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9. Maintenance and Cleaning
Diligent maintenance is the prime factor for assuring an error-free and efficient operation of the unit.
Operating personnel can perform these tasks when properly trained.
9.1 Maintenance Schedule
Device
Activityt
Interval
Criteria
Tools
Performer
Heat Exchanger
Clean
Minimum weekly
(if required, daily)
Plate fins and
ventilation grids
not polluted
AF10 wrench,
compressed-air,
vaccum cleaner
Operating
personnel
Coolant container Check filling
Weekly
Coolant indication
in the center of
inspection glass
Funnel, measuring
cup
Operating
personnel
Coolant quality
Inspect
visually
Weekly
Absence of
cloudiness or
floating particles
Inspection glass
on coolant
container
Operating
personnel
Table 10:
Maintenance schedule
9.2 Cleaning of Heat Exchanger
Cooling capacity is reduced to a large extend, if the heat exchanger is polluted. The heat exchanger
must be checked for pollution regularly and be cleaned, if required.
For cleaning the heat exchanger follow these steps:
2)
Switch off the unit.
3)
Unscrew the four screws holding the unit cover with a AF10 wrench and remove the cover.
4)
Clean the heat exchanger using compressed air opposite to the direction of air entrance into the
unit (i.e. from the inside out).
5)
Remove any pollution from the ventilation grids using a vacuum cleaner.
6)
Remount the unit cover.
The unit is ready for operation.
9.3 Refilling of Coolant
Since the cooling circuit is an open circuit, evaporation of coolant may occur. Thus the filling level of
the coolant container has to be checked regularly, and coolant might have to be refilled as described
in chapter 6 on page 20.
9.4 Cleaning of Unit Casing
Regularly remove dirt from the casing of the unit to prevent corrosion damage and clogging of the air
grids. Pay attention that all the plates at the unit are always clean and legible.
CAUTION
Risk of damage through use of improper cleansing material. When using aggressive or abrasive
cleaning agents corrosion may occur as result of a damaged paint film.
For cleaning the unit casing only use mild cleaning agents (e.g. dish washing detergents)!
Use clean and lint free cloth for cleaning!
