Carrier 50VT-A installation instructions Troubleshooting, START-UP Checklist, System Information

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50VT-- A

Puron (R-410A) Refrigerant Charging

Refer to unit information plate and charging chart. Some R-410A refrigerant cylinders contain a dip tube to allow liquid refrigerant to flow from cylinder in upright position. For cylinders equipped with a dip tube, charge Puron units with cylinder in upright position and a commercial metering device in manifold hose. Charge refrigerant into suction-line.

Step 13 — System Information

Loss of Charge Switch

The loss of charge switch is a protective device wired into control circuit (low voltage). It shuts off the compressor if abnormally low pressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigeration system under pressure, it is not advisable to remove this device for troubleshooting unless you are reasonably certain that a problem exists. If switch must be removed, remove and recover all system charge so that pressure gauges read 0 psig. Never open system without breaking vacuum with dry nitrogen.

Check Defrost Thermostat

The defrost thermostat is usually located on the lowest liquid leaving circuit of the left condenser coil (see Fig. 22). The thermostat closes at 32_F (0_C) and opens at 65_F (18_C).

The defrost thermostat signals heat pump that conditions are right for defrost or that conditions have changed to terminate defrost. It is a thermally actuated switch clamped to outdoor coil to sense its temperature. Normal temperature range is closed at 32_  3_F (0

1.7_C) and open at 65_  5_F (18 2.8_C).

NOTE: The defrost thermostat must be located on the liquid side of the outdoor coil on the bottom circuit and as close to the coil as possible.

FEEDER TUBE

STUB TUBE

DEFROST

THERMOSTAT

C99029

Fig. 22 - Defrost Thermostat

TROUBLESHOOTING

Refer to the Cooling and Heating Troubleshooting Chart (Table 10) for troubleshooting information.

START-UP CHECKLIST

Use the Start-Up Checklist.

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Contents Table of Contents Safety ConsiderationsReceiving and Installation IntroductionCheck Equipment Provide Unit Support50VT-A24-30 Unit Dimensions 50VT-A36-60 Unit Dimensions Large Curb Rig and Place Unit InspectionRigging/Lifting of Unit See Fig Unit Falling HazardSelect and Install Ductwork Personal Injury HazardInstall Electrical Connections Provide for Condensate DisposalHigh-Voltage Connections Unit Component Damage HazardSpecial Procedures for 208-V Operation Accessory Electric Heaters InstallationStandard Connections Control Voltage ConnectionsPhysical Data Unit 50VT-A Minimum Airflow for Reliable Electric Heater Operation CFMConnection 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 Adjustments START-UPCheck for Refrigerant Leaks Checking Cooling and Heating Control OperationChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsTwo 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 Dry Coil Air Delivery Downflow Discharge Horizontal and Downflow Filter Pressure Drop Table IN. W.CElectric Heat Pressure Drop Table in. W.C Small Cabinet Electric Heat Pressure Drop Table in. W.C Large CabinetMaintenance Air FilterIndoor Blower and Motor Personal Injury and Unit Damage HazardCooling Charging Table-Subcooling OF2 Electrical Controls and Wiring Outdoor Coil, Indoor Coil, and Condensate Drain PanOutdoor Fan Refrigerant CircuitPressure Switches Loss of Charge SwitchHigh-Pressure Switch Copeland Scroll Compressor Puron RefrigerantSTART-UP Checklist TroubleshootingSystem Information Puronr R-410A Quick Reference Guide Troubleshooting Chart Symptom Cause RemedyTemperatures Remove and Store in Job FilesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor AmpsCatalog No 50VT---09SI
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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.