Parker PST090, User Manual, Page: 7 / 84

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5/6
PST 090-340
6 Maintenance
a) Th e machine is designed and built to guarantee continuous opera-
tion; however, the life of its components depends on the maintenance
performed;
b) when requesting assistance or spare parts, identify the machine
(model and serial number) by reading the data plate located on the
unit.
c) An example of this record sheet can be downloaded from the site:
www.polewr.com.
6.1 General instructions
!
Before any maintenance, make sure:
• the pneumatic circuit is no longer pressurized;
• the dryer is disconnected from the main power supply
.
Y
Always use the Manufacturer’s original spare parts: otherwise the
Manufacturer is relieved of all liability regarding machine malfunctio-
ning
Y
In case of refrigerant leakage, contact qualifi ed and authorized per-
sonnel.
Y
Th e Schrader valve must only be used in case of machine malfun-
ction: otherwise any damage caused by incorrect refrigerant charging
will not be covered by the warranty.
6.2 Refrigerant.
Charging: any damage caused by incorrect refrigerant replacement car-
ried out by unauthorized personnel will not be covered by the warranty.
Z
Y
At normal temperature and pressure, the R407c refrigerant is a
colourless gas classifi ed in SAFETY GROUP A1 - EN378 (group 2 fl uid
according to Directive PED 97/23/EC)
GWP (Global Warming Potential) = 1652,5.
!
In case of refrigerant leakage, ventilate the room.
6.3 Preventive Maintenance Programme
To guarantee lasting maximum dryer effi ciency and reliability
Maintenance
Activity Description
Maintenance Interval
(standard operating conditions )
Activity
Check Service Da
ily
W
eek
ly
4 M
on
ths
12 M
on
ths
36 M
on
ths
Check POWER ON indicator is lit.
Check control panel indicators.
Check condensate drain.
Clean condenser fi ns.
Verify that the crakcase heater is cor-
rectly positioned
Check electrical absorption.
Check refrigerant leaks.
Depressurize the dryer. Complete
drain maintenance.
Depressurize the dryer. Replace pre-
and post-fi lter elements.
Check temperature sensors.
Replace if necessary.
Dryer maintenance kit.
Th e following are available (see par. 8.4):
a) 3 years preventive maintenance kits;
b) service kit
• compressor kits;
• fan kits;
• hot gas valve kits;
• water condenser kits;
c) individual spare parts.
6.4 Dismantling
Th e refrigerant and the lubricating oil contained in the circuit must be
recovered in conformity with current local environmental regulations.
%
Recycling Disposal
Z
structural work steel/epoxy-polyester resins
exchanger aluminium
pipes/headers copper/aluminium/carbon steel
drain polyamide
exchanger insulation EPS (sintered polystyrene)
pipe insulation synthetic rubber
compressor steel/copper/aluminium/oil
condenser steel/copper/aluminium
refrigerant R407c
valves brass
electrical cables copper/PVC