CAP. 13 - MAINTENANCE 54 / 77 ENGLISH
M
ULTIGAS 8500 PLUS
13.4 DRYER FILTER CHANGE
The dehydrator filter must be replaced after having dehydrated 45 kg of refrigerant fluid, since the
filter capacity to keep the humidity present in the refrigerant will run out.
To replace the dryer filter, from the MAINTENANCE menu select DRYER FILTER REPLACEMENT:
press “RESET” to set the counter to zero and to start the filter replacement procedure.
Now you can replace the filter.
Required equipment:
1 Medium-sized cross-tip screwdriver
1 regular or torque Hex key (24 mm)
1 Hex key (17 mm)
For replacement, comply with the instructions outlined below:
1. disconnect the HP and LP hoses from other systems/circuits or vehicles and close the quick
couplers
2. the unit turns on and empties the hoses.
3. Confirm to have already worn the personal protective equipment (PPE) and follow the safety
regulations in force.
DANGER OF CONTACT WITH R134a or R1234yf REFRIGERANT and motor vehicle A/C system oil
4. Before opening the doors of the equipment, switch off the disconnector and disconnect the
machine from the power supply.
DANGEROUS VOLTAGE HAZARD
5. Remove the screws that fix the rear door of the unit.
6. Unscrew the 2 connection nuts of the filter by means of the hex keys.
7. Remove the straps that wind up the filter
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