Carrier Understanding Schematics and Wiring for Heat Pump Models

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LEGEND

FIELD SPLICE TERMINAL (MARKED) TERMINAL (UNMARKED)

SPLICE

SPLICE (MARKED)

FACTORY WIRING FIELD CONTROL WIRING FIELD POWER WIRING

ACCESSORY OR OPTIONAL WIRING

TO INDICATE COMMON POTENTIAL ONLY:

NOT TO REPRESENT WIRING

AHA

ADJUSTABLE HEAT ANTICIPATOR

CCONTACTOR

CAP CAPACITOR

CB

CIRCUIT BREAKER

COMP

COMPRESSOR MOTOR

CTD

COMPRESSOR TIME DELAY

DB

DEFROST BOARD

DFT

DEFROST THERMOSTAT

DR

DEFROST RELAY

EQUIP

EQUIPMENT

FU

FUSE

GND

GROUND

HR

HEATER RELAY

HTR

HEATER

IFM

INDOOR FAN MOTOR

LPS

LOW PRESSURE SWITCH

OFM

OUTDOOR FAN MOTOR

QT

QUADRUPLE TERMINAL

RVS

REVERSING VALVE SOLENOID

S.B.

SLOW BLOW FUSE

TC

THERMOSTAT - COOLING

TDR

TIME DELAY RELAY

TH

THERMOSTAT - HEATING

TRAN

TRANSFORMER

NOTES:

1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED, IT MUST BE REPLACED WITH TYPE 90 DEGREE C WIRE OR IT’S EQUIVALENT.

2. SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES.

3. USE 75 DEGREE COPPER CONDUCTORS FOR FIELD INSTALLATION.

4.FOR HIGH SPEED IFM, DISCONNECT RED

WIRE FROM TDR 3 AND CONNECT BLK WIRE FROM IFM. FOR MEDIUM SPEED, DISCONNECT RED WIRE

FROM TDR 3 AND CONNECT BLU WIRE FROM IFM.

5.DEFROST TIMER TO BE SET AT 90 MINUTES EXCEPT FOR 50JS048, 060 MODELS

SET AT 50 MINUTES.

A00073

Fig. 12ÐWiring Schematics

9

Image 9
Contents Maintenance Receiving and InstallationTroubleshooting Safety ConsiderationsElectrical Characteristics Unit Weight Unit Height Center of Gravity50JS060 IN. MM 50JS04850JX042 50JX048ÐGeneral Receiving and InstallationÐCheck Equipment Unit Size ODS Catalog NumberÐProvide Unit Support InstallationÐProvide Clearances ÐRig and Place UnitÐSelect and Install Ductwork Unit Maximum WeightÐProvide for Condensate Disposal BÐPhysical Data AÐPhysical DataC99061 ÐInstall Electrical ConnectionsC99030 C99013A00073 ÐWiring SchematicsA00074 A00075 TDR Time Delay Relay Thermostat Heating Tran TransformerAÐElectrical DataÐ50JS RLA LRA FLAMocp → BÐElectrical DataÐ50JX Locked Rotor Amps Full Load AmpsMinimum Circuit Amps Mocp Maximum Overcurrent Protection Rated Load AmpsÐStart-Up Adjustments Special Procedures for 208-V OperationPRE-START-UP START-UPÐTypical Heat Pump Operation, Heating Mode Checking and Adjusting Refrigerant Charge AÐWet Coil Air Delivery Unit 50JS 018-060 Deduct 10% forUnit Motor Speed External Static Pressure IN. WG BÐWet Coil Air Delivery Unit 50JX 024-060 Deduct 10% for Speed Indoor Airflow and Airflow AdjustmentsC00030 MaintenanceC00032 C00031C99033 C99031C99035 C99032AIR Filter Indoor Blower and MotorOutdoor FAN System Information C99097C99029 Symptom Cause Remedy ÐCooling and Heating Troubleshooting ChartSTART-UP Checklist Remove and Store in JOB File Cooling and Heating Troubleshooting Chart contdPage Page Book Tab 5a 5a Catalog No Form 50JS,JX-1SI Replaces 50JX-2SI

50JS specifications

The Carrier 50JS is a high-performance rooftop unit designed for commercial applications, combining advanced technology with energy efficiency to deliver optimal heating and cooling performance. Its compact design allows for easy installation, making it an ideal choice for various settings such as retail spaces, schools, and office buildings.

One of the standout features of the Carrier 50JS is its innovative energy efficiency. Equipped with a high-efficiency scroll compressor, it significantly reduces energy consumption while providing reliable climate control. This model boasts a commendable SEER (Seasonal Energy Efficiency Ratio) rating, which translates to lower utility bills and a reduced carbon footprint, meeting modern energy efficiency standards.

The 50JS unit utilizes R-410A refrigerant, an environmentally friendly option that contributes to its low global warming potential compared to traditional refrigerants. This aligns with Carrier's commitment to sustainability and reducing environmental impact.

Another significant characteristic of the 50JS is its advanced controls and intelligent building integration capabilities. The unit comes with a microprocessor-based control system that allows for precise temperature management and can be easily integrated into building automation systems. This feature enhances user experience, providing real-time data and better management of HVAC operations.

Noise reduction technology is also a key design focus of the Carrier 50JS. The unit incorporates sound-attenuating materials and features that minimize operational noise, making it suitable for noise-sensitive environments like offices and educational institutions.

In terms of air quality, the 50JS offers various filtration options, including high-efficiency filters that remove airborne particulates. This results in cleaner, healthier indoor air, which is crucial for occupant comfort and well-being.

Furthermore, the rooftop unit is built to withstand harsh weather conditions, featuring a durable cabinet constructed from galvanized steel with a corrosion-resistant finish. This enhances the unit's longevity and reliability over time.

In conclusion, the Carrier 50JS rooftop unit stands out in the commercial HVAC market due to its energy efficiency, advanced controls, quiet operation, and robust design. It represents a blend of state-of-the-art technology and practical features, making it a preferred choice for those looking to invest in reliable and sustainable climate control solutions.