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1. Refrigerant Hoses’ Exhaust
2. Recovery Mode
NRRD
Recovery Unit
User Guide
Ready for operation
1. Connect hoses correctly and tight, referring to the connection diagram.
2. Open the vapor and liquid valves of manifold gauge.
3. Loosen the connecting hoses of refrigerant tank.
4. Open the valve to the hoses.
Start operation
1.
Turn the switch to positon START.
2.
Press button.
3.
Turn the switch to position 2 and start purging the air out of the hoses.
4.
While the input gaug e gettin g to 15" of vacuum (-1 bar ) turn the swit ch to positi on 3 to start selfpurge.
5.
While the input gauge getting to 15” (-1 bar) again, turn the switch to position 0 to finish self-purge.
6.
Tighten the hoses at refrigerant tank.
Finish operation
1. Press button.
Ready for operation
Connect hoses correctly and firmly. (Please refer to
1.
the connection diagram)
Make sure all valves are closed.
2.
Turn off the power to system equipment.
3.
Open the vapor and l iquid valves of refr igerat ion
4.
or air condit ionin g system equi pment .
5.
Open the vapor valve of the refrigerant tank.
Start operation
Turn the switch to the position START.
1.
Press button.
2.
Open the liquid valve for liquid recovery. Open the
3.
vapor valve for vapor recovery.
4.
Turn the switch slowly to positon 2 for faster recovery.
5.
When the recovery is finished, the unit gets to the
required vacuum or automatically stops by low
pressure protection.
Notice
1.
If compressor liquid slugging occurs at
position 2, turn the switch to position
“START” until the liquid slugging stops.
2.
If the recovery restarts after interruption
of power or fails to start,
2.1 Turn the switch to positon START,
turn on the power switch, press
START button for liquid recovery.
2.2 Turn the switch to position 3,turn on
the power switch, press START
button for vapor recovery.
Notice
1.
Turning the switch to position 1 gets a
stable recovery of liquid with low speed of
1.2kg/Min.
2.
If compres sor slugging occur s at the
position 1 turn the switch slowly to position
START until slugging stops. Make sure the
pressure is at zero, because it doesn’t
work at 10.
3.
There is no need to turn off the power and it
can do the self-purge cycle automatically.
Notice
The unit must be purged after each use;
Liquid refrigerant remained may expand
and damage the components and pollute
the environment.
Notice
Ready for operation
1. The unit stops automatically when recovery is finished.
2. Press button.
3. Turn the switch slowly to position 3 to start purge.
4. When the self-purging cycle is finished, the unit goes into a vacuum.
Finish operation
1. Turn the switch to position 0.
2. Press button.
3. Close the check valve to hoses.
4. Turn off the vapor valve of refrigerant tank.
4. Liquid Push/Pull Mode3. Self-purge Mode
Notice
An electric scale is needed to monitor
the recover process to prevent overfilling.
Ready for operation
Connect the hoses correctly and firmly.
1.
(Please refer to the connection diagram)
Make sure all valves are closed.
2.
Start operation
Warning
When the ele ctric s cale show s that t he
refrig erant in the tank h as reac hed 80%
capacity, turn the power off and close the tank
valves.
1.
Open the vapor and liquid valves of the
system equipment.
2.
Open the vapor and liquid valves of the
recovery tank.
3.
Turn the switch to position START.
4.
Press button.
5.
Turn th e switch to posi tion 2 t o star t
push/pull mode. When the display of electric
scale stops r ising or increases very slowly, it
means the liquid recovery is finished, and it is
time to switch to vapor recovery.
6.
Turn the switch to position PURGE and follow
self-purge mode instructions to purge the
refrigerant vapor.
7.
Turn the switch to position OFF.
8.
Press button.
9.
Close the vapor and liquid valves of the
system equipment
10.
Close the vapor and liquid valves on the
recovery tank.
11.
Connect the hoses again and recover the
vapor from the system equipment according
tto recover y mo de i nstructio ns.
TroubleShooting
FAULT
Fan no
response
Compressor
not start
(Jammed)
Press the “ ”
button but
compressor no
respense
Compressor start
but stops within a
few minutes
Low recovery
speed
Unit doesn’t pull
out a vacuum
Warning
It'snotsuitableforclassA3refrigerantsandtoxicrefrigerantsofclassB2,B3.
Mechanical damage
1.External pressure is too high
2.Motor failure or other components damaged
1.a.Shut off by high pressure protection,
2.The “ ” light is not bright,Internal
1.High prssure shut off due to wrong
2.Motor thermal protector shuts off
3.Circuit breaker shuts off
4.a.80% over filling protection
alarm light goes out after a flash
1.The pressure of refrigerant tank is
2.Piston ring of the compressor is damaged
1.Connecting hoses are loose
2.Leakage in the unit
CAUSE SOLUTION
red alarm light turns on.
b.Low pressure protection,green alarm
light turns on(recovery not finished)
c.80%O.F.P. cable not well connected
with tank.
wiring falut.
operation,such as:
Outlet valve not open,
Refrigerant tank valve not open
red alarm light turns on
b.Recovery is over and the unit is
under low pressure protection,green
alarm light turns light
c. Overload during liquid recovery,red
too high
1.Replace the fan
2.Factory service required
1.a.When recover the liquid,
turn the knob to “SRART” positon,
then restart
b.When recover the vapor
turn the knbo to “PURGE” / “3”
position,then restart
2.a.Replace the components
b.Factory service is needed
1.a.Lower the pressure of the unit
b.Check if the hoses are well connected
c.Check the connection
2.a.Be checked by qualified technician
b.Factory service required
1.Read carefully the OperationManual
and follow the instructions while operating
2.The compressor will restart
automatically after a few minutes
3.Cooling the Circuit breaker dowm and
press “circuit breaker” to restart
after 5 minutes.
4.a.Replace with an empty recovery tank
b.Refer to step of self-purge method
c.Turn the knob to “START” position,
then restart
1.Cool the tank down can help bringing
down the pressure
2.a.Replace the components
b.Factory service required
1.Tighten the hose connections
2.a.Replace the components
b.Factory service required
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