Safety Precautions And Operation Guidelines - wigam EASYREC 120R100 Manuel D'utilisation

EASYREC120

Safety precautions and Operation guidelines

a) Read all safety, operating guidelines and instructions before operating this unit.
b) Only a qualified technician should operate this recovery unit!
c) Always wear safety glasses and protective gloves while working with refrigerants to protect your
eyes and skin from refrigerant gases and refrigerant liquid. Avoid getting in touch with caustic
liquid or gas.
d) Do not expose the equipment to the sun or rain.
e) Be sure that any room where you are working is thoroughly ventilated.
f) Use ONLY authorized refillable refrigerant cylinders. It requires the use of recovery cylinders
with a minimum working pressure of 27.6 bar.
g) Do not overfill the recovery cylinder. Cylinder is full at 75% capacity. There should be enough
space for liquid expansion. Overfilling of the cylinder may cause a violent explosion.
h) Do not exceed the working pressure of the recovery cylinder cylinder.
i) Do not mix different refrigerants together in one cylinder, or they could not be separated or used.
j) Before recovering the refrigerant, the cylinder should achieve the vacuum level: -0.9 MPa, which
is for purging non-condensable gases.
k) When the unit is not used, all valves should be closed and the input and output fittings should be
covered with their protective caps, as air and/or moisture may damage the recovery
performances and shorten the service life of compressor.
l) If using an extension power cord, it should be a minimum 2.0mm
than 30 meters, or it may make the voltage drop and damage the compressor.
m) A filter drier must always be used and should be replaced frequently. Each type of refrigerant
must have its own filter. For the sake of ensuring the normal operation of the unit, please use the
filter specified by our company. High quality filter drier will bring high quality services.
n) Special care should be taken while recovering from a "burned-out" system. Use two high acid
capacity filters in series. When you have finished recovering from the system, flush the unit with
a small amount of clean refrigerant and refrigerant oil to purge off foreign substances left inside.
o) The unit has an Internal High Pressure Shut Off Switch. If the pressure inside the system goes
above 38.5 bar, the unit will automatically shut itself off and the Red Alarm Light will turn on. If
the compressor needs to be restarted, please find out the cause first, then reduce the internal
pressure below 25 bar. Press the START button to restart the compressor.
When the unit is under high pressure condition, restart the unit after eliminating the troubles
 Solutions for possible causes of High Pressure Shut Off:
1. Open the output valve of the unit if it's closed.
2. Open the input valve of the recovery cylinder if it's closed.
3. Check if the hose connected between the unit and the recovery cylinder is jammed. If yes, please
close the output valve of the unit and the input valve of the recovery cylinder and then change a new
one.
4. The temperature and the pressure of the recovery cylinder is too high (see recovery cylinder cooling
method)
p) While using the recovery unit, make sure the power of the air-conditioning system is off
q) The unit has an Internal Low Pressure Shut Off Switch (Pressure/vacuum switch). The unit will
automatically shut itself off if the inner pressure is lower than -0.2 ÷ -0.4bar and the green alarm
light will turn on. To restart the compressor, please increase the input pressure above +0.4 bar
or rotate the "BY-PASS switch" to the MANUAL position, then press the START button.
r) BY-PASS switch :
- when the BY-PASS switch is on AUTO, the pressure/vacuum switch can work,
- when the BY-PASS switch is on MANUAL, the pressure/vacuum switch can't work.
Please turn to the "Manual" position when the system pressure is lower than +0.4 bar or the system
needs high vacuum.
s) If the cylinder pressure exceeds 21 bar, use the Recovery Cylinder Cooling Method to reduce
the cylinder pressure.
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