5 Commonwealth Ave
Woburn, MA 01801
hone 781-665-1400
P
Toll Free 1-800-517-8431
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Recovery Unit for
Flammable Refrigerants
NRDDF
User Manual
Certifications
General Safety
Operation Manual
Specification
Introduction of Operation Panel
Parts Diagram
Wiring Diagram
Operating Instruction
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CERTIFICATIONS
Design standard:
UL 121201: Ninth Edition
CSA-C22.2 No.213-17
UL 1963: Fourth Edition
CSA-C22.2 No.120-13
IEC: 60079-0, 60079-7
IN ACCORDANCE WITH SECTION 608 OF THE CLEAN AIR ACT:
THIS EQUIPMENT HAS BEEN CERTIFIED BY UNDERWRITERS
LABORATORIES INC. TO MEET EAP’S MINIMUM REQUIREMENT
FOR RECOVERY EQUIPMENT INTENDED FOR USE WITH
CATEGORY III, IV, AND V REFRIGERANTS OUTLINED IN
AHRI-740-98, TABLE 4.
Marking:
Class I, Division 2, Group D T4
WEEE
(Do not dispose through
typical waste streams)
1). Refrigerant Hoses Exhaust
2). Recovery Mode
3). Self-purge Mode
4). Liquid Push/Pull Mode
Trouble Shooting
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01
In order to prolong the life cycle of the recovery unit, please read the manual carefully before using to fully
understand the safety, specification as well as operating procedure of the recovery unit.
For recovering only HVAC/R refrigerants from sealed HVAC/R systems. Warranty VOIDED if used for any
other purposes.
Only a qualified technician should operate this recovery unit.
Before starting the equipment, make sure that it is well grounded.
If using electrical extension cord, the cord must be in good condition and properly connected and grounded.
Only a qualified electrician can do the wire connection according to the technical standard and circuit diagram.
The power must be cut off and no display in LCD before inspecting or repairing.
If the original power supply cord is damaged, an OEM replacement may be ordered through your NAVAC
distributor.
Please check the capacity of your power supply, ammeter, electrical wires and circuit before use.
A dig ital scale is needed to prevent overfilling.
Before connecting, be sure to turn on the refrigerator to check:
1. If the fan is working properly (if there's air blowing out from the condenser side).
2. Connect the check valve to the outlet port and close the check valve. Keep the inlet port open to
atmosphere. Turn the knob to the "FAST" position and start the machine. The pressure on the outlet side
should rise to 560Psi (38.6bar) within 65secs. After that, the high pressure switch protection switch is on,
and the machine will automatically shut down.
The equipment is intended for serving air-conditioning and refrigeration systems containing less than 200 lbs
of high-pressure refrigerant.
The tank and hose used must comply with the local regulations.
0302
3. The knob should be in the "Close" Position before operation. All the valves must be closed, the input and
output fittings should be covered with protective caps when the unit is not in operation. The air/ moisture is
harmful to the recovery result and will shorten the life span of the unit.
4. A filter drier should always be used and should be replaced regularty. And each type of refrigerant must have
its own filter. For the sake of ensuring the normal operation of the unit, please use highquality filter drier
specified by our company. A high quality filter drier will help protect machine .
determine
plugged
cool the tank down.
NRDDF
Rerfigerants
High Temp Vapor
Direct Vapor
Direct Liquid
Push/pull Liquid
NRDDF
Category III: R12, R134a, R401C, R500, R1234YF, R600a
Category IV:R22, R401A, R401B, R402B, R407C, R407D, R408A,
R409A, R411A, R411B, R412A, R502, R509, R290
Category V: R32, R402A, R404A, R407A, R407B, R410A, R507
R-22a
0.62 lbs/min
0.55 lbs/min
6.88 lbs/min
14.2 lbs/min
115V, 60Hz
Brushless Motor, 1 HP
3000 RPM
12A
Oil-less, Air-cooled, Piston
38.5bar/3850kpa(558psi)
32~104°F
14.5x9.9x11.7 inch
25 lbs
R-134a
N/A
0.37 lbs/min
5.34 lbs/min
11.0 lbs/min
NRDDF
R-410a
N/A
0.49 lbs/min
7.98 lbs/min
15.1 lbs/min
0504
Start/Stop: Starts and Stops recovery unit.
LP Switch: Hold for 3 seconds to switch between LP1, LP2, Lp3.
Units/Zero: Press to change units to InHg, Kpa, Psi, Kg/f, Bar, Mpa.
Hold for 3 seconds to zero out readings.
Cancel Alarm: Hold for 3 seconds to mute recovery unit.
LP1: (Auto shutoff with manual restart)
if the inlet pressure is lower than -20inHg for 20 seconds, the unit will shut down.
“LP Cutoff” will be displayed.
When LP ≥ 0 inHg you must press START to restart the recovery unit
LP2: (Auto shutoff with automatic restart)
if the inlet pressure is lower than -20inHg for 20 seconds, the unit will shut down.
“LP Cutoff” is displayed.
When LP ≥ 0 inHg the unit will restart automatically.
LP3: (Continuous Run)
The recovery unit will run continuously, no matter what the level the input pressure
is (LP)
Restart: It will flash after an error has occurred and settled. Pressing “START” will resume activity.
Fault: Error Codes
E1: The pressure sensor is disconnected
Fault 2: Input voltage is too low
Fault 3: High input voltage
Fault 4: Overcurrent protection
Fault 7: Temperature protector open
Fault 8: Motor stalling
Mute: Audible alerts and beeps are turned off.
.
Fan: This icon rotates while the machine is running. When the machine stops, the icon
stops rotating.
O.F.P Cutoff: Will light up when the recovery cylinder is 80% filled, or if the OFP cable is
opened. The machine will stop running.
LP Cutoff: will light up when low pressure switch is activated for more than 20 seconds
below -20 inHg.
HP Cutoff: Will light up when high pressure switch is activated above 560 Psi.
0706
7
8
2
1
3
4
20
Parts name Parts name
1
O.F.P Adaptor Assy
2
Left side Plate
3
Fan
4
Wind Guide Cover
5
Motor
6
Support Assy
7
Top Plate
8
Knob
9
Control Assy
10
Valve Assy
6
5
11
12
13
14
15
16
17
18
19
20
9
10
11
12
13
19
18
14
15
Cylinder
Copper Pipe
Coupling
Compressor
Condenser
Rear Plate
Right Side Plate
Base
Motor Control Board (MCB)
Front Side Plate with Digital Manifold Gauge
16
17
Graphics Code
HS
M
MCB
XS
DCB
LS
OFP
TP
HP
ITEM
High pressure sensor
Motor
Motor control board
Socket
Digital gauge control board
Low pressure sensor
Over filling protector
Temperature protector
High pressure switch
0908
NRDDF
Ball valve
Ball valve
4
8
4
7 7
Ball valve
4
NRDDF
6
Preparation
It's required to use hoses with ball valves on this
recovery machine. Connect the hose correctly and firmly
(see diagram above)
1. Check the refrigeration device and make sure the gas
valve and liquid valve are closed.
2. Check the refrigerant tank and make sure the gas valve
and liquid valve are closed.
3. Open the gas valve and liquid valve of the manifold
gauge.
Open the ball valves on the recovery machine outlet 4.
and valves on the hose connected to the outlet
5. Power on the recovery machine, the LCD screen will
display the inlet and outlet pressures.
6. Turn the knob to “FAST”.
Start
7 Start the vacuum pump and let it run until the .
recovery machine's display (low pressure)
shows above -20inHg.
8 Close the ball valve of the vacuum pump hose .
which is connected to the refrigerant tank.
9. Turn the knob to “Close”.
10. Connect the recovery machine outlet to the
refrigerant tank with a hose.
Preparation
Connect the hoses correctly and firmly.
(Please refer to the connection diagram)
Make sure all valves are closed.
1. Switch off the power of refrigerant equipment.
2. Open the vapor and liquid valves of refrigerant
equipment.
3. Open the vapor valve of the refrigerant tank.
4. Open the ball valves on the hose connected to
the recovery machine outlet
Start operation
5. Press the "START" button to start machine.
6. Turn the knob to "Recover".
7.a. If recover liquid refrigerant, please open the liquid
valve of the manifold gauge.
b. If recover vapor refrigerant, please open the vapor
valve of the manifold gauge.
8. Recovery is completed when machine enters into
a vacuum. In Automatic shutoff this would be at
-20inHg
9. When recovery is completed, you can run
self-purging right away without powering off.
Notice
Ifliquidhammerhappensintherecovery,please
slowlyturntheknobto"Slow"position,letthe
readingofthelow-pressuregaugedropsuntilliquid
hammerstops.Donotletthereadingdroptozero,
otherwisetheinletportwillnotpump.
If it is difficult to start, turn to “CLOSE” when liquid,
turn to “PURGE” when vapor, then press “START”
to restart the machine, and turn to the required
position.
1110
The unit must be purged every time after use;
Liquid refrigerant remained may expand and damage the components and pollute the environment.
An electronic scale is needed to monitor the recovery process to prevent overfilling.
Ball valve
7
Ball valve
7
NRDDF
Start operation
1. The machine stops automatically after recovery finished based on LP cutoff setting.
2. Turn the knob to “Close”, press “START” button to start the machine.
3. Turn the knob to “Purge” and start self purging.
4. The self purging mode will be finished when machine automatic stops or runs to certain vacuum level.
Finish operation
5. Turn the knob to “Close”.
6. After confirming the machine has stopped, unplug the power cord from the charger to the power socket first,
then unplug the cord from the charger to the recovery machine to avoid sparks.
7. Close the ball valves at both ends of the outlet hose.
8. Close the vapor valve of the tank.
9. Remove all the hoses and recycle them properly.
Hose 1
7
13
Refrigerant
equipment
Hose 1
6
7
13
Ball valve
5
8
15
Preparation
Connect the hoses correctly and firmly.
(Please refer to the connection diagram)
Make sure all valves are closed.
1. Turn the knob to “FAST”.
2. Connect hose 1 to the vacuum pump.
3. Start the vacuum pump to pump the vacuum.
4. Let the vacuum pump run for 20 secs, close the
ball valve on hose 1, turn off the vacuum pump,
and remove the hose from the vacuum pump.
5. Connect hose 2 and repeat step 2, 3, 4
6. Connect the hoses to the gas port of the system and
the liquid port of the refrigeration tank.
Start operation
7. Open the vapor valve, liquid valve of the HVAC
system.
8. Open the ball valves on the connecting hose 1 and
hose 2
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Refrigerant tank
Electronic scale
NRDDF
Hose 2
1
6
Ball valve
5
8
16
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9. Open the vapor valve, liquid valve of the tank.
10. Press “START” button to start machine, then it starts
liquid push/pull mode.
* If the reading on the scale keeps the same or changes
slowly, it means liquid in HVAC system has been
recovered and vapor recovery mode can be underway.
11. Turn the knob slowly to “Purge” and start self
purging mode for the liquid.
12. Turn the knob to “Close”
13. Close the vapor valve, liquid valve of the HVAC
system.
14. Close the vapor valve, liquid valve of the tank.
5 ball s1 . Close the valve on the hose connecting the
recovery machine outlet and the system.
1 . Close the valve on the hose connecting the 6 ball s
refrigerant tank and the system.
17. Reconnect the hoses, and start recovery mode for
the vapor.
Finish
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1312
PROBLEM CAUSE SOLUTION
LCD does not
work after
power is on
Machine does
not run after
pressing START
Machine stops
after running a
period of time
E1 shows at LP
or HP
Slow recovery
rate
Not evacuate
Attention
Ifyouhavethecompressorrepairedinanycircumstances,pleasedoaleaktestbeforeuseandmakesure
there'snoleak.
How to do the leak test:
1. Block the outlet port with a ball valve, keep the inlet in connection with the atmosphere;
2. Turn the knob to the "FAST" and start the machine. When the outlet pressure rises to 30bar, press the "STOP",
and then turn the knob to the "PURGE".
3. Leave it alone for 30 minutes. Check the reading of the low pressure gauge. If the pressure is higher than 15bar,
then it passes the test. If it is lower than 13bar, there a leak; if it is between 13bar and 15bar, leave it for another
30 minutes. If the pressure drops ≤ 2bar, then it passes the test
1. Power cord is damaged.
2. Inner connection is loose.
3. Connect to J6 is damaged.
4. Malfunction of circuit board.
1. HP Cutoff, or OFP Cutoff works
(screen shows.)
2. Fault 2 or Fault3
3. Fault 4 or Fault 8
4. Fault 7
5. Button is damaged.
6. Circuit board is damaged.
1. Misoperation causes HP Cutoff.
2. Thermal protector is on and shows
Fault 7.
3. Refrigerant is 80% in the tank, and
O.F.P Cutoff shows.
4. low pressure protection switch is on.
Pressure sensor is not connected well
or is open circuit.
1. The pressure of the refrigerant tank
is too high.
2. The valve is not open enough.
3. Piston ring of compressor is damaged.
1. Connection hose is loose.
2. Machine leaks.
1. Replace cord.
2. Check the connection.
3. Replace the connect.
4. Replace MCB or DCN circuit board.
Contact NAVAC tech support
1. Check if the connection between
HP or OFP to DCB is good.
2.1 Adjust to correct voltage.
3.1 If this happens only when starting the machine:
for liquid recovery, turn the knob to "CLOSE",
for gas recovery, turn the knob to "PURGE",
press "START" again to start the machine,
and turn the knob to "FAST".
3.2 Only when inlet pressure is too high or fluid
hammer happens , turn the knob to "SLOW"
3.3 When error occurs at no load, power off the
machine and check if the fan can be manually
rotated. If yes, replace the control board. If not,
send the machine back to the factory for repair.
4. Check if the connection between TP and MCB
is good. If good, contact NAVAC tech support.
5/6. Replace the front side plate with digital
manifold gauge.
1. Refer to section 6 of OPERATION MANUAL on
page 3.
2. When Fault 7 and Restart flash, press START.
3. Replace the tank. When O.F.P Cutoff and
Restart flash, press START.
4. See refer to self-cleaning operation steps for
self-cleaning.
Check if the connection between LS or HS to DCB
is good. If good, replacepressure sensor.
1. Cooling the tank help decrease the pressure.
2. Turn the knob towards “FAST”.
3. Contact NAVAC tech support.
1. Tighten the connection hosed.
2. Contact NAVAC tech support.
MCB2.2 If the voltage is correct, replace the
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