50GS, 50GX Single Packaged Electric Cooling Units

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Installation, Start-Up, and Operating Instructions

50GS Sizes 018-060, 50GX Sizes 024-060

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

This symbol indicates a change since the last issue.

TABLE OF CONTENTS

 

SAFETY CONSIDERATIONS

1

Introduction

2

RECEIVING AND INSTALLATION

2

Check Equipment

2

IDENTIFY UNIT

2

INSPECT SHIPMENT

2

Provide Unit Support

2

ROOF CURB

2

SLAB MOUNT

2

GROUND MOUNT

2

Provide Clearances

2

Field Fabricate Ductwork

2

Rig and Place Unit

2

INSPECTION

3

INSTALLATION

3

Connect Condensate Drain

7

Install Duct Connections

7

CONFIGURING UNITS FOR DOWNFLOW (VERTI-

CAL) DISCHARGE

8

Install Electrical Connection

9

HIGH-VOLTAGE CONNECTIONS

10

SPECIAL PROCEDURES FOR 208-V OPERATION ...

10

CONTROL VOLTAGE CONNECTIONS

10

STANDARD CONNECTION

10

TRANSFORMER PROTECTION

13

PRE-START-UP

13

START-UP

14

CHECK FOR REFRIGERANT LEAKS

14

START UP COOLING SECTION AND MAKE ADJUST-

MENTS

14

CHECKING COOLING CONTROL OPERATION

14

CHECKING AND ADJUSTING REFRIGERANT

CHARGE

14

INDOOR AIRFLOW AND AIRFLOW ADJUST-

MENTS

18

For 208/230V

18

FOR 460-V GE MOTORS

18

COOLING SEQUENCE OF OPERATION

18

MAINTENANCE

18

AIR FILTER

22

EVAPORATOR BLOWER AND MOTOR

22

CONDENSER COIL, EVAPORATOR COIL, AND CON-

DENSATE DRAIN PAN

24

CONDENSER FAN

24

ELECTRICAL CONTROLS AND WIRING

24

REFRIGERANT CIRCUIT

24

EVAPORATOR AIRFLOW

25

METERING DEVICE — ACUTROL DEVICE

.............25

LIQUID LINE STRAINER

25

Troubleshooting

25

Start-Up Checklist

25

NOTE TO INSTALLER — Before the installation, READ THESE INSTRUCTIONS CAREFULLY AND COMPLETELY. Also, make sure the User’s Manual and Replacement Guide 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. Consult a qualified installer or service agency for information or assistance. The qualified in- staller or agency must use only factory-authorized kits or acces- sories when modifying this product.

C99001

Fig. 1—Unit 50GS and 50GX

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

Book

1

6

PC 101

Catalog No. 535–00130

Printed in U.S.A.

Form 50GS,GX-4SI

Pg 1

9–03

Replaces: 50GS,GX-3SI

Tab

6 8

 

 

 

 

 

 

 

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Carrier 50GX, 50GS instruction manual Table of Contents, Safety Considerations

50GX, 50GS specifications

Carrier has long been a leader in the HVAC industry, and its latest offerings, the 50GX and 50GS series, continue this tradition. These units stand out for their robust design, advanced technology, and energy-efficient operation, making them ideal choices for commercial and light industrial applications.

The Carrier 50GX is a packaged rooftop unit known for its innovative features aimed at enhancing energy efficiency while ensuring optimal indoor air quality. It employs a variable-speed compressor, which allows for precise temperature control and reduced energy consumption. The 50GX is equipped with microprocessor controls that optimize performance and simplify maintenance, offering real-time diagnostics and monitoring.

One of the standout technologies in the 50GX is its use of R-410A refrigerant, a greener alternative that reduces environmental impact without compromising cooling performance. This refrigerant is designed to deliver superior cooling efficiency while meeting strict environmental regulations. Additionally, the system features an integrated economizer, which takes advantage of outside air to improve energy efficiency during cooler months, reducing reliance on mechanical cooling.

The 50GS series, while similar in many respects to the 50GX, is tailored for applications requiring heating solutions. These units offer gas heat as an option, providing flexibility for varying climate conditions. The 50GS also incorporates an advanced heat exchanger design that maximizes heat transfer efficiency and reduces operational costs.

Both the 50GX and 50GS units are built with durability in mind. They feature a galvanized steel cabinet with a powder-coated finish, providing resistance to rust and corrosion. The robust construction ensures a long lifespan even in challenging environments.

Maintenance is made easier with these models, thanks to their accessible design that allows for quick servicing. Both the 50GX and 50GS units come with a host of customizable options, including different airflow configurations and additional filtration systems to enhance air quality.

In conclusion, the Carrier 50GX and 50GS series represent the pinnacle of HVAC technology with their focus on energy efficiency, environmental sustainability, and robust construction. These units are ideal for customers looking to invest in reliable and efficient climate control solutions for their facilities, combining advanced technology with time-tested engineering.