Carrier 50VT-A installation instructions Table of Contents, Safety Considerations

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50VT---A

Performancet 14 SEER Single---Packaged Heat Pump System with Puron® (R---410A) Refrigerant

Single and Three Phase

2---5 Nominal Tons (Sizes 24---60)

Installation Instructions

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

NOTE: Installer: Make sure the Owner’s Manual and Service Instructions are left with the unit after installation.

TABLE OF CONTENTS

 

 

PAGE

SAFETY CONSIDERATIONS

. . . 1

INTRODUCTION

. . . 2

RECEIVING AND INSTALLATION

. 2-9

Check Equipment

. . . 2

Identify Unit

. . . 2

Inspect Shipment

. . . 2

Provide Unit Support

. . . 2

Roof Curb

. . . 2

Slab Mount

. . . 2

Provide Clearances

. . . 2

Rig and Place Unit

. . . 6

Inspection

. . . 6

Rigging/Lifting of Unit

. . . 6

Select and Install Ductwork

. . . 7

Converting Horizontal Discharge Units to Downflow

 

(Vertical) Discharge Units

. . . 7

Provide for Condensate Disposal

. . . 8

Install Electrical Connections

. . . 8

High-Voltage Connections

. . . 8

Special Procedures for 208-V Operation

. . . 9

Control Voltage Connections

. . . 9

Standard Connections

. . . 9

Transformer Protection

. . . 9

Accessory Electric heaters Installation

. . . 9

Sequence of Operation

. . . 9

PRE-START-UP

. . 17

START-UP

17-20

Checking Cooling & Heating Control Operation

. . 17

Check for Refrigerant Leaks

. . 17

Start-Up Adjustments

. . 17

Checking & Adjusting Refrigerant Charge

. . 18

Indoor Airflow & Airflow Adjustments

. . 18

Continuous Fan Operation

. . 19

Defrost Control

. . 20

Quiet Shift

. . 20

Defrost

. . 20

MAINTENANCE

23-28

Air Filter

. . 23

Indoor Blower and Motor

. . 23

Outdoor Coil, Indoor Coil, & Condensate Drain Pan . . . .

. . 26

Outdoor Fan

. . 26

Electrical Controls and Wiring

. . 26

Refrigerant Circuit

. . 26

Indoor Airflow

. . 26

Metering Devices- TXV & Piston

. . 26

Pressure Switches

. . 27

Loss of Charge Switch

. . 27

High Pressure Switch

. . 27

A09033

Fig. 1 - Unit 50VT-A

Copeland Scroll compressor (Puron Refrigerant) . . . . . . . . . 27 Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Servicing Systems on Roofs with Synthetic Materials . . . . 27 Liquid Line Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 PuronR (R-410A) Refrigerant Charging . . . . . . . . . . . . . 28 System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Loss of Charge Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Check Defrost Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . 28 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due to mechanical and electrical components. Only trained and qualified personnel should install, repair, or service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. When working on this equipment, observe precautions in the literature, on tags, and on labels attached to or shipped with the unit and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes, the current editions of the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian Electrical Code CSA C22.1.

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Contents Safety Considerations Table of ContentsIntroduction Receiving and InstallationCheck Equipment Provide Unit Support50VT-A24-30 Unit Dimensions 50VT-A36-60 Unit Dimensions Large Curb Inspection Rig and Place UnitRigging/Lifting of Unit See Fig Unit Falling HazardPersonal Injury Hazard Select and Install DuctworkProvide for Condensate Disposal Install Electrical ConnectionsHigh-Voltage Connections Unit Component Damage HazardAccessory Electric Heaters Installation Special Procedures for 208-V OperationStandard Connections Control Voltage ConnectionsMinimum Airflow for Reliable Electric Heater Operation CFM Physical Data Unit 50VT-AConnection Wiring Schematics 208/230-1-60 Cont. Ladder Wiring Schematics 208/230-1-60 50VT a Cont. Ladder Wiring Schematics 208/230-3-60 Connection Wiring Diagram Cont. Ladder Wiring Diagram START-UP Start-Up AdjustmentsCheck for Refrigerant Leaks Checking Cooling and Heating Control OperationIndoor Airflow and Airflow Adjustments Checking and Adjusting Refrigerant ChargeTwo Cooling Fan Speeds Set-up Dehumidification feature used Unit Operation HazardContinuous Fan Operation Single Speed Cooling With Higher Electric Heat SpeedColor Coding for Indoor Fan Motor Leads Quiet Shift Defrost ControlDefrost Horizontal and Downflow Filter Pressure Drop Table IN. W.C Dry Coil Air Delivery Downflow DischargeElectric Heat Pressure Drop Table in. W.C Large Cabinet Electric Heat Pressure Drop Table in. W.C Small CabinetAir Filter MaintenanceIndoor Blower and Motor Personal Injury and Unit Damage HazardCooling Charging Table-Subcooling OF2 Outdoor Coil, Indoor Coil, and Condensate Drain Pan Electrical Controls and WiringOutdoor Fan Refrigerant CircuitLoss of Charge Switch Pressure SwitchesHigh-Pressure Switch Copeland Scroll Compressor Puron RefrigerantSTART-UP Checklist TroubleshootingSystem Information Puronr R-410A Quick Reference Guide Symptom Cause Remedy Troubleshooting ChartRemove and Store in Job Files TemperaturesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor AmpsCatalog No 50VT---09SI
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Manual 6 pages 26.5 Kb

50VT-A specifications

Carrier’s 50VT-A and 50EZ-A series exemplify cutting-edge advancements in heating, ventilation, and air conditioning (HVAC) technology. These products are engineered to meet diverse climate control needs in residential and commercial applications while ensuring operational efficiency and superior indoor air quality.

The Carrier 50VT-A series stands out with its variable-speed technology, which allows for precise temperature control by adjusting the cooling or heating output based on current demand. This capability not only optimizes energy consumption but also enhances comfort by eliminating temperature swings. The 50VT-A units are equipped with hybrid heat technology, which enables seamless integration with alternative heating sources, providing flexibility in energy use.

On the other hand, the Carrier 50EZ-A offers a unique solution for those seeking efficient and reliable climate control in a more compact design. This series incorporates advanced inverter technology, which continuously adjusts the compressor speed, ensuring that the system operates at the utmost efficiency regardless of environmental conditions. The result is significant energy savings and quieter operation compared to traditional units.

Both series feature intelligent refrigerant management, utilizing R-410A refrigerant, which is environmentally friendly and designed to reduce greenhouse gas emissions. The systems are engineered with robust insulation and sound-dampening materials, minimizing noise levels for a peaceful indoor environment.

In addition to their impressive technical specifications, the Carrier 50VT-A and 50EZ-A units come equipped with smart controls, allowing users to monitor and adjust settings remotely through mobile applications. This connectivity feature empowers homeowners and businesses to manage energy consumption, set schedules, and receive maintenance alerts, ensuring optimal performance at all times.

Durability is an important characteristic of both series, as they are designed to withstand various environmental conditions. With corrosion-resistant coatings and high-grade materials, these units promise longevity and reliable performance over their operational lifespan.

In summary, Carrier’s 50VT-A and 50EZ-A series offer an innovative blend of efficiency, advanced technology, and user-friendly features. Whether for residential or commercial applications, these systems provide exceptional comfort, lower energy costs, and an environmentally conscious choice for modern HVAC solutions.