Cosmotec OR Series, Manual

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rev 09.2017 - ©STULZ S.p.A. - all rights reserved
At the end of the maintenance operations, reassemble the protective paneling.
All operations described in this section must be done by qualified staff.
The operators and maintenance people must use the DPI in accordance with the safety manager and
prevailing legislation.
DPI=individual protection devices: gloves, helmet, goggles, accident prevention shoes, etc.
Periodic controls of the chiller must be done to check that it works properly.
In the table below, the controls to be done monthly and every 4 months are described.
ORDINARY MAINTENANCE
COMPONENT INTERVENTION INTERVAL
One-time use air filters Blow with air (if present)
1
MON
TH
Regenerable air filters Wash with water and degreasing agent (if present)
Air condenser Dust: blow with max 2 bar 0.2 MPa air (if necessary),
possibly in the opposite direction as the aspiration
Air condenser Oil residue: wash with water and degreasing agent (if
necessary)
Coolant gas light Check the presence of coolant gas: verify that when the
compressor is on, when the plant is working, there are no air
bubbles; if there are any bubbles, it could indicate a lack of
gas in the circuit in which case keep the machine under
control when it is on.
Hydraulic circuit filters Wash with water (if necessary)
Tank liquid level Feed if necessary:
- turn off the machine and wait for all the fluid present in the
circuit to go back to the tank
- feed until (and not beyond) the MAX level indicated
Air in the hydraulic circuit Release air (only if the circuit is pressurised)
Hydraulic circuit Check for any losses (slow leaks)
Fan and pump temperature
Check for abnormal temperatures
Noise and vibrations Check for any loose fastenings
ORDINARY MAINTENANCE
COMPONENT INTERVENTION INTERVAL
Control panel clamps Check locks
4 MON
THS
Clamps in the compressor Check locks
Pressure switch connection Check the connections
Contactors Check the contactors
Fans
Check locks;