Weir Warman 650 M200-MCR-G, Manual, Page: 283 / 287

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7.0 Maintenance
In case of normal operation FUNKE oil-air cooling units are
nearly maintenance-free.
Essential operating data like pressure and temperature as
well as tightness of the system must must be checked
regularly, (once monthly at least) depending on conditions of
use.
Follow safety instructions section 2.0!
Works on the oil-air cooling unit are allowed only if
- the fan drive has been disconnected from the electrical
supply, after the hydraulic drive has
been disconnected from the oil pump respectively.
- the unit is not under pressure, the temperature of the
medium to be cooled does not exceed
40°C and the unit has been drained!
Cleaning of the oil-air cooling unit
Airside dirt deposit on the suction side of the cooling
elements can be removed by brushing or vacuum.
In case of heavy dirt proceed as follows:
- dismantle oil-air cooling unit as described under 6.4
- remove fan and drive
- clean cooler core with compressed air and/or steam jet
(cold cleaner can be added) against
the direction of airflow
Caution!
Do not damage or bend the core fins. This would result in
drop in performance!
Internal cleaning (only partly)of the cooler is depending on
kind of dirt.
Deposits as a result of insufficiently filtered oils can be
removed for instance by filling with degreasing agent. After
reaction time rinse with clean operating liquid.
By no means cleaning liquids may be used, which are
attacking aluminium!
8.0 Cause of faults / removal of
faults
The cause for a capacity loss can be on the airside and also
inside the oil-air cooling unit.
1. Too low mass flow
check or correct:
- rotational speed of pump
- rotational speed of fan
- direction of rotation of fan
- electric / hydraulic connection
- increased pressure drop in the system
2. Increased pressure drop
Check or correct:
- narrowed flow cross-section due to deposits / foreign
matters
- narrowed flow cross-section due to mechanical
effect
3. Too low inlet temperature difference
Check or correct:
- increased air inlet temperature
4. Deviations between design conditions and conditions of
use
Check or correct respect:
- temperature
- mass flow
- physical properties
In case of a motor failure the user instructions of the motor
manufacturer must be followed!
9.0 Environmental protection /
disposal
FUNKE oil-air cooling units are building a closed system.
Provided are proper connection and correct operating mode.
However, in case of incorrect operating mode or incorrect
connections, or caused by mechanical effects, leaks cannot
be excluded.
If in case of a leak at set-up site the medium to be cooled is
directly reaching the environment (soil or water circuit),
the user has to place an appropriate collecting devices (for
instance a back leakage sump). Furthermore, pertinent
environmental protection regulations and possibly special
regulations concerning handling of the medium to be cooled
must be complied with.
Disposal of the oil-air cooling units must be made in
accordance with the rules for disposal of oil and hydraulic
fluids as well as for electronic components like motors and
switches.
Important!
BA FUN.OLK.001 EN 10.08
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