Carrier 50TCA04-A07 appendix Completing Heater Installation, Typical Single Point Installation

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50TC

Single Point Boxes and Supplementary Fuses — When the unit MOCP device value exceeds 60-A,unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory Single Point Boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the outdoor section. The Single Point Box has a hinged access cover. See Fig 30.

CONTROL

BOX

BUSHING

SINGLE

 

POINT BOX

 

MOUNTING

 

SCREWS

 

DRIP BOOT

 

BRACKET

 

MOUNTING

 

SCREWS

 

POWER

 

WIRES

 

FOAM

 

BUSHING

 

 

22.2

23

1

3

HEATER

RELAYS

HEATER

MOUNTING

SCREWS

C08136

Fig. 30 - Typical Single Point Installation

On 50TC units, all fuses are 60-A. Single point boxes containing fuses for 208/230-V applications use UL Class RK5 250-V fuses (Bussman FRNR 60 or Shawmut TR 60R). Single point boxes for 460-V and 575-V applications use UL Class T 600-V fuses (Bussman JJS 60 or Shawmut A6T 60). (Note that all heaters are qualified for use with a 60-A fuse, regardless of actual heater ampacity, so only 60-A fuses are necessary.)

Unit heater applications not requiring supplemental fuses do not require a Single Point Box. Connect power supply conductors to heater conductors and field-supplied base unit power tap leads (see text below re: “Completing Heater Installation”) below the unit’s main control box using UL-approved connectors.

Safety Devices — Electric heater applications use a combination of line-break/auto-reset limit switches and a pilot-circuit/manual reset limit switch to protect the unit against over-temperature situations.

Line-break/auto-reset limit switches are mounted on the base plate of each heater module. See Fig. 31. These are accessed through the indoor access panel. Remove the switch by removing two screws into the base plate and extracting the existing switch.

Pilot-circuit/manual reset limit switch is located in the side plate of the indoor (supply) fan housing. See Fig. 28.

Completing Heater Installation

Field Power Connections — Field-supplied tap conductors must be installed between the base unit’s field power connection lugs and the splice connection between field power supply conductors and the conductors to the electric heater(s). Refer to unit wiring schematic. Use

copper wire only. Size these conductors based on the MCA (Minimum Circuit Ampacity) value marked on the 50TC unit’s info plate for the base unit less electric heater load. Use UL-approved pressure connectors (field-supplied) for these splice joints.

Line-Break

Limit Switches

 

23

 

21

 

13

 

11

ALLIED PA

 

 

MODEL

OD

 

NO.

 

ERIAL NO.

 

 

 

ISTED AIR

 

1

 

NDITIONING

23

 

UIP ACCESS

3

 

346N.

2-

 

P / N

5610-4

REV

 

C08330

Fig. 31 - Typical Location of Heater Limit Switches

(3-phase heater shown)

Low-Voltage Control Connections — Pull the low-voltage control leads from the heater module(s) - VIO and BRN (two of each if two modules are installed; identify for Module #1) - to the 4-pole terminal board TB4 located on the heater bulkhead to the left of Heater #1. Connect the VIO lead from Heater #1 to terminal TB4-1. Connect the VIO lead from Heater #2 to terminal TB4-2. Connect both BRN leads to terminal TB4-3. See Fig. 32.

LCTB

CONTL

BOARD

2VIO

3ORN

12 BRN

 

ORN

VIO

BRN

TB4

1

2

3

Field

VIO

VIO

BRN BRN

 

 

 

Connections

 

 

 

Elec Htr

VIO HR2 BRN

VIO HR1

BRN

HR1: On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C08331

Fig. 32 - Accessory Electric Heater Control

Connections

22

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Contents Table of Contents Safety ConsiderationsSeasonal Maintenance Unit Arrangement and AccessRoutine Maintenance GeneralSupply FAN Blower Section Supply Fan Belt-DriveAdjustable-Pitch Pulley on Motor Supply-Fan Pulley Adjustment BearingsCooling Condenser Coil Maintenance and Cleaning RecommendationCondenser Coil Cleaning Condenser Coil Two-Row CoilsEvaporator Coil Refrigerant System Pressure Access PortsPuronr R-410A Refrigerant Refrigerant ChargeTo Use Cooling Charging Charts CoreMax Access Port AssemblyCooling Charging Charts Cooling Charging ChartsCooling Charging Charts Filter Drier Troubleshooting Cooling SystemCompressor Condenser-Fan LocationCooling Service Analysis Problem Cause RemedyConvenience Outlets Smoke DetectorsController SystemSensor Completing Installation of Return Air Smoke Sensor Smoke Detector LocationsFiop Smoke Detector Wiring and Response Return Air Sensor Operating PositionDirty Controller Test Sensor and Controller Tests Sensor Alarm TestController Alarm Test Dirty Sensor TestCleaning the Smoke Detector Detector CleaningRemote Test/Reset Station Dirty Sensor Test Changing the Dirt Sensor TestDetector Indicators IndicatorsAlarm State Control or Indicator DescriptionTroubleshooting Protective DevicesControl Circuit Electric HeatersRelief Device Condenser Fan Motor ProtectionCompleting Heater Installation Typical Single Point InstallationPremierlinkt Control PremierLink ControllerPremierLink Wiring Schematic 55 Space Temperature Sensor Wiring Temp ResistancePremierLink Sensor Usage Temperature Enthalpy SensorOutdoor AIR Return AIR Field Connection Input Signal Space Sensor ModeThermostat Mode TB1 Terminal Field Connection Input SignalLctb Outside and Return Air Enthalpy Sensor Wiring Indoor CO2 Sensor 33ZCSENCO2 Connec TionsColor Code Recommendations CCN BUS Wire CCN Plug PIN Color NumberRecommended Cables ManufacturerEconomizer Systems PremierLink CCN Bus ConnectionsInputs Outputs RUNOutdoor Air Lockout Sensor Supply Air Temperature SAT SensorEconoMi$er EconoMi$er IV Control ModesDifferential Dry Bulb Control Outdoor Enthalpy ChangeoverEnthalpy Changeover Setpoints Indoor Air Quality IAQ Sensor InputDamper Movement Exhaust Setpoint AdjustmentMinimum Position Control ThermostatsDemand Control Ventilation DCV CO2 Sensor ConfigurationEconoMi$er IV Sensor Usage Differential Enthalpy DCV Demand Controlled Ventilation and Power ExhaustEconoMi$er IV Preparation Single EnthalpyEconoMi$er IV Troubleshooting Completion Wiring DiagramsPRE-START-UP START-UP, General START-UP, Premierlink ControlsInitial Operation and Test Memory ResetPerform System Check-Out Operating Sequence, Base Unit ControlsOperating Sequence, PremierLink Control 50TC Available Cooling Stages Number Stages EconomizerOAT ≤ SPT 50TC 50TC Fastener Torque Values Loadshed Command Gas and Electric Heat UnitsLinkage Modes 50TC Typical Unit Wiring diagram Power A06 Torque Values50TC Unit Wiring Diagram Control A06 Serial Number Format Appendix I. Model Number SignificanceModel Number Nomenclature Position Number Typical DesignatesAppendix II. Physical Data Physical Data Cooling TonsAppendix III. FAN Performance General Fan Performance NotesTon Vertical Supply Ton Horizontal SupplyCFM RPM BHP Standard Static Option 5541215 11701165 1225 120650TC**05 Phase Ton Horizontal Supply 724 765Phase Ton Horizontal Supply 923 1019 822 927 1018872 973 1061 974 1067Pulley Adjustment Unit MOTOR/DRIVE Motor Pulley Turns Open ComboAppendix IV. Electrical Data Appendix IV. Electrical Data FLAMCA/MOCP Determination no C.O. or Unpwrd C.O MCA/MOCP Determination no C.O. or Unpwrd C.O. 78/89152 159 Appendix V. Wiring Diagram List Wiring DiagramsAppendix VI. Motormaster Sensor Locations 50TC*A04 Outdoor CircuitingAppendix VI. cont Motormaster Sensor Locations Catalog No 50TC---1SM Pressures Cooling Mode START-UP ChecklistRemove and Store in Job File

50TCA04-A07 specifications

The Carrier 50TCA04-A07 is a prominent model from Carrier, a leader in the heating, ventilation, and air conditioning (HVAC) industry. Designed for commercial applications, this unit exemplifies advanced technology and reliability, catering to a wide array of cooling needs.

One of the most notable features of the Carrier 50TCA04-A07 is its high efficiency. With a cooling capacity that suits various settings, it is engineered to provide excellent performance with minimal energy consumption. The unit achieves impressive Seasonal Energy Efficiency Ratio (SEER) ratings, which not only reduce operational costs but also lower the environmental impact.

The Carrier 50TCA04-A07 employs state-of-the-art inverter technology. This innovation allows the compressor to operate at varying speeds, adjusting its output according to the cooling demand. Consequently, the system can maintain optimal comfort levels while using less energy. Additionally, the inverter technology contributes to quieter operation, making it a suitable choice for environments where noise is a concern.

Durability is a hallmark of the Carrier 50TCA04-A07. Constructed with robust materials, this model is designed to withstand harsh conditions and ensure long-term reliability. The unit is equipped with corrosion-resistant components, extending its lifespan and maintaining performance quality over time.

Another significant characteristic of the Carrier 50TCA04-A07 is its advanced control system. The integrated control panel provides easy access to performance settings and monitoring capabilities. Users can effortlessly adjust temperatures and modes, ensuring a customizable climate. Furthermore, compatibility with smart building management systems enhances operational efficiency and real-time monitoring.

Regarding safety features, the Carrier 50TCA04-A07 is equipped with multiple sensors and automated responses to prevent overheating and ensure safe operation. These safety mechanisms not only protect the unit but also contribute to the overall safety of the installation environment.

In summary, the Carrier 50TCA04-A07 is a highly efficient, durable, and technologically advanced HVAC solution for commercial spaces. Its innovative features, including inverter technology, robust construction, and smart control systems, set it apart in the market, making it a reliable choice for businesses seeking to optimize their climate control needs while minimizing energy consumption and operational costs.
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