INTRODUCTION

Welcome to the user manual for your VEVOR Vacuum Pump and Gauge Kit, designed to assist in maintaining your AC system. This tool kit includes a vacuum pump, vacuum gauge, hoses, and adapters, essential for vacuuming and recharging refrigerant in AC systems.

This manual provides comprehensive guidance on using the tool kit, explaining key features, components, and important safety guidelines to prevent risks or damage during maintenance.

This is a basic user guide for AC maintenance scenarios. Familiarity with AC maintenance operations and sufficient knowledge are recommended to avoid damage or injury.

Following the instructions and guidelines in this manual ensures the safe and effective use of your vacuum pump kit, enabling proper maintenance or repair of your AC system for optimal performance.

SAFETY PRECAUTIONS

This manual provides important warnings, precautions, and instructions. However, it cannot anticipate every possible situation. Operators must exercise good judgment, common sense, and caution.

Safety guidelines for handling your vacuum pump

• This kit is designed for vacuuming air or small amounts of residual refrigerant only. It should not be used to remove refrigerant directly from an AC system.
• For refrigerant recovery, a recovery machine is strongly recommended. Using a vacuum pump and recovery tank for refrigerant recovery without a machine should only be done by a trained and certified AC technician.
• Electrical shock hazard: Do not touch the vacuum pump with wet hands or while standing on a wet surface. Always use the pump in a dry environment and plug it into a properly grounded outlet.
• Fire hazard: Do not use the vacuum pump near flammable or combustible materials. Keep the pump away from heat sources or sparks, such as flames, cigarettes, or electrical appliances.
• Explosion hazard: Do not use the vacuum pump with flammable, explosive, or poisonous gases. Always check the Safety Data Sheet (SDS) of the gas before use. Do not exceed the specified pressure range for the pump.
• Corrosion hazard: Do not use the vacuum pump with gases that can corrode metals or exert chemical charges. Check compatibility of the gas with pump materials and accessories. Always use protective gloves and eyewear when handling corrosive materials.
• Never operate the pump without oil, as this can damage the pump and create potential hazards.

The temperature of the pumped gas should not exceed 80°C, and the environment temperature should be between 5°C and 60°C to prevent pump damage and ensure safe operation.

When unplugging, always pull the plug, not the wire, to prevent cord damage and potential hazards.

Do not use a damaged plug or outlet, as this can cause electrical shock or fire.

Safety guidelines for handling the gauge set

• Wear appropriate Personal Protective Equipment (PPE), such as safety glasses and gloves, especially when handling refrigerant, which can cause skin/eye irritation and be harmful if inhaled.
• Ensure the gauge set is properly connected and secured before use. Loose connections can lead to leaks, releasing refrigerant into the environment and creating a hazardous situation.
• Always use the gauge set in a well-ventilated area to avoid suffocation hazards from refrigerant vapors. If feeling dizzy or lightheaded, move to a well-ventilated area immediately.
• Do not exceed the maximum pressure rating of the gauge set and hoses, as indicated on the gauge or in the manual. Exceeding this can cause malfunction or rupture.
• Service hoses cannot withstand high temperatures or severe mechanical stress. Keep them away from moving or hot engine parts to prevent splitting or bursting, which can cause injury.
• Never use the gauge set for purposes other than those specified in the manual to avoid equipment damage, potential injury, or other hazards.

GETTING STARTED

Introducing the vacuum pump and gauge set series

The product series includes 4 SKUs, each designed for different user scenarios and intended purposes, based on the explosion-proof performance of the pump and accessories.

SKU1: 3.5 CFM Kit for AC

Designed for maintaining most home/vehicle AC or refrigerant systems using A1 refrigerant. Not suitable for systems with R32, R1234yf, or other A2L or above-level refrigerants.

SKU2: 4 CFM Kit for new AC

Designed for maintaining most AC or refrigerant systems. Its spark-less design allows use with R32, R1234yf (quick connect adapter not included), or other A2L refrigerants, as well as all A1 refrigerants.

SKU3: 4 CFM Kit for AC with leak detector

Designed for maintaining most AC or refrigerant systems using A1 refrigerant. Includes a leak detector to help locate system leaks.

SKU4: 3.5 CFM Kit for new vehicle AC

Designed for maintaining most home/vehicle AC or refrigerant systems using A1 refrigerant, and systems using A2L refrigerant due to its spark-less design. Comes with R134a quick connectors and R1234yf adapters for compatibility with older and newer vehicles.

Explanation of the vacuum pump's components and specification

The vacuum pump features several key components:

• GAS INLET
• HANDLE
• POWER SWITCH
• ELECTRICAL BOX
• VANE SHELL
• NAMEPLATE
• MOTOR
• BASE
• OIL/GAS SEPARATOR
• OIL LEVELLINE
• OIL PLUG
• TANK

Vacuum pump manifold gauge set package contents

The package includes the following items:

• Bag
• Charging Hose
• Manifold Gauge
• Manual
• Oil
• Leak Detector
• Vacuum Pump
• Quick Couplers (R134a)
• Cap Lifter
• Adapter (R410A)
• R1234yf to R134a coupler adapter

Package Content List

OPERATION GUIDE FOR PULLING VACUUM TO AC SYSTEM

1. Pump preparation: Insert the pump's plug and fill it with oil, ensuring not to exceed the maximum level.
2. Locate ports: Identify the high and low-pressure service ports of the AC system, typically near the compressor on the lines.
3. Connect hoses: Connect the gauge set hoses to the AC system's high (red marked) and low (blue marked) pressure service ports. Choose the appropriate adapter for the refrigerant system and fitting.
4. Attach hoses & run pump: Shut the valves on the gauge set, attach the hoses from the vacuum pump to the gauge set. Switch on the vacuum pump and let it run for a few minutes to confirm correct function.
5. Vacuuming: Open the valves on the gauge set and allow the vacuum pump to operate until the system pressure reaches approximately 30 inchHg and stabilizes. Continue pumping for at least 30 minutes to ensure all remaining air is removed.
6. Leak check: Shut the valves on the gauge and switch off the vacuum pump. Allow the system to rest for approximately 30 minutes. Any pressure increase on the gauge set indicates a leak.
7. Completion: Once no leaks are detected and the desired vacuum level is achieved, you can either charge the refrigerant or close the valve for future use.

MAINTENANCE OF VACUUM PUMP

Proper maintenance ensures optimal performance. Follow these guidelines:

• Keep the pump clean and free from foreign matter.
• Ensure the oil is filled to the oil level and never run the pump without oil.
• Keep the oil clean. If the oil becomes dirty, muddy, or contaminated with water or volatile substances, it will affect performance and the oil should be replaced. To replace oil: start the pump, run for 30 minutes to thin the oil, stop, drain oil from the plug. Open the gas inlet and run the pump for 1-2 minutes while adding a small quantity of clean oil to the gas inlet to flush residual oil. After cleaning, replace the drain plug and fill with clean pump oil to the oil level.
• For long-term storage, cover the oil cap and exhaust cap (if applicable) and store in a dry place.
• Pump repair should only be performed by a qualified service technician.

TROUBLESHOOTING GUIDE

EXPLODED DIAGRAM OF THE PUMP

The following table lists the components of the vacuum pump as shown in the exploded diagram: