D
–EIMWC00408-16EN - 48/60
1.
Shut down the relevant compressor by turning the Q1 or Q2 switch to Off.
2.
Wait until the compressor has stopped and close the valve located on the liquid line.
3.
Once the compressor has stopped, place a label on the compressor start-up switch, to prevent undesired
start-ups.
4.
Close the compressor suction valve (if any).
5.
Using a recovery unit, remove surplus refrigerant from the liquid filter until atmospheric pressure is reached.
The refrigerant must be stored in a suitable and clean container.
WARNING
To protect the environment, do not release removed refrigerant into the atmosphere. Always use a recovery and
storage device.
6.
Balance internal pressure with external pressure by pressing the vacuum pump valve installed on the filter
cover.
7.
Remove the filter dryer cover.
8.
Remove the filter elements.
9.
Install the new filter elements in the filter.
ATTENTION
Do not start the machine before the cartridge has been correctly inserted in the filter dryer. The unit manufacturer will
accept no responsibility for any damage to persons or property caused during unit functioning if the filter dryer
cartridges have not been correctly inserted.
10.
Replace the cover gasket. Do not allow any mineral oil onto the filter gasket so as not to contaminate the
circuit. Use only compatible oil for this purpose (POE).
11.
Close the filter cover.
12.
Connect the vacuum pump to the filter and pull vacuum to 230 Pa.
13.
Close the vacuum pump valve.
14.
Recharge the filter with the refrigerant recovered during emptying.
15.
Open the liquid line valve.
16.
Open the suction valve (if any).
17.
Start the compressor by turning switch Q1 or Q2.
Replacement of the oil filter
ATTENTION
The lubrication system has been designed to keep most of the oil charge inside the compressor. During operation,
however, a small amount of oil circulates freely in the system, conveyed by the refrigerant. The amount of
replacement oil going into the compressor should therefore be equal to the quantity removed rather than the amount
stated on the nameplate; this will avoid excess of oil during the following start-up.
The quantity of oil removed from the compressor must be measured after having allowed the refrigerant present in the
oil to evaporate for a suitable amount of time. To reduce the refrigerant content in the oil to a minimum, it is advised
that the electrical resistances be kept on and that the oil be removed only when it has reached a temperature of
35
45°C.
ATTENTION
The replacement of the oil filter requires careful attention with regard to oil recovering; the oil must not be exposed to
air for more than about 30 minutes.
In case of doubts, verify oil acidity or, if it is not possible to carry out the measurement, replace the charge of lubricant
with fresh oil stored in sealed tanks or in a way that meet supplier specifications.
