MAHLE ROU250, Operation Manual

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Safety Regulations
ROU250
1. Safety Regulations
1.1 Warnings
To avoid serious injury or death
, read this manual
carefully before operating this unit. Contact the
manufacturer using contact information on the back
cover of this manual if you have any questions.
Always think before acting
, familiarity breeds
carelessness, and carelessness can result in serious
injury or death.
Only a qualified technician should operate the
recovery machine.
Read all safety information regarding the safe
handling of refrigerant and refrigerant oil
. Including
the Material Safety Data Sheet. MSDS sheets can be
obtained from your refrigerant supplier.
Always wear safety goggles and protective gloves
when working with refrigerants
. Refrigerants can
damage skin and eyes. Avoid touching caustic liquids
or gas.
Make sure the work area is properly ventilated
.
Use ONLY authorized refillable refrigerant tanks
. The
recovery unit requires the use of recovery tanks with a
minimum of 27.3 bar (396psi) working pressure.
Do not overfill the storage tank
. The tank is full at 80%
of volume. There should be enough space for liquid
expansion---overfilling of the tank may cause a violent
explosion. A scale or a 80% O.F.P. switch must be
used to avoid overfilling the storage tank.
Do not exceed the working pressure of the recovery
tank cylinder.
Before recovering refrigerant the tank should reach
a vacuum level of 1000mbar (29.53InHg)
. This is for
purging non-condensable gases. Each tank was full of
nitrogen when produced, thus the nitrogen should be
evacuated before recovery.
When not in use ensure all valves are closed.
This will
maximize the lifecycle of the machine, as excess
moisture from atmosphere will shorten operating life.
When using an extension cord, it should be 14AWG
minimum and no longer than 7.62 meters (25 feet)
.
Failure to do so may cause excessive voltage drop and
could damage the compressor.
A dry filter must always be used and should be
replaced frequently
. We recommend replacing the dry
filter (P/N 026 80774 00) every 3 months when the
machine is in regular use. If the machine is used to
recovery pure known refrigerant use a different filter for
each type of refrigerant.
Special care should be taken when recovering from
a “burned-out” system.
Use two filters in series when
recovering from these systems. Flush out the recovery
machine with a small amount of clean refrigerant once
recovery is complete to purge off any foreign
substances left in the machine.
The system has a high & low pressure shut down
switch.
If the pressure inside the system goes above
38bar, the system will automatically shut off. The
shutoff will need to be manually reset. The low pressure
shutdown occurs at approximately 10 In/Hg (339mbar).
The machine will automatically start again when the
pressure rises to approximately 5 psi (35bar).
If the tank pressure exceeds 300psi (20.7bar), use
the TANK COOLING PROCEDURE to reduce the
tank pressure
.
When recovering large amounts of liquid, use the
LIQUID PUSH/PULL PROCEDURE.
After recovering, make sure there is no refrigerant
left in the machine. Read the SELF-PURGING
PROCEDURE carefully.
Liquid refrigerant left in the
machine may expand and destroy components.
If the recovery machine is to be stored or not used
for any substantial length of time we recommend
purging with nitrogen.
Care should be taken when moving the machine.