Maintenance And Cleaning; Maintenance Schedule; Cleaning Of Heat Exchanger; Refilling Of Coolant - Laird OL 4503 Operation Manual

Maintenance and Cleaning

Maintenance Schedule

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
Heat Exchanger Clean
Coolant container Check filling
Coolant quality Inspect
visually
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:
1) Switch off the unit.
2) Unscrew the four screws holding the unit cover with a AF10 wrench and remove the cover.
3) Clean the heat exchanger using compressed air opposite to the direction of air entrance into the unit
(i.e. from the inside out).
4) Remove any pollution from the ventilation grids using a vacuum cleaner.
5) 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
6.2.2 on page 20.
Laird Technologies GmbH
28
Operation Manual (Translation)
Interval Criteria
Minimum weekly Plate fins and
(if required, daily) ventilation grids
not polluted
Weekly Coolant indication
in the center of
inspection glass
Weekly Absence of
cloudiness or
floating particles
Date: 06-Jul-2015
Version: 2.0
Tools Performer
AF10 wrench, Operating
compressed-air, personnel
vaccum cleaner
Funnel, measuring Operating
cup personnel
Inspection glass Operating
on coolant personnel
container
Oil-Air Cooling Unit OL 4503
1264.00