50ZHA024-060 Packaged Heat Pump Units

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Installation, Start-Up and Service Instructions

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

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

SLAB MOUNT

2

GROUND MOUNT

2

Provide Clearances

2

Place Unit

2

Select and Install Ductwork

2

CONVERTING HORIZONTAL DISCHARGE

UNITS TO DOWNFLOW (VERTICAL) DIS-

CHARGE

4

Provide for Condensate Disposal

4

Install Electrical Connections

5

HIGH-VOLTAGE CONNECTIONS

5

ROUTING POWER LEADS INTO UNIT

6

CONNECTING GROUND LEAD TO UNIT GROUND .6

ROUTING CONTROL POWER WIRES

6

ACCESSORY ELECTRIC HEAT WIRING

6

PRE-START-UP

6

START-UP

7

Check for Refrigerant Leaks

8

LOCATE AND REPAIR REFRIGERANT LEAKS AND

CHARGE THE UNIT AS FOLLOWS:

8

Start-Up Cooling Section and Make Adjustments

8

CHECKING COOLING CONTROL OPERATION

8

Refrigerant Charge

8

NO CHARGE

8

LOW CHARGE COOLING

9

HEATING MODE CHARGE

9

Indoor Airflow and Airflow Adjustments

9

FOR 208/230-V

13

Unit Controls

13

HIGH-PRESSURE RELIEF VALVE

13

LOSS OF CHARGE SWITCH

13

COMPRESSOR OVERLOAD

13

Sequence of Operation

13

FAN OPERATION

13

COOLING

14

HEATING

14

CONTINUOUS FAN

14

DEFROST

14

ELECTRIC RESISTANCE HEATING

14

MAINTENANCE

15

Air Filter

15

Unit Top Removal (Outdoor-Coil Side)

15

 

A05194

Fig. 1—Unit 50ZHA

 

Indoor Blower and Motor

15

Outdoor Coil, Indoor Coil, and Condensate Drain Pan

16

Outdoor Fan

16

Electrical Controls and Wiring

16

Refrigerant Circuit

17

Indoor Airflow

17

Metering Devices

17

Lubrication

17

Liquid Line Strainer

17

High Flow Valves

17

TROUBLESHOOTING

17

START-UP CHECKLIST

17

NOTE TO INSTALLER—Before 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 workers should install, repair, or service air-conditioning equipment.

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

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

Printed in U.S.A.

Catalog No. 50ZHA-1SI

Pg 1

9-05

Replaces: New

Tab

6 8

 

 

 

 

 

 

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Carrier 50ZHA024-060 instruction manual Table of Contents, Safety Considerations

50ZHA024-060 specifications

The Carrier 50ZHA024-060 is a remarkable rooftop unit designed for commercial applications, providing both cooling and heating solutions in a compact and efficient manner. Known for its reliability and advanced engineering, this model is ideal for businesses seeking to optimize indoor comfort while maintaining energy efficiency.

One of the key features of the 50ZHA unit is its advanced scroll compressor technology. This innovation not only ensures quiet operation but also offers superior efficiency, reducing operational costs. The unit is designed to deliver a wide range of capacity options, from 24,000 to 60,000 BTU/h, making it versatile for various building sizes and requirements.

The 50ZHA series employs a microprocessor-based control system that enhances user convenience and operational efficiency. This smart technology enables precise temperature control, scheduling, and diagnostics. Furthermore, it offers compatibility with advanced building management systems, allowing for seamless integration into modern HVAC setups.

Energy efficiency is a hallmark of the Carrier 50ZHA024-060, which is equipped with environmentally friendly refrigerants that meet current regulatory standards. This commitment to sustainability is further emphasized by its exceptional SEER and EER ratings, indicating lower energy consumption without compromising performance.

In terms of construction, the 50ZHA series features a robust design with corrosion-resistant materials, ensuring durability even in harsh environmental conditions. The unit’s compact rooftop design simplifies installation and reduces the footprint, making it an excellent choice for urban areas where space is limited.

Moreover, the Carrier 50ZHA models are equipped with advanced filtration systems that improve indoor air quality by minimizing airborne contaminants. This is particularly beneficial for commercial spaces, where maintaining a healthy environment is crucial for employee productivity and wellbeing.

The 50ZHA024-060 also offers various customizable options, including economizers for increased fresh air intake and enhanced humidity control features. These options allow businesses to tailor their HVAC solutions to specific operational needs, ensuring optimal comfort year-round.

In summary, the Carrier 50ZHA024-060 is an exceptional rooftop unit that combines advanced technology, energy efficiency, and user-friendly controls. Its sturdy construction, along with a range of customizable features, makes it a leading choice for commercial HVAC applications, ensuring sustained performance and comfort in diverse settings.