50JS,JX018-060 Single-Package Heat Pump Units

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Installation, Start-Up and Service Instructions

NOTE: Read the entire instruction manual before starting the installation.

Index

 

SAFETY CONSIDERATIONS

1-4

General

4

RECEIVING AND INSTALLATION

4-15

Check Equipment

4-5

Identify Unit

4

Inspect Shipment

5

Provide Unit Support

5

Roof Curb

5

Slab Mount

5

Ground Mount

5

Provide Clearances

5

Rig and Place Unit

5-6

Select and Install Ductwork

6-8

Converting Horizontal Discharge Units to Downflow (Vertical)

Discharge

6

Provide for Condensate Disposal

6-8

Install Electrical Connections

8

High-Voltage Connections

8

Routing Power Leads Into Unit

8-14

Connecting Ground Lead to Ground Lug

14

Special Procedures for 208-V Operation

15

PRE-START-UP

15

START-UP

15-20

Check for Refrigerant Leaks

15

Unit Start-Up Adjustment

15-20

MAINTENANCE

20-23

SYSTEM INFORMATION

23

Time Delay Relay

23

Pressure Switches

23

Defrost Thermostat

23

TROUBLESHOOTING

24-25

START-UP CHECKLIST

25

NOTE TO INSTALLER Ð READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY before installing this unit. Also, make sure the Owner's Manual and Service Instructions are left with the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance functions of cleaning coils and filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

C99001

Fig. 1ÐModel 50JS/JX

Improper installation, adjustment, alteration, service, mainte- nance, or use can cause explosion, fire, electric shock, or other occurrences, which could cause serious injury or death or damage your property. Consult a qualified installer or service agency for information or assistance. The qualified installer or agency must use only factory-authorized kits or accessories when modifying this product.

Recognize safety information. This is the safety-alert symbol . When you see this symbol on the product or in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words Ð DANGER, WARNING, CAU- TION, and NOTE. Danger identifies the most serious hazards, which will result in severe personal injury or death. Warning indicates a condition that could cause serious personal injury or death. Caution is used to identify unsafe practices, which would result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability or operation.

1.The power supply (volts, phase, and hertz) must correspond to that specified on unit rating plate.

2.The electrical supply provided by the utility must be sufficient to handle load imposed by this unit.

3.This installation must conform with local building codes and with NEC (National Electrical Code). Refer to provincial and local plumbing or waste water codes and other applicable local codes.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book

1

4

PC 101

Catalog No. 565-057

Printed in U.S.A.

Form 50JS,JX-1SI

Pg 1

5-00

Replaces: 50JX-2SI

Tab

5a

5a

 

 

 

 

 

 

 

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Carrier 50JS instruction manual Receiving and Installation, Maintenance, Troubleshooting, Safety Considerations

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.