NAVAC Mater Series User manual

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User Manual
NP12DA1
Ammonia Vacuum Pump
NAVAC Inc.
www.NavacGlobal.com
MADE IN CHINA
Tel/Fax: +1 877 MY-NAVAC
8 77 696 2822

In order to make it easier to understand the components of the vacuum pump, please see the
picture below.
DC INVERTER DRIVE VACUUM PUMPS
Model
Power Supply
Flow Rate ( CFM )
Ultimate Vacuum
Motor Power ( HP )
Oil Capacity ( oz )
Dimensions ( in )
Weight ( lbs )
Inlet Port
Accessory
APPLICATION
NAVAC inverter drive 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 including CFC, HFC, HCFC, and HCEF, such as
R-12, R-22, R-410A, R-404A, R-32, R-134A, R-1234yf, etc. This product is designed for Ammonia
(NH ) Systems.
SPECIAL FEATURES
- Forced oil lubrication ensures vane sealing, cooling and high reliability.
- Large and easy to see oil-level window design help prevent oil supply shortage.
- Non-sparking design, suitable for R-32, R-1234yf refrigerants.
01
INTRODUCTION AND TECHNICAL INFORMATION
TABLE OF CONTENTS
INTRODUCTION AND TECHNICAL INFORMATION
DC INVERTER DRIVE VACUUM PUMPS
APPLICATION
SPECIAL FEATURES
PREPARATION PRIOR TO USING VACUUM PUMP
SAFETY WARNINGS
USE GUIDE
MAINTENANCE
REQUIREMENT FOR WARRANTY COVERAGE
TROUBLESHOOTING
EXPLODED VIEW
REPAIR PARTS LIST
DIMENSION
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01
01
01
01
02
03
04
06
06
07
08
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09
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10
Industrial Grade Design
Gas ballast valve
Oil mist filter
Oil drain plug
Oil tank
Oil lens
Handle
KF25
Power switch
Rear cover
Motor
Base
NP12DA1
115V/60Hz
12 CFM
5 Micron
1/2
28
16.3"×6"×12.1"
32
KF25
KF25 Fitting
KF25
3

PREPARATION PRIOR TO USING VACUUM PUMP
2. Ensure that the pump is switched off prior to connecting to the power source.
1. Verify the power supply being used, to match the voltage on the nameplate.
4. Remove the oil fill cap, filling oil to the level in between the two oil sight glass lines, as shown in the
drawing below. For specific pump oil volume, please see the technical specification table.
3. Check for proper oil level, or change if needed.
Note: While the pump is operating, the oil level should be in between the two oil position lines. If the
level is too high, it could cause oil to discharge through the pump exhaust.
Switch on the power and the pump will begin to operate. After running for approximately one minute,
check the oil level. If the oil level is too low, switch off the machine and add the required extra oil.
Reinstall the oil fill cap.
oil level is too low, it will reduce the performance and could damage the pump vanes. If the oil
Note: In order to prevent pump oil from spilling out, please add oil slowly.
GROUNDING INSTRUCTIONS
This product must be grounded. In the event of an electrical short circuit, 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
that is properly installed and grounded in accordance with all local codes and ordinances.
WARNING – Improper installation of the grounding plug is able to result in a risk of electric shock.
When repair or replacement of the cord or plug is required, do not connect the grounding wire to
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 is properly grounded. Do not modify the plug
provided; if it does not fit the outlet, have the proper outlet installed by a qualified electrician.
GROUNDED
OUTLET
GROUNDING
PIN
SAFETY WARNINGS
manual and the user guide of the pump.
7. Keep pump dry and away from water, mud, and dirt at all times.
sure that system and piping pressure is NOT ABOVE ATMOSPHERIC PRESSURE.
Note: In order to avoid personal injury, please carefully read and follow the instructions in this user
NAVAC VACUUM PUMPS ARE NOT ALLOWED TO BE USED FOR A3 OR FLAMMABLE REFRIGERANTS.
1. NEVER CONNECT A VAUUM PUMP TO A PRESSURIZED SYSTEM. Always check to make
2. When handling refrigerants, please wear an eye-protection such as safety glasses or goggles.
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 opened to atmosphere. This machine is
not to be used as a transfer pump for liquids or any other media; doing so can damage the product.
3. Avoid direct physical contact with refrigerants, you will get burned.
electrical hazards.
5. When the pump is in operation, the enclosure surfaces will be hot. Do not touch the oil box or the
4. When connecting the power source, all equipments must be grounded in order to prevent
motor case. Allow adequate ventilation space for heat dissipation.
6. When using R-32, R-1234yf or other flammable refrigerants, use an explosion proof electrical
outlet.
8. Operating pump with intake fittings open to the atmosphere must not exceed 3 minutes.
remove refrigerant from a pressurized system. Note that pumping refrigerants under
recovery machine designed for that purpose.
oil prior to system evacuation.
high-pressure conditions will damage the pump, and refrigerant must be removed using a
lower ambient conditions, if warmed up inside first and run for no more than 1 minute to warm the
10. The pump requires 115V±10% power, and the power outlet must be grounded.
9. Ambient temperature range for pump use is 30 to 104°F (-1°C~40°C). The pump can be used in
11. Prior to connecting the vacuum pump to an A/C-R system, please use proper methods to
0302

0504
USE GUIDE
exhaust cap), to prevent dirt or particulates from entering the pump.
1. A 3-wire extension cord that has a 3-blade grounding plug, and a 3-slot receptacle that will accept
the plug on the product
NOTICE: Risk of Property Damage. The use of an undersized extension cord will cause voltage to
drop resulting in power loss to the motor and overheating.
If an extension cord must be used, be sure it is:
1. Always evacuate systems in conjunction with a micron vacuum gauge, such as the NAVAC
3. No longer than 50’ (15.2m)
2. Inspect the hose inlet connection, as well as all connecting hoses for proper seal. There must be
no leakage or it will be impossible to draw the required deep vacuum level.
gauge reaches 2000 microns, retighten to achieve desired vacuum level.
Note:
CAUTION-To reduce the risk of electric shock, do not expose to rain. Store indoors.
4. 16 gauge (AWG) or larger. (Wire size increases as gauge number decreases. 14 AWG and
12AWG may also be used. DO NOT USE 18 AWG )
3. Vacuum pump and oil must be above 30℉.
NMV1, if using the standard inverter drive pump. Micron vacuum gauges precisely measure and
6. Remove the evacuation hoses.
sealed system internal evacuation condition.
EXTENSION CORDS
5. Turn off the power switch on the pump and disconnect power.
7. Close the air entry cap and the air exhaust cap tightly (with the exception of models without air
3. At the beginning of the evacuation process, open the GAS BALLAST, and once the vacuum
4. After evacuation is completed, shut down the pump and close the system access valves.
2. Please pay attention to any changes in the oil level during pump operation. If the oil level falls
display system evacuation during the entire process, giving you a comprehensive view of the
below the center line, immediately add more vacuum pump oil to avoid damage to the pump.
2. In good condition
USE GUIDE
Exhaust
INDOOR APPLICATION
To exhaust externally
1. Remove oil mist filter
2. Attach KF25 fitting
3. Attach hoses (not supplied)
OUTDOOR APPLICATION
Oil Mist Filter
KF25
1. When using the vacuum pump, remove the inlet protection cap
and connect the pump to the system or piping to be evacuated.
Use shortest hoses possible for faster and more thorough
evacuation.

MAINTENANCE
1. 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,
causing it to be less effective as a lubricant and pump vane seal, extending evacuation time and
possibly allowing the pump to overheat. We recommend that the oil be changed just before
evacuating each A/C-R system to insure the pump oil is in a clean condition as this is the key factor
Note: Should the pump oil become opaque, dirty, or full of moisture, promptly change oil. This will
in determining 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 oil is
greatly speed up evacuation, especially when there is a lot of moisture in system piping from
having been left open to the atmosphere for an extended period of time.
made using a unique process and can maintain proper viscosity during normal operation and
temperatures, and it’s also helpful for cold starts. Should the NAVAC oil not be available, reputable
brands of special-purpose vacuum pump oil may be used.
1. To ensure that the pump and oil are warm, run pump for approximately one minute prior to
2. While the pump is running, open one inlet port and allow oil to drain out of the pump. After turning
3. As oil stops draining, tip the pump to drain any remaining oil in the bottom of the pump.
Oil change procedure:
4. Close oil drain valve.
off pump, open the oil drain plug, and drain used oil into an appropriate vessel and dispose of
procedure prior to using the pump above).
changing oil. Do not run longer than this, as it may be possible to damage the pump.
properly.
5. Remove oil fill cap, pour in new oil until the oil is at the proper level in the sight glass (the same
REQUIREMENTS FOR WARRANTY COVERAGE
2. Products which have not been maintained or dismantled by unauthorized parties.
liable for any other costs, such as time spent in fixing the issue, refrigerant
consumption,
be performed during the warranty period.
1. Products issues due to manufacturing defects confirmed by qualified agents.
3. Products that have been used in accordance with the User Manual. All maintenance services shall
Product warranty is provided for product quality problems for one year from date of sale. For warranty
to be valid, the following conditions must be met:
Statement: Other than repairing the product defective, the manufacturer of this product will not be
Oil drains out from here
TROUBLESHOOTING
Malfunction
Low
Vacuum
Oil leak
Start-up
problems
Oil spray
Possible Cause
1. Secondary air inlet connection cap loose on the
air inlet port.
2. Damaged rubber ring inside the secondary air
inlet connection cap.
3. The volume of oil is insufficient.
4. Pump oil becomes opaque or absorbed too
many impurities.
5. The pump’s oil entry hole is clogged or the oil
supply is insufficient.
6. The pump connecting hoses, manifold or
system has a leak.
7. The pump selection is wrong.
8. The pump has been used for too long, damage
and wear to components caused increased
gaps between parts.
1. Damaged oil seal.
1. Oil temperature is too low.
2. Motor, power source or circuit board
malfunctions.
3. Foreign objects entered the pump.
4. Voltage supply is excessively low or high.
5. Overload trips.
1. Excessive oil volume.
2. Inlet port pressure is excessively high for a long
period.
2. Loose or damaged oil box connections.
Remedy
Tighten the cap.
Replace the rubber ring.
Add oil to the center line of the oil display.
Replace with new oil.
Clean the oil entry hole, clean the oil filter.
Inspect the connecting hose gaskets and
system, repair leaks.
Check the size of the container to be evacuated,
recalculate and select an appropriate pump
model.
Inspect and repair, or replace the pump.
Inspect and repair.
Inspect and remove.
Inspect the power source voltage.
After overload trip occurs, switch kept On.
Remove the power plug, wait for approximately
30 seconds before inspecting and reparing.
Replace the oil seal.
Tighten the connecting screws, replace O-rings.
Remove oil until the oil position line is reached.
Select an appropriate pump, increase the
pumping speed.
Exposed the air entry hole to the external
atmosphere, and remove the oil fume filtration
device. Use a screwdriver to turn the engine
axle in an anti-clockwise direction.
repair center. We will do our best to provide you with a quick turnaround to keep you working.
Notes:
1. The pump is inverter driven and the motor 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 to a
0706

EXPLODED VIEW REPAIR PARTS LIST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Part No. Part Name
Ref No.
P012001
P012002
P012003
P012004
P012041
P012042
P012005
P012006
P012007
P012008
P012009
P012010
P012011
P012012
P012013
P012014
P012043
P012020
P012021
P012022
P012023
P012024
P012025
P012026
P012027
P012028
P012029
P012030
P012031
P012032
P012033
P012034
P012035
P012036
P012037
P012038
P012039
P012040
Oil Lens Cover
Oil Lens
O-ring of Oil Lens
Oil Housing
Outlet Gasket
Outlet KF25
Exhaust Filter and Noise Reducer
Pump Body
Coupling
Gasket
O-ring of Oil Housing
Trestle
Gas Ballast Assy
Handle
Hook
Nut
Inlet KF25
O-ring of Inlet Port
Anti suckback valve plate
Anti suckback valve cap
Anti suckback piston assy
Anti suckback spring
Top Cover
Capacitor
Capacitor hook
Rear Cover Assy
Elastic Collar
Fan
DC Motor Assy
Coupling
Guard Board I
Guard Board II
Sheath
Rubber Gasket
Base Plate
Rubber Feet
Controller Assy
Cover Plate
0908

B1
B
H
H1
A
A2
A1
DIMENSION
NP12DA1
AA1 A2 B B1 H1
H
Unit: inch
Model
16.3 10.8 3.5 6 4.7 12.1 8.2
1110

1312