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ATT025-040
6 Maintenance
a) The machine is designed and built to guarantee continuous opera-
tion; however, the life of its components depends on the maintenance
performed.
b)
Z
When requesting assistance or spare parts, identify the ma-
chine (model and serial number) by reading the data plate located on the
unit.
c) Circuits containing 3 kg or more of refrigerant fl uid are checked to
identify leaks at least once a year.
Circuits containing 30 kg or more of refrigerant fl uid are checked to iden-
tify leaks at least once every six months. ((UE) No. 517/2014 art. 4.3.a,
4.3.b).
d) For machines containing 3 kg or more of refrigerant fl uid, the opera-
tor must keep a record stating the quantity and type of refrigerant used,
an quantities added and that recovered during maintenance operations,
repairs and fi nal disposal ((UE) No. 517/2014 art. 6). An example of this
record sheet can be downloaded from the site: www.dh-hiross.com.
6.1 General instructions
!
Before any maintenance, make sure:
• the pneumatic circuit is no longer pressurized;
• the dryer is no longer powered.
Always use the Manufacturer’s original spare parts: otherwise the Manu-
facturer is relieved of all liability regarding machine malfunctioning
Z
In case of refrigerant leakage, contact qualifi ed and authorized
personnel.
Y
The Schrader valve must only be used in case of machine malfunc-
tion: otherwise any damage caused by incorrect refrigerant charging will
not be covered by the warranty.
6.2 Refrigerant
Y
Charging: any damage caused by incorrect refrigerant replacement
carried out by unauthorized personnel will not be covered by the war-
ranty.
Y
The equipment contains fl uorinated greenhouse gases.
At normal temperature and pressure, the R134a refrigerant is a colour-
less gas classifi ed in SAFETY GROUP A1 - EN378 (group 2 fl uid accord-
ing to Directive PED 2014/68/EU);
GWP (Global Warming Potential) = 1430.
!
In case of refrigerant leakage, ventilate the room.
6.3 Desiccant agent
The desiccant agent used is not harmful; during the fi lling and emptying
of the tanks, observe the following warnings:
a) wear a dust mask and protective goggles
b) If the material is accidentally dispersed to the ground, immediately
clean
!
Risk of slipping.
6.4 Preventive Maintenance Programme
To guarantee lasting maximum dryer effi ciency and reliability:
Maintenance
Activity description
Maintenance Interval
(standard operating
conditions)
Activity
Control
Service
Daily
W
eekly
4 Months
12 Months
24 Months
48 Months
Check the POWER ON indicator is lit.
Check control panel indicators
Check the correct level of the fl ow meter.
Check condensate drain.
Clean condenser fi ns.
Check electrical absorption
Depressurize the unit.
Complete drain maintenance
Depressurize the unit.
Substitute pre- and post-fi lter elements.**
Substitute fi lter element, oil separator fi l-
ter and dust preventer fi lter.
It is recommended to replace the pres-
sure dew point sensor.
Main solenoids- change
Check the silencer yearly and when
change the desiccant agent
No return Valve- change
Solenoids Drain- change
Desiccant agent
