.

41)installed in the space or in the return duct, or it may be sensor PNO 33ZCSENSAT, installed in the return duct. Connect this sensor to TB3-1 and TB3-3 per Fig. 42.

Configure the Unit for Thermostat Mode —

Connect to the CCN bus using a CCN service tool and navigate to PremierLink Configuration screen for Operating Mode. Default setting is Sensor Mode (value 1). Change the value to 0 to reconfigure the controller for Thermostat Mode.

Cool Warm

Fig. 43 - T-56 Internal Connections

C08202

When the PremierLink is configured for Thermostat Mode, these functions are not available: Fire Shutdown (FSD), Remote Occupied (RMTOCC), Compressor Safety (CMPSAFE), Supply Fan Status (SFS), and Filter Pressure Switch (FILTER).

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Contents Installation Instructions Safety Considerations Unit Dimensional Drawing 17 Size Unit C10897 Unit Dimensional Drawing 20 and 24 Size Units C10893 Unit Dimensional Drawing 28 Size Unit C10901 Plan for Unit Location Operating WeightsRoof Mount Inspect unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details 17 Size Unit Roof Curb Details 20 and 24 Size Units Roof Curb Details 28 Size Unit Rig and Place Unit Field Fabricate DuctworkHorizontal Duct Connection Install Outside Air Hood Factory OptionPositioning on Curb Gas Supply Line Install Flue Hood and Combustion Air HoodInstall Gas Piping To assemble the outside air hoodNatural Gas Supply Line Pressure Ranges Typical 3/4-in NPT Field Supplied Piping PartsOrifice Hole Factory-Option Thru-Base ConnectionsField Power Supply Install External Condensate Trap and LineMake Electrical Connections All Units Units with Factory-Installed DisconnectPowered Convenience Outlet Wiring Unit without Thru-Base Connection Kit Field Control WiringUnits without Thru-Base Connections ThermostatTypical Low-Voltage Control Connections Transformer Connection for 208-v Power SupplyTo connect the Thermidistat device 33CS2PPRH-01 Humidi-MiZerRControl ConnectionsHumidi-MiZer Space RH Controller To connect the Carrier humidistat HL38MG029OAT RRS Srtn PremierLink Controller PremierLinkt Factory-OptionPremierLink Wiring Schematic PremierLink Wiring Schematic with Humidi-MiZerR PremierLink Sensor Usage Supply Air Temperature SAT SensorField Connections EconoMi$er2Thermostat Mode Space Sensor ModeSpace Sensors Configure the Unit for Thermostat ModeIndoor Air Quality CO2 Sensor Economizer ControlsTo wire the sensor Space Relative Humidity Sensor InstallationSmoke Detector/Fire Shutdown FSD Filter Status SwitchSupply Fan Status Switch Power Exhaust outputCCN Communication Bus Connecting CCN Bus Color Code RecommendationsRecommended Cables RTU Open Multi-Protocol Control Board RTU Open Control SystemRTU Open System Control Wiring Diagram RTU Open System Control Wiring Diagram with Humidi-MiZerR Type of I/O Connection PIN Name Numbers Dedicated Inputs RTU Open Controller Inputs and OutputsRTU Open T-55 Sensor Connections Space Temperature SPT SensorsRelative Humidity Sensors Space or Duct Mounted Space Relative Humidity Sensor Typical WiringConnecting Discrete Inputs Duct Relative Humidity Sensor Typical WiringGeneral Communication Wiring ProtocolsRTU Open Troubleshooting Local AccessLEDs Outdoor Air Enthalpy ControlDifferential Enthalpy Control Return Air Sensor Tube Installation WiringSmoke Detectors Additional Application Data To install the return air sensor sampling tubeUnit Wire/Fuse or Hacr Breaker Sizing Data Smoke Detector Test MagnetUnit NOM IFM FAN Motor Exhaust Unbalanced 3-Phase Supply Voltage Pre-Start and Start-Up Adjust Factory-Installed OptionsInstall Accessories EconoMi$er IV Occupancy Switch48HC Catalog No 48HC---11SI

48HC specifications

The Carrier 48HC is a highly efficient rooftop HVAC unit designed for commercial applications that prioritize both performance and energy savings. This unit embodies Carrier's commitment to innovation by integrating advanced technologies and features that address the modern demands of building climate control.

One of the standout features of the Carrier 48HC is its exceptional energy efficiency. Employing the latest in variable-speed compressor technology, the unit adjusts its output based on the specific cooling needs of the space, which not only enhances comfort levels but also significantly reduces energy consumption. This feature is crucial for businesses looking to lower their operational costs while minimizing their environmental impact.

The Carrier 48HC is also equipped with a comprehensive range of control options. Through its intelligent control systems, users can utilize features such as demand ventilation, which optimizes indoor air quality while maintaining energy efficiency. The integration with building management systems (BMS) further enhances operational effectiveness, allowing real-time monitoring and adjustments from a centralized point.

Additionally, the 48HC is designed with durability in mind. Its robust construction resists harsh weather conditions and ensures long-lasting performance. The unit features advanced corrosion-resistant materials and coatings, which prolong its lifespan and reduce maintenance needs. This durability makes the 48HC a reliable choice for varying environments, whether it’s an industrial setting or a more delicate commercial space.

The unit’s compact design also deserves mention, as it facilitates easier installation on rooftops without taking up excessive space. The modular design allows for customization, enabling businesses to tailor their systems to fit specific heating and cooling requirements.

In terms of comfort, the Carrier 48HC employs efficient air distribution technology that ensures even airflow throughout the space. This greatly enhances occupant comfort by eliminating hot or cold spots, promoting a consistent indoor climate.

Finally, the 48HC complies with stringent environmental regulations and standards. With options for environmentally-friendly refrigerants, it supports businesses in their sustainability efforts while operating effectively under current regulations.

In summary, the Carrier 48HC stands out in the crowded HVAC market due to its advanced technology, energy efficiency, durability, and adaptability for commercial applications, making it a top choice for those looking to invest in a reliable and effective climate control solution.
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