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Service manual VA500-VA750 ed.1 ver.5.05 [MANU360.SA0].doc
pag.13 - 18/10/2005
ROUTINE MAINTENANCE
FILLING THE MACHINE BOTTLE
This operation must be performed whenever the available refrigerant in the bottle is less than 3
kg and must in any case be performed when the “empty bottle” indicator lights on the control
console.
IMPORTANT: Never tamper with the taps on the
machine
bottle. Procure a bottle of R134a
gas; connect it to the high-pressure hose of the
MACHINE
. Open the tap of the external bottle
and the high-pressure tap of the
MACHINE
. If the external bottle is not supplied with a suction
device, turn it upside down to obtain a higher delivery rate. Switch the
machine
on, then hold
down the SEL key until the LED corresponding to “Recovery” lights. Press the START key to
start the
MACHINE
. The display will indicate the quantity of refrigerant transferred to the bottle
on board the machine. Close the tap of the external bottle when the quantity transferred is 0.50
kg less than the final quantity desired. Allow the
machine
to recover the fluid remaining in the
hose. The “oil discharge” LED will light when the
machine
will have recovered all the fluid from
the hose. The
machine
will stop automatically. Close the high-pressure tap on the
MACHINE
,
press the STOP key, and disconnect the external bottle.
VACUUM PUMP
Perform the operations listed below on a routine basis in order to ensure good operation of the
vacuum pump.
M.1) Oil top-up
M.2) Oil change
M.3) Decontamination (only Model “A”)
When topping-up or replacing the pump oil, use only the oil recommended by the
manufacturer. Contact the distributor for information concerning the correct type of oil.
NOTE: in order to correctly check the oil level it is suggested to run a 1 minutes of vacuum, and
the verify the oil level.
M.1) Oil top-up
This operation must be performed when the level of the oil falls to less than half on the indicator
(4). To refill the oil, perform the steps listed below in the order given. Disconnect the
machine
from the mains supply. Locate the oil cap (3) and screw it off. The oil will be added through the
hole in which the oil cap was lodged (3). Add oil a little at a time, waiting for the level to rise
before each successive addition, until the oil level is about ½ cm above the red mark on the
indicator (4). Replace the oil cap (3) and tighten down.
M.2) Oil change
The vacuum pump oil must be replaced every 150 working hours and in any case every time
the refrigerant filters are replaced. The oil must also be changed whenever it changes color
due to absorption of humidity. Before beginning the oil change procedure, procure a container
of at least 500 cc capacity in which to collect the used oil. The pump contains about 500 cc of
oil. Use only suitable ISO68 oils (Contact your vacuum pump distributor for specific
information).
1) Disconnect the machine from the mains supply.
2) Unscrew the filling cap (3).
