Uvod
This instruction manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your VEVOR 3 CFM 1/4 HP Single Stage HVAC Vacuum Pump. Please read this manual thoroughly before using the product and retain it for future reference. This vacuum pump is designed for various applications including HVAC system evacuation, refrigeration, and automotive air conditioning maintenance.

Figure 1: VEVOR 3 CFM Vacuum Pump with Manifold Gauge Kit in typical applications.
Pomembna varnostna navodila
Pri uporabi električnih naprav vedno upoštevajte osnovne varnostne ukrepe, da zmanjšate tveganje požara, električnega udara in telesnih poškodb.
- Preberite vsa navodila: Familiarize yourself with the product's operation and safety guidelines.
- Električna varnost: Prepričajte se, da napajalnik ustreza voltage specified on the pump's label. Do not operate the pump with a damaged cord or plug. Avoid using extension cords unless absolutely necessary and ensure they are rated for the pump's power requirements.
- Prezračevanje: Operate the pump in a well-ventilated area to prevent overheating and accumulation of refrigerant vapors.
- Osebna zaščitna oprema (PPE): Always wear safety glasses and gloves when handling refrigerants or operating the vacuum pump.
- Ravnanje s hladilnim sredstvom: Be aware of the specific safety requirements for the refrigerants you are working with. Some refrigerants are flammable or toxic.
- Raven olja: Regularly check the oil level and ensure it is within the specified range before and during operation. Operating without sufficient oil can damage the pump.
- Vroče površine: Motor in ohišje črpalke se lahko med delovanjem segrejeta. Izogibajte se neposrednemu stiku.
- Stabilnost: Črpalko postavite na stabilno, ravno površino, da preprečite prevračanje.
- Otroci in hišni ljubljenčki: Otroke in hišne ljubljenčke držite stran od delovnega območja.
Vsebina paketa
Verify that all items are present and undamaged upon unpacking. If any parts are missing or damaged, contact VEVOR customer service.
- 1 x VEVOR 3 CFM 1/4 HP Single Stage Vakuumska črpalka
- 1 x Multifunctional Manifold Gauge Set
- 3 x Color-Coded Hoses (Yellow, Blue, Red)
- 2 x Adjustable Quick Couplers
- 1 x Bottle of Vacuum Pump Oil (Note: Oil may be shipped separately or not included depending on region/regulations)
- 1 x Navodila za uporabo

Figure 2: Included components of the VEVOR Vacuum Pump Kit.
Lastnosti izdelka
The VEVOR 3 CFM 1/4 HP Single Stage HVAC Vacuum Pump is engineered for reliable performance and durability.
- Visoka učinkovitost: Features a 3 CFM (85 L/min) flow rate and 1/4 HP motor for quick and effective vacuuming.
- Vzdržljiva konstrukcija: Equipped with a robust die-cast aluminum housing and a strong copper motor for extended service life.
- Stabilno delovanje: Four rubber feet provide enhanced stability and minimize vibration during use.
- Anti-Oil Reflux Design: Prevents oil from flowing back into the system, protecting connected equipment.
- Učinkovito odvajanje toplote: Enlarged heat-sink holes and a cooling fan ensure rapid heat dissipation, preventing overheating.
- Oil Sight Window: A clear oil sight window allows for easy monitoring of oil levels and quality.
- Multifunctional Manifold Gauge: Includes a two-valve manifold gauge set with clear pressure readings for precise system monitoring.
- Color-Coded Hoses: Three durable, color-coded hoses (yellow, blue, red) with SAE 1/4" (6.35 mm) brass fittings for easy identification and connection.

Figure 3: Key features of the VEVOR Vacuum Pump, including copper motor and aluminum housing.

Figure 4: Oil sight window and heat dissipation features.
Specifikacije
| Parameter | Vrednost |
|---|---|
| Model | RS-1 |
| voltage | 220 V 50 Hz |
| Flow Rate (Air Displacement) | 3 CFM (85 L/min) |
| Moč | 1 / 4 HP |
| Končni vakuum | 5 Pa |
| Stage | 1 |
| Kapaciteta olja | 220 ml |
| Merilnik razdelilnika | 2-smerni |
| Velikost priključka cevi | SAE 1/4" (6.35 mm) |
| High Pressure (Manifold Gauge) | 0 ~ 800 PSI |
| Low Pressure (Manifold Gauge) | 0 ~ 500 PSI |
| Max Working Pressure (Hose) | 800 PSI |
| Hose Burst Pressure | 4000 PSI |
| Mere izdelka (D x Š x V) | 10.9 x 24.4 x 21.1 cm (4.3 x 9.6 x 8.3 palca) |
| Teža izdelka | 7.32 kg (16.14 lbs) |

Figure 5: Product dimensions and typical applications.
Nastavitev
Follow these steps for initial setup before operating the vacuum pump.
- Razpakirajte in preglejte: Previdno vzemite vse komponente iz embalaže. Preverite, ali so bile med pošiljanjem poškodovane.
- Dodajte olje vakuumske črpalke:
- Locate the oil fill cap on top of the pump.
- Odstranite pokrovček in počasi vlijte priloženo olje vakuumske črpalke v rezervoar.
- Monitor the oil level through the oil sight window. Fill until the oil level is between the 'MIN' and 'MAX' marks. Do not overfill.
- Pokrovček za dolivanje olja trdno namestite nazaj.

Figure 6: Oil sight window with MIN/MAX indicators.
- Umestitev: Place the vacuum pump on a firm, level, and dry surface. Ensure adequate ventilation around the pump.
- Električna povezava: Connect the power cord to a grounded electrical outlet that matches the pump's voltage zahteve.
Navodila za uporabo
This section outlines the general procedure for using the vacuum pump with the manifold gauge set for HVAC/refrigeration systems. Always refer to the specific service manual for the equipment you are working on.
- Pripravite sistem: Ensure the HVAC/refrigeration system is depressurized and all service ports are accessible.
- Priključite merilnik razdelilnika:
- Connect the blue hose (low pressure) to the low-side service port of the system.
- Connect the red hose (high pressure) to the high-side service port of the system.
- Connect the yellow hose (service hose) from the manifold gauge's central port to the vacuum pump's inlet port.

Figure 7: Manifold gauge connections diagram.

Figure 8: Color-coded hoses connected to an HVAC unit.
- Odprti razdelilniki ventilov: Fully open both the high-side and low-side valves on the manifold gauge set.
- Start Vacuum Pump: Turn on the vacuum pump. The pump will begin to evacuate air and moisture from the system.
- Monitor vakuuma: Observe the low-pressure gauge on the manifold. The needle should drop into the vacuum range. Continue running the pump until the desired vacuum level is achieved, typically for a specified duration based on system size and conditions.
- Isolate Pump: Once the desired vacuum is reached, close both the high-side and low-side valves on the manifold gauge set. Then, turn off the vacuum pump.
- Vacuum Hold Test: Allow the system to sit under vacuum for a period (e.g., 15-30 minutes) and monitor the gauge. If the vacuum holds steady, the system is leak-free. If the pressure rises, there may be a leak that needs to be addressed.
- Prekini povezavo: After a successful vacuum hold test, slowly open the manifold valves to release the vacuum from the hoses, then disconnect the hoses from the system and the pump.
Vzdrževanje
Redno vzdrževanje zagotavlja optimalno delovanje in podaljšuje življenjsko dobo vaše vakuumske črpalke.
- Menjava olja: Vacuum pump oil should be changed regularly, especially if it appears cloudy, discolored, or contaminated.
- To Change Oil:
- Prepričajte se, da je črpalka izklopljena in ohlajena.
- Place a suitable container under the oil drain plug (usually located at the bottom or side of the pump).
- Remove the oil drain plug and the oil fill cap to allow the old oil to drain completely.
- Replace the drain plug and refill with new, clean vacuum pump oil as described in the 'Setup' section.
- Čiščenje: Keep the exterior of the pump clean and free of dust and debris. Ensure the cooling fins and fan area are clear for proper airflow.
- Shranjevanje: When not in use, store the pump in a dry, clean environment. Ensure the oil is at the correct level before storing for extended periods.
Odpravljanje težav
Za pogoste težave in njihove možne rešitve glejte ta razdelek.
| Težava | Možen vzrok | rešitev |
|---|---|---|
| Črpalka se ne zažene | Brez napajanja Poškodovan napajalni kabel/vtič Preobremenitev motorja | Preverite napajalni priključek in vtičnico Inspect cord/plug for damage; replace if necessary Pustite, da se motor ohladi; preverite morebitne ovire |
| Črpalka deluje, vendar ne ustvarja vakuuma | Nizek nivo olja Kontaminirano olje Leaky connections System leak | Dolijte olje do pravilne ravni Zamenjajte olje Zategnite vse priključke cevi Perform leak detection on the system |
| Črpalka je hrupna ali prekomerno vibrira | Nizek nivo olja Kontaminirano olje Nestabilna površina Notranja poškodba | Preverite in dodajte olje Zamenjajte olje Place pump on a stable, level surface Contact VEVOR support |
| Oil appears milky or cloudy | Kontaminacija z vlago | Change oil immediately; ensure system is dry before vacuuming |
Garancija in podpora
Izdelki VEVOR so zasnovani za vzdržljivost in zmogljivost. Za posebne informacije o garanciji glejte garancijski list, ki je priložen izdelku, ali obiščite uradno spletno stran VEVOR. website. If you encounter any issues or require technical assistance, please contact VEVOR customer support through their official channels. Provide your product model number (RS-1) and purchase details for efficient service.

Figure 9: Extensive applications of the VEVOR Vacuum Pump.