NAVAC NP5DP Pro Series Vacuum Pump User Manual

Vacuum Pump
NP5DP NP7DP
User Manual NAVAC Inc.
www.NavacGlobal.com
Tel/Fax: +1 877 MY-NAVAC
877 696 2822
MADE IN PRC

Falure to folow warnings could resultin death or serious njury.
SAVETHIS MANUAL
FOR FUTURE REFERENCE

INTRODUCTION AND TECHNICAL INFORMATION

In order to make it easier to understand the components of the vacuum pump, please see the picture below. AC MOTOR DRIVEN VACUUM PUMPS

APPLICATION
NAVAC dual-stage rotary vane vacuum pumps are used to remove air, moisture, and other non- condensables from sealed HVACR systems. The products can be used for evacuation of HVACR repair and new installations, with refrigerants, such as R-12, R-22, R-410A, R-404A, R-134A, etc.

SPECIAL FEATURES

– Integrated pump structure, high precision, for deep ultimate vacuum level
– Forced oil lubrication ensures vane sealing, cooling and high reliabilty.
– Large and easy to see oil-level window design help prevent il supply shortage

PREPARATION PRIOR TO USING VACUUM PUMP

GROUNDING INSTRUCTIONS
This product must be grounded. In the event of an electrical shortcircuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This product is equipped with a cord having a grounding wire with an appropriate grounding plug. The plug must be plugged into an outlet thatis properly installed and grounded in accordance with all local codes and ordinances.
WARNING:
Improper installation of the grounding plug is able to resultin a risk of electric shock. When repair or replacement of the cord or plug is required, do not connect the grounding wire 1o either flat blade terminal. The wire with insulation having an outer surface that is green with or without yellow stripes is the grounding wire.
Check with a qualified electrician or serviceman when the grounding instructions are not completely understood, or when in doubt as to whether the product s properly grounded. Do not modify the plug provided;
it does notfitthe outlet, have the proper outletnstalled by a qualified electrician.

1. Verify the power supply being used to match the voltage on the nameplate.
2. Ensure that the pump s switched off prior to connecting to the power source.
3. Check for proper ol level, or change if needed.
4. Remove the oilillcap, flling oil to the level in between the two oil sight glass lines, as shown inthe: drawing below. For specific pump oil volume, please see the technical specification table.

Note: In order to prevent pump oil from spiling out, please add oil slowly. Switch on the power and the pump will begin to operate. After running for approximately one minute, check the ol level. If the il level is too low, switch off the machine and add the required exira oil Reinstall the ol fillcap.
Note: While the pump s operating, the oillevel should be in between the two ol position lines. If the oillevel s too low, it will reduce the performance and could damage the pump vanes. If the oil levelis too high, it could cause oilto discharge through the pump exhaust.

SAFETY WARNINGS

WARNING:
This machine should only be used for evacuation of refrigerant systems after refrigerant has been removed from the system and the system has been openedto atmosphere. This machine s not to be used as a transfer pump for liquids or any other media; doing so can damage the product.
Note: In order to avoid personal injury, please carefully read and follow the instructions in this user manual and the user guide of the pump.
NAVAC VACUUM PUMPS ARE NOT ALLOWED TO BE USED FOR A3 OR FLAMMABLE REFRIGERANTS.

1. NEVER CONNECT AVACUUM PUMP TO A PRESSURIZED SYSTEM. Always check to make sure that system and piping pressure is NOT ABOVE ATMOSPHERIC PRESSURE.
2. When handiing refrigerants, please wear an eye-protection such as safety glasses or goggles.
3. Avoid direct physical contact with refrigerants, you will get burned.
4. When connecting the power source, all equipments must be groundedin order to prevent electrical hazards.
5. Whenthe pumpis in operation, the enclosure surfaces will be hot. Do not touch the oil box or the motor case. Allow adequate ventilation space for heat dissipation
6. Notapplicable to R-32, 1234yfor other flammable refrigerants.
7. Keep pump dry and away from water, mud, and dirt atalltimes.
8. Operating pump with intake ittings open to the atmosphere must not exceed 3 minutes.
9. Ambient temperature range for pump use is 30 to 104°F (-1°C~40°C). The pump can be used in lower ambient conditions, if warmed up inside first and run for no more than 1 minute towarm the il priorto system evacuation
10. The power outlet must be grounded
11. Prior to connecting the vacuum pump to an A/C-R system, please use proper methods to remove refrigerant from a pressurized system. Note that pumping refrigerants under high-pressure conditions will damage the pump, and refrigerant must be removed using a recovery machine designed for that purpose.

CAUTION
~To reduce the risk of electric shock, do not expose to rain. Store indoors.
– When the product is reconnected for use on a nominal rating of 230V,the reconnection shall be made by qualified service personnel and the plug shallbe changedto NEMA 6-15P grounded type. EXTENSION CORDS
Itan extension cord mustbe used, be sure tis:

1. A3-wire extension cord that has a 3-blade grounding plug, and a 3-slot receptacle that will accept the plug on the product
2. Ingood condition
3. Nolongerthan 50′(15.2m)
4. 16 gauge (AWG) or larger. (Wire size increases as gauge number decreases. 14 AWG and 12AWG may also be used. DONOT USE 18 AWG )

NOTICE: Risk of Property Damage.
The use of an undersized extension cord will cause voltage to drop resulting in power loss tothe motor and overheating.

1. When using the vacuum pump, remove the inlet protection cap from the desired (1/4″, 3/8″, or 1/2°) connecting port, as shown in the diagram above, and connect the pump to the system or piping to be evacuated. Use shortest hoses possible for faster and more thorough evacuation
2. Inspectthe hose inlet connection, as well as all connecting hoses for proper seal. There mustbe no leakage or twill be impossible to draw the required deep vacuum level.
3. Atthe beginning of the evacuation process, open the GAS BALLAST, and once the vacuum gauge reaches 2000 microns, retighten to achieve desired vacuum level.
4. After evacuation is completed, shut down the pump and close the system access valves.
5. Tun offthe power switch on the pump and disconnect power.
6. Remove the evacuation hoses.
7. Close the air entry cap and the air exhaust cap tightly (with the exception of models without air exhaust cap), to preventdirt or particulates from entering the pump.

Note:

1. Always evacuate systems in conjunction with a micron vacuum gauge, such as the NAVAC NMV1, giving you a comprehensive view of the sealed system internal evacuation condition.
2. Please pay attention to any changes in the oil level during pump operation. If the oillevel falls below the center line, immediately add more vacuum pump oilto avoid damage to the pump.
3. Vacuum pump and oil must be above 30 F.

MAINTENANCE

Vacuum pump oil has three major functions: pump lubricant, pump cooling, and pump sealant  During the evacuation process, the pump oil will absorb moisture being pulled from the system, causingitto be less effective as alubricant and pump vane seal, extending evacuation time and possibly allowing the pump to overheat. We recommend thatthe oil be changed justbefore evacuating each A/C-R system toinsure the pump ol is in a clean condition as this is the key factor indetermining if the pump can achieve the required vacuum levels. In order to maintain the optimum operation of the pump, we recommend that you use NAVAC vacuum pump oil. This oilis made using a unique process and can maintain proper viscosity during normal operation and temperatures, andits also helpful for cold starts. Should the NAVAG oil not be available, reputable brands of special-purpose vacuum pump oil may be used.
Note: Should the pump oil become opaque, dirty, or full of moisture, promptly change oil. This will greally speed up evacuation, especially when there s a ot of moisture in system piping from having beenleft open to the atmosphere for an extended period of time.
Oil change procedure:

1. Toensure that the pump and oil are warm, run pump for approximately one minute prior to changing oil. Do not run longer than this, as it may be possible to damage the pump.
2. While the pump s running, open one inlet port and allow oil to drain out of the pump. After turning off pump, openthe oil drain plug, and drain used oil into an appropriate vessel and dispose of properly.
3. Asoilstops draining, tip the pump to drain any remaining oilin the bottom of the pump.
4. Close oil drain valve.
5. Remove oilfillcap, pourin new oil untilthe oilis at the proper level in the sightlass (the same procedure priorto using the pump above)

REQUIREMENTS FOR WARRANTY COVERAGE

Product warranty is provided for product quality problems for one years from date of sale. For ‘warranty to be valid, the following conditions must be met:

1. Products issues due to manufacturing defects confirmed by qualified agents.
2. Products which have not been maintained or dismantled by unauthorized parties.
3. Products that have been used in accordance with the User Manual. All maintenance services shall be performed during the warranty period.

Statement: Otherthan repairing the product defective, the manufacturer of this product will not be liable for any other costs, such as time spentin fixing the issue, refrigerant consumption, refrigerant disposal costs, as well as unauthorized transportation and labor costs.

TROUBLESHOOTING

Tighten the cap.
2.Damaged rubber ring inside the secondary air inlet connection cap.| Replace the rubber ring.
3.The volume of oil is insufficient.| Add oil to the center line of the oil display.
4.Pump oil becomes opaque or absorbed too many impurities.| Replace with new oil.
5.The pump’s oil entry hole is clogged or the oil supply is insufficient.| Clean the oil entry hole, clean the oil filter.
6.The pump connecting hoses, manifold or system has a leak.| Inspect the connecting hose gaskets and system, repair leaks.
7.The pump selection is wrong.| Check the size of the container to be evacuated, recalculate and select an appropriate pump model.
8.The pump has been used for too long, damage and wear to components caused increased gaps between parts.| Inspect and repair, or replace the pump.
Oil leak| 1.Damaged oil seal.| Replace the oil seal.
2.Loose or damaged oil box connections.| Tighten the connecting screws, replace 0-rings.
Oil spray| 1.Excessive oil volume.| Remove oil until the oil position line is reached.
2.Inlet port pressure is excessively high for a long period.| Select an appropriate pump, increase the pumping speed.
Start-up
problems| 1.Oil temperature is too low.| Place the vacuum pump in an over 77°F ambient environment for an hour, or replace in the 77°F oil.
2.Motor, power source or circuit board malfunctions.| Inspect and repair.
3.Foreign objects entered the pump.| Inspect and remove.
4.Voltage supply is excessively low or high.| Inspect the power source voltage.
5.Overload trips.| Afterr overload trip occurs, turn off the switch. Romoim the power plug. Examine and solve the issue.

Notes

1. The pump has over-current/ overload protection, please troubleshoot after overload resets
2. If the above methods cannot resolve your problems, please contact your nearest distributor or take the pump toa repair center. We will 4o our best o provide you with a quick turnaround o keep you working.

EXPLODED VIEW

REPAIR PARTS LIST

DEMENSIONS

Unit: inch

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>